1.20.1 RB

.gitattributes

@@ -3,7 +3,6 @@
 *.patch text eol=lf
 *.java text eol=lf
 *.gradle text eol=crlf
-**/MANIFEST.MF text eol=crlf
 *.png binary
 *.gif binary
 *.exe binary
@@ -22,6 +21,3 @@ src/generated/**/*.json text eol=lf
 src/generated_test/**/.cache/cache text eol=lf
 src/generated_test/**/*.json text eol=lf
 
-# We force eclipse to use unix line endings
-ide/eclipse/template/.settings/*.prefs text eol=lf
-

.github/ISSUE_TEMPLATE/feature_request.md

@@ -10,4 +10,4 @@ assignees: ''
 <!-- Please note, feature requests that are submitted as GitHub issues here are rarely implemented. -->
 <!-- If you'd like to see something in Forge, you should be ready to implement it as a PR. -->
 <!-- If you're not sure, open a Draft PR or discuss it in the Discord server. -->
-<!-- Discord: https://discord..minecraftforge.net/ -->
+<!-- Discord: https://discord.gg/UvedJ9m -->

.github/ISSUE_TEMPLATE/issue_report.md

@@ -11,7 +11,6 @@ assignees: ''
 
 <!-- For support with crashes and issues, please create a post on the forum instead: -->
 <!-- https://www.minecraftforge.net/forum/forum/18-support-bug-reports/ -->
-<!-- You can also use the discord for support, https://discord.minecraftforge.net/ -->
 
 **Minecraft Version:** {Minecraft version}
 

.github/workflows/publish.yml

@@ -1,28 +0,0 @@
-name: Publish
-
-on:
-  push:
-    branches: [ '1.21.11' ]
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-    uses: MinecraftForge/SharedActions/.github/workflows/gradle.yml@main
-    with:
-      java: 21
-      gradle_setup: './gradlew setup'
-      gradle_tasks: 'build publish'
-      artifact_name: 'forge'
-    secrets:
-      DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
-      PROMOTE_ARTIFACT_WEBHOOK: ${{ secrets.PROMOTE_ARTIFACT_WEBHOOK }}
-      PROMOTE_ARTIFACT_USERNAME: ${{ secrets.PROMOTE_ARTIFACT_USERNAME }}
-      PROMOTE_ARTIFACT_PASSWORD: ${{ secrets.PROMOTE_ARTIFACT_PASSWORD }}
-      MAVEN_USER: ${{ secrets.MAVEN_USER }}
-      MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
-      SIGN_KEY_ALIAS: ${{ secrets.SIGN_KEY_ALIAS }}
-      SIGN_KEY_PASSWORD: ${{ secrets.SIGN_KEY_PASSWORD }}
-      SIGN_KEYSTORE_PASSWORD: ${{ secrets.SIGN_KEYSTORE_PASSWORD }}
-      SIGN_KEYSTORE_DATA: ${{ secrets.SIGN_KEYSTORE_DATA }}

.github/workflows/pull_request_review.yml

@@ -7,7 +7,7 @@ jobs:
     name: Upload payload
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/upload-artifact@v4 # Payload artifact is consumed in Actionable
+      - uses: actions/upload-artifact@v3 # Payload artifact is consumed in Actionable
         with:
           name: payload
           path: ${{ github.event_path }}

.github/workflows/pull_request_review_comment.yml

@@ -7,7 +7,7 @@ jobs:
     name: Upload payload
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/upload-artifact@v4 # Payload artifact is consumed in Actionable
+      - uses: actions/upload-artifact@v3 # Payload artifact is consumed in Actionable
         with:
           name: payload
           path: ${{ github.event_path }}

.gitignore

@@ -1,6 +1,3 @@
-#forgedev dev if the folder exists in here
-forgedev
-
 #eclipse
 **/bin
 **/.settings
@@ -16,21 +13,18 @@ forgedev
 /classes
 *.iml
 
-# We however WANT the ide folder as it has tempaltes/configs for developing Forge.
-!ide/**
-
 #gradle
 /build
 /.gradle
 /*/build
 /*/.gradle
 
-# Minecraft
-/run
-/*.launch
-
 # Projects repo, either ignore it, or ignore patches.
-src/minecraft
+/projects/mcp/
+/projects/clean/
+/projects/forge/
+/projects/fmlonly/
+#/patches/*
 
 #occupational hazards
 /projects/**/build/
@@ -38,21 +32,18 @@ src/minecraft
 /projects/**/run/
 /projects/**/*.launch
 /repo/
-src/*/generated/**/.cache/
+src/generated/resources/.cache/
+src/generated_test/resources/.cache/
+src/generated_mdk/resources/.cache/
 
-# Generated by gradle every import
-**/src/main/resources/META-INF/MANIFEST.MF
-/fmlloader/src/main/resources/forge_version.json
+#Patch rejects
+#/patches-/
+#*.patch.rej
+#/projects/*/rejects/
 
-/ForgeRoot.ipr
-/ForgeRoot.iws
+# FML changelog
+changelog.txt
+*.py
+*.7z
+/logs/
 
-# APT stuff
-/*/.gitignore
-/*/.factorypath
-/*/.apt_generated/
-/lib/
-/_actual/
-/runs/
-/forge.ipr
-/forge.iws

.teamcity/pom.xml

@@ -0,0 +1,104 @@
+<?xml version="1.0"?>
+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <name>MinecraftForge_Forge Config DSL Script</name>
+  <groupId>MinecraftForge_Forge</groupId>
+  <artifactId>MinecraftForge_Forge_dsl</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <parent>
+    <groupId>org.jetbrains.teamcity</groupId>
+    <artifactId>configs-dsl-kotlin-parent</artifactId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+
+  <repositories>
+    <repository>
+      <id>jetbrains-all</id>
+      <url>https://download.jetbrains.com/teamcity-repository</url>
+      <snapshots>
+        <enabled>true</enabled>
+      </snapshots>
+    </repository>
+    <repository>
+      <id>teamcity-server</id>
+      <url>https://teamcity.minecraftforge.net/app/dsl-plugins-repository</url>
+      <snapshots>
+        <enabled>true</enabled>
+      </snapshots>
+    </repository>
+  </repositories>
+
+  <pluginRepositories>
+    <pluginRepository>
+      <id>JetBrains</id>
+      <url>https://download.jetbrains.com/teamcity-repository</url>
+    </pluginRepository>
+  </pluginRepositories>
+
+  <build>
+    <sourceDirectory>${basedir}</sourceDirectory>
+    <plugins>
+      <plugin>
+        <artifactId>kotlin-maven-plugin</artifactId>
+        <groupId>org.jetbrains.kotlin</groupId>
+        <version>${kotlin.version}</version>
+
+        <configuration/>
+        <executions>
+          <execution>
+            <id>compile</id>
+            <phase>process-sources</phase>
+            <goals>
+              <goal>compile</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>test-compile</id>
+            <phase>process-test-sources</phase>
+            <goals>
+              <goal>test-compile</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.jetbrains.teamcity</groupId>
+        <artifactId>teamcity-configs-maven-plugin</artifactId>
+        <version>${teamcity.dsl.version}</version>
+        <configuration>
+          <format>kotlin</format>
+          <dstDir>target/generated-configs</dstDir>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.jetbrains.teamcity</groupId>
+      <artifactId>configs-dsl-kotlin</artifactId>
+      <version>${teamcity.dsl.version}</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.jetbrains.teamcity</groupId>
+      <artifactId>configs-dsl-kotlin-plugins</artifactId>
+      <version>1.0-SNAPSHOT</version>
+      <type>pom</type>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.jetbrains.kotlin</groupId>
+      <artifactId>kotlin-stdlib-jdk8</artifactId>
+      <version>${kotlin.version}</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.jetbrains.kotlin</groupId>
+      <artifactId>kotlin-script-runtime</artifactId>
+      <version>${kotlin.version}</version>
+      <scope>compile</scope>
+    </dependency>
+  </dependencies>
+</project>

.teamcity/settings.kts

@@ -0,0 +1,208 @@
+import jetbrains.buildServer.configs.kotlin.v2019_2.*
+import jetbrains.buildServer.configs.kotlin.v2019_2.projectFeatures.githubIssues
+import jetbrains.buildServer.configs.kotlin.*
+import jetbrains.buildServer.configs.kotlin.v2019_2.buildSteps.gradle
+
+/*
+The settings script is an entry point for defining a TeamCity
+project hierarchy. The script should contain a single call to the
+project() function with a Project instance or an init function as
+an argument.
+
+VcsRoots, BuildTypes, Templates, and subprojects can be
+registered inside the project using the vcsRoot(), buildType(),
+template(), and subProject() methods respectively.
+
+To debug settings scripts in command-line, run the
+
+    mvnDebug org.jetbrains.teamcity:teamcity-configs-maven-plugin:generate
+
+command and attach your debugger to the port 8000.
+
+To debug in IntelliJ Idea, open the 'Maven Projects' tool window (View
+-> Tool Windows -> Maven Projects), find the generate task node
+(Plugins -> teamcity-configs -> teamcity-configs:generate), the
+'Debug' option is available in the context menu for the task.
+*/
+
+version = "2021.2"
+
+project {
+
+    buildType(Build)
+    buildType(BuildSecondaryBranches)
+    buildType(PullRequests)
+    buildType(PullRequestChecks)
+    buildType(PullRequestCompatibility)
+
+    params {
+        text("docker_jdk_version", "17", label = "Gradle version", description = "The version of the JDK to use during execution of tasks in a JDK.", display = ParameterDisplay.HIDDEN, allowEmpty = false)
+        text("docker_gradle_version", "7.5.1", label = "Gradle version", description = "The version of Gradle to use during execution of Gradle tasks.", display = ParameterDisplay.HIDDEN, allowEmpty = false)
+        text("git_main_branch", "1.20.x", label = "Git Main Branch", description = "The git main or default branch to use in VCS operations.", display = ParameterDisplay.HIDDEN, allowEmpty = false)
+        text("git_branch_spec", """
+                +:refs/heads/(main*)
+                +:refs/heads/(master*)
+                +:refs/heads/(develop|release|staging|main|master)
+                +:refs/heads/(1.*)
+            """.trimIndent(), label = "The branch specification of the repository", description = "By default all main branches are build by the configuration. Modify this value to adapt the branches build.", display = ParameterDisplay.HIDDEN, allowEmpty = true)
+        text("github_repository_name", "MinecraftForge", label = "The github repository name. Used to connect to it in VCS Roots.", description = "This is the repository slug on github. So for example `MinecraftForge` or `MinecraftForge`. It is interpolated into the global VCS Roots.", display = ParameterDisplay.HIDDEN, allowEmpty = false)
+        text("env.PUBLISHED_JAVA_ARTIFACT_ID", "forge", label = "Published artifact id", description = "The maven coordinate artifact id that has been published by this build. Can not be empty.", allowEmpty = false)
+        text("env.PUBLISHED_JAVA_FML_ARTIFACT_ID", "fmlonly", label = "Published fmlonly artifact id", description = "The maven coordinate artifact id for fml only that has been published by this build. Can not be empty.", allowEmpty = false)
+        text("env.PUBLISHED_JAVA_FML_ARTIFACT_VERSION", "0.0.0-SNAPSHOT", label = "Published fmlonly artifact version", description = "The version for fml only that has been published by this build. Can not be empty.", allowEmpty = false)
+        text("env.PUBLISHED_JAVA_GROUP", "net.minecraftforge", label = "Published group", description = "The maven coordinate group that has been published by this build. Can not be empty.", allowEmpty = false)
+        //These are references and not actually keys
+        password("env.CROWDIN_KEY", "credentialsJSON:a3102dbe-805d-4177-9f54-3d2c2eb08fd5", display = ParameterDisplay.HIDDEN)
+        password("env.KEYSTORE_URL", "credentialsJSON:a7ae1c82-8058-4061-8d12-7f6bc2618d2e", display = ParameterDisplay.HIDDEN)
+        password("env.KEYSTORE_PASSWORD", "credentialsJSON:d7b964e3-a1fd-47a8-b892-6f601fe47479", display = ParameterDisplay.HIDDEN)
+        text("additional_publishing_gradle_parameters", "-PcrowdinKey=%env.CROWDIN_KEY% -PkeystoreKeyPass=%env.KEYSTORE_PASSWORD% -PkeystoreStorePass=%env.KEYSTORE_PASSWORD% -Pkeystore=%env.KEYSTORE_URL%", label = "Additional gradle parameters for publish", description = "Contains the additional gradle parameters used during publishing.", display = ParameterDisplay.HIDDEN, allowEmpty = true)
+
+        checkbox("should_execute_build", "false", label = "Should build", description = "Indicates if the build task should be executed.", display = ParameterDisplay.HIDDEN,
+            checked = "true", unchecked = "false")
+        checkbox("should_execute_test", "false", label = "Should build", description = "Indicates if the build task should be executed.", display = ParameterDisplay.HIDDEN,
+            checked = "true", unchecked = "false")
+    }
+
+    features {
+        githubIssues {
+            id = "MinecraftForge_MinecraftForge__IssueTracker"
+            displayName = "MinecraftForge/MinecraftForge"
+            repositoryURL = "https://github.com/MinecraftForge/MinecraftForge"
+        }
+    }
+}
+
+object Build : BuildType({
+    templates(AbsoluteId("MinecraftForge_SetupGradleUtilsCiEnvironmen"), AbsoluteId("MinecraftForge_BuildWithDiscordNotifications"), AbsoluteId("MinecraftForge_BuildMainBranches"), AbsoluteId("MinecraftForge_SetupProjectUsingGradle"), AbsoluteId("MinecraftForge_BuildUsingGradle"), AbsoluteId("MinecraftForge_PublishProjectUsingGradle"), AbsoluteId("MinecraftForge_TriggersStaticFilesWebpageGenerator"))
+    id("MinecraftForge_MinecraftForge__Build")
+    name = "Build"
+    description = "Builds and Publishes the main branches of the project."
+
+    features {
+        feature {
+            id = "trigger_fml_only_files_generator"
+            type = "triggerBuildFeature"
+            param("triggers", "MinecraftForge_FilesGenerator_GeneratePages")
+            param("parameters", """
+                env.PUBLISHED_JAVA_FML_ARTIFACT_ID~env.PUBLISHED_JAVA_ARTIFACT_ID
+                env.PUBLISHED_JAVA_FML_ARTIFACT_VERSION~env.PUBLISHED_JAVA_ARTIFACT_VERSION
+                env.PUBLISHED_JAVA_GROUP
+            """.trimIndent())
+        }
+    }
+})
+
+object BuildSecondaryBranches : BuildType({
+    templates(AbsoluteId("MinecraftForge_ExcludesBuildingDefaultBranch"), AbsoluteId("MinecraftForge_SetupGradleUtilsCiEnvironmen"), AbsoluteId("MinecraftForge_BuildWithDiscordNotifications"), AbsoluteId("MinecraftForge_BuildMainBranches"), AbsoluteId("MinecraftForge_SetupProjectUsingGradle"), AbsoluteId("MinecraftForge_BuildUsingGradle"))
+    id("MinecraftForge_MinecraftForge__BuildSecondaryBranches")
+    name = "Build - Secondary Branches"
+    description = "Builds and Publishes the secondary branches of the project."
+    params {
+        text("git_branch_spec", """
+                +:refs/heads/(*)
+                -:refs/heads/noci*
+            """.trimIndent(), label = "The branch specification of the repository", description = "By default all main branches are build by the configuration. Modify this value to adapt the branches build.", display = ParameterDisplay.HIDDEN, allowEmpty = true)
+    }
+    vcs {
+        branchFilter = """
+            +:*
+            -:1.*
+            -:<default>
+        """.trimIndent()
+    }
+})
+
+object PullRequests : BuildType({
+    templates(AbsoluteId("MinecraftForge_BuildPullRequests"), AbsoluteId("MinecraftForge_SetupGradleUtilsCiEnvironmen"), AbsoluteId("MinecraftForge_BuildWithDiscordNotifications"), AbsoluteId("MinecraftForge_SetupProjectUsingGradle"), AbsoluteId("MinecraftForge_BuildUsingGradle"))
+    id("MinecraftForge_MinecraftForge__PullRequests")
+    name = "Pull Requests"
+    description = "Builds pull requests for the project"
+
+    params {
+        checkbox("should_execute_build", "true", label = "Should build", description = "Indicates if the build task should be executed.", display = ParameterDisplay.HIDDEN,
+            checked = "true", unchecked = "false")
+        text(
+            "gradle_build_task",
+            "assemble",
+            label = "Gradle build task to execute during build",
+            description = "Determines the build task that is executed to build the project.",
+            display = ParameterDisplay.HIDDEN,
+            allowEmpty = false
+        )
+    }
+
+    vcs {
+        branchFilter = """
+            +:*
+            -:1.*
+            -:<default>
+        """.trimIndent()
+    }
+})
+
+object PullRequestChecks : BuildType({
+    templates(AbsoluteId("MinecraftForge_BuildPullRequests"), AbsoluteId("MinecraftForge_SetupGradleUtilsCiEnvironmen"), AbsoluteId("MinecraftForge_BuildWithDiscordNotifications"), AbsoluteId("MinecraftForge_SetupProjectUsingGradle"))
+    id("MinecraftForge_MinecraftForge__PullRequestChecks")
+    name = "Pull Requests (Checks)"
+    description = "Checks pull requests for the project"
+
+    steps {
+        gradle {
+            name = "Check"
+            id = "RUNNER_10_Check"
+
+            tasks = "checkAll"
+            gradleParams = "--continue %gradle_custom_args%"
+            enableStacktrace = true
+            dockerImage = "%docker_gradle_image%"
+            dockerRunParameters = """
+                -v "/opt/cache/agent/gradle:/home/gradle/.gradle"
+                -v "/opt/cache/shared/gradle:/home/gradle/rocache:ro"
+                --network=host
+                -u 1000:1000
+                %docker_additional_args%
+            """.trimIndent()
+        }
+    }
+
+    vcs {
+        branchFilter = """
+            +:*
+            -:1.*
+            -:<default>
+        """.trimIndent()
+    }
+})
+
+object PullRequestCompatibility : BuildType({
+    templates(AbsoluteId("MinecraftForge_BuildPullRequests"), AbsoluteId("MinecraftForge_SetupGradleUtilsCiEnvironmen"), AbsoluteId("MinecraftForge_BuildWithDiscordNotifications"), AbsoluteId("MinecraftForge_SetupProjectUsingGradle"))
+    id("MinecraftForge_MinecraftForge__PullRequestCompatibility")
+    name = "Pull Requests (Compatibility)"
+    description = "Validates binary compatibility for pull requests made to the project"
+
+    steps {
+        gradle {
+            name = "Validate"
+            id = "RUNNER_10_Compatibility"
+
+            tasks = "checkJarCompatibility"
+            gradleParams = "--continue %gradle_custom_args%"
+            enableStacktrace = true
+            dockerImage = "%docker_gradle_image%"
+            dockerRunParameters = """
+                -v "/opt/cache/agent/gradle:/home/gradle/.gradle"
+                -v "/opt/cache/shared/gradle:/home/gradle/rocache:ro"
+                --network=host
+                -u 1000:1000
+                %docker_additional_args%
+            """.trimIndent()
+        }
+    }
+
+    vcs {
+        branchFilter = """
+            +:*
+            -:1.*
+            -:<default>
+        """.trimIndent()
+    }
+})

CREDITS.txt

@@ -0,0 +1,65 @@
+Minecraft Forge: Credits/Thank You
+
+Forge is a set of tools and modifications to the Minecraft base game code to assist 
+mod developers in creating new and exciting content. It has been in development for 
+several years now, but I would like to take this time thank a few people who have 
+helped it along it's way.
+
+First, the people who originally created the Forge projects way back in Minecraft 
+alpha. Eloraam of RedPower, and SpaceToad of Buildcraft, without their acceptiance 
+of me taking over the project, who knows what Minecraft modding would be today.
+
+Secondly, someone who has worked with me, and developed some of the core features
+that allow modding to be as functional, and as simple as it is, cpw. For developing
+FML, which stabelized the client and server modding ecosystem. As well as the base
+loading system that allows us to modify Minecraft's code as elegently as possible.
+
+Mezz, who has stepped up as the issue and pull request manager. Helping to keep me
+sane as well as guiding the community into creating better additions to Forge.
+
+Searge, Bspks, Fesh0r, ProfMobious, and all the rest over on the MCP team {of which 
+I am a part}. For creating some of the core tools needed to make Minecraft modding 
+both possible, and as stable as can be.
+  On that note, here is some specific information of the MCP data we use:
+    * Minecraft Coder Pack (MCP) *
+      Forge Mod Loader and Minecraft Forge have permission to distribute and automatically 
+      download components of MCP and distribute MCP data files. This permission is not 
+      transitive and others wishing to redistribute the Minecraft Forge source independently
+      should seek permission of MCP or remove the MCP data files and request their users 
+      to download MCP separately.
+      
+And lastly, the countless community members who have spent time submitting bug reports, 
+pull requests, and just helping out the community in general. Thank you.
+
+--LexManos
+
+=========================================================================
+
+This is Forge Mod Loader.
+
+You can find the source code at all times at https://github.com/MinecraftForge/MinecraftForge/tree/1.12.x/src/main/java/net/minecraftforge/fml
+
+This minecraft mod is a clean open source implementation of a mod loader for minecraft servers
+and minecraft clients.
+
+The code is authored by cpw.
+
+It began by partially implementing an API defined by the client side ModLoader, authored by Risugami.
+http://www.minecraftforum.net/topic/75440-
+This support has been dropped as of Minecraft release 1.7, as Risugami no longer maintains ModLoader.
+
+It also contains suggestions and hints and generous helpings of code from LexManos, author of MinecraftForge.
+http://www.minecraftforge.net/
+
+Additionally, it contains an implementation of topological sort based on that 
+published at http://keithschwarz.com/interesting/code/?dir=topological-sort
+
+It also contains code from the Maven project for performing versioned dependency
+resolution. http://maven.apache.org/
+
+It also contains a partial repackaging of the javaxdelta library from http://sourceforge.net/projects/javaxdelta/
+with credit to it's authors.
+
+Forge Mod Loader downloads components from the Minecraft Coder Pack
+(http://mcp.ocean-labs.de/index.php/Main_Page) with kind permission from the MCP team.
+

Jenkinsfile

@@ -0,0 +1,125 @@
+@Library('forge-shared-library')_
+
+pipeline {
+    options {
+        disableConcurrentBuilds()
+    }
+    agent {
+        docker {
+            image 'gradle:7-jdk16'
+            //args '-v forgegc:/home/gradle/.gradle_cache/'
+        }
+    }
+    environment {
+        GRADLE_ARGS = '--no-daemon --console=plain' // No daemon for now as FG3 kinda derps. //'-Dorg.gradle.daemon.idletimeout=5000'
+        DISCORD_WEBHOOK = credentials('forge-discord-jenkins-webhook')
+        DISCORD_PREFIX = "Job: Forge Branch: ${BRANCH_NAME} Build: #${BUILD_NUMBER}"
+        JENKINS_HEAD = 'https://wiki.jenkins-ci.org/download/attachments/2916393/headshot.png'
+    }
+
+    stages {
+        stage('notify_start') {
+            when {
+                not {
+                    changeRequest()
+                }
+            }
+            steps {
+                discordSend(
+                    title: "${DISCORD_PREFIX} Started",
+                    successful: true,
+                    result: 'ABORTED', //White border
+                    thumbnail: JENKINS_HEAD,
+                    webhookURL: DISCORD_WEBHOOK
+                )
+            }
+        }
+        /*
+        stage('pull_cache') {
+            steps {
+                sh 'cp -r /home/gradle/.gradle_cache/jdks/ /home/gradle/.gradle/jdks/'
+                sh 'cp -r /home/gradle/.gradle_cache/wrapper/ /home/gradle/.gradle/wrapper/'
+                sh 'cp -r /home/gradle/.gradle_cache/caches/ /home/gradle/.gradle/caches/'
+            }
+        }
+        */
+        stage('setup') {
+            steps {
+                withGradle {
+                    sh './gradlew ${GRADLE_ARGS} --refresh-dependencies --continue setup'
+                }
+                script {
+                    env.MYVERSION = sh(returnStdout: true, script: './gradlew :forge:properties -q | grep "^version:" | cut -d" " -f2').trim()
+                    env.FMLONLY_VERSION = sh(returnStdout: true, script: './gradlew :fmlonly:properties -q | grep "^version:" | cut -d" " -f2').trim()
+                }
+            }
+        }
+        stage('changelog') {
+            when {
+                not {
+                    changeRequest()
+                }
+            }
+            steps {
+                writeChangelog(currentBuild, 'build/changelog.txt')
+            }
+        }
+        stage('publish') {
+            when {
+                not {
+                    changeRequest()
+                }
+            }
+            environment {
+                CROWDIN = credentials('forge-crowdin')
+                KEYSTORE = credentials('forge-jenkins-keystore-old')
+                KEYSTORE_KEYPASS = credentials('forge-jenkins-keystore-old-keypass')
+                KEYSTORE_STOREPASS = credentials('forge-jenkins-keystore-old-keypass')
+            }
+            steps {
+                withCredentials([usernamePassword(credentialsId: 'maven-forge-user', usernameVariable: 'MAVEN_USER', passwordVariable: 'MAVEN_PASSWORD')]) {
+                    withGradle {
+                        sh './gradlew ${GRADLE_ARGS} publish -PkeystoreKeyPass=${KEYSTORE_KEYPASS} -PkeystoreStorePass=${KEYSTORE_STOREPASS} -Pkeystore=${KEYSTORE} -PcrowdinKey=${CROWDIN}'
+                    }
+                }
+            }
+            post {
+                success {
+                    build job: 'filegenerator', parameters: [string(name: 'COMMAND', value: "promote net.minecraftforge:forge ${env.MYVERSION} latest")], propagate: false, wait: false
+                    build job: 'filegenerator', parameters: [string(name: 'COMMAND', value: "promote net.minecraftforge:fmlonly ${env.FMLONLY_VERSION} latest")], propagate: false, wait: false
+                }
+            }
+        }
+        stage('test_publish_pr') { //Publish to local repo to test full process, but don't include credentials so it can't sign/publish to maven
+            when {
+                changeRequest()
+            }
+            environment {
+                CROWDIN = credentials('forge-crowdin')
+            }
+            steps {
+                withGradle {
+                    sh './gradlew ${GRADLE_ARGS} publish -PcrowdinKey=${CROWDIN}'
+                }
+            }
+        }
+    }
+    post {
+        always {
+            script {
+                archiveArtifacts artifacts: 'projects/forge/build/libs/**/*.*', fingerprint: true, onlyIfSuccessful: true, allowEmptyArchive: true
+
+                if (env.CHANGE_ID == null) { // This is unset for non-PRs
+                    discordSend(
+                        title: "${DISCORD_PREFIX} Finished ${currentBuild.currentResult}",
+                        description: '```\n' + getChanges(currentBuild) + '\n```',
+                        successful: currentBuild.resultIsBetterOrEqualTo("SUCCESS"),
+                        result: currentBuild.currentResult,
+                        thumbnail: JENKINS_HEAD,
+                        webhookURL: DISCORD_WEBHOOK
+                    )
+                }
+            }
+        }
+    }
+}

LICENSE.txt

@@ -3,7 +3,7 @@ parts herein are licensed under the terms of the LGPL 2.1 found
 here http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt and 
 copied below.
 
-Homepage: https://minecraftforge.net/
+Homepage: http://minecraftforge.net/
           https://github.com/MinecraftForge/MinecraftForge
           
 

buildSrc/.gitignore

@@ -0,0 +1,3 @@
+/.gradle/
+/build/
+/out/

buildSrc/build.gradle

@@ -0,0 +1,13 @@
+repositories {
+    maven { url = 'https://maven.minecraftforge.net/' }
+	 mavenCentral()
+}
+
+dependencies {
+    implementation 'org.ow2.asm:asm:9.5'
+    implementation 'org.ow2.asm:asm-tree:9.5'
+    implementation 'net.minecraftforge:srgutils:0.5.+'
+    implementation 'commons-io:commons-io:2.12.0'
+    implementation 'com.google.code.gson:gson:2.10.1'
+    implementation 'org.eclipse.jgit:org.eclipse.jgit:6.5.0.202303070854-r'
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/BytecodeFinder.groovy

@@ -0,0 +1,50 @@
+package net.minecraftforge.forge.tasks
+
+import groovy.json.JsonBuilder
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.TaskAction
+import org.objectweb.asm.tree.ClassNode
+import org.objectweb.asm.tree.FieldNode
+import org.objectweb.asm.tree.MethodNode
+
+abstract class BytecodeFinder extends DefaultTask {
+    @InputFile abstract RegularFileProperty getJar()
+    // It should be fine to mark the output as internal as we want to control when we run it anyways.
+    // This also shuts Gradle 8 up about implicit task dependencies.
+    @Internal abstract RegularFileProperty getOutput()
+
+    BytecodeFinder() {
+        output.convention(project.layout.buildDirectory.dir(name).map { it.file("output.json") })
+    }
+
+    @TaskAction
+    protected void exec() {
+        Util.init()
+
+        def outputFile = output.get().asFile
+        if (outputFile.exists())
+            outputFile.delete()
+
+        pre()
+
+        Util.processClassNodes(jar.get().asFile, this::process)
+
+        post()
+        outputFile.text = new JsonBuilder(getData()).toPrettyString()
+    }
+
+
+    protected process(ClassNode node) {
+        if (node.fields != null) node.fields.each { process(node, it) }
+        if (node.methods != null) node.methods.each { process(node, it) }
+    }
+
+    protected pre() {}
+    protected process(ClassNode parent, FieldNode node) {}
+    protected process(ClassNode parent, MethodNode node) {}
+    protected post() {}
+    protected abstract Object getData()
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/BytecodePredicateFinder.groovy

@@ -0,0 +1,32 @@
+package net.minecraftforge.forge.tasks
+
+import groovy.transform.CompileStatic
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.Internal
+import org.objectweb.asm.tree.ClassNode
+import org.objectweb.asm.tree.MethodNode
+
+@CompileStatic
+abstract class BytecodePredicateFinder extends BytecodeFinder {
+
+    @Internal
+    abstract Property<Closure<Boolean>> getPredicate()
+
+    private final Set<String> matches = new HashSet()
+
+    @Override
+    protected process(ClassNode parent, MethodNode node) {
+        for (final current : node.instructions) {
+            if (predicate.get().call(parent, node, current)) {
+                matches.add(parent.name)
+                return
+            }
+        }
+    }
+
+    @Internal
+    @Override
+    protected Object getData() {
+        return matches.toSorted(Comparator.naturalOrder()) ?: {throw new RuntimeException('Failed to find any targets, please ensure that method names and descriptors are correct.')}()
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/ClosureHelper.groovy

@@ -0,0 +1,31 @@
+package net.minecraftforge.forge.tasks
+
+import java.util.function.BiConsumer
+
+public class ClosureHelper {
+    BiConsumer<String, Closure> callback
+    
+    public ClosureHelper(Closure cl, BiConsumer<String, Closure> callback) {
+        this.callback = callback
+        apply(this, cl)
+    }
+    
+    
+    def methodMissing(String name, Object args) {
+        if (!args.class.isArray()) return
+        Object[] aargs = (Object[])args
+        
+        if (aargs.length == 1 && aargs[0] instanceof Closure) {
+            this.callback.accept(name, (Closure)aargs[0])
+        } else {
+            throw new IllegalArgumentException('Unknown method: "' + name + '" with arguments ' + args + ' for ' + this)
+        }
+    }
+    
+    static <T> T apply(T obj, Closure cl) {
+        cl.delegate = obj
+        cl.resolveStrategy = Closure.DELEGATE_FIRST
+        cl()
+        return obj
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/Crowdin.groovy

@@ -0,0 +1,73 @@
+package net.minecraftforge.forge.tasks
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.Optional
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.TaskAction
+
+import java.util.zip.ZipEntry
+import java.util.zip.ZipInputStream
+import java.util.zip.ZipOutputStream
+
+abstract class Crowdin extends DefaultTask {
+    @Input abstract Property<String> getId()
+	@Input @Optional abstract Property<String> getKey()
+	@Input boolean json = true
+	@OutputFile abstract RegularFileProperty getOutput()
+	@OutputFile abstract RegularFileProperty getExport()
+
+    Crowdin() {
+		outputs.upToDateWhen{ false }
+		id.convention('minecraft-forge')
+		output.convention(project.layout.buildDirectory.dir(name).map {it.file("output.zip") })
+		export.convention(project.layout.buildDirectory.dir(name).map {it.file("export.json") })
+	}
+
+    @TaskAction
+    def run() {
+		File outputFile = output.get().asFile
+		File exportFile = export.get().asFile
+		if (outputFile.exists())
+			outputFile.delete()
+		
+		if (!key.isPresent())
+			return
+		String key = this.key.get()
+		String id = this.id.get()
+		
+		// Force an export
+		new URL("https://api.crowdin.com/api/project/${id}/export?key=${key}").withInputStream { i ->
+			exportFile.withOutputStream { it << i }
+		}
+		
+		if (!exportFile.text.contains('success')) {
+			throw new RuntimeException("Crowdin export failed, see ${exportFile} for more info")
+		}
+
+		new URL("https://api.crowdin.com/api/project/${id}/download/all.zip?key=${key}").withInputStream { i -> 
+			new ZipInputStream(i).withCloseable { zin ->
+				outputFile.withOutputStream { out ->
+					new ZipOutputStream(out).withCloseable { zout -> 
+						ZipEntry zein
+						while ((zein = zin.nextEntry) != null) {
+							if (zein.isDirectory()) {
+								zout.putNextEntry(new ZipEntry(zein.name))
+							} else {
+								// 1.13+ uses json
+								if (zein.name.endsWith('.json') == json) {
+									ZipEntry zeout = new ZipEntry(json ? zein.name.toLowerCase() : zein.name)
+									zeout.time = 1
+									zout.putNextEntry(zeout)
+									zout << zin
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/DownloadLibraries.groovy

@@ -0,0 +1,54 @@
+package net.minecraftforge.forge.tasks
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.Internal
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.OutputFiles
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.OutputDirectory
+
+import java.nio.file.Files
+
+abstract class DownloadLibraries extends DefaultTask {
+	@InputFile abstract RegularFileProperty getInput()
+	@OutputDirectory abstract DirectoryProperty getOutput()
+	@OutputFile abstract RegularFileProperty getLibrariesOutput()
+
+    DownloadLibraries() {
+		output.convention(project.layout.buildDirectory.dir(name))
+        librariesOutput.convention(project.layout.buildDirectory.dir(name).map(d -> d.file('libraries.txt')))
+	}
+
+    @TaskAction
+    def run() {
+		Util.init()
+		File outputDir = output.get().asFile
+        def libraries = new ArrayList()
+
+		def json = input.get().asFile.json().libraries.each { lib ->
+		    //TODO: Thread?
+			def artifacts = [lib.downloads.artifact] + lib.downloads.get('classifiers', [:]).values()
+			artifacts.each{ art -> 
+				def target = new File(outputDir, art.path)
+				libraries.add(target.absolutePath)
+				if (!target.exists() || !art.sha1.equals(target.sha1())) {
+					project.logger.lifecycle("Downloading ${art.url}")
+					if (!target.parentFile.exists()) {
+						target.parentFile.mkdirs()
+					}
+					new URL(art.url).withInputStream { i ->
+						target.withOutputStream { it << i }
+					}
+					if (!art.sha1.equals(target.sha1())) {
+						throw new IllegalStateException("Failed to download ${art.url} to ${target.canonicalPath} SHA Mismatch")
+					}
+				}
+			}
+		}
+        Files.write(librariesOutput.get().asFile.toPath(), libraries)
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/FieldCompareFinder.groovy

@@ -0,0 +1,109 @@
+package net.minecraftforge.forge.tasks
+
+import groovy.transform.EqualsAndHashCode
+
+import java.util.ArrayList
+import java.util.HashMap
+import java.util.TreeMap
+import java.util.TreeSet
+import java.util.function.BiConsumer
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.tasks.*
+
+import org.objectweb.asm.Opcodes
+import org.objectweb.asm.Type
+import org.objectweb.asm.tree.ClassNode
+import org.objectweb.asm.tree.FieldNode
+import org.objectweb.asm.tree.MethodNode
+
+import static org.objectweb.asm.Opcodes.*
+
+abstract class FieldCompareFinder extends BytecodeFinder {
+    @Nested
+    Map<String, Search> fields = [:] as HashMap
+    @Internal
+    Map<Search, String> fieldsReverse = [:] as HashMap
+    @Internal
+    Map<String, Set<ObjectTarget>> targets = [:] as TreeMap
+    
+    @Override
+    protected pre() {
+        //fields.each{ k,v -> logger.lifecycle("Fields: " + k + ' ' + v) }
+    }
+    
+    @Override
+    protected process(ClassNode parent, MethodNode node) {
+        def last = null
+        def parentInstance = new ObjectTarget(owner: parent.name, name: '', desc: '')
+        for (int x = 0; x < node.instructions.size(); x++) {
+            def current = node.instructions.get(x)
+            if (current.opcode == IF_ACMPEQ || current.opcode == IF_ACMPNE) {
+                if (last != null && (last.opcode == GETSTATIC || last.opcode == GETFIELD)) {
+                    def target = new Search(cls: last.owner, name: last.name)
+                    def wanted = fieldsReverse.get(target)
+                    def original = fields.get(wanted)
+                    def instance = new ObjectTarget(owner: parent.name, name: node.name, desc: node.desc)
+                    if (wanted != null && (original.blacklist == null || (!original.blacklist.contains(instance) && !original.blacklist.contains(parentInstance)))) {
+                        targets.computeIfAbsent(wanted, { k -> new TreeSet() }).add(instance)
+                    }
+                }
+            }
+            last = current
+        }
+    }
+    
+    @Internal
+    @Override
+    protected Object getData() {
+		def ret = [:] as HashMap
+		targets.forEach{ k, v -> 
+			def e = fields.get(k)
+			ret[k] = [
+				cls: e.cls, 
+				name: e.name, 
+				replacement: e.replacement, 
+				targets: v
+			]
+		}
+        return ret
+    }
+    
+    @EqualsAndHashCode(excludes = ['replacement', 'blacklist'])
+    public static class Search {
+        @Input
+        String cls
+        
+        @Input
+        String name
+		
+		@Input
+		String replacement
+    
+        @Nested
+        @Optional
+        Set<ObjectTarget> blacklist
+        
+        @Override
+        String toString() {
+            return cls + '.' + name
+        }
+        
+        def blacklist(def owner, def name, def desc) {
+            if (blacklist == null)
+                blacklist = new HashSet()
+            blacklist.add(new ObjectTarget(owner: owner, name: name, desc: desc))
+        }
+        def blacklist(def owner) {
+            blacklist(owner, '', '')
+        }
+    }
+    
+    def fields(Closure cl) {
+        new ClosureHelper(cl, {name, ccl ->
+            def search = ClosureHelper.apply(new Search(), ccl)
+            this.fields.put(name, search)
+            this.fieldsReverse.put(search, name)
+        })
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/FixPatchImports.groovy

@@ -0,0 +1,40 @@
+package net.minecraftforge.forge.tasks
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.tasks.InputDirectory
+import org.gradle.api.tasks.TaskAction
+
+import java.nio.file.Files
+
+abstract class FixPatchImports extends DefaultTask {
+
+    @InputDirectory abstract DirectoryProperty getClean()
+    @InputDirectory abstract DirectoryProperty getPatched()
+
+    @TaskAction
+    void run() {
+        final patchedPath = getPatched().get().asFile.toPath()
+        final cleanPath = getClean().get().asFile.toPath()
+
+        try (final var stream = Files.find(patchedPath, Integer.MAX_VALUE, (path, attr) -> path.toString().endsWith('.java'))) {
+            final itr = stream.iterator()
+            while (itr.hasNext()) {
+                final next = itr.next()
+                final clean = cleanPath.resolve(patchedPath.relativize(next).toString())
+
+                final patchedLines = Files.readAllLines(next)
+                final cleanLines = Files.readAllLines(clean)
+
+                final patchedImport = patchedLines.findLastIndexOf(2) { it.startsWith('import ') }
+                final cleanImport = cleanLines.findLastIndexOf(2) { it.startsWith('import ') }
+
+                if (cleanImport !== patchedImport) {
+                    patchedLines.removeIf {  it.startsWith('import ') }
+                    patchedLines.addAll(2, cleanLines.subList(2, cleanImport + 1))
+                    Files.write(next, patchedLines)
+                }
+            }
+        }
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/InheritanceData.groovy

@@ -0,0 +1,49 @@
+package net.minecraftforge.forge.tasks
+
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import groovy.transform.CompileStatic
+import groovy.transform.TupleConstructor
+
+@CompileStatic
+@TupleConstructor
+final class InheritanceData implements Annotatable {
+    String name
+    int access
+    String superName
+    List<String> interfaces = []
+    Map<String, Method> methods = [:]
+    Map<String, Field> fields = [:]
+    List<Annotation> annotations = []
+
+    @TupleConstructor
+    static final class Method implements Annotatable {
+        int access
+        String override
+        List<Annotation> annotations = []
+    }
+
+    @TupleConstructor
+    static final class Field implements Annotatable {
+        int access
+        String desc
+        List<Annotation> annotations = []
+    }
+
+    @TupleConstructor
+    static final class Annotation {
+        String desc
+    }
+
+    private static final Gson GSON = new Gson()
+    static Map<String, InheritanceData> parse(File file) {
+        try (final reader = file.newReader()) {
+            return GSON.fromJson(reader, new TypeToken<Map<String, InheritanceData>>() {})
+        }
+    }
+}
+
+@CompileStatic
+interface Annotatable {
+    List<InheritanceData.Annotation> getAnnotations()
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/InstallerJar.groovy

@@ -0,0 +1,44 @@
+package net.minecraftforge.forge.tasks
+
+import org.gradle.api.tasks.bundling.Zip
+import org.gradle.api.tasks.*
+import org.gradle.api.provider.SetProperty
+
+abstract class InstallerJar extends Zip {
+    @Input @Optional abstract SetProperty<String> getPackedDependencies()
+
+    InstallerJar() {
+        archiveClassifier.set('installer')
+        archiveExtension.set('jar') // Needs to be Zip task to not override Manifest, so set extension
+        destinationDirectory.set(project.layout.buildDirectory.dir('libs'))
+
+        def installerJson = project.tasks.installerJson
+        def launcherJson = project.tasks.launcherJson
+        def downloadInstaller = project.tasks.downloadInstaller
+
+        dependsOn(installerJson, launcherJson, downloadInstaller)
+        from(installerJson, launcherJson)
+
+        from(project.rootProject.file('/src/main/resources/url.png'))
+        project.afterEvaluate {
+            from(project.zipTree(downloadInstaller.output)) {
+                duplicatesStrategy = 'exclude'
+            }
+
+            if (!System.env.TEAMCITY_VERSION) {
+                dependsOn(project.universalJar)
+                from(project.universalJar) {
+                    into '/maven/' + project.group.replace('.', '/') + '/' + project.universalJar.archiveBaseName.get() + '/' + project.version + '/'
+                }
+
+                packedDependencies.get().forEach {
+                    def jarTask = project.rootProject.getTasks().findByPath(it)
+                    dependsOn(jarTask)
+                    from(jarTask) {
+                        into '/maven/' + jarTask.project.group.replace('.', '/') + '/' + jarTask.archiveBaseName.get() + '/' + jarTask.project.version + '/'
+                    }
+                }
+            }
+        }
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/InstallerJson.groovy

@@ -0,0 +1,81 @@
+package net.minecraftforge.forge.tasks
+
+import groovy.json.JsonBuilder
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.Property
+import org.gradle.api.provider.SetProperty
+import org.gradle.api.tasks.*
+
+import java.nio.file.Files
+
+abstract class InstallerJson extends DefaultTask {
+    @OutputFile abstract RegularFileProperty getOutput()
+    @InputFiles abstract ConfigurableFileCollection getInput()
+    @Input @Optional abstract SetProperty<String> getPackedDependencies()
+    @Input @Optional final Map<String, Object> libraries = new LinkedHashMap<>()
+    @Input Map<String, Object> json = new LinkedHashMap<>()
+    @InputFile abstract RegularFileProperty getIcon()
+    @Input abstract Property<String> getLauncherJsonName()
+    @Input abstract Property<String> getLogo()
+    @Input abstract Property<String> getMirrors()
+    @Input abstract Property<String> getWelcome()
+
+    InstallerJson() {
+        getLauncherJsonName().convention('/version.json')
+        getLogo().convention('/big_logo.png')
+        getMirrors().convention('https://files.minecraftforge.net/mirrors-2.0.json')
+        getWelcome().convention("Welcome to the simple ${project.name.capitalize()} installer.")
+                
+        getOutput().convention(project.layout.buildDirectory.file('install_profile.json'))
+
+        ['client', 'server'].each { side ->
+            ['slim', 'extra'].each { type ->
+                def tsk = project.tasks.getByName("download${side.capitalize()}${type.capitalize()}")
+                dependsOn(tsk)
+                input.from(tsk.output)
+            }
+            def tsk = project.tasks.getByName("create${side.capitalize()}SRG")
+            dependsOn(tsk)
+            input.from(tsk.output)
+        }
+
+        
+        project.afterEvaluate {
+            (packedDependencies.get().collect{ project.rootProject.tasks.findByPath(it) } + [project.universalJar]).forEach {
+                dependsOn(it)
+                input.from it.archiveFile
+            }
+        }
+    }
+
+    @TaskAction
+    protected void exec() {
+        def libs = libraries
+        for (def child : packedDependencies.get().collect{ project.rootProject.tasks.findByPath(it) } + [project.universalJar]) {
+            def dep = Util.getMavenDep(child)
+            def path = Util.getMavenPath(child)
+            libs.put(dep.toString(), [
+                name: dep,
+                downloads: [
+                    artifact: [
+                        path: path,
+                        url: "https://maven.minecraftforge.net/${path}",
+                        sha1: child.archiveFile.get().asFile.sha1(),
+                        size: child.archiveFile.get().asFile.length()
+                    ]
+                ]
+            ])
+        }
+        json.libraries = libs.values().sort{a,b -> a.name.compareTo(b.name)}
+        json.icon = "data:image/png;base64," + new String(Base64.getEncoder().encode(Files.readAllBytes(icon.get().asFile.toPath())))
+        json.json = launcherJsonName.get()
+        json.logo = logo.get()
+        if (!mirrors.get().isEmpty())
+            json.mirrorList = mirrors.get()
+        json.welcome = welcome.get()
+
+        Files.writeString(output.get().getAsFile().toPath(), new JsonBuilder(json).toPrettyString())
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/LauncherJson.groovy

@@ -0,0 +1,74 @@
+package net.minecraftforge.forge.tasks
+
+import groovy.json.JsonBuilder
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.SetProperty
+import org.gradle.api.tasks.*
+
+import java.nio.file.Files
+
+import static net.minecraftforge.forge.tasks.Util.getArtifacts
+import static net.minecraftforge.forge.tasks.Util.iso8601Now
+
+abstract class LauncherJson extends DefaultTask {
+    @OutputFile abstract RegularFileProperty getOutput()
+    @InputFiles abstract ConfigurableFileCollection getInput()
+    @Input Map<String, Object> json = new LinkedHashMap<>()
+    @Input @Optional abstract SetProperty<String> getPackedDependencies()
+    
+    @Internal final vanilla = project.project(':mcp').file('build/mcp/downloadJson/version.json')
+    @Internal final timestamp = iso8601Now()
+    @Internal final comment = [
+        "Please do not automate the download and installation of Forge.",
+        "Our efforts are supported by ads from the download page.",
+        "If you MUST automate this, please consider supporting the project through https://www.patreon.com/LexManos/"
+    ]
+    @Internal final id = "${project.rootProject.ext.MC_VERSION}-${project.name}${project.version.substring(project.rootProject.ext.MC_VERSION.length())}"
+
+    LauncherJson() {
+        getOutput().convention(project.layout.buildDirectory.file('version.json'))
+
+        dependsOn(':fmlloader:jar', 'universalJar')
+        getInput().from(project.tasks.universalJar.archiveFile,
+                project.project(':fmlloader').jar.archiveFile,
+                vanilla)
+                
+        project.afterEvaluate {
+            packedDependencies.get().forEach {
+                def jarTask = project.rootProject.tasks.findByPath(it)
+                dependsOn(jarTask)
+                input.from jarTask.archiveFile
+            }
+        }
+    }
+
+    @TaskAction
+    protected void exec() {
+        if (!json.libraries)
+            json.libraries = []
+        def libs = [:]
+        getArtifacts(project, project.configurations.installer, false).each { key, lib -> libs[key] = lib }
+        getArtifacts(project, project.configurations.moduleonly, false).each { key, lib -> libs[key] = lib }
+
+        packedDependencies.get().collect{ project.rootProject.tasks.findByPath(it) }.forEach {
+            def path = Util.getMavenPath(it)
+            def key = Util.getMavenDep(it)
+            
+            libs[key] = [
+                name: key,
+                downloads: [
+                    artifact: [
+                        path: path,
+                        url: "https://maven.minecraftforge.net/${path}",
+                        sha1: it.archiveFile.get().asFile.sha1(),
+                        size: it.archiveFile.get().asFile.length()
+                    ]
+                ]
+            ]
+        }
+        libs.each { key, lib -> json.libraries.add(lib) }
+        Files.writeString(output.get().asFile.toPath(), new JsonBuilder(json).toPrettyString())
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/MergeJars.groovy

@@ -0,0 +1,44 @@
+package net.minecraftforge.forge.tasks
+
+import org.apache.commons.io.IOUtils
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFiles
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.TaskAction
+
+import java.util.zip.ZipEntry
+import java.util.zip.ZipInputStream
+import java.util.zip.ZipOutputStream
+
+abstract class MergeJars extends DefaultTask {
+    MergeJars() {
+        output.convention(project.layout.buildDirectory.dir(name).map { it.file('output.jar') })
+    }
+
+    @TaskAction
+    void run() {
+        def jars = inputJars.files
+
+        try (ZipOutputStream zout = new ZipOutputStream(new FileOutputStream(output.get().asFile))) {
+            for (def jar : jars) {
+                try (ZipInputStream zin = new ZipInputStream(new FileInputStream(jar))) {
+                    def entry
+                    while ((entry = zin.getNextEntry()) != null) {
+                        ZipEntry _new = new ZipEntry(entry.getName())
+                        _new.setTime(0) //SHOULD be the same time as the main entry, but NOOOO _new.setTime(entry.getTime()) throws DateTimeException, so you get 0, screw you!
+                        zout.putNextEntry(_new)
+                        IOUtils.copy(zin, zout)
+                    }
+                }
+            }
+        }
+    }
+
+    @InputFiles
+    abstract ConfigurableFileCollection getInputJars()
+
+    @OutputFile
+    abstract RegularFileProperty getOutput()
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/ObjectTarget.groovy

@@ -0,0 +1,32 @@
+package net.minecraftforge.forge.tasks
+
+import groovy.transform.EqualsAndHashCode
+
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.Nested
+import org.gradle.api.tasks.Optional
+
+@EqualsAndHashCode
+public class ObjectTarget implements Comparable<ObjectTarget> {
+    @Input
+    String owner
+    
+    @Input
+    String name
+    
+    @Input
+    @Optional
+    String desc
+    
+    @Override
+    String toString() {
+        if (desc == null)
+            return owner + '.' + name
+        return owner + '.' + name + desc
+    }
+    
+    @Override
+    int compareTo(ObjectTarget o) {
+        return toString().compareTo(o.toString())
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/SetupCheckJarCompatibility.groovy

@@ -0,0 +1,57 @@
+package net.minecraftforge.forge.tasks
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.artifacts.Dependency
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.Optional
+import org.gradle.api.tasks.OutputFile
+import org.gradle.api.tasks.TaskAction
+
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
+
+abstract class SetupCheckJarCompatibility extends DefaultTask {
+    SetupCheckJarCompatibility() {
+        group = 'jar compatibility'
+        onlyIf {
+            inputVersion.getOrNull() != null
+        }
+        outputs.upToDateWhen { false } // Never up to date, because this setup task should always run
+
+        baseBinPatchesOutput.convention(project.layout.buildDirectory.dir(name).map { it.file('joined.lzma') })
+    }
+
+    @TaskAction
+    void run() {
+        def inputVersion = inputVersion.get()
+        def fmlLibs = project.configurations.detachedConfiguration(project.PACKED_DEPS.collect {
+            def artifactId = it.split(':')[1]
+            return project.dependencies.create("net.minecraftforge:${artifactId}:${inputVersion}")
+        }.toArray(Dependency[]::new))
+
+        project.tasks.named('checkJarCompatibility') {
+            baseLibraries.from(project.provider {
+                fmlLibs.resolvedConfiguration.lenientConfiguration.files
+            })
+        }
+
+        def baseForgeUserdev = project.layout.buildDirectory.dir(name).map { it.file("forge-${inputVersion}-userdev.jar") }.get().asFile
+        project.rootProject.extensions.download.run {
+            src "https://maven.minecraftforge.net/net/minecraftforge/forge/${inputVersion}/forge-${inputVersion}-userdev.jar"
+            dest baseForgeUserdev
+        }
+
+        def joinedLzma = project.zipTree(baseForgeUserdev).matching { it.include('joined.lzma') }.singleFile
+
+        Files.copy(joinedLzma.toPath(), baseBinPatchesOutput.get().asFile.toPath(), StandardCopyOption.REPLACE_EXISTING)
+    }
+
+    @Input
+    @Optional
+    abstract Property<String> getInputVersion()
+
+    @OutputFile
+    abstract RegularFileProperty getBaseBinPatchesOutput()
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/TeamcityRequests.groovy

@@ -0,0 +1,74 @@
+package net.minecraftforge.forge.tasks
+
+import com.google.gson.Gson
+import com.google.gson.reflect.TypeToken
+import groovy.transform.CompileStatic
+import org.eclipse.jgit.api.Git
+
+import javax.annotation.Nullable
+import java.util.stream.Collectors
+
+@CompileStatic
+class TeamcityRequests {
+    public static final Gson GSON = new Gson()
+
+    @Nullable
+    static <T> T jsonRequest(TypeToken<T> clazz, String url) throws Exception {
+        final HttpURLConnection conn = (HttpURLConnection) URI.create(url).toURL().openConnection()
+        conn.setRequestProperty('Accept', 'application/json')
+        conn.setReadTimeout(5 * 1000)
+        conn.setConnectTimeout(5 * 1000)
+        conn.connect()
+
+        if (conn.responseCode !== 200) {
+            return null
+        }
+
+        try (final InputStream is = conn.getInputStream()) {
+            GSON.fromJson(new InputStreamReader(is), clazz.getType())
+        }
+    }
+
+    @Nullable
+    static Map<String, Build> buildsByCommit() throws IOException {
+        final Map<String, Build> builds = [:]
+        jsonRequest(new TypeToken<Builds>() {}, 'https://teamcity.minecraftforge.net/guestAuth/app/rest/builds?fields=build:(revisions,number)&locator=buildType:(id:MinecraftForge_MinecraftForge_MinecraftForge_MinecraftForge__Build),defaultFilter:false,count:300,status:SUCCESS')
+                ?.build?.forEach {
+            it.revisions.revision.each { rev -> builds[rev.version] = it }
+        }
+        return builds
+    }
+
+    @Nullable
+    static String attemptFindBase(File gitPath) {
+        try (final git = Git.open(gitPath)) {
+            final Map<String, Build> buildByCommit = buildsByCommit()
+            for (final commit in git.log().setMaxCount(100).call()) {
+                // Find the first commit which was built on CI
+                final build = buildByCommit[commit.id.name]
+                if (build) {
+                    return build.number
+                }
+            }
+        } catch (Exception ignored) {}
+        return null
+    }
+
+    static final class Builds {
+        public List<Build> build
+    }
+
+    static final class Build {
+        public String number
+        public Revisions revisions
+    }
+
+    static final class Revisions {
+        public int count
+        public List<Revision> revision
+    }
+
+    static final class Revision {
+        public String version
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/Util.groovy

@@ -0,0 +1,165 @@
+package net.minecraftforge.forge.tasks
+
+import groovy.json.JsonBuilder
+import groovy.json.JsonSlurper
+import org.objectweb.asm.ClassReader
+import org.objectweb.asm.Opcodes
+import org.objectweb.asm.tree.ClassNode
+
+import java.io.File
+import java.security.MessageDigest
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.zip.ZipEntry
+import java.util.zip.ZipInputStream
+
+public class Util {
+    static final ASM_LEVEL = Opcodes.ASM9
+
+	static void init() {
+		File.metaClass.sha1 = { ->
+			MessageDigest md = MessageDigest.getInstance('SHA-1')
+			delegate.eachByte 4096, {bytes, size ->
+				md.update(bytes, 0, size)
+			}
+			return md.digest().collect {String.format "%02x", it}.join()
+		}
+        File.metaClass.getSha1 = { !delegate.exists() ? null : delegate.sha1() }
+
+		File.metaClass.json = { -> new JsonSlurper().parseText(delegate.text) }
+        File.metaClass.getJson = { return delegate.exists() ? new JsonSlurper().parse(delegate) : [:] }
+        File.metaClass.setJson = { json -> delegate.text = new JsonBuilder(json).toPrettyString() }
+
+		Date.metaClass.iso8601 = { ->
+			def format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")
+			def result = format.format(delegate)
+			return result[0..21] + ':' + result[22..-1]
+		}
+
+        String.metaClass.rsplit = { String del, int limit = -1 ->
+            def lst = new ArrayList()
+            def x = 0, idx
+            def tmp = delegate
+            while ((idx = tmp.lastIndexOf(del)) != -1 && (limit == -1 || x++ < limit)) {
+                lst.add(0, tmp.substring(idx + del.length(), tmp.length()))
+                tmp = tmp.substring(0, idx)
+            }
+            lst.add(0, tmp)
+            return lst
+        }
+	}
+
+	public static String[] getClasspath(project, libs, artifact) {
+		def ret = []
+		artifactTree(project, artifact).each { key, lib ->
+			libs[lib.name] = lib
+			if (lib.name != artifact)
+				ret.add(lib.name)
+		}
+		return ret
+	}
+
+	public static def getArtifacts(project, config, classifiers) {
+		def ret = [:]
+		config.resolvedConfiguration.resolvedArtifacts.each {
+			def art = [
+				group: it.moduleVersion.id.group,
+				name: it.moduleVersion.id.name,
+				version: it.moduleVersion.id.version,
+				classifier: it.classifier,
+				extension: it.extension,
+				file: it.file
+			]
+			def key = art.group + ':' + art.name
+			def folder = "${art.group.replace('.', '/')}/${art.name}/${art.version}/"
+			def filename = "${art.name}-${art.version}"
+			if (art.classifier != null)
+				filename += "-${art.classifier}"
+			filename += ".${art.extension}"
+			def path = "${folder}${filename}"
+			def url = "https://libraries.minecraft.net/${path}"
+			if (!checkExists(url)) {
+				url = "https://maven.minecraftforge.net/${path}"
+			}
+			ret[key] = [
+				name: "${art.group}:${art.name}:${art.version}" + (art.classifier == null ? '' : ":${art.classifier}") + (art.extension == 'jar' ? '' : "@${art.extension}"),
+				downloads: [
+					artifact: [
+						path: path,
+						url: url,
+						sha1: sha1(art.file),
+						size: art.file.length()
+					]
+				]
+			]
+		}
+		return ret
+	}
+
+    public static def getMavenPath(task) {
+        def classifier = task.archiveClassifier.get()
+        def dep = "${task.project.group}:${task.project.name}:${task.project.version}" + (classifier == '' ? '' : ':' + classifier)
+        return "${task.project.group.replace('.', '/')}/${task.project.name}/${task.project.version}/${task.project.name}-${task.project.version}".toString() + (classifier == '' ? '' : '-' + classifier) + '.jar'
+    }
+
+    public static def getMavenDep(task) {
+        def classifier = task.archiveClassifier.get()
+        return "${task.project.group}:${task.project.name}:${task.project.version}" + (classifier == '' ? '' : ':' + classifier)
+    }
+
+	public static def iso8601Now() { new Date().iso8601() }
+
+	public static def sha1(file) {
+		MessageDigest md = MessageDigest.getInstance('SHA-1')
+		file.eachByte 4096, {bytes, size ->
+			md.update(bytes, 0, size)
+		}
+		return md.digest().collect {String.format "%02x", it}.join()
+	}
+
+	private static def artifactTree(project, artifact) {
+		if (!project.ext.has('tree_resolver'))
+			project.ext.tree_resolver = 1
+		def cfg = project.configurations.create('tree_resolver_' + project.ext.tree_resolver++)
+		def dep = project.dependencies.create(artifact)
+		cfg.dependencies.add(dep)
+		def files = cfg.resolve()
+		return getArtifacts(project, cfg, true)
+	}
+
+	private static boolean checkExists(url) {
+		try {
+			def code = new URL(url).openConnection().with {
+				requestMethod = 'HEAD'
+				connect()
+				responseCode
+			}
+			return code == 200
+		} catch (Exception e) {
+			if (e.toString().contains('unable to find valid certification path to requested target'))
+				throw new RuntimeException('Failed to connect to ' + url + ': Missing certificate root authority, try updating java')
+			throw e
+		}
+	}
+
+    static String getLatestForgeVersion(mcVersion) {
+        final json = new JsonSlurper().parseText(new URL('https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json').getText('UTF-8'))
+        final ver = json.promos["$mcVersion-latest"]
+        ver === null ? null : (mcVersion + '-' + ver)
+    }
+
+    static void processClassNodes(File file, Closure process) {
+        file.withInputStream { i ->
+            new ZipInputStream(i).withCloseable { zin ->
+                ZipEntry zein
+                while ((zein = zin.nextEntry) != null) {
+                    if (zein.name.endsWith('.class')) {
+                        def node = new ClassNode(ASM_LEVEL)
+                        new ClassReader(zin).accept(node, 0)
+                        process(node)
+                    }
+                }
+            }
+        }
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/ValidateDeprecations.groovy

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) Forge Development LLC and contributors
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.forge.tasks
+
+import net.minecraftforge.srgutils.MinecraftVersion
+import org.gradle.api.DefaultTask
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.TaskAction
+import org.objectweb.asm.tree.AnnotationNode
+import org.objectweb.asm.tree.ClassNode
+
+abstract class ValidateDeprecations extends DefaultTask {
+    @InputFile
+    abstract RegularFileProperty getInput()
+
+    @Input
+    abstract Property<String> getMcVersion()
+
+    ValidateDeprecations() {
+        this.onlyIf { !System.env.TEAMCITY_VERSION }
+    }
+
+    @TaskAction
+    protected void exec() {
+        def mcVer = MinecraftVersion.from(mcVersion.get())
+        def errors = []
+
+        Util.processClassNodes(input.get().asFile) {
+            processNode(mcVer, errors, it)
+        }
+
+        if (!errors.isEmpty()) {
+            errors.forEach {
+                this.logger.error("Deprecated ${it[0]} is marked for removal in ${it[1]} but is not yet removed")
+            }
+            throw new IllegalStateException("Found deprecated members marked for removal but not yet removed in ${mcVer}; see log for details")
+        }
+    }
+
+    protected processNode(MinecraftVersion mcVer, List<String> errors, ClassNode node) {
+        node.visibleAnnotations?.each { annotation ->
+            ValidateDeprecations.processAnnotations(annotation, mcVer, errors) {
+                "class ${node.name}"
+            }
+        }
+        node.fields?.each { field ->
+            field.visibleAnnotations?.each { annotation ->
+                ValidateDeprecations.processAnnotations(annotation, mcVer, errors) {
+                    "field ${node.name}#${field.name}"
+                }
+            }
+        }
+        node.methods?.each { method ->
+            method.visibleAnnotations?.each { annotation ->
+                ValidateDeprecations.processAnnotations(annotation, mcVer, errors) {
+                    "method ${node.name}#${method.name}${method.desc}"
+                }
+            }
+        }
+    }
+
+    private static void processAnnotations(AnnotationNode annotation, MinecraftVersion mcVer, List<String> errors, Closure context) {
+        def values = annotation.values
+        if (values === null)
+            return
+        int forRemoval = values.indexOf('forRemoval')
+        int since = values.indexOf('since')
+        if (annotation.desc == 'Ljava/lang/Deprecated;' && forRemoval !== -1 && since !== -1 && values.size() >= 4 && values[forRemoval + 1] === true) {
+            def oldVersion = MinecraftVersion.from(values[since + 1])
+            def split = ValidateDeprecations.splitDots(oldVersion.toString())
+            if (split.length < 2)
+                return
+            def removeVersion = MinecraftVersion.from("${split[0]}.${split[1] + 1}")
+            if (removeVersion <= mcVer)
+                errors.add([context(), removeVersion])
+        }
+    }
+
+    private static int[] splitDots(String version) {
+        String[] pts = version.split('\\.')
+        int[] values = new int[pts.length]
+        for (int x = 0; x < pts.length; x++)
+            values[x] = Integer.parseInt(pts[x])
+        return values
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/checks/CheckATs.groovy

@@ -0,0 +1,310 @@
+package net.minecraftforge.forge.tasks.checks
+
+import groovy.transform.CompileStatic
+import groovy.transform.TupleConstructor
+import net.minecraftforge.forge.tasks.InheritanceData
+import net.minecraftforge.srgutils.IMappingFile
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.file.RegularFile
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.InputFiles
+import org.gradle.api.tasks.Optional
+import org.objectweb.asm.Opcodes
+
+@CompileStatic
+abstract class CheckATs extends CheckTask {
+
+    @InputFile abstract RegularFileProperty getInheritance()
+    @InputFiles abstract ConfigurableFileCollection getAts()
+    @InputFile @Optional abstract RegularFileProperty getMappings()
+
+    @Override
+    void check(Reporter reporter, boolean fix) {
+        final IMappingFile mappings = mappings.map { RegularFile it -> IMappingFile.load(it.asFile) }.getOrNull()
+        final inheritance = InheritanceData.parse(this.inheritance.get().asFile)
+
+        ats.each {
+            final lines = process(it, reporter, inheritance)
+            if (fix) {
+                it.text = joinBack(lines, inheritance, mappings).join('\n')
+            }
+        }
+    }
+
+    private static TreeMap<String, ATParser.Entry> process(File file, Reporter reporter, Map<String, InheritanceData> inheritance) {
+        final TreeMap<String, ATParser.Entry> lines = ATParser.parse(file.readLines(), reporter)
+        final Map<String, ATParser.Entry> constructorGroups = [:]
+
+        final itr = lines.entrySet().iterator()
+        final toRemove = []
+        while (itr.hasNext()) {
+            final next = itr.next()
+            String key = next.key
+            final entry = next.value
+            if (entry === null) continue
+
+            final binaryName = entry.cls.replaceAll('\\.', '/')
+
+            // Process Groups, this will remove any entries outside the group that is covered by the group
+            if (entry.group) {
+                final jcls = inheritance[binaryName]
+                if (jcls === null) {
+                    itr.remove()
+                    reporter.report("Invalid group: $key")
+                } else if ('*' == entry.desc) {
+                    if (!jcls.fields) {
+                        itr.remove()
+                        reporter.report("Invalid group, class has no fields: $key")
+                    } else {
+                        jcls.fields.each { field, value ->
+                            final fkey = entry.cls + ' ' + field
+                            if (accessLevel(value.access) < accessStr(entry.modifier)) {
+                                if (lines.containsKey(fkey)) {
+                                    toRemove.add(fkey)
+                                } else if (!entry.existing.contains(fkey)) {
+                                    reporter.report("Missing group entry: $fkey")
+                                }
+                                entry.children.add(fkey)
+                            } else if (lines.containsKey(fkey)) {
+                                toRemove.add(fkey)
+                                reporter.report("Found invalid group entry: $fkey")
+                            }
+                        }
+                        entry.existing.findAll { it !in entry.children }.each { println('Removed: ' + it) }
+                    }
+                } else if ('*()' == entry.desc) {
+                    if (!jcls.methods) {
+                        itr.remove()
+                        reporter.report("Invalid group, class has no methods: $key")
+                    } else {
+                        jcls.methods.each { mtd, value ->
+                            if (mtd.startsWith('<clinit>') || mtd.startsWith('lambda$')) return
+                            key = entry.cls + ' ' + mtd.replace(' ', '')
+                            if (accessLevel(value.access) < accessStr(entry.modifier)) {
+                                if (lines.containsKey(key)) {
+                                    toRemove.add(key)
+                                } else if (!entry.existing.contains(key)) {
+                                    reporter.report("Missing group entry: $key")
+                                }
+                                entry.children.add(key)
+                            } else if (lines.containsKey(key)) {
+                                toRemove.add(key)
+                                reporter.report("Found invalid group entry: $key")
+                            }
+                        }
+                        entry.existing.findAll { it !in entry.children }.each { println('Removed: ' + it) }
+                    }
+                } else if ('<init>' == entry.desc) { //Make all public non-abstract subclasses
+                    constructorGroups.put(binaryName, entry)
+                }
+            }
+
+            // Process normal lines, remove invalid and remove narrowing
+            else {
+                def jcls = inheritance.get(binaryName)
+                if (jcls === null) {
+                    itr.remove()
+                    reporter.report("Invalid: $key")
+                } else if (entry.desc == '') {
+                    if (accessLevel(jcls.access) > accessStr(entry.modifier) && (entry.comment === null || !entry.comment.startsWith('#force '))) {
+                        itr.remove()
+                        reporter.report("Invalid Narrowing: $key")
+                    }
+                } else if (!entry.desc.contains('(')) {
+                    if (!jcls.fields || !jcls.fields.containsKey(entry.desc)) {
+                        itr.remove()
+                        reporter.report("Invalid: $key")
+                    } else {
+                        final value = jcls.fields[entry.desc]
+                        if (accessLevel(value.access) > accessStr(entry.modifier) && (entry.comment === null || !entry.comment.startsWith('#force '))) {
+                            itr.remove()
+                            reporter.report("Invalid Narrowing: $key - ${entry.comment}")
+                        }
+                    }
+                } else {
+                    final jdesc = entry.desc.replace('(', ' (')
+                    if (!jcls.methods || !jcls.methods.containsKey(jdesc)) {
+                        itr.remove()
+                        reporter.report("Invalid: $key")
+                    } else {
+                        final value = jcls.methods[jdesc]
+                        if (accessLevel(value.access) > accessStr(entry.modifier) && (entry.comment === null || !entry.comment.startsWith('#force '))) {
+                            itr.remove()
+                            reporter.report("Invalid Narrowing: $key")
+                        }
+                    }
+                }
+            }
+        }
+
+        inheritance.each { tcls, value ->
+            if (!value.methods || ((value.access & Opcodes.ACC_ABSTRACT) !== 0)) return
+            String parent = tcls
+            while (parent !== null) {
+                constructorGroups[parent]?.tap { entry ->
+                    value.methods.each { mtd, v ->
+                        if (mtd.startsWith('<init>')) {
+                            final child = tcls.replaceAll('/', '\\.') + ' ' + mtd.replace(' ', '')
+                            if (accessLevel(v.access) < 3) {
+                                if (lines.containsKey(child)) {
+                                    toRemove.add(child)
+                                } else if (child !in entry.existing) {
+                                    reporter.report("Missing group entry: $child")
+                                }
+                                entry.children.add(child)
+                            } else if (lines.containsKey(child)) {
+                                toRemove.add(child)
+                                reporter.report("Found invalid group entry: $child")
+                            }
+                        }
+                    }
+                }
+                parent = inheritance[parent]?.superName
+            }
+        }
+        constructorGroups.values().each { entry -> entry.existing.findAll { it !in entry.children }.each{  reporter.report("Found invalid group entry: $it") } }
+
+        toRemove.each(lines.&remove)
+
+        return lines
+    }
+
+    private static List<String> joinBack(TreeMap<String, ATParser.Entry> lines, Map<String, InheritanceData> inheritance, IMappingFile mappings) {
+        final data = [] as List<String>
+        final remapComment = { ATParser.Entry entry ->
+            if (!mappings || !entry || !entry.desc) return null
+            final comment = entry.comment?.substring(1)?.trim()
+            final jsonCls = inheritance.get(entry.cls.replaceAll('\\.', '/'))
+            final mappingsClass = mappings?.getClass(jsonCls.name)
+            if (mappingsClass === null) return entry.comment
+            final idx = entry.desc.indexOf('(')
+
+            String mappedName = idx == -1
+                    ? mappingsClass.remapField(entry.desc)
+                    : mappingsClass.remapMethod(entry.desc.substring(0, idx), entry.desc.substring(idx))
+            if (!mappedName) return entry.comment
+            if (mappedName == '<init>')
+                mappedName = 'constructor'
+
+            if (comment?.startsWith(mappedName))
+                return '# ' + comment
+            if (comment && comment.indexOf(' ') !== -1) {
+                def split = comment.split(' - ').toList()
+                if (split[0].indexOf(' ') !== -1)
+                // The first string is more than one word, so append before it
+                    return "# ${mappedName} - ${comment}"
+                split.remove(0)
+                return "# ${mappedName} - ${String.join(' - ', split)}"
+            }
+            return '# ' + mappedName
+        }
+        lines.each { key, value ->
+            if (!value.group) {
+                def comment = remapComment.call(value)
+                data.add(value.modifier + ' ' + key + (comment ? ' ' + comment : ''))
+            } else {
+                data.add(('#group ' + value.modifier + ' ' + key + ' ' + (value.comment ?: '')).trim())
+                value.children.each {
+                    final line = value.modifier + ' ' + it
+                    final entry = ATParser.parseEntry(line)
+                    final comment = remapComment(entry)
+                    data.add(line + (comment ? ' ' + comment : ''))
+                }
+                data.add('#endgroup')
+            }
+        }
+        return data
+    }
+
+    static int accessStr(String access) {
+        if (access.endsWith('-f') || access.endsWith('+f')) return 4
+        switch (access.toLowerCase()) {
+            case 'public':    return 3
+            case 'protected': return 2
+            case 'default':   return 1
+            case 'private':   return 0
+            default:          return -1
+        }
+    }
+
+    static int accessLevel(int access) {
+        if ((access & Opcodes.ACC_PUBLIC)    !== 0) return 3
+        if ((access & Opcodes.ACC_PROTECTED) !== 0) return 2
+        if ((access & Opcodes.ACC_PRIVATE)   !== 0) return 0
+        return 1
+    }
+}
+
+@CompileStatic
+class ATParser {
+    static TreeMap<String, Entry> parse(List<String> lines, CheckTask.Reporter reporter) {
+        TreeMap<String, Entry> outLines = new TreeMap<>()
+        Entry group = null
+        for (final line : lines) {
+            if (line.isEmpty()) continue
+            if (line.startsWith('#group ')) {
+                final entry = parseEntry(line.substring(7))
+
+                if (entry.desc != '*' && entry.desc != '*()' && entry.desc != '<init>') {
+                    reporter.report("Invalid group: $line", false)
+                }
+
+                entry.group = true
+                entry.children = []
+                entry.existing = []
+
+                group = entry
+
+                if (outLines.containsKey(entry.key)) {
+                    reporter.report("Duplicate group: $line", false)
+                }
+
+                outLines[entry.key] = group
+            } else if (group !== null) {
+                if (line.startsWith('#endgroup')) {
+                    group = null
+                } else {
+                    final key = parseEntry(line).key
+                    group.existing.add(key)
+                }
+            } else if (line.startsWith('#endgroup')) {
+                reporter.report("Invalid group ending: $line", false)
+            } else if (line.startsWith('#')) {
+                //Nom
+            } else {
+                final entry = parseEntry(line)
+                if (outLines.containsKey(entry.key)) {
+                    reporter.report("Found duplicate: $line")
+                    continue
+                }
+                outLines[entry.key] = entry
+            }
+        }
+        return outLines
+    }
+
+    static Entry parseEntry(String line) {
+        final idx = line.indexOf('#')
+        final String comment = idx === -1 ? null : line.substring(idx)
+        if (idx !== -1) line = line.substring(0, idx - 1)
+        final data = (line.trim() + '     ').split(' ', -1)
+        new Entry(data[0], data[1], data[2], comment)
+    }
+
+    @TupleConstructor
+    static final class Entry {
+        String modifier, cls, desc, comment
+
+        Set<String> existing
+        TreeSet<String> children
+        boolean group = false
+
+        @Lazy
+        String key = {cls + (desc.isEmpty() ? '' : ' ' + desc)}()
+
+        Object getAt(String key) {
+            return getProperty(key)
+        }
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/checks/CheckExcs.groovy

@@ -0,0 +1,93 @@
+package net.minecraftforge.forge.tasks.checks
+
+import net.minecraftforge.forge.tasks.Util
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.InputFiles
+import org.objectweb.asm.ClassReader
+import org.objectweb.asm.ClassVisitor
+import org.objectweb.asm.MethodVisitor
+import org.objectweb.asm.Type
+
+import java.util.zip.ZipEntry
+import java.util.zip.ZipInputStream
+
+abstract class CheckExcs extends CheckTask {
+
+    @InputFile abstract RegularFileProperty getBinary()
+    @InputFiles abstract ConfigurableFileCollection getExcs()
+
+    @Override
+    void check(Reporter reporter, boolean fix) {
+        final Set<String> known = []
+        collectKnown(known)
+
+        excs.each { f ->
+            final lines = []
+            f.eachLine { line ->
+                def idx = line.indexOf('#')
+                if (idx == 0 || line.isEmpty()) {
+                    return
+                }
+
+                if (idx != -1) line = line.substring(0, idx - 1)
+
+                if (!line.contains('=')) {
+                    reporter.report("Invalid: $line")
+                    return
+                }
+
+                def (String key, String value) = line.split('=', 2)
+                if (!known.contains(key)) {
+                    reporter.report("Unknown: $line")
+                    return
+                }
+
+                String desc = key.split('\\.', 2)[1]
+                if (!desc.contains('(')) {
+                    reporter.report("Invalid: $line")
+                    return
+                }
+                desc = '(' + desc.split('\\(', 2)[1]
+
+                def (exceptions, String args) = value.contains('|') ? value.split('|', 2) : [value, '']
+
+                if (args.split(',').length !== Type.getArgumentTypes(desc).length) {
+                    reporter.report("Invalid: $line")
+                    return
+                }
+                lines.add(line)
+            }
+
+            if (fix) f.text = lines.sort().join('\n')
+        }
+    }
+
+    private void collectKnown(Collection<String> known) {
+        binary.get().asFile.withInputStream { i ->
+            new ZipInputStream(i).withCloseable { zin ->
+                final visitor = new ClassVisitor(Util.ASM_LEVEL) {
+                    private String cls
+                    @Override
+                    void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
+                        this.cls = name
+                    }
+
+                    @Override
+                    MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {
+                        known.add(this.cls + '.' + name + descriptor)
+                        super.visitMethod(access, name, descriptor, signature, exceptions)
+                    }
+                }
+                ZipEntry zein
+                while ((zein = zin.nextEntry) !== null) {
+                    if (zein.name.endsWith('.class')) {
+                        ClassReader reader = new ClassReader(zin)
+                        reader.accept(visitor, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES)
+                    }
+                }
+            }
+        }
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/checks/CheckMode.groovy

@@ -0,0 +1,9 @@
+package net.minecraftforge.forge.tasks.checks
+
+import groovy.transform.CompileStatic
+
+@CompileStatic
+enum CheckMode {
+    CHECK,
+    FIX
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/checks/CheckPatches.groovy

@@ -0,0 +1,182 @@
+package net.minecraftforge.forge.tasks.checks
+
+import groovy.transform.CompileStatic
+import org.gradle.api.file.DirectoryProperty
+import org.gradle.api.provider.ListProperty
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.InputDirectory
+import org.gradle.api.tasks.Optional
+
+import java.nio.file.Files
+import java.nio.file.Path
+import java.util.regex.Pattern
+
+@CompileStatic
+abstract class CheckPatches extends CheckTask {
+
+    private static final Pattern HUNK_START_PATTERN = Pattern.compile('^@@ -[0-9,]* \\+[0-9,_]* @@$')
+    private static final Pattern WHITESPACE_PATTERN = Pattern.compile('^[+\\-]\\s*$')
+    private static final Pattern IMPORT_PATTERN = Pattern.compile('^[+\\-]\\s*import.*')
+    private static final Pattern FIELD_PATTERN = Pattern.compile('^[+\\-][\\s]*((public|protected|private)[\\s]*)?(static[\\s]*)?(final)?([^=;]*)(=.*)?;\\s*$')
+    private static final Pattern METHOD_PATTERN = Pattern.compile('^[+\\-][\\s]*((public|protected|private)[\\s]*)?(static[\\s]*)?(final)?([^(]*)[(]([^)]*)?[)]\\s*[{]\\s*$')
+    private static final Pattern CLASS_PATTERN = Pattern.compile('^[+\\-][\\s]*((public|protected|private)[\\s]*)?(static[\\s]*)?(final[\\s]*)?(class|interface)([^{]*)[{]\\s*$')
+    private static final Map<String, Integer> ACCESS_MAP = [private: 0, protected: 2, public: 3].tap { it.put(null, 1) }
+
+    @InputDirectory abstract DirectoryProperty getPatchDir()
+    @Input @Optional abstract ListProperty<String> getPatchesWithS2SArtifact()
+
+    @Override
+    void check(Reporter reporter, boolean fix) {
+        final patchDir = getPatchDir().get().asFile.toPath()
+        Files.walk(patchDir).withCloseable {
+            it.filter(Files.&isRegularFile).forEach { path ->
+                final String relativeName = patchDir.relativize(path).toString()
+                verifyPatch(path, reporter, fix, relativeName, patchesWithS2SArtifact.get().contains(relativeName.replace('\\', '/')))
+            }
+        }
+    }
+    
+    def accessChange(previous, current) {
+        //return ACCESS_MAP[previous] < ACCESS_MAP[current]
+        return previous != current
+    }
+
+    void verifyPatch(Path patch, Reporter reporter, boolean fix, String patchPath, boolean hasS2SArtifact) {
+        final oldFixedErrors = reporter.fixed.size()
+
+        final lines = Files.readAllLines(patch)
+
+        int hunksStart = 0
+        boolean onlyWhiteSpace = false
+
+        final List<String> newLines = []
+
+        // First two lines are file name ++/-- and we do not care
+        newLines.add(lines[0] + '\n')
+        newLines.add(lines[1] + '\n')
+
+        int i
+        for (i = 2; i < lines.size(); ++i) {
+            def line = lines[i]
+            newLines.add(line + '\n')
+
+            if (HUNK_START_PATTERN.matcher(line).find()) {
+                if (onlyWhiteSpace) {
+                    if (!hasS2SArtifact)
+                        reporter.report("Patch contains only white space hunk starting at line ${hunksStart + 1}, file: $patchPath")
+                    int toRemove = i - hunksStart
+                    while (toRemove-- > 0)
+                        newLines.remove(newLines.size() - 1)
+                }
+                hunksStart = i
+                onlyWhiteSpace = true
+                continue
+            }
+
+            if (line.startsWithAny('+','-')) {
+                def prefixChange = false
+                def prevLine = lines[i - 1]
+
+                if (line.charAt(0) == (char)'+' && prevLine.charAt(0) == (char)'-') {
+                    def prevTrim = prevLine.substring(1).replaceAll("\\s", "")
+                    def currTrim = line.substring(1).replaceAll("\\s", "")
+
+                    if (prevTrim == currTrim) {
+                        prefixChange = true
+                    }
+
+                    def pMatcher = FIELD_PATTERN.matcher(prevLine)
+                    def cMatcher = FIELD_PATTERN.matcher(line)
+
+                    if (pMatcher.find() && cMatcher.find() &&
+                            pMatcher.group(6) == cMatcher.group(6) && // = ...
+                            pMatcher.group(5) == cMatcher.group(5) && // field name
+                            pMatcher.group(3) == cMatcher.group(3) && // static
+                            (accessChange(pMatcher.group(2), cMatcher.group(2)) || pMatcher.group(4) != cMatcher.group(4))) {
+                        reporter.report("Patch contains access changes or final removal at line ${i + 1}, file: $patchPath", false)
+                    }
+
+                    pMatcher = METHOD_PATTERN.matcher(prevLine)
+                    cMatcher = METHOD_PATTERN.matcher(line)
+
+                    if (pMatcher.find() && cMatcher.find() &&
+                            pMatcher.group(6) == cMatcher.group(6) && // params
+                            pMatcher.group(5) == cMatcher.group(5) && // <T> void name
+                            pMatcher.group(3) == cMatcher.group(3) && // static
+                            (accessChange(pMatcher.group(2), cMatcher.group(2)) || pMatcher.group(4) != cMatcher.group(4))) {
+                        reporter.report("Patch contains access changes or final removal at line ${i + 1}, file: $patchPath", false)
+                    }
+
+                    pMatcher = CLASS_PATTERN.matcher(prevLine)
+                    cMatcher = CLASS_PATTERN.matcher(line)
+
+                    if (pMatcher.find() && cMatcher.find() &&
+                            pMatcher.group(6) == cMatcher.group(6) && // ClassName<> extends ...
+                            pMatcher.group(5) == cMatcher.group(5) && // class | interface
+                            pMatcher.group(3) == cMatcher.group(3) && // static
+                            (accessChange(pMatcher.group(2), cMatcher.group(2)) || pMatcher.group(4) != cMatcher.group(4))) {
+                        reporter.report("Patch contains access changes or final removal at line ${i + 1}, file: $patchPath", false)
+                    }
+                }
+
+                if (line.charAt(0) == (char)'-' && i + 1 < lines.size()) {
+                    final nextLine = lines[i + 1]
+                    if (nextLine.charAt(0) == (char)'+') {
+                        final nextTrim = nextLine.substring(1).replaceAll("\\s", "")
+                        final currTrim = line.substring(1).replaceAll("\\s", "")
+
+                        if (nextTrim == currTrim) {
+                            prefixChange = true
+                        }
+                    }
+                }
+
+                final isWhiteSpaceChange = WHITESPACE_PATTERN.matcher(line).find()
+
+                if (!prefixChange && !isWhiteSpaceChange) {
+                    onlyWhiteSpace = hasS2SArtifact && IMPORT_PATTERN.matcher(line).find()
+                } else if (isWhiteSpaceChange) {
+                    final prevLineChange = prevLine.startsWithAny('+','-')
+                    final nextLineChange = i + 1 < lines.size() && lines[i + 1].startsWithAny('+','-')
+
+                    if (!prevLineChange && !nextLineChange) {
+                        reporter.report("Patch contains white space change in valid hunk at line ${i + 1}, file: $patchPath", false)
+                    }
+                }
+
+                if (line.contains('\t')) {
+                    reporter.report("Patch contains tabs on line ${i + 1}, file: $patchPath")
+                    line = line.replaceAll('\t', '    ')
+                    newLines.remove(newLines.size() - 1)
+                    newLines.add(line + '\n')
+                }
+
+                if (IMPORT_PATTERN.matcher(line).find() && !hasS2SArtifact) {
+                    reporter.report("Patch contains import change on line ${i + 1}, file: $patchPath", false)
+                }
+            }
+        }
+
+        if (onlyWhiteSpace) {
+            if (!hasS2SArtifact)
+                reporter.report("Patch contains only white space hunk starting at line ${hunksStart + 1}, file: $patchPath")
+            def toRemove = i - hunksStart;
+            while (toRemove-- > 0)
+                newLines.remove(newLines.size() - 1)
+        }
+
+        if ((reporter.fixed.size() > oldFixedErrors && fix) || hasS2SArtifact) {
+            if (newLines.size() <= 2) {
+                logger.lifecycle("Patch is now empty removing, file: {}", patchPath)
+                Files.delete(patch)
+            }
+            else {
+                if (!hasS2SArtifact)
+                    logger.lifecycle("*** Updating patch file. Please run setup then genPatches again. ***")
+                Files.newBufferedWriter(patch).withCloseable {
+                    newLines.each { l -> it.write(l) }
+                }
+            }
+        }
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/checks/CheckSAS.groovy

@@ -0,0 +1,110 @@
+package net.minecraftforge.forge.tasks.checks
+
+import groovy.transform.CompileStatic
+import net.minecraftforge.forge.tasks.Annotatable
+import net.minecraftforge.forge.tasks.InheritanceData
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.InputFiles
+
+@CompileStatic
+abstract class CheckSAS extends CheckTask {
+
+    @InputFile abstract RegularFileProperty getInheritance()
+    @InputFiles abstract ConfigurableFileCollection getSass()
+
+    @Override
+    void check(Reporter reporter, boolean fix) {
+        final inheritance = InheritanceData.parse(this.inheritance.get().asFile)
+
+        sass.each { f ->
+            final lines = []
+            f.eachLine { line ->
+                if (line[0] == '\t') return // Skip any tabbed lines, those are ones we add
+                final idx = line.indexOf('#')
+                if (idx == 0 || line.isEmpty()) {
+                    lines.add(line)
+                    return
+                }
+                def comment = idx == -1 ? null : line.substring(idx)
+                if (idx != -1) line = line.substring(0, idx - 1)
+                final spl = (line.trim().replace('(', ' (') + '     ').split(' ', -1)
+                def (String cls, String name, String desc) = [spl[0], spl[1], spl[2]]
+                cls = cls.replaceAll('\\.', '/')
+
+                if (inheritance[cls] === null) {
+                    reporter.report("Invalid: $line")
+                } else if (name.isEmpty()) { //Class SAS
+                    final toAdd = []
+                    final clsSided = isSided(inheritance[cls])
+                    boolean sided = clsSided
+
+                    /* TODO: MergeTool doesn't do fields
+                    if (json[cls]['fields'] != null) {
+                        for (entry in json[cls]['fields']) {
+                            if (isSided(entry.value)) {
+                                sided = true
+                                toAdd.add('\t' + cls + ' ' + entry.key)
+                            }
+						}
+                    } */
+
+                    final clsInh = inheritance[cls]
+                    if (clsInh.methods) {
+                        for (entry in clsInh.methods) {
+                            if (isSided(entry.value)) {
+                                sided = true
+                                toAdd.add('\t' + cls + ' ' + entry.key.replaceAll(' ', ''))
+                                findChildMethods(inheritance, cls, entry.key).each { lines.add('\t' + it) }
+                                findChildMethods(inheritance, cls, entry.key).each { println(line + ' -- ' + it) }
+                            } else if (clsSided) {
+                                findChildMethods(inheritance, cls, entry.key).each { lines.add('\t' + it) }
+                                findChildMethods(inheritance, cls, entry.key).each { println(line + ' -- ' + it) }
+                            }
+                        }
+                    }
+
+                    if (sided) {
+                        lines.add(cls + (comment == null ? '' : ' ' + comment))
+                        lines.addAll(toAdd.sort())
+                    } else {
+                        reporter.report("Invalid: $line")
+                    }
+
+                } else if (desc.isEmpty()) { // Fields
+                    /* TODO: MergeTool doesn't do fields
+                    if (json[cls]['fields'] != null && isSided(json[cls]['fields'][name]))
+                        lines.add(cls + ' ' + name + (comment == null ? '' : ' ' + comment))
+                    else */
+                    reporter.report("Invalid: $line")
+                } else { // Methods
+                    final clsInh = inheritance[cls]
+                    if (clsInh.methods === null || !isSided(clsInh.methods[name + ' ' + desc]))
+                        reporter.report("Invalid: $line")
+                    else {
+                        lines.add(cls + ' ' + name + desc + (comment == null ? '' : ' ' + comment))
+                        findChildMethods(inheritance, cls, name + ' ' + desc).each { println(line + ' -- ' + it) }
+                        findChildMethods(inheritance, cls, name + ' ' + desc).each { lines.add('\t' + it) }
+                    }
+                }
+            }
+
+            if (fix) f.text = lines.join('\n')
+        }
+    }
+
+    protected static isSided(Annotatable annotatable) {
+        if (annotatable === null) return false
+        for (ann in annotatable.annotations) {
+            if ('Lnet/minecraftforge/api/distmarker/OnlyIn;' == ann.desc)
+                return true
+        }
+        return false
+    }
+    
+    protected static findChildMethods(Map<String, InheritanceData> json, String cls, String desc) {
+        return json.values().findAll{ it.methods != null && it.methods[desc] != null && it.methods[desc].override == cls && isSided(it.methods[desc]) }
+                .collect { it.name + ' ' + desc.replace(' ', '') } as TreeSet
+    }
+}

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/checks/CheckTask.groovy

@@ -0,0 +1,111 @@
+package net.minecraftforge.forge.tasks.checks
+
+import groovy.transform.CompileStatic
+import net.minecraftforge.forge.tasks.Util
+import org.gradle.api.Action
+import org.gradle.api.DefaultTask
+import org.gradle.api.logging.LogLevel
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.TaskContainer
+import org.gradle.api.tasks.VerificationTask
+
+@CompileStatic
+abstract class CheckTask extends DefaultTask implements VerificationTask {
+    @Input
+    abstract Property<CheckMode> getMode()
+
+    private boolean ignoreFailures = false
+
+    @Input
+    @Override
+    boolean getIgnoreFailures() {
+        return ignoreFailures
+    }
+
+    @Override
+    void setIgnoreFailures(boolean ignoreFailures) {
+        this.ignoreFailures = ignoreFailures
+    }
+
+    @TaskAction
+    void run() {
+        Util.init()
+
+        final doFix = getMode().get() === CheckMode.FIX
+        final Reporter reporter = new Reporter(doFix)
+        check(reporter, doFix)
+
+        if (reporter.messages) {
+            if (getMode().get() === CheckMode.CHECK) {
+                logger.error("Check task '{}' found errors:\n{}", name, reporter.messages.join('\n'))
+                if (!ignoreFailures) {
+                    throw new IllegalArgumentException("${reporter.messages.size()} errors were found!")
+                }
+            } else {
+                if (logger.isEnabled(LogLevel.DEBUG)) {
+                    logger.warn("Check task '{}' found {} errors and fixed {}:\n{}", name, reporter.messages.size(), reporter.fixed.size(), reporter.fixed.join('\n'))
+                } else {
+                    logger.warn("Check task '{}' found {} errors and fixed {}.", name, reporter.messages.size(), reporter.fixed.size())
+                }
+
+                if (reporter.notFixed) {
+                    logger.error('{} errors could not be fixed:\n{}', reporter.notFixed.size(), reporter.notFixed.join('\n'))
+                    if (!ignoreFailures) {
+                        throw new IllegalArgumentException("${reporter.notFixed.size()} errors which cannot be fixed were found!")
+                    }
+                }
+            }
+        }
+    }
+
+    abstract void check(Reporter reporter, boolean fix)
+
+    @CompileStatic
+    static final class Reporter {
+        final boolean trackFixed
+        Reporter(boolean trackFixed) {
+            this.trackFixed = trackFixed
+        }
+
+        public final List<String> messages = []
+
+        public final List<String> fixed = []
+        public final List<String> notFixed = []
+
+        void report(String message, boolean canBeFixed = true) {
+            messages.add(message)
+
+            if (trackFixed) {
+                if (canBeFixed) {
+                    fixed.add(message)
+                } else {
+                    notFixed.add(message)
+                }
+            }
+        }
+    }
+
+    static <T extends CheckTask> void registerTask(TaskContainer tasks, String taskName, @DelegatesTo.Target('type') Class<T> clazz,
+                                                   @DelegatesTo(genericTypeIndex = 0, target = 'type') Closure configuration) {
+        taskName = taskName.capitalize()
+        tasks.register("check$taskName", clazz) { CheckTask task ->
+            def castedTask = task as T
+            configuration.setDelegate(castedTask)
+            configuration.call(castedTask)
+            castedTask.mode.set(CheckMode.CHECK)
+            castedTask.group = 'checks'
+        }
+        tasks.named('checkAll').configure { it.dependsOn("check$taskName") }
+
+        tasks.register("checkAndFix$taskName", clazz) { CheckTask task ->
+            def castedTask = task as T
+            configuration.setDelegate(castedTask)
+            configuration.call(castedTask)
+            castedTask.mode.set(CheckMode.FIX)
+            castedTask.group = 'checks'
+        }
+        tasks.named('checkAllAndFix').configure { it.dependsOn("checkAndFix$taskName") }
+    }
+}

docs/README.md

@@ -2,15 +2,16 @@
 
 MinecraftForge
 =============
-[![Stable Release](https://img.shields.io/badge/dynamic/json?url=https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json&label=Stable&prefix=1.21.11-&query=$.promos["1.21.11-recommended"]&color=brightgreen&logo=data:image/svg+xml;base64,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)][Download]
-[![Latest Release](https://img.shields.io/badge/dynamic/json?url=https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json&label=Latest&prefix=1.21.11-&query=$.promos["1.21.11-latest"]&color=blue&logo=data:image/svg+xml;base64,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
+[![Stable Release](https://img.shields.io/badge/dynamic/json?url=https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json&label=Stable&prefix=1.20.1&query=$.promos["1.20.1-recommended"]&color=brightgreen&logo=data:image/svg+xml;base64,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)][Download]
+[![Latest Release](https://img.shields.io/badge/dynamic/json?url=https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json&label=Latest&prefix=1.20.1-&query=$.promos["1.20.1-latest"]&color=blue&logo=data:image/svg+xml;base64,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
 )][Download] [![Discord](https://img.shields.io/discord/313125603924639766.svg?color=%237289da&label=Discord&logo=discord&logoColor=%237289da)][Discord] [![Support](https://img.shields.io/badge/Patreon-Support-orange.svg?logo=Patreon)][Patreon]
 
 Forge is a free, open-source modding API all of your favourite mods use!
 
-| Version      | Support                     |
-|--------------|-----------------------------|
-| All versions | [Supported][Support-Policy] |
+| Version |    Support    |
+|---------| ------------- |
+| 1.20.x  |    Active     |
+| 1.19.x  |    Legacy     |
 
 * [Download]
 * [Forum]
@@ -26,23 +27,10 @@ You can download the installer for the *Recommended Build* or the
  *Latest build* there. Latest builds may have newer features but may be
  more unstable as a result. The installer will attempt to install Forge
  into your vanilla launcher environment, where you can then create a new
- profile using that version and play the game!
+ profile using that version and play the game! 
  
 For support and questions, visit [the Support Forum][Support-Forum] or [the Forge Discord server][Discord].
 
-## Required Java Versions
-
-We require the version of Java that Minecraft requires, which is currently:
-
-| Minecraft     | Java              |
-|---------------|-------------------|
-| 1.20.6+       | [21][Adoptium-21] |
-| 1.18 - 1.20.4 | [17][Adoptium-17] |
-| 1.17.1        | [16][Adoptium-16] |
-| 1.16.5-       | [8][Adoptium-8]   |
-
-**If you are on Windows and have difficulty using Java to launch JAR files, consider using [Jarfix by Johann Löfflmann][Jarfix].**
-
 # Creating Mods
 
 [See the "Getting Started" section in the Forge Documentation][Getting-Started].
@@ -70,25 +58,13 @@ Please ensure you have a valid email address associated with your GitHub account
  to use and modify. However, it costs money to run such a large project as this, so please consider 
  [becoming a patron][Patreon].*
 
-### Thanks
-[![YourKit](https://www.yourkit.com/images/yklogo.png)](https://www.yourkit.com/)
-
-YourKit for providing us accesss to their [YourKit Java Profiler] which helps identify bottlenecks and places for improvment.
-
 [Contributing]: ./CONTRIBUTING.md
 [CLA]: https://cla-assistant.io/MinecraftForge/MinecraftForge
 
 [Download]: https://files.minecraftforge.net/
 
-[Adoptium-21]: https://adoptium.net/temurin/releases/?version=21
-[Adoptium-17]: https://adoptium.net/temurin/releases/?version=17
-[Adoptium-16]: https://adoptium.net/temurin/releases/?version=16
-[Adoptium-8]: https://adoptium.net/temurin/releases/?version=8
-[Jarfix]: https://johann.loefflmann.net/en/software/jarfix/index.html
-
 [Forum]: https://forums.minecraftforge.net/
 [Support-Forum]: https://forums.minecraftforge.net/forum/18-support-bug-reports/
-[Support-Policy]: https://forums.minecraftforge.net/topic/144690-new-tiered-support-policy
 
 [Discord]: https://discord.minecraftforge.net/
 
@@ -97,5 +73,4 @@ YourKit for providing us accesss to their [YourKit Java Profiler] which helps id
 [ForgeDev]: https://docs.minecraftforge.net/en/latest/forgedev/
 [Pull-Requests]: https://docs.minecraftforge.net/en/latest/forgedev/#making-changes-and-pull-requests
 
-[Patreon]: https://www.patreon.com/LexManos
-[YourKit Java Profiler]: https://www.yourkit.com/java/profiler/
+[Patreon]: https://www.patreon.com/MinecraftForge

fmlcore/build.gradle

@@ -1,78 +1,74 @@
 plugins {
-    id 'java-library'
-    id 'maven-publish'
-    alias libs.plugins.licenser
-    alias libs.plugins.gradleutils
-    alias libs.plugins.gitversion
-    alias libs.plugins.changelog
-    id 'net.minecraftforge.forge.build.convention'
+    id 'com.github.ben-manes.versions'
+    id 'org.javamodularity.moduleplugin' version '1.8.3' apply false
+    id 'org.cadixdev.licenser'
 }
+apply plugin: 'java-library'
+apply plugin: 'jacoco'
+apply plugin: 'org.javamodularity.moduleplugin'
 
-gradleutils.displayName = 'FML'
-final vendor = 'Forge Development LLC'
-description = 'Modifications to Minecraft to enable mod developers.'
+dependencyUpdates.rejectVersionIf { isNonStable(it.candidate.version) }
 
 dependencies {
-    compileOnly libs.jetbrains.annotations
+    compileOnly("org.jetbrains:annotations:${JETBRAINS_ANNOTATIONS_VERSION}")
 
-    api libs.eventbus
+    api("net.minecraftforge:eventbus:${EVENTBUS_VERSION}")
 
-    implementation projects.fmlloader
-    implementation libs.commons.io
+    implementation(project(':fmlloader'))
+    implementation("commons-io:commons-io:${COMMONS_IO_VERSION}")
 }
 
-java {
-    toolchain.languageVersion = JavaLanguageVersion.of(javaVersion)
-    withSourcesJar()
+task sourcesJar(type: Jar) {
+    archiveClassifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+ext {
+    MANIFESTS = [
+        '': [
+            'FMLModType': 'LIBRARY',
+            'Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
+            'Git-Commit': GIT_INFO.abbreviatedId,
+            'Git-Branch': GIT_INFO.branch,
+            'Build-Number': "${System.getenv('BUILD_NUMBER')?:0}"
+        ] as LinkedHashMap,
+        'net/minecraftforge/fml/loading/': [
+            'Specification-Title':      'FMLLoader',
+            'Specification-Vendor':     'Forge Development LLC',
+            'Specification-Version':    '1',
+            'Implementation-Title':     'FML Loader',
+            'Implementation-Version':   '1.0',
+            'Implementation-Vendor':    'Forge'
+        ] as LinkedHashMap
+    ]
+}
+
+jar.doFirst {
+    manifest.attributes['Automatic-Module-Name'] = project.name
+    MANIFESTS.each { pkg, values ->
+        if (pkg == '')
+            manifest.attributes(values)
+        else
+            manifest.attributes(values, pkg)
+    }
+}
+
+tasks.withType(JavaCompile) {
+    options.compilerArgs << '-Xlint:unchecked'
 }
 
 license {
     header = rootProject.file('LICENSE-header.txt')
-}
-changelog {
-    from changelogBase
+
+    include 'net/minecraftforge/'
 }
 
-tasks.withType(JavaCompile).configureEach {
-    options.compilerArgs << '-Xlint:-unchecked'
+artifacts {
+    archives jar
+    archives sourcesJar
 }
 
-tasks.named('jar', Jar) {
-    manifest {
-        attributes([
-            'Automatic-Module-Name': 'net.minecraftforge.fmlcore',
-            'FMLModType'           : 'LIBRARY'
-        ])
-        attributes([
-            'Specification-Title'   : gradleutils.displayName.get(),
-            'Specification-Vendor'  : vendor,
-            'Specification-Version' : '1',
-            'Implementation-Title'  : gradleutils.displayName.get(),
-            'Implementation-Version': '1.0',
-            'Implementation-Vendor' : vendor
-        ], 'net/minecraftforge/fml/')
-    }
-}
-
-publishing {
-    repositories {
-        maven gradleutils.publishingForgeMaven
-    }
-
-    publications.register('mavenJava', MavenPublication) {
-        changelog.publish(it)
-        gradleutils.promote(it)
-
-        from components.java
-
-        pom {
-            description = project.description
-
-            gradleutils.pom.addRemoteDetails(pom)
-
-            licenses {
-                license gradleutils.pom.licenses.LGPLv2_1
-            }
-        }
-    }
-}
+publishing.publications.mavenJava(MavenPublication) {
+    from components.java
+    artifact sourcesJar
+}

fmlcore/src/main/java/net/minecraftforge/fml/Bindings.java

@@ -5,39 +5,36 @@
 
 package net.minecraftforge.fml;
 
-import net.minecraftforge.eventbus.api.bus.BusGroup;
+import cpw.mods.modlauncher.util.ServiceLoaderUtils;
+import net.minecraftforge.eventbus.api.IEventBus;
 import net.minecraftforge.fml.config.IConfigEvent;
 import net.minecraftforge.fml.loading.FMLLoader;
 
-import java.util.ServiceConfigurationError;
 import java.util.ServiceLoader;
 import java.util.function.Supplier;
 
-/**
- * Used to allow access to certain things from the game layer
- */
 public class Bindings {
-    private Bindings() {}
+    private static final Bindings INSTANCE = new Bindings();
 
-    /**
-     * The provider of the bindings
-     * @implNote May also throw a {@link ServiceConfigurationError}
-     */
-    private static final IBindingsProvider PROVIDER = ServiceLoader.load(FMLLoader.getGameLayer(), IBindingsProvider.class)
-            .findFirst().orElseThrow(() -> new IllegalStateException("Could not find bindings provider"));
+    private final IBindingsProvider provider;
 
-    /**
-     * @return A supplier of net.minecraftforge.common.MinecraftForge#EVENT_BUS
-     */
-    public static Supplier<BusGroup> getForgeBus() {
-        return PROVIDER.getForgeBusSupplier();
+    private Bindings() {
+        final var providers = ServiceLoaderUtils.streamServiceLoader(()->ServiceLoader.load(FMLLoader.getGameLayer(), IBindingsProvider.class), sce->{}).toList();
+        if (providers.size() != 1) {
+            throw new IllegalStateException("Could not find bindings provider");
+        }
+        this.provider = providers.get(0);
+    }
+
+    public static Supplier<IEventBus> getForgeBus() {
+        return INSTANCE.provider.getForgeBusSupplier();
     }
 
     public static Supplier<I18NParser> getMessageParser() {
-        return PROVIDER.getMessageParser();
+        return INSTANCE.provider.getMessageParser();
     }
 
     public static Supplier<IConfigEvent.ConfigConfig> getConfigConfiguration() {
-        return PROVIDER.getConfigConfiguration();
+        return INSTANCE.provider.getConfigConfiguration();
     }
 }

fmlcore/src/main/java/net/minecraftforge/fml/DeferredWorkQueue.java

@@ -57,9 +57,7 @@ public class DeferredWorkQueue
         LOGGER.debug(LOADING, "Dispatching synchronous work for work queue {}: {} jobs", modLoadingStage, tasks.size());
         RuntimeException aggregate = new RuntimeException();
         Stopwatch timer = Stopwatch.createStarted();
-        for (TaskInfo t : tasks) {
-            makeRunnable(t, Runnable::run, aggregate);
-        }
+        tasks.forEach(t -> makeRunnable(t, Runnable::run, aggregate));
         timer.stop();
         if (aggregate.getSuppressed().length > 0) {
             LOGGER.fatal(
@@ -116,7 +114,7 @@ public class DeferredWorkQueue
         return future;
     }
 
-    private static final class TaskInfo {
+    private static class TaskInfo {
         private final ModContainer owner;
         private Runnable task;
         private CompletableFuture<?> future;

fmlcore/src/main/java/net/minecraftforge/fml/DistExecutor.java

@@ -25,18 +25,7 @@ import java.util.function.Supplier;
  * <li>When you want to call one thing on one side, another thing on the other and return a result {@link #safeRunForDist(Supplier, Supplier)}</li>
  * <li>When you want to run something on one side {@link #safeRunWhenOn(Dist, Supplier)}</li>
  * </ul>
- *
- * @deprecated Historically, this allowed for safe execution of code on the correct side by exploiting a low-level
- * detail in Java 8, but in newer versions a simple if check is enough.
- * <br>
- * For example:
- * <pre>{@code
- * if (FMLEnvironment.dist.isClient()) {
- *     // client code here
- * }
- * }</pre>
  */
-@Deprecated(since = "1.21.5", forRemoval = true)
 public final class DistExecutor
 {
     private static final Logger LOGGER = LogManager.getLogger();

fmlcore/src/main/java/net/minecraftforge/fml/IBindingsProvider.java

@@ -5,13 +5,13 @@
 
 package net.minecraftforge.fml;
 
-import net.minecraftforge.eventbus.api.bus.BusGroup;
+import net.minecraftforge.eventbus.api.IEventBus;
 import net.minecraftforge.fml.config.IConfigEvent;
 
 import java.util.function.Supplier;
 
 public interface IBindingsProvider {
-    Supplier<BusGroup> getForgeBusSupplier();
+    Supplier<IEventBus> getForgeBusSupplier();
     Supplier<I18NParser> getMessageParser();
     Supplier<IConfigEvent.ConfigConfig> getConfigConfiguration();
 }

fmlcore/src/main/java/net/minecraftforge/fml/IExtensionPoint.java

@@ -25,7 +25,6 @@ import java.util.function.Supplier;
  * @param <T> the type of the record which is held by the extension point
  */
 @SuppressWarnings("unused") // Type parameter T
-// TODO: Complete re-write, this hasnt actually be used in a generic way by mods and we could make it a lot simpler.
 public interface IExtensionPoint<T extends Record>
 {
     /**
@@ -41,7 +40,7 @@ public interface IExtensionPoint<T extends Record>
      * where {@code true} means it is from the server and {@code false} means it is from the world save. The return
      * value of the predicate determines whether the remote version is "compatible" for the purposes of the display test.</p>
      *
-     * <p>The local compatibility version may be of the value {@link DisplayTest#IGNORESERVERONLY},
+     * <p>The local compatibility version may be of the value {@link net.minecraftforge.network.NetworkConstants#IGNORESERVERONLY},
      * in which case clients will ignore the mod's presence if it is present on the server but not on the client.
      * However, the remote version test predicate must still accept this value as a remote version in order to display
      * as compatible if the mod is present on the client.</p>
@@ -95,27 +94,6 @@ public interface IExtensionPoint<T extends Record>
      */
     @SuppressWarnings("JavadocReference") // reference to NetworkConstants, ForgeHooksClient
     record DisplayTest(Supplier<String> suppliedVersion, BiPredicate<String, Boolean> remoteVersionTest) implements IExtensionPoint<DisplayTest> {
-        public static final String IGNORESERVERONLY = "SERVER_ONLY";
-
-        /**
-         * Ignores any version information coming from the server - use for server only mods
-         */
-        public static final Supplier<DisplayTest> IGNORE_SERVER_VERSION = () -> new DisplayTest(IGNORESERVERONLY, (remoteVersion, isFromServer) -> true);
-
-        /**
-         * Ignores all information and provides no information
-         * <p>Note: If your mod is purely client-side and has no multiplayer functionality (be it dedicated servers or
-         * Open to LAN), consider setting {@code clientSideOnly=true} in the root of your mods.toml.</p>
-         */
-        public static final Supplier<DisplayTest> IGNORE_ALL_VERSION = () -> new DisplayTest("", (remoteVersion, isFromServer) -> true);
-
-        /**
-         * An optional alternative to {@link #DisplayTest(Supplier, BiPredicate)} which accepts a constant version string
-         * instead of a {@link Supplier}.
-         * <p>Internally, the provided version string is wrapped in a Supplier for you.</p>
-         */
-        public DisplayTest(String version, BiPredicate<String, Boolean> remoteVersionTest) {
-            this(() -> version, remoteVersionTest);
-        }
+        public static final String IGNORESERVERONLY = "OHNOES\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31\uD83D\uDE31";
     }
 }

fmlcore/src/main/java/net/minecraftforge/fml/IModLoadingState.java

@@ -5,6 +5,8 @@
 
 package net.minecraftforge.fml;
 
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.fml.event.IModBusEvent;
 import net.minecraftforge.fml.loading.progress.ProgressMeter;
 
 import java.util.Optional;
@@ -59,27 +61,27 @@ public interface IModLoadingState {
     /**
      * Builds the transition task for this state with a blank pre-sync and post-sync task.
      *
+     * @param <T>              a type of event fired on the mod-specific event bus
      * @param syncExecutor     a synchronous executor
      * @param parallelExecutor a parallel executor
      * @param progressBar      a progress meter for tracking progress
      * @return a transition task for this state
      * @see #buildTransition(Executor, Executor, ProgressMeter, Function, Function)
      */
-    default Optional<CompletableFuture<Void>> buildTransition(
-        final Executor syncExecutor,
-        final Executor parallelExecutor,
-        final ProgressMeter progressBar
-    ) {
+    default <T extends Event & IModBusEvent>
+    Optional<CompletableFuture<Void>> buildTransition(final Executor syncExecutor,
+                                                      final Executor parallelExecutor,
+                                                      final ProgressMeter progressBar) {
         return buildTransition(syncExecutor, parallelExecutor, progressBar,
-            e -> CompletableFuture.completedFuture(null),
-            e -> CompletableFuture.completedFuture(null)
-        );
+                e -> CompletableFuture.runAsync(() -> {}, e),
+                e -> CompletableFuture.runAsync(() -> {}, e));
     }
 
     /**
      * Builds the transition task for this state. The pre-sync and post-sync task functions allow the transition builder
      * to run these tasks on the same executor as the actual event dispatch and pre/post hooks.
      *
+     * @param <T>              a type of event fired on the mod-specific event bus
      * @param syncExecutor     a synchronous executor
      * @param parallelExecutor a parallel executor
      * @param progressBar      a progress meter for tracking progress
@@ -87,6 +89,7 @@ public interface IModLoadingState {
      * @param postSyncTask     a function which returns a task to run after event post-dispatch hook
      * @return a transition task for this state
      */
+    <T extends Event & IModBusEvent>
     Optional<CompletableFuture<Void>> buildTransition(final Executor syncExecutor,
                                                       final Executor parallelExecutor,
                                                       final ProgressMeter progressBar,

fmlcore/src/main/java/net/minecraftforge/fml/IModStateTransition.java

@@ -5,9 +5,12 @@
 
 package net.minecraftforge.fml;
 
+import net.minecraftforge.eventbus.api.Event;
 import net.minecraftforge.fml.event.IModBusEvent;
 import net.minecraftforge.fml.loading.progress.ProgressMeter;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Executor;
 import java.util.function.BiFunction;
@@ -15,67 +18,103 @@ import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Stream;
 
-import org.jetbrains.annotations.Nullable;
-
+@SuppressWarnings("unchecked")
 public interface IModStateTransition {
-    /** Magic value to allow me to optimize the futures list by ignoring the default value without making old methods nullable. */
-    BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> NULL_HOOK = (e, g) -> CompletableFuture.completedFuture(null);
-
     static IModStateTransition buildNoopTransition() {
-        return ModStateTransitionHelper.NOOP;
+        return new NoopTransition();
     }
 
-    default CompletableFuture<Void> build(
-        final String name,
-        final Executor syncExecutor,
-        final Executor parallelExecutor,
-        final ProgressMeter progressBar,
-        final Function<Executor, CompletableFuture<Void>> preSyncTask,
-        final Function<Executor, CompletableFuture<Void>> postSyncTask
-    ) {
-        return ModStateTransitionHelper.build(this, name, syncExecutor, parallelExecutor, progressBar, preSyncTask, postSyncTask);
+    default <T extends Event & IModBusEvent>
+    CompletableFuture<Void> build(final String name,
+                                  final Executor syncExecutor,
+                                  final Executor parallelExecutor,
+                                  final ProgressMeter progressBar,
+                                  final Function<Executor, CompletableFuture<Void>> preSyncTask,
+                                  final Function<Executor, CompletableFuture<Void>> postSyncTask) {
+        List<CompletableFuture<Void>> futures = new ArrayList<>();
+
+        this.eventFunctionStream().get()
+                .map(f -> (EventGenerator<T>) f)
+                .reduce((head, tail) -> addCompletableFutureTaskForModDispatch(syncExecutor, parallelExecutor, futures, progressBar, head, ModLoadingStage::currentState, tail))
+                .ifPresent(last -> addCompletableFutureTaskForModDispatch(syncExecutor, parallelExecutor, futures, progressBar, last, nextModLoadingStage(), null));
+
+        final CompletableFuture<Void> preSyncTaskCF = preSyncTask.apply(syncExecutor);
+        final CompletableFuture<Void> eventDispatchCF = ModList.gather(futures).thenCompose(ModList::completableFutureFromExceptionList);
+        final CompletableFuture<Void> postEventDispatchCF = preSyncTaskCF
+                .thenApplyAsync(n -> {
+                    progressBar.label(progressBar.name() + ": dispatching "+name);
+                    return null;
+                }, parallelExecutor)
+                .thenComposeAsync(n -> eventDispatchCF, parallelExecutor)
+                .thenApply(r -> {
+                    postSyncTask.apply(syncExecutor);
+                    return null;
+                });
+        return this.finalActivityGenerator().apply(syncExecutor, postEventDispatchCF);
     }
 
     default BiFunction<ModLoadingStage, Throwable, ModLoadingStage> nextModLoadingStage() {
         return ModLoadingStage::nextState;
     }
 
-    /**
-     * This used to allow you to fire multiple events during the transition. However, in doing so it would cause issues with the default
-     * ModContainer's event handlers causing issues such as mod classes being constructed multiple times.
-     */
-    @Deprecated(since = "1.21.3", forRemoval = true)
-    default Supplier<Stream<EventGenerator<?>>> eventFunctionStream() {
-        return () -> Stream.ofNullable(eventFunction());
-    }
-
-    @Nullable
-    default <T extends IModBusEvent> EventGenerator<T> eventFunction() {
-        return null;
+    private <T extends Event & IModBusEvent>
+    EventGenerator<T> addCompletableFutureTaskForModDispatch(final Executor syncExecutor,
+                                                             final Executor parallelExecutor,
+                                                             final List<CompletableFuture<Void>> completableFutures,
+                                                             final ProgressMeter progressBar,
+                                                             final EventGenerator<T> eventGenerator,
+                                                             final BiFunction<ModLoadingStage, Throwable, ModLoadingStage> nextState,
+                                                             final EventGenerator<T> nextGenerator) {
+        final Executor selectedExecutor = threadSelector().apply(syncExecutor, parallelExecutor);
+
+        var preDispatchHook = (BiFunction<Executor, EventGenerator<T>, CompletableFuture<Void>>) preDispatchHook();
+        completableFutures.add(preDispatchHook.apply(selectedExecutor, eventGenerator));
+
+        completableFutures.add(ModList.get().futureVisitor(eventGenerator, progressBar, nextState).apply(threadSelector().apply(syncExecutor, parallelExecutor)));
+
+        var postDispatchHook = (BiFunction<Executor, EventGenerator<T>, CompletableFuture<Void>>) postDispatchHook();
+        completableFutures.add(postDispatchHook.apply(selectedExecutor, eventGenerator));
+
+        return nextGenerator;
     }
 
+    Supplier<Stream<EventGenerator<?>>> eventFunctionStream();
     ThreadSelector threadSelector();
     BiFunction<Executor, CompletableFuture<Void>, CompletableFuture<Void>> finalActivityGenerator();
+    BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> preDispatchHook();
+    BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> postDispatchHook();
 
-    /**
-     * I think this was meant as a way to do some things for each mod container beforge/after the transition had been sent to the container.
-     * However, the Future returned by this was never linked to the main transition future in any way.  Which means that it was run
-     * in parallel and couldn't guarantee the state of the ModContainer.
-     * <p>
-     * Plus all existing code that I could find returned a completedFuture, so I don't think anyone ever used this.
-     * <p>
-     * If I were to add this back it would be a CompletableFuture wrap(ModContainer, CompletableFuture)
-     * <p>
-     * Added magic value NULL_HOOK to allow me to optimize the futures list by ignoring the default value without making this method nullable.
-     */
-    @Deprecated(since = "1.21.3", forRemoval = true)
-    default BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> preDispatchHook() { return NULL_HOOK; }
-    @Deprecated(since = "1.21.3", forRemoval = true)
-    default BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> postDispatchHook() { return NULL_HOOK; }
-
-    interface EventGenerator<T extends IModBusEvent> extends Function<ModContainer, T> {
-        static <FN extends IModBusEvent> EventGenerator<FN> fromFunction(Function<ModContainer, FN> fn) {
+    interface EventGenerator<T extends Event & IModBusEvent> extends Function<ModContainer, T> {
+        static <FN extends Event & IModBusEvent> EventGenerator<FN> fromFunction(Function<ModContainer, FN> fn) {
             return fn::apply;
         }
     }
+}
+
+record NoopTransition() implements IModStateTransition {
+
+    @Override
+    public Supplier<Stream<EventGenerator<?>>> eventFunctionStream() {
+        return Stream::of;
+    }
+
+    @Override
+    public ThreadSelector threadSelector() {
+        return ThreadSelector.SYNC;
+    }
+
+    @Override
+    public BiFunction<Executor, CompletableFuture<Void>, CompletableFuture<Void>> finalActivityGenerator() {
+        return (e, t) -> t.thenApplyAsync(Function.identity(), e);
+    }
+
+    @Override
+    public BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> preDispatchHook() {
+        return (t, f)-> CompletableFuture.completedFuture(null);
+    }
+
+    @Override
+    public BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> postDispatchHook() {
+        return (t, f)-> CompletableFuture.completedFuture(null);
+    }
 }

fmlcore/src/main/java/net/minecraftforge/fml/InterModComms.java

@@ -61,7 +61,7 @@ public class InterModComms
         }
     }
 
-    private static final ConcurrentMap<String, ConcurrentLinkedQueue<IMCMessage>> containerQueues = new ConcurrentHashMap<>();
+    private static ConcurrentMap<String, ConcurrentLinkedQueue<IMCMessage>> containerQueues = new ConcurrentHashMap<>();
 
     /**
      * Send IMC to remote. Sender will default to the active modcontainer, or minecraft if not.
@@ -115,14 +115,16 @@ public class InterModComms
         return getMessages(modId, s->Boolean.TRUE);
     }
 
-    private record QueueFilteringSpliterator(
-            ConcurrentLinkedQueue<IMCMessage> queue,
-            Predicate<String> methodFilter,
-            Iterator<IMCMessage> iterator
-    ) implements Spliterator<IMCMessage> {
+    private static class QueueFilteringSpliterator implements Spliterator<IMCMessage>
+    {
+        private final ConcurrentLinkedQueue<IMCMessage> queue;
+        private final Predicate<String> methodFilter;
+        private final Iterator<IMCMessage> iterator;
 
         public QueueFilteringSpliterator(final ConcurrentLinkedQueue<IMCMessage> queue, final Predicate<String> methodFilter) {
-            this(queue, methodFilter, queue.iterator());
+            this.queue = queue;
+            this.iterator = queue.iterator();
+            this.methodFilter = methodFilter;
         }
 
         @Override

fmlcore/src/main/java/net/minecraftforge/fml/LogicalSide.java

@@ -16,7 +16,8 @@ import net.minecraftforge.api.distmarker.Dist;
  *
  * @see Dist
  */
-public enum LogicalSide {
+public enum LogicalSide
+{
     /**
      * The logical client of the Minecraft game, which interfaces with the player's inputs and renders the player's
      * viewpoint.
@@ -26,7 +27,6 @@ public enum LogicalSide {
      * @see Dist#CLIENT
      */
     CLIENT,
-
     /**
      * The logical server of the Minecraft game, responsible for connecting to clients and running the simulation logic
      * on the level.
@@ -41,14 +41,16 @@ public enum LogicalSide {
     /**
      * {@return if this logical side is the server}
      */
-    public boolean isServer() {
+    public boolean isServer()
+    {
         return !isClient();
     }
 
     /**
      * {@return if the logical side is the client}
      */
-    public boolean isClient() {
+    public boolean isClient()
+    {
         return this == CLIENT;
     }
 }

fmlcore/src/main/java/net/minecraftforge/fml/ModContainer.java

@@ -5,20 +5,22 @@
 
 package net.minecraftforge.fml;
 
-import net.minecraftforge.eventbus.api.bus.BusGroup;
+import net.minecraftforge.eventbus.api.Event;
 import net.minecraftforge.fml.config.IConfigEvent;
 import net.minecraftforge.fml.config.ModConfig;
 import net.minecraftforge.fml.event.IModBusEvent;
+import net.minecraftforge.fml.loading.progress.ProgressMeter;
 import net.minecraftforge.forgespi.language.IModInfo;
 
 import java.util.EnumMap;
-import java.util.HashSet;
+import java.util.HashMap;
 import java.util.IdentityHashMap;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
-import java.util.Set;
-import java.util.function.BiPredicate;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+import java.util.function.BiFunction;
 import java.util.function.Consumer;
 import java.util.function.Supplier;
 
@@ -30,40 +32,41 @@ import java.util.function.Supplier;
  * a mechanism by which we can wrap actual mod code so that the loader and other
  * facilities can treat mods at arms length.
  * </p>
+ *
+ * @author cpw
+ *
  */
-public abstract class ModContainer {
+
+public abstract class ModContainer
+{
     protected final String modId;
     protected final String namespace;
     protected final IModInfo modInfo;
     protected ModLoadingStage modLoadingStage;
     protected Supplier<?> contextExtension;
-    protected final Map<ModLoadingStage, Runnable> activityMap = new EnumMap<>(ModLoadingStage.class);
+    protected final Map<ModLoadingStage, Runnable> activityMap = new HashMap<>();
     protected final Map<Class<? extends IExtensionPoint<?>>, Supplier<?>> extensionPoints = new IdentityHashMap<>();
     protected final EnumMap<ModConfig.Type, ModConfig> configs = new EnumMap<>(ModConfig.Type.class);
-    final Set<ModContainer> dependencies = new HashSet<>();
-    /**
-     * If you want to handle the event, override {@link #dispatchConfigEvent(IConfigEvent)}
-     */
-    @Deprecated(since = "1.21.3", forRemoval = true)
+    @SuppressWarnings("OptionalUsedAsFieldOrParameterType")
     protected Optional<Consumer<IConfigEvent>> configHandler = Optional.empty();
 
-    public ModContainer(IModInfo info) {
+    public ModContainer(IModInfo info)
+    {
         this.modId = info.getModId();
         // TODO: Currently not reading namespace from configuration..
         this.namespace = this.modId;
         this.modInfo = info;
         this.modLoadingStage = ModLoadingStage.CONSTRUCT;
 
-        final String displayTestString = info.getConfig().<String>getConfigElement("displayTest")
-                .orElseGet(() -> info.getOwningFile().isClientSideOnly() ? "IGNORE_ALL_VERSION" : "MATCH_VERSION");
+        final String displayTestString = info.getConfig().<String>getConfigElement("displayTest").orElse("MATCH_VERSION"); // missing defaults to DEFAULT type
         Supplier<IExtensionPoint.DisplayTest> displayTestSupplier = switch (displayTestString) {
             case "MATCH_VERSION" -> // default displaytest checks for version string match
                     () -> new IExtensionPoint.DisplayTest(() -> this.modInfo.getVersion().toString(),
                         (incoming, isNetwork) -> Objects.equals(incoming, this.modInfo.getVersion().toString()));
             case "IGNORE_SERVER_VERSION" -> // Ignores any version information coming from the server - use for server only mods
-                    IExtensionPoint.DisplayTest.IGNORE_SERVER_VERSION;
+                    () -> new IExtensionPoint.DisplayTest(() -> IExtensionPoint.DisplayTest.IGNORESERVERONLY, (incoming, isNetwork) -> true);
             case "IGNORE_ALL_VERSION" -> // Ignores all information and provides no information
-                    IExtensionPoint.DisplayTest.IGNORE_ALL_VERSION;
+                    () -> new IExtensionPoint.DisplayTest(() -> "", (incoming, isNetwork) -> true);
             case "NONE" -> null; // NO display test at all - use this if you're going to do your own display test
             default -> // any other value throws an exception
                     throw new IllegalArgumentException("Invalid displayTest value supplied in mods.toml");
@@ -77,35 +80,58 @@ public abstract class ModContainer {
     /**
      * Errored container state, used for filtering. Does nothing.
      */
-    ModContainer() {
+    ModContainer()
+    {
         this.modLoadingStage = ModLoadingStage.ERROR;
         modId = "BROKEN";
         namespace = "BROKEN";
         modInfo = null;
     }
-
     /**
      * @return the modid for this mod
      */
-    public final String getModId() {
+    public final String getModId()
+    {
         return modId;
     }
 
     /**
      * @return the resource prefix for the mod
      */
-    public final String getNamespace() {
+    public final String getNamespace()
+    {
         return namespace;
     }
 
     /**
      * @return The current loading stage for this mod
      */
-    public ModLoadingStage getCurrentState() {
+    public ModLoadingStage getCurrentState()
+    {
         return modLoadingStage;
     }
 
-    public IModInfo getModInfo() {
+    public static <T extends Event & IModBusEvent> CompletableFuture<Void> buildTransitionHandler(
+            final ModContainer target,
+            final IModStateTransition.EventGenerator<T> eventGenerator,
+            final ProgressMeter progressBar,
+            final BiFunction<ModLoadingStage, Throwable, ModLoadingStage> stateChangeHandler,
+            final Executor executor) {
+        return CompletableFuture
+                .runAsync(() -> {
+                    ModLoadingContext.get().setActiveContainer(target);
+                    target.activityMap.getOrDefault(target.modLoadingStage, ()->{}).run();
+                    target.acceptEvent(eventGenerator.apply(target));
+                }, executor)
+                .whenComplete((mc, exception) -> {
+                    target.modLoadingStage = stateChangeHandler.apply(target.modLoadingStage, exception);
+                    progressBar.increment();
+                    ModLoadingContext.get().setActiveContainer(null);
+                });
+    }
+
+    public IModInfo getModInfo()
+    {
         return modInfo;
     }
 
@@ -114,35 +140,17 @@ public abstract class ModContainer {
         return Optional.ofNullable((T)extensionPoints.getOrDefault(point,()-> null).get());
     }
 
-    public <T extends Record & IExtensionPoint<T>> void registerExtensionPoint(Class<? extends IExtensionPoint<T>> point, Supplier<T> extension) {
+    public <T extends Record & IExtensionPoint<T>> void registerExtensionPoint(Class<? extends IExtensionPoint<T>> point, Supplier<T> extension)
+    {
         extensionPoints.put(point, extension);
     }
 
-    public void registerDisplayTest(IExtensionPoint.DisplayTest displayTest) {
-        registerExtensionPoint(IExtensionPoint.DisplayTest.class, () -> displayTest);
-    }
-
-    public void registerDisplayTest(Supplier<IExtensionPoint.DisplayTest> displayTest) {
-        registerExtensionPoint(IExtensionPoint.DisplayTest.class, displayTest);
-    }
-
-    public void registerDisplayTest(String version, BiPredicate<String, Boolean> remoteVersionTest) {
-        registerDisplayTest(new IExtensionPoint.DisplayTest(version, remoteVersionTest));
-    }
-
-    public void registerDisplayTest(Supplier<String> suppliedVersion, BiPredicate<String, Boolean> remoteVersionTest) {
-        registerDisplayTest(new IExtensionPoint.DisplayTest(suppliedVersion, remoteVersionTest));
-    }
-
     public void addConfig(final ModConfig modConfig) {
        configs.put(modConfig.getType(), modConfig);
     }
 
     public void dispatchConfigEvent(IConfigEvent event) {
-        var handler = configHandler.orElse(null);
-        if (handler != null) {
-            handler.accept(event);
-        }
+        configHandler.ifPresent(configHandler->configHandler.accept(event));
     }
 
     /**
@@ -158,17 +166,9 @@ public abstract class ModContainer {
      */
     public abstract Object getMod();
 
-    /**
-     * @return the mod bus group for this specific mod, or null if there is none.
-     *         Leave null if you use {@link BusGroup#DEFAULT} for your mod lifecycle events.
-     */
-    public BusGroup getModBusGroup() {
-        return null;
-    }
-
     /**
      * Accept an arbitrary event for processing by the mod. Probably posted to an event bus in the lower level container.
      * @param e Event to accept
      */
-    protected <T extends IModBusEvent> void acceptEvent(T e) {}
+    protected <T extends Event & IModBusEvent> void acceptEvent(T e) {}
 }

fmlcore/src/main/java/net/minecraftforge/fml/ModList.java

@@ -5,6 +5,9 @@
 
 package net.minecraftforge.fml;
 
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.fml.event.IModBusEvent;
+import net.minecraftforge.fml.loading.progress.ProgressMeter;
 import net.minecraftforge.forgespi.language.IModFileInfo;
 import net.minecraftforge.forgespi.language.IModInfo;
 import net.minecraftforge.forgespi.language.ModFileScanData;
@@ -12,15 +15,27 @@ import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import net.minecraftforge.fml.loading.moddiscovery.ModFileInfo;
 import net.minecraftforge.fml.loading.moddiscovery.ModInfo;
 import net.minecraftforge.forgespi.locating.IModFile;
-import java.util.Collections;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.util.AbstractMap;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
 import java.util.Comparator;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.ForkJoinWorkerThread;
 import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -30,25 +45,27 @@ import java.util.stream.Stream;
  * Master list of all mods - game-side version. This is classloaded in the game scope and
  * can dispatch game level events as a result.
  */
-public class ModList {
+public class ModList
+{
+    private static Logger LOGGER = LogManager.getLogger();
     private static ModList INSTANCE;
     private final List<IModFileInfo> modFiles;
     private final List<IModInfo> sortedList;
-    private final Map<String, IModFileInfo> fileById;
+    private final Map<String, ModFileInfo> fileById;
     private List<ModContainer> mods;
     private Map<String, ModContainer> indexedMods;
     private List<ModFileScanData> modFileScanData;
     private List<ModContainer> sortedContainers;
 
-    private ModList(final List<ModFile> modFiles, final List<ModInfo> sortedList) {
-        var modFileInfos = this.modFiles = modFiles.stream().map(ModFile::getModFileInfo).toList();
-        this.sortedList = sortedList.stream().map(IModInfo.class::cast).toList();
-        var byId = new HashMap<String, IModFileInfo>();
-        for (var file : modFileInfos) {
-            for (var mod : file.getMods())
-                byId.put(mod.getModId(), mod.getOwningFile());
-        }
-        this.fileById = Map.copyOf(byId);
+    private ModList(final List<ModFile> modFiles, final List<ModInfo> sortedList)
+    {
+        this.modFiles = modFiles.stream().map(ModFile::getModFileInfo).map(ModFileInfo.class::cast).collect(Collectors.toList());
+        this.sortedList = sortedList.stream().
+                map(ModInfo.class::cast).
+                collect(Collectors.toList());
+        this.fileById = this.modFiles.stream().map(IModFileInfo::getMods).flatMap(Collection::stream).
+                map(ModInfo.class::cast).
+                collect(Collectors.toMap(ModInfo::getModId, ModInfo::getOwningFile));
         CrashReportCallables.registerCrashCallable("Mod List", this::crashReport);
     }
 
@@ -57,20 +74,19 @@ public class ModList {
     }
 
     private String fileToLine(IModFile mf) {
-        var mainMod = mf.getModInfos().getFirst();
         return String.format(Locale.ENGLISH, "%-50.50s|%-30.30s|%-30.30s|%-20.20s|%-10.10s|Manifest: %s", mf.getFileName(),
-                mainMod.getDisplayName(),
-                mainMod.getModId(),
-                mainMod.getVersion(),
-                getModContainerState(mainMod.getModId()),
+                mf.getModInfos().get(0).getDisplayName(),
+                mf.getModInfos().get(0).getModId(),
+                mf.getModInfos().get(0).getVersion(),
+                getModContainerState(mf.getModInfos().get(0).getModId()),
                 ((ModFileInfo)mf.getModFileInfo()).getCodeSigningFingerprint().orElse("NOSIGNATURE"));
     }
-
     private String crashReport() {
-        return "\n" + applyForEachModFile(this::fileToLine).collect(Collectors.joining("\n\t\t", "\t\t", ""));
+        return "\n"+applyForEachModFile(this::fileToLine).collect(Collectors.joining("\n\t\t", "\t\t", ""));
     }
 
-    public static ModList of(List<ModFile> modFiles, List<ModInfo> sortedList) {
+    public static ModList of(List<ModFile> modFiles, List<ModInfo> sortedList)
+    {
         INSTANCE = new ModList(modFiles, sortedList);
         return INSTANCE;
     }
@@ -79,59 +95,123 @@ public class ModList {
         return INSTANCE;
     }
 
-    public List<IModFileInfo> getModFiles() {
+    private static ForkJoinWorkerThread newForkJoinWorkerThread(ForkJoinPool pool) {
+        ForkJoinWorkerThread thread = ForkJoinPool.defaultForkJoinWorkerThreadFactory.newThread(pool);
+        thread.setName("modloading-worker-" + thread.getPoolIndex());
+        // The default sets it to the SystemClassloader, so copy the current one.
+        thread.setContextClassLoader(Thread.currentThread().getContextClassLoader());
+        return thread;
+    }
+
+    public List<IModFileInfo> getModFiles()
+    {
         return modFiles;
     }
 
-    public IModFileInfo getModFileById(String modid) {
+    public IModFileInfo getModFileById(String modid)
+    {
         return this.fileById.get(modid);
     }
 
-    void setLoadedMods(final List<ModContainer> modContainers) {
+    <T extends Event & IModBusEvent> Function<Executor, CompletableFuture<Void>> futureVisitor(
+            final IModStateTransition.EventGenerator<T> eventGenerator,
+            final ProgressMeter progressBar,
+            final BiFunction<ModLoadingStage, Throwable, ModLoadingStage> stateChange) {
+        return executor -> gather(
+                this.mods.stream()
+                .map(mod -> ModContainer.buildTransitionHandler(mod, eventGenerator, progressBar, stateChange, executor))
+                .collect(Collectors.toList()))
+            .thenComposeAsync(ModList::completableFutureFromExceptionList, executor);
+    }
+    static CompletionStage<Void> completableFutureFromExceptionList(List<? extends Map.Entry<?, Throwable>> t) {
+        if (t.stream().noneMatch(e->e.getValue()!=null)) {
+            return CompletableFuture.completedFuture(null);
+        } else {
+            final List<Throwable> throwables = t.stream().filter(e -> e.getValue() != null).map(Map.Entry::getValue).collect(Collectors.toList());
+            CompletableFuture<Void> cf = new CompletableFuture<>();
+            final RuntimeException accumulator = new RuntimeException();
+            cf.completeExceptionally(accumulator);
+            throwables.forEach(exception -> {
+                if (exception instanceof CompletionException) {
+                    exception = exception.getCause();
+                }
+                if (exception.getSuppressed().length!=0) {
+                    Arrays.stream(exception.getSuppressed()).forEach(accumulator::addSuppressed);
+                } else {
+                    accumulator.addSuppressed(exception);
+                }
+            });
+            return cf;
+        }
+    }
+
+    static <V> CompletableFuture<List<Map.Entry<V, Throwable>>> gather(List<? extends CompletableFuture<? extends V>> futures) {
+        List<Map.Entry<V, Throwable>> list = new ArrayList<>(futures.size());
+        CompletableFuture<?>[] results = new CompletableFuture[futures.size()];
+        futures.forEach(future -> {
+            int i = list.size();
+            list.add(null);
+            results[i] = future.whenComplete((result, exception) -> list.set(i, new AbstractMap.SimpleImmutableEntry<>(result, exception)));
+        });
+        return CompletableFuture.allOf(results).handle((r, th)->null).thenApply(res -> list);
+    }
+
+    void setLoadedMods(final List<ModContainer> modContainers)
+    {
         this.mods = modContainers;
-        this.sortedContainers = modContainers.stream().sorted(Comparator.comparingInt(c -> sortedList.indexOf(c.getModInfo()))).toList();
+        this.sortedContainers = modContainers.stream().sorted(Comparator.comparingInt(c->sortedList.indexOf(c.getModInfo()))).toList();
         this.indexedMods = modContainers.stream().collect(Collectors.toMap(ModContainer::getModId, Function.identity()));
     }
 
     @SuppressWarnings("unchecked")
-    public <T> Optional<T> getModObjectById(String modId) {
+    public <T> Optional<T> getModObjectById(String modId)
+    {
         return getModContainerById(modId).map(ModContainer::getMod).map(o -> (T) o);
     }
 
-    public Optional<? extends ModContainer> getModContainerById(String modId) {
+    public Optional<? extends ModContainer> getModContainerById(String modId)
+    {
         return Optional.ofNullable(this.indexedMods.get(modId));
     }
 
-    public Optional<? extends ModContainer> getModContainerByObject(Object obj) {
+    public Optional<? extends ModContainer> getModContainerByObject(Object obj)
+    {
         return mods.stream().filter(mc -> mc.getMod() == obj).findFirst();
     }
 
-    public List<IModInfo> getMods() {
+    public List<IModInfo> getMods()
+    {
         return this.sortedList;
     }
 
-    public boolean isLoaded(String modTarget) {
+    public boolean isLoaded(String modTarget)
+    {
         return this.indexedMods.containsKey(modTarget);
     }
 
-    public int size() {
+    public int size()
+    {
         return mods.size();
     }
 
-    public List<ModFileScanData> getAllScanData() {
-        if (modFileScanData == null) {
+    public List<ModFileScanData> getAllScanData()
+    {
+        if (modFileScanData == null)
+        {
             modFileScanData = this.sortedList.stream().
                     map(IModInfo::getOwningFile).
                     filter(Objects::nonNull).
                     map(IModFileInfo::getFile).
                     distinct().
                     map(IModFile::getScanResult).
-                    toList();
+                    collect(Collectors.toList());
         }
         return modFileScanData;
+
     }
 
-    public void forEachModFile(Consumer<IModFile> fileConsumer) {
+    public void forEachModFile(Consumer<IModFile> fileConsumer)
+    {
         modFiles.stream().map(IModFileInfo::getFile).forEach(fileConsumer);
     }
 
@@ -147,11 +227,13 @@ public class ModList {
         this.sortedContainers.forEach(containerConsumer);
     }
 
-    public List<ModContainer> getLoadedMods() {
-        return this.sortedContainers;
-    }
-
     public <T> Stream<T> applyForEachModContainer(Function<ModContainer, T> function) {
         return indexedMods.values().stream().map(function);
     }
+
+    private static class UncaughtModLoadingException extends ModLoadingException {
+        public UncaughtModLoadingException(ModLoadingStage stage, Throwable originalException) {
+            super(null, stage, "fml.modloading.uncaughterror", originalException);
+        }
+    }
 }

fmlcore/src/main/java/net/minecraftforge/fml/ModLoader.java

@@ -6,7 +6,7 @@
 package net.minecraftforge.fml;
 
 import com.google.common.collect.ImmutableList;
-import net.minecraftforge.eventbus.api.bus.BusGroup;
+import net.minecraftforge.eventbus.api.Event;
 import net.minecraftforge.fml.event.IModBusEvent;
 import net.minecraftforge.fml.loading.FMLEnvironment;
 import net.minecraftforge.fml.loading.FMLLoader;
@@ -32,6 +32,7 @@ import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
+
 import static net.minecraftforge.fml.Logging.CORE;
 import static net.minecraftforge.fml.Logging.LOADING;
 
@@ -71,68 +72,60 @@ import static net.minecraftforge.fml.Logging.LOADING;
  *     and completes the mod loading sequence.</dd>
  * </dl>
  */
-public class ModLoader {
+public class ModLoader
+{
     private static final Logger LOGGER = LogManager.getLogger();
+    private static ModLoader INSTANCE;
     private final LoadingModList loadingModList;
 
     private final List<ModLoadingException> loadingExceptions;
-    private final Set<IModInfo> erroredModInfos;
     private final List<ModLoadingWarning> loadingWarnings;
     private final ModStateManager stateManager;
-    private static boolean loadingStateValid;
-    private final Consumer<String> statusConsumer = StartupNotificationManager.modLoaderConsumer().orElse(msg -> {});
+    private boolean loadingStateValid;
+    @SuppressWarnings("OptionalUsedAsFieldOrParameterType")
+    private final Optional<Consumer<String>> statusConsumer = StartupNotificationManager.modLoaderConsumer();
     private final Set<IModLoadingState> completedStates = new HashSet<>();
     private ModList modList;
 
-    private ModLoader() {
-        var loadingModList = this.loadingModList = FMLLoader.getLoadingModList();
-        var loadingExceptions = this.loadingExceptions = loadingModList.getErrors().stream()
+    private ModLoader()
+    {
+        INSTANCE = this;
+        this.loadingModList = FMLLoader.getLoadingModList();
+        this.loadingExceptions = FMLLoader.getLoadingModList().getErrors().stream()
                 .flatMap(ModLoadingException::fromEarlyException)
                 .collect(Collectors.toList());
-        this.loadingWarnings = loadingModList.getBrokenFiles().stream()
+        this.loadingWarnings = FMLLoader.getLoadingModList().getBrokenFiles().stream()
                 .map(file -> new ModLoadingWarning(null, ModLoadingStage.VALIDATE, InvalidModIdentifier.identifyJarProblem(file.getFilePath()).orElse("fml.modloading.brokenfile"), file.getFileName()))
                 .collect(Collectors.toList());
-        if (loadingExceptions.isEmpty()) {
-            this.erroredModInfos = Collections.emptySet();
-        } else {
-            this.erroredModInfos = Collections.newSetFromMap(new IdentityHashMap<>());
-            this.erroredModInfos.addAll(loadingExceptions.stream().map(ModLoadingException::getModInfo).toList());
-        }
-        loadingModList.getModFiles().stream()
+        FMLLoader.getLoadingModList().getModFiles().stream()
                 .filter(ModFileInfo::missingLicense)
-                .filter(modFileInfo -> modFileInfo.getMods().stream().noneMatch(this.erroredModInfos::contains)) //Ignore files where any other mod already encountered an error
+                .filter(modFileInfo -> modFileInfo.getMods().stream().noneMatch(thisModInfo -> this.loadingExceptions.stream().map(ModLoadingException::getModInfo).anyMatch(otherInfo -> otherInfo == thisModInfo))) //Ignore files where any other mod already encountered an error
                 .map(modFileInfo -> new ModLoadingException(null, ModLoadingStage.VALIDATE, "fml.modloading.missinglicense", null, modFileInfo.getFile()))
                 .forEach(this.loadingExceptions::add);
         this.stateManager = new ModStateManager();
         CrashReportCallables.registerCrashCallable("ModLauncher", FMLLoader::getLauncherInfo);
         CrashReportCallables.registerCrashCallable("ModLauncher launch target", FMLLoader::launcherHandlerName);
         CrashReportCallables.registerCrashCallable("ModLauncher naming", FMLLoader::getNaming);
-        CrashReportCallables.registerCrashCallable("ModLauncher services", ModLoader::computeModLauncherServiceList);
-        CrashReportCallables.registerCrashCallable("FML Language Providers", ModLoader::computeLanguageList);
+        CrashReportCallables.registerCrashCallable("ModLauncher services", this::computeModLauncherServiceList);
+        CrashReportCallables.registerCrashCallable("FML Language Providers", this::computeLanguageList);
     }
 
-    private static String computeLanguageList() {
-        return "\n" + FMLLoader.getLanguageLoadingProvider()
-                .applyForEach(lp -> lp.name() + '@' + lp.getClass().getPackage().getImplementationVersion())
-                .collect(Collectors.joining("\n\t\t", "\t\t", ""));
+    private String computeLanguageList() {
+        return "\n"+FMLLoader.getLanguageLoadingProvider().applyForEach(lp->lp.name() +"@"+ lp.getClass().getPackage().getImplementationVersion()).collect(Collectors.joining("\n\t\t", "\t\t", ""));
     }
 
-    private static String computeModLauncherServiceList() {
+    private String computeModLauncherServiceList() {
         final List<Map<String, String>> mods = FMLLoader.modLauncherModList();
-        return "\n" + mods.stream().map(mod -> mod.getOrDefault("file","nofile") +
-                ' ' + mod.getOrDefault("name", "missing") +
-                ' ' + mod.getOrDefault("type","NOTYPE") +
-                ' ' + mod.getOrDefault("description", "")).
+        return "\n"+mods.stream().map(mod->mod.getOrDefault("file","nofile")+
+                " "+mod.getOrDefault("name", "missing")+
+                " "+mod.getOrDefault("type","NOTYPE")+
+                " "+mod.getOrDefault("description", "")).
                 collect(Collectors.joining("\n\t\t","\t\t",""));
     }
 
-    public static ModLoader get() {
-        return LazyInit.INSTANCE;
-    }
-
-    private static final class LazyInit {
-        private static final ModLoader INSTANCE = new ModLoader();
-        private LazyInit() {}
+    public static ModLoader get()
+    {
+        return INSTANCE == null ? INSTANCE = new ModLoader() : INSTANCE;
     }
 
     /**
@@ -149,23 +142,21 @@ public class ModLoader {
         final ModList modList = ModList.of(loadingModList.getModFiles().stream().map(ModFileInfo::getFile).toList(),
                 loadingModList.getMods());
         if (!this.loadingExceptions.isEmpty()) {
-            LOGGER.fatal(CORE, "Error during pre-loading phase", loadingExceptions.getFirst());
-            statusConsumer.accept("ERROR DURING MOD LOADING");
+            LOGGER.fatal(CORE, "Error during pre-loading phase", loadingExceptions.get(0));
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
             modList.setLoadedMods(Collections.emptyList());
             loadingStateValid = false;
             throw new LoadingFailedException(loadingExceptions);
         }
-        var failedBounds = new ArrayList<ForgeFeature.Bound>();
-        for (var mod : loadingModList.getMods()) {
-            for (var feature : mod.getForgeFeatures()) {
-                if (!ForgeFeature.testFeature(FMLEnvironment.dist, feature))
-                    failedBounds.add(feature);
-            }
-        }
+        List<? extends ForgeFeature.Bound> failedBounds = loadingModList.getMods().stream()
+                .map(ModInfo::getForgeFeatures)
+                .flatMap(Collection::stream)
+                .filter(bound -> !ForgeFeature.testFeature(FMLEnvironment.dist, bound))
+                .toList();
 
         if (!failedBounds.isEmpty()) {
             LOGGER.fatal(CORE, "Failed to validate feature bounds for mods: {}", failedBounds);
-            statusConsumer.accept("ERROR DURING MOD LOADING");
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
             modList.setLoadedMods(Collections.emptyList());
             loadingStateValid = false;
             throw new LoadingFailedException(failedBounds.stream()
@@ -173,79 +164,38 @@ public class ModLoader {
                     .toList());
         }
 
-        final var modContainers = new HashMap<String, ModContainer>();
-        for (var file : loadingModList.getModFiles()) {
-            var containers = this.buildMods(file.getFile());
-            for (var container : containers)
-                modContainers.put(container.getModId(), container);
-        }
-
+        final List<ModContainer> modContainers = loadingModList.getModFiles().stream()
+                .map(ModFileInfo::getFile)
+                .map(this::buildMods)
+                .<ModContainer>mapMulti(Iterable::forEach)
+                .toList();
         if (!loadingExceptions.isEmpty()) {
-            LOGGER.fatal(CORE, "Failed to initialize mod containers", loadingExceptions.getFirst());
-            statusConsumer.accept("ERROR DURING MOD LOADING");
+            LOGGER.fatal(CORE, "Failed to initialize mod containers", loadingExceptions.get(0));
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
             modList.setLoadedMods(Collections.emptyList());
             loadingStateValid = false;
             throw new LoadingFailedException(loadingExceptions);
         }
-
-        // Gather all dependencies, so we can make sure they have finished their transition events before we fire ours
-        for (var mod : modContainers.values()) {
-            for (var dep : mod.getModInfo().getDependencies()) {
-                var target = modContainers.get(dep.getModId());
-                if (target == null)
-                    continue;
-
-                switch (dep.getOrdering()) {
-                    case AFTER:
-                        mod.dependencies.add(target);
-                        break;
-                    case BEFORE:
-                        target.dependencies.add(mod);
-                        break;
-                    default:
-                        break;
-                }
-            }
-        }
-
-        modList.setLoadedMods(modContainers.values().stream().toList());
+        modList.setLoadedMods(modContainers);
         this.modList = modList;
         var stateList = stateManager.getStates(ModLoadingPhase.GATHER);
-        var progress = StartupMessageManager.addProgressBar("Mod Gather", stateList.stream().mapToInt(mls -> mls.size().applyAsInt(this.modList)).sum());
-        for (IModLoadingState mls : stateList) {
-            dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress);
-        }
+        var progress = StartupMessageManager.addProgressBar("Mod Gather", stateList.stream().mapToInt(mls -> mls.size().applyAsInt(modList)).sum());
+        stateList.forEach(mls->dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress));
         progress.complete();
     }
 
     public void loadMods(final ModWorkManager.DrivenExecutor syncExecutor, final Executor parallelExecutor, final Runnable periodicTask) {
         var stateList = stateManager.getStates(ModLoadingPhase.LOAD);
         var progress = StartupMessageManager.addProgressBar("Mod Loading", stateList.stream().mapToInt(mls -> mls.size().applyAsInt(modList)).sum());
-        for (IModLoadingState mls : stateList) {
-            dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress);
-        }
+        stateList.forEach(mls->dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress));
         progress.complete();
     }
 
     public void finishMods(final ModWorkManager.DrivenExecutor syncExecutor, final Executor parallelExecutor, final Runnable periodicTask) {
         var stateList = stateManager.getStates(ModLoadingPhase.COMPLETE);
         var progress = StartupMessageManager.addProgressBar("Mod Complete", stateList.stream().mapToInt(mls -> mls.size().applyAsInt(modList)).sum());
-        for (IModLoadingState mls : stateList) {
-            dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress);
-        }
-
-        var modBusGroups = Set.of(
-                modList.getLoadedMods().stream()
-                        .map(ModContainer::getModBusGroup)
-                        .filter(Objects::nonNull)
-                        .toArray(BusGroup[]::new)
-        );
-        for (var modBusGroup : modBusGroups) {
-            parallelExecutor.execute(modBusGroup::trim);
-        }
-        parallelExecutor.execute(BusGroup.DEFAULT::trim);
-
-        statusConsumer.accept("Mod loading complete - %d mods loaded".formatted(this.modList.size()));
+        stateList.forEach(mls->dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress));
+        statusConsumer.ifPresent(c->c.accept(String.format("Mod loading complete - %d mods loaded", this.modList.size())));
         progress.complete();
     }
 
@@ -254,73 +204,65 @@ public class ModLoader {
             LOGGER.error("Cowardly refusing to process mod state change request from {}", state);
             return;
         }
-        progressBar.label(progressBar.name() + " working");
+        progressBar.label(progressBar.name()+ " working");
         syncExecutor.drive(ticker);
-
-        var inlineRunnable = state.inlineRunnable().orElse(null);
-        if (inlineRunnable != null) handleInlineTransition(inlineRunnable, state, syncExecutor, ticker);
-
-        var transition = state.buildTransition(syncExecutor, parallelExecutor, progressBar).orElse(null);
-        if (transition != null) waitForTransition(state, syncExecutor, ticker, transition);
-
+        state.inlineRunnable().ifPresent(a->this.handleInlineTransition(a, state, syncExecutor, ticker));
+        state.buildTransition(syncExecutor, parallelExecutor, progressBar).ifPresent(t->waitForTransition(state, syncExecutor, ticker, t));
         completedStates.add(state);
     }
 
     private void handleInlineTransition(final Consumer<ModList> transition, final IModLoadingState state, final ModWorkManager.DrivenExecutor syncExecutor, final Runnable ticker) {
-        var pb = StartupMessageManager.addProgressBar("State transition " + state.name() + " running", 0);
+        var pb = StartupMessageManager.addProgressBar("State transition " +state.name()+" running", 0);
         syncExecutor.drive(ticker);
         transition.accept(this.modList);
         syncExecutor.drive(ticker);
         pb.complete();
         syncExecutor.drive(ticker);
     }
-
     private void waitForTransition(final IModLoadingState state, final ModWorkManager.DrivenExecutor syncExecutor, final Runnable ticker, final CompletableFuture<Void> transition) {
         while (!transition.isDone()) {
             syncExecutor.drive(ticker);
         }
-
         try {
             transition.join();
         } catch (CompletionException e) {
             loadingStateValid = false;
             Throwable t = e.getCause();
-            boolean hasNotModLoadingEx = Arrays.stream(t.getSuppressed())
-                    .anyMatch(obj -> !(obj instanceof ModLoadingException));
-            if (hasNotModLoadingEx) {
+            final List<Throwable> notModLoading = Arrays.stream(t.getSuppressed())
+                    .filter(obj -> !(obj instanceof ModLoadingException))
+                    .collect(Collectors.toList());
+            if (!notModLoading.isEmpty()) {
                 LOGGER.fatal("Encountered non-modloading exceptions!", e);
-                statusConsumer.accept("ERROR DURING MOD LOADING");
+                statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
                 throw e;
             }
 
             final List<ModLoadingException> modLoadingExceptions = Arrays.stream(t.getSuppressed())
                     .filter(ModLoadingException.class::isInstance)
                     .map(ModLoadingException.class::cast)
-                    .toList();
+                    .collect(Collectors.toList());
             LOGGER.fatal(LOADING,"Failed to complete lifecycle event {}, {} errors found", state.name(), modLoadingExceptions.size());
-            statusConsumer.accept("ERROR DURING MOD LOADING");
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
             throw new LoadingFailedException(modLoadingExceptions);
         }
     }
 
-    private List<ModContainer> buildMods(final IModFile modFile) {
-        final Map<String, IModInfo> modInfoMap = new HashMap<>();
-        for (var mod : modFile.getModFileInfo().getMods())
-            modInfoMap.put(mod.getModId(), mod);
+    private List<ModContainer> buildMods(final IModFile modFile)
+    {
+        final Map<String, IModInfo> modInfoMap = modFile.getModFileInfo().getMods().stream().collect(Collectors.toMap(IModInfo::getModId, Function.identity()));
 
         LOGGER.trace(LOADING, "ModContainer is {}", ModContainer.class.getClassLoader());
-        final List<ModContainer> containers = new ArrayList<>();
-        for (var entry : modFile.getScanResult().getTargets().entrySet()) {
-            var container = buildModContainerFromTOML(modFile, modInfoMap, entry.getKey(), entry.getValue());
-            if (container != null)
-                containers.add(container);
-        }
-
+        final List<ModContainer> containers = modFile.getScanResult().getTargets()
+                .entrySet()
+                .stream()
+                .map(e -> buildModContainerFromTOML(modFile, modInfoMap, e))
+                .filter(Objects::nonNull)
+                .collect(Collectors.toList());
         if (containers.size() != modInfoMap.size()) {
-            var modIds = modInfoMap.values().stream().map(IModInfo::getModId).sorted().toList();
-            var containerIds = containers.stream().map(c -> c != null ? c.getModId() : "(null)").sorted().toList();
+            var modIds = modInfoMap.values().stream().map(IModInfo::getModId).sorted().collect(Collectors.toList());
+            var containerIds = containers.stream().map(c -> c != null ? c.getModId() : "(null)").sorted().collect(Collectors.toList());
 
-            LOGGER.fatal(LOADING, "File {} constructed {} mods: {}, but had {} mods specified: {}",
+            LOGGER.fatal(LOADING,"File {} constructed {} mods: {}, but had {} mods specified: {}",
                     modFile.getFilePath(),
                     containers.size(), containerIds,
                     modInfoMap.size(), modIds);
@@ -335,20 +277,17 @@ public class ModLoader {
 
             loadingExceptions.add(new ModLoadingException(null, ModLoadingStage.CONSTRUCT, "fml.modloading.missingclasses", null, modFile.getFilePath()));
         }
-
         // remove errored mod containers
-        return containers.stream().filter(mc -> mc.modLoadingStage != ModLoadingStage.ERROR).toList();
+        return containers.stream().filter(mc -> mc.modLoadingStage != ModLoadingStage.ERROR).collect(Collectors.toList());
     }
 
-    private ModContainer buildModContainerFromTOML(final IModFile modFile, final Map<String, IModInfo> modInfoMap,
-        final String modId, final IModLanguageProvider.IModLanguageLoader languageLoader
-    ) {
+    private ModContainer buildModContainerFromTOML(final IModFile modFile, final Map<String, IModInfo> modInfoMap, final Map.Entry<String, ? extends IModLanguageProvider.IModLanguageLoader> idToProviderEntry) {
         try {
-            IModInfo info = modInfoMap.get(modId);
-            // throw a missing metadata error if there is no matching modid in the modInfoMap from the mods.toml file
-            if (info == null)
-                throw new ModLoadingException(null, ModLoadingStage.CONSTRUCT, "fml.modloading.missingmetadata", null, modId);
-
+            final String modId = idToProviderEntry.getKey();
+            final IModLanguageProvider.IModLanguageLoader languageLoader = idToProviderEntry.getValue();
+            IModInfo info = Optional.ofNullable(modInfoMap.get(modId)).
+                    // throw a missing metadata error if there is no matching modid in the modInfoMap from the mods.toml file
+                    orElseThrow(()->new ModLoadingException(null, ModLoadingStage.CONSTRUCT, "fml.modloading.missingmetadata", null, modId));
             return languageLoader.loadMod(info, modFile.getScanResult(), FMLLoader.getGameLayer());
         } catch (ModLoadingException mle) {
             // exceptions are caught and added to the error list for later handling
@@ -363,73 +302,59 @@ public class ModLoader {
      * and don't want to cause extraneous crashes due to trying to do things that aren't possible in a "broken load"
      */
     public static boolean isLoadingStateValid() {
-        return loadingStateValid;
+        return get().loadingStateValid;
     }
 
-    /** @deprecated Use {@link #hasCompletedState(IModLoadingState)} instead */
-    @Deprecated(forRemoval = true)
     public boolean hasCompletedState(final String stateName) {
         IModLoadingState state = stateManager.findState(stateName);
         return completedStates.contains(state);
     }
 
-    public boolean hasCompletedState(IModLoadingState state) {
-        return completedStates.contains(state);
-    }
-
-    public static <T extends IModBusEvent> void runEventGenerator(Function<ModContainer, T> generator) {
+    public <T extends Event & IModBusEvent> void runEventGenerator(Function<ModContainer, T> generator) {
         if (!loadingStateValid) {
             LOGGER.error("Cowardly refusing to send event generator to a broken mod state");
             return;
         }
-        for (var mod : ModList.get().getLoadedMods())
-            mod.acceptEvent(generator.apply(mod));
+        ModList.get().forEachModInOrder(mc -> mc.acceptEvent(generator.apply(mc)));
     }
 
-    public static <T extends IModBusEvent> void postEvent(T e) {
+    public <T extends Event & IModBusEvent> void postEvent(T e) {
         if (!loadingStateValid) {
             LOGGER.error("Cowardly refusing to send event {} to a broken mod state", e.getClass().getName());
             return;
         }
-        for (var mod : ModList.get().getLoadedMods())
-            mod.acceptEvent(e);
+        ModList.get().forEachModInOrder(mc -> mc.acceptEvent(e));
     }
-
-    public static <T extends IModBusEvent> T postEventWithReturn(T e) {
+    public <T extends Event & IModBusEvent> T postEventWithReturn(T e) {
         if (!loadingStateValid) {
             LOGGER.error("Cowardly refusing to send event {} to a broken mod state", e.getClass().getName());
             return e;
         }
-        for (var mod : ModList.get().getLoadedMods())
-            mod.acceptEvent(e);
+        ModList.get().forEachModInOrder(mc -> mc.acceptEvent(e));
         return e;
     }
-
-    @SuppressWarnings("removal")
-    public static <T extends IModBusEvent> void postEventWrapContainerInModOrder(T event) {
-        postEventWithWrapInModOrder(event,
-            (mc, e) -> ModLoadingContext.get().setActiveContainer(mc),
-            (mc, e) -> ModLoadingContext.get().setActiveContainer(null)
-        );
+    public <T extends Event & IModBusEvent> void postEventWrapContainerInModOrder(T event) {
+        postEventWithWrapInModOrder(event, (mc, e) -> ModLoadingContext.get().setActiveContainer(mc), (mc, e) -> ModLoadingContext.get().setActiveContainer(null));
     }
-
-    public static <T extends IModBusEvent> void postEventWithWrapInModOrder(T e, BiConsumer<ModContainer, T> pre, BiConsumer<ModContainer, T> post) {
+    public <T extends Event & IModBusEvent> void postEventWithWrapInModOrder(T e, BiConsumer<ModContainer, T> pre, BiConsumer<ModContainer, T> post) {
         if (!loadingStateValid) {
             LOGGER.error("Cowardly refusing to send event {} to a broken mod state", e.getClass().getName());
             return;
         }
-        for (var mod : ModList.get().getLoadedMods()) {
-            pre.accept(mod, e);
-            mod.acceptEvent(e);
-            post.accept(mod, e);
-        }
+        ModList.get().forEachModInOrder(mc -> {
+            pre.accept(mc, e);
+            mc.acceptEvent(e);
+            post.accept(mc, e);
+        });
     }
 
-    public List<ModLoadingWarning> getWarnings() {
+    public List<ModLoadingWarning> getWarnings()
+    {
         return ImmutableList.copyOf(this.loadingWarnings);
     }
 
-    public void addWarning(ModLoadingWarning warning) {
+    public void addWarning(ModLoadingWarning warning)
+    {
         this.loadingWarnings.add(warning);
     }
 
@@ -439,7 +364,7 @@ public class ModLoader {
         return runningDataGen;
     }
 
-    private static final class ErroredModContainer extends ModContainer {
+    private static class ErroredModContainer extends ModContainer {
         public ErroredModContainer() {
             super();
         }

fmlcore/src/main/java/net/minecraftforge/fml/ModLoadingContext.java

@@ -8,63 +8,38 @@ package net.minecraftforge.fml;
 import com.mojang.logging.LogUtils;
 import net.minecraftforge.fml.config.IConfigSpec;
 import net.minecraftforge.fml.config.ModConfig;
+import net.minecraftforge.fml.loading.FMLLoader;
 import org.slf4j.Logger;
-import java.util.function.BiPredicate;
+import org.slf4j.LoggerFactory;
+
 import java.util.function.Supplier;
 
-public class ModLoadingContext {
+public class ModLoadingContext
+{
     private static final Logger LOGGER = LogUtils.getLogger();
     private static final ThreadLocal<ModLoadingContext> context = ThreadLocal.withInitial(ModLoadingContext::new);
-    private ModContainer activeContainer;
     private Object languageExtension;
+    private ModLoadingStage stage;
 
-    /**
-     * @deprecated Use the context provided by your language loader in your mod's constructor. Example for Java mods: {@snippet :
-     * @Mod("examplemod")
-     * public final class ExampleMod {
-     *      public ExampleMod(FMLJavaModLoadingContext context) {
-     *           // Use context from the param instead of FMLJavaModLoadingContext.get() or ModLoadingContext.get()
-     *      }
-     * }}
-     */
-    @Deprecated(forRemoval = true, since="1.21.1")
     public static ModLoadingContext get() {
         return context.get();
     }
 
-    /**
-     * @deprecated Going to be moved to ForgeHooks for Internal use.
-     */
-    @Deprecated(forRemoval = true, since="1.21.1")
+    private ModContainer activeContainer;
+
     public void setActiveContainer(final ModContainer container) {
         this.activeContainer = container;
         this.languageExtension = container == null ? null : container.contextExtension.get();
     }
 
-    /**
-     * Going to be moved to ForgeHooks for Internal use.
-     * @deprecated Override/Use {@link ModLoadingContext#getContainer()}
-     */
-    @Deprecated(forRemoval = true, since="1.21.1")
     public ModContainer getActiveContainer() {
         return activeContainer == null ? ModList.get().getModContainerById("minecraft").orElseThrow(()->new RuntimeException("Where is minecraft???!")) : activeContainer;
     }
 
-    /**
-     * @deprecated Going to be moved to ForgeHooks for Internal use.
-     */
-    @Deprecated(forRemoval = true, since="1.21.1")
     public String getActiveNamespace() {
         return activeContainer == null ? "minecraft" : activeContainer.getNamespace();
     }
 
-    /**
-     * @return {@link ModLoadingContext#getActiveContainer()} by default.
-     */
-    public ModContainer getContainer() {
-        return getActiveContainer();
-    }
-
     /**
      * Register an {@link IExtensionPoint} with the mod container.
      * @param point The extension point to register
@@ -72,67 +47,29 @@ public class ModLoadingContext {
      * @param <T> The type signature of the extension operator
      */
     public <T extends Record & IExtensionPoint<T>> void registerExtensionPoint(Class<? extends IExtensionPoint<T>> point, Supplier<T> extension) {
-        getContainer().registerExtensionPoint(point, extension);
-    }
-
-    /**
-     * Register a {@link IExtensionPoint.DisplayTest} with the mod container.
-     * <p>A shorthand for registering a DisplayTest with {@link #registerExtensionPoint(Class, Supplier)}.</p>
-     * @param displayTest The {@link IExtensionPoint.DisplayTest} to register
-     */
-    public void registerDisplayTest(IExtensionPoint.DisplayTest displayTest) {
-        getContainer().registerDisplayTest(() -> displayTest);
-    }
-
-    /**
-     * Register a {@link IExtensionPoint.DisplayTest} with the mod container.
-     * <p>A shorthand for registering a DisplayTest supplier with {@link #registerExtensionPoint(Class, Supplier)}.</p>
-     * @param displayTest The {@link Supplier<IExtensionPoint.DisplayTest>} to register
-     */
-    public void registerDisplayTest(Supplier<IExtensionPoint.DisplayTest> displayTest) {
-        getContainer().registerDisplayTest(displayTest);
-    }
-
-    /**
-     * Register a {@link IExtensionPoint.DisplayTest} with the mod container.
-     * <p>A shorthand for registering a DisplayTest with {@link #registerExtensionPoint(Class, Supplier)} that also
-     * creates the DisplayTest instance for you using the provided parameters.</p>
-     * @see IExtensionPoint.DisplayTest#DisplayTest(String, BiPredicate)
-     */
-    public void registerDisplayTest(String version, BiPredicate<String, Boolean> remoteVersionTest) {
-        getContainer().registerDisplayTest(new IExtensionPoint.DisplayTest(version, remoteVersionTest));
-    }
-
-    /**
-     * Register a {@link IExtensionPoint.DisplayTest} with the mod container.
-     * <p>A shorthand for registering a DisplayTest with {@link #registerExtensionPoint(Class, Supplier)} that also
-     * creates the DisplayTest instance for you using the provided parameters.</p>
-     * @see IExtensionPoint.DisplayTest#DisplayTest(Supplier, BiPredicate)
-     */
-    public void registerDisplayTest(Supplier<String> suppliedVersion, BiPredicate<String, Boolean> remoteVersionTest) {
-        getContainer().registerDisplayTest(new IExtensionPoint.DisplayTest(suppliedVersion, remoteVersionTest));
+        getActiveContainer().registerExtensionPoint(point, extension);
     }
 
     public void registerConfig(ModConfig.Type type, IConfigSpec<?> spec) {
         if (spec.isEmpty())
         {
             // This handles the case where a mod tries to register a config, without any options configured inside it.
-            LOGGER.debug("Attempted to register an empty config for type {} on mod {}", type, getContainer().getModId());
+            LOGGER.debug("Attempted to register an empty config for type {} on mod {}", type, getActiveContainer().getModId());
             return;
         }
 
-        getContainer().addConfig(new ModConfig(type, spec, getContainer()));
+        getActiveContainer().addConfig(new ModConfig(type, spec, getActiveContainer()));
     }
 
     public void registerConfig(ModConfig.Type type, IConfigSpec<?> spec, String fileName) {
         if (spec.isEmpty())
         {
             // This handles the case where a mod tries to register a config, without any options configured inside it.
-            LOGGER.debug("Attempted to register an empty config for type {} on mod {} using file name {}", type, getContainer().getModId(), fileName);
+            LOGGER.debug("Attempted to register an empty config for type {} on mod {} using file name {}", type, getActiveContainer().getModId(), fileName);
             return;
         }
 
-        getContainer().addConfig(new ModConfig(type, spec, getContainer(), fileName));
+        getActiveContainer().addConfig(new ModConfig(type, spec, getActiveContainer(), fileName));
     }
 
 

fmlcore/src/main/java/net/minecraftforge/fml/ModLoadingState.java

@@ -5,9 +5,10 @@
 
 package net.minecraftforge.fml;
 
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.fml.event.IModBusEvent;
 import net.minecraftforge.fml.loading.progress.ProgressMeter;
 
-import java.util.Objects;
 import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Executor;
@@ -25,27 +26,20 @@ import java.util.function.ToIntFunction;
  * @param inlineRunnable an optional runnable, which runs before starting the transition from this state to the next
  * @param transition     optional state transition information
  */
-public record ModLoadingState(
-    String name,
-    String previous,
-    Function<ModList, String> message,
-    ToIntFunction<ModList> size,
-    ModLoadingPhase phase,
-    Optional<Consumer<ModList>> inlineRunnable,
-    Optional<IModStateTransition> transition
-) implements IModLoadingState {
+public record ModLoadingState(String name, String previous,
+                              Function<ModList, String> message,
+                              ToIntFunction<ModList> size,
+                              ModLoadingPhase phase,
+                              Optional<Consumer<ModList>> inlineRunnable,
+                              Optional<IModStateTransition> transition) implements IModLoadingState {
     @Override
-    public Optional<CompletableFuture<Void>> buildTransition(
-        final Executor syncExecutor,
-        final Executor parallelExecutor,
-        final ProgressMeter progressBar,
-        final Function<Executor, CompletableFuture<Void>> preSyncTask,
-        final Function<Executor, CompletableFuture<Void>> postSyncTask
-    ) {
-        var transition = this.transition.orElse(null);
-        return transition == null
-                ? Optional.empty()
-                : Optional.ofNullable(transition.build(name, syncExecutor, parallelExecutor, progressBar, preSyncTask, postSyncTask));
+    public <T extends Event & IModBusEvent>
+    Optional<CompletableFuture<Void>> buildTransition(final Executor syncExecutor,
+                                                      final Executor parallelExecutor,
+                                                      final ProgressMeter progressBar,
+                                                      final Function<Executor, CompletableFuture<Void>> preSyncTask,
+                                                      final Function<Executor, CompletableFuture<Void>> postSyncTask) {
+        return transition.map(t -> t.build(name, syncExecutor, parallelExecutor, progressBar, preSyncTask, postSyncTask));
     }
 
     /**
@@ -55,12 +49,9 @@ public record ModLoadingState(
      * @param name     the name of the state
      * @param previous the name of the immediately previous state to this state
      * @param phase    the mod loading phase the state belongs to
-     *
-     * @deprecated Use the builder
      */
-    @Deprecated(since = "1.21.3", forRemoval = true)
     public static ModLoadingState empty(final String name, final String previous, final ModLoadingPhase phase) {
-        return new ModLoadingState(name, previous, ml -> "", ml -> 0, phase, Optional.empty(), Optional.empty());
+        return new ModLoadingState(name, previous, ml -> "", f->0, phase, Optional.empty(), Optional.empty());
     }
 
     /**
@@ -71,13 +62,11 @@ public record ModLoadingState(
      * @param previous   the name of the immediately previous state to this state
      * @param phase      the mod loading phase the state belongs to
      * @param transition the state transition information
-     *
-     * @deprecated Use the builder
+     * @return a mod loading state with state transition information and a default message
      */
-    @Deprecated(since = "1.21.3", forRemoval = true)
     public static ModLoadingState withTransition(final String name, final String previous, final ModLoadingPhase phase,
                                                  final IModStateTransition transition) {
-        return of(name, phase).after(previous).withTransition(transition);
+        return new ModLoadingState(name, previous, ml -> "Processing transition " + name, ModList::size, phase, Optional.empty(), Optional.of(transition));
     }
 
     /**
@@ -89,14 +78,11 @@ public record ModLoadingState(
      * @param phase      the mod loading phase the state belongs to
      * @param transition the state transition information
      * @return a mod loading state with state transition information and a custom message
-     *
-     * @deprecated Use the builder
      */
-    @Deprecated(since = "1.21.3", forRemoval = true)
     public static ModLoadingState withTransition(final String name, final String previous,
                                                  final Function<ModList, String> message, final ModLoadingPhase phase,
                                                  final IModStateTransition transition) {
-        return of(name, phase).after(previous).message(message).withTransition(transition);
+        return new ModLoadingState(name, previous, message, ModList::size, phase, Optional.empty(), Optional.of(transition));
     }
 
     /**
@@ -108,75 +94,9 @@ public record ModLoadingState(
      * @param phase    the mod loading phase the state belongs to
      * @param inline   an optional runnable, which runs before starting the transition from this state to the next
      * @return a mod loading state with an inline runnable and default message
-     *
-     * @deprecated Use the builder
      */
-    @Deprecated(since = "1.21.3", forRemoval = true)
     public static ModLoadingState withInline(final String name, final String previous, final ModLoadingPhase phase,
                                              final Consumer<ModList> inline) {
-        return of(name, phase).after(previous).withInline(inline);
-    }
-
-    public static Builder of(final String name, final ModLoadingPhase phase) {
-        return new Builder(name, phase);
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        return o instanceof ModLoadingState that
-                && this.phase == that.phase
-                && this.name.equals(that.name)
-                && Objects.equals(this.previous, that.previous);
-    }
-
-    @Override
-    public int hashCode() {
-        int result = phase.hashCode();
-        result = 31 * result + name.hashCode();
-        result = 31 * result + Objects.hashCode(previous);
-        return result;
-    }
-
-    public static class Builder {
-        private final String name;
-        private final ModLoadingPhase phase;
-        private String after;
-        private Function<ModList, String> message = null;
-        private ToIntFunction<ModList> size = null;
-
-        private Builder(final String name, final ModLoadingPhase phase) {
-            this.name = name;
-            this.phase = phase;
-        }
-
-        public Builder after(final ModLoadingState value) { return after(value.name()); }
-        public Builder after(final String value) {
-            this.after = value;
-            return this;
-        }
-
-        public Builder message(final String value) { return message(ml -> value); }
-        public Builder message(final Function<ModList, String> value) {
-            this.message = value;
-            return this;
-        }
-
-        public Builder size(final int value) { return size(ml -> value); }
-        public Builder size(final ToIntFunction<ModList> value) {
-            this.size = value;
-            return this;
-        }
-
-        public ModLoadingState empty() {
-            return new ModLoadingState(name, after, message != null ? message : ml -> "", size != null ? size : ml -> 0, phase, Optional.empty(), Optional.empty());
-        }
-
-        public ModLoadingState withTransition(final IModStateTransition transition) {
-            return new ModLoadingState(name, after, message != null ? message : ml -> "Processing transition " + name, size != null ? size : ModList::size, phase, Optional.empty(), Optional.of(transition));
-        }
-
-        public ModLoadingState withInline(final Consumer<ModList> inline) {
-            return new ModLoadingState(name, after, message != null ? message : ml -> "Processing work " + name, size != null ? size : ml -> 0, phase, Optional.of(inline), Optional.empty());
-        }
+        return new ModLoadingState(name, previous, ml -> "Processing work " + name, ml->0, phase, Optional.of(inline), Optional.empty());
     }
 }

fmlcore/src/main/java/net/minecraftforge/fml/ModLoadingWarning.java

@@ -12,7 +12,8 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Stream;
 
-public class ModLoadingWarning {
+public class ModLoadingWarning
+{
     /**
      * Mod Info for mod with warning
      */

fmlcore/src/main/java/net/minecraftforge/fml/ModStateManager.java

@@ -16,13 +16,15 @@ import java.util.stream.Collectors;
 
 @SuppressWarnings("UnstableApiUsage")
 public class ModStateManager {
+    static ModStateManager INSTANCE;
     private final EnumMap<ModLoadingPhase, List<IModLoadingState>> stateMap;
 
     public ModStateManager() {
+        INSTANCE = this;
         final var sp = ServiceLoader.load(FMLLoader.getGameLayer(), IModStateProvider.class);
         this.stateMap = ServiceLoaderUtils.streamWithErrorHandling(sp, sce->{})
                 .map(IModStateProvider::getAllStates)
-                .flatMap(List::stream)
+                .<IModLoadingState>mapMulti(Iterable::forEach)
                 .collect(Collectors.groupingBy(IModLoadingState::phase, ()->new EnumMap<>(ModLoadingPhase.class), Collectors.toUnmodifiableList()));
     }
 
@@ -34,20 +36,16 @@ public class ModStateManager {
         var dummy = ModLoadingState.empty("", "", phase);
         nodes.forEach(graph::addNode);
         graph.addNode(dummy);
-        for (IModLoadingState node : nodes) {
-            graph.putEdge(lookup.getOrDefault(node.previous(), dummy), node);
-        }
+        nodes.forEach(n->graph.putEdge(lookup.getOrDefault(n.previous(), dummy), n));
         return TopologicalSort.topologicalSort(graph, Comparator.comparingInt(nodes::indexOf)).stream().filter(st->st!=dummy).toList();
     }
 
     public IModLoadingState findState(final String stateName) {
-        var result = stateMap.values()
+        return stateMap.values()
                 .stream()
-                .flatMap(List::stream)
+                .flatMap(Collection::stream)
                 .filter(mls -> mls.name().equals(stateName))
                 .findFirst()
-                .orElse(null);
-        if (result != null) return result;
-        else throw new IllegalArgumentException("Unknown IModLoadingState: " + stateName);
+                .orElseThrow(() -> new IllegalArgumentException("Unknown IModLoadingState: " + stateName));
     }
 }

fmlcore/src/main/java/net/minecraftforge/fml/ModStateTransitionHelper.java

@@ -1,184 +0,0 @@
-/*
- * Copyright (c) Forge Development LLC and contributors
- * SPDX-License-Identifier: LGPL-2.1-only
- */
-
-package net.minecraftforge.fml;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Objects;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.CompletionException;
-import java.util.concurrent.CompletionStage;
-import java.util.concurrent.Executor;
-import java.util.function.BiFunction;
-import java.util.function.Function;
-
-import org.jetbrains.annotations.ApiStatus;
-
-import net.minecraftforge.fml.IModStateTransition.EventGenerator;
-import net.minecraftforge.fml.event.IModBusEvent;
-import net.minecraftforge.fml.loading.progress.ProgressMeter;
-
-@ApiStatus.Internal
-class ModStateTransitionHelper {
-    static final IModStateTransition NOOP = new NoopTransition();
-    record NoopTransition() implements IModStateTransition {
-        @Override
-        public ThreadSelector threadSelector() {
-            return ThreadSelector.SYNC;
-        }
-
-        @Override
-        public BiFunction<Executor, CompletableFuture<Void>, CompletableFuture<Void>> finalActivityGenerator() {
-            return (e, t) -> t.thenApplyAsync(Function.identity(), e);
-        }
-    }
-
-    static <V> CompletionStage<Void> completableFutureFromExceptionList(List<FutureResult<V>> t) {
-        if (t.stream().noneMatch(e -> e.exception() != null)) {
-            return CompletableFuture.completedFuture(null);
-        } else {
-            final var throwables = t.stream().map(FutureResult::exception).filter(Objects::nonNull).toList();
-            CompletableFuture<Void> cf = new CompletableFuture<>();
-            final RuntimeException accumulator = new RuntimeException();
-            cf.completeExceptionally(accumulator);
-            for (Throwable exception : throwables) {
-                if (exception instanceof CompletionException) {
-                    exception = exception.getCause();
-                }
-                if (exception.getSuppressed().length != 0) {
-                    for (Throwable throwable : exception.getSuppressed()) {
-                        accumulator.addSuppressed(throwable);
-                    }
-                } else {
-                    accumulator.addSuppressed(exception);
-                }
-            }
-            return cf;
-        }
-    }
-
-    record FutureResult<V>(V value, Throwable exception){}
-
-    static <V> CompletableFuture<List<FutureResult<V>>> gather(Collection<? extends CompletableFuture<? extends V>> futures) {
-        var list = new ArrayList<FutureResult<V>>(futures.size());
-        var results = new CompletableFuture[futures.size()];
-
-        for (var future : futures) {
-            int i = list.size();
-            list.add(null);
-            @SuppressWarnings("unchecked") // Bypass a weird javac error with generic by forcing it to be the exact type we want.
-            var raw = ((CompletableFuture<V>)future);
-            results[i] = raw.whenComplete((result, exception) -> list.set(i, new FutureResult<>(result, exception)));
-        }
-
-        return CompletableFuture.allOf(results).handle((r, th)->null).thenApply(res -> list);
-    }
-
-    private static <T extends IModBusEvent> void addCompletableFutureTaskForModDispatch(
-        final IModStateTransition transition,
-        final Executor executor,
-        final List<CompletableFuture<Void>> completableFutures,
-        final ProgressMeter progressBar,
-        final EventGenerator<T> eventGenerator,
-        final BiFunction<ModLoadingStage, Throwable, ModLoadingStage> nextState
-     ) {
-
-        @SuppressWarnings("removal")
-        var preDispatchHook = getHook(transition.preDispatchHook(), executor, eventGenerator);
-        if (preDispatchHook != null)
-            completableFutures.add(preDispatchHook);
-
-        var modFutures = new LinkedHashMap<String, CompletableFuture<Void>>();
-        for (var mod : ModList.get().getLoadedMods()) {
-
-            CompletableFuture<Void> parent = null;
-            if (mod.dependencies.isEmpty()) {
-                parent = CompletableFuture.allOf();
-            } else {
-                var deps = new CompletableFuture[mod.dependencies.size()];
-                int idx = 0;
-                for (var depContainer : mod.dependencies) {
-                    var future = modFutures.get(depContainer.getModId());
-                    if (future == null)
-                        throw new IllegalStateException("Could not find dependency future " + depContainer.getModId() + " for " + mod.getModId());
-                    deps[idx++] = future;
-                }
-                parent = CompletableFuture.allOf(deps);
-            }
-
-            @SuppressWarnings("removal")
-            var dispatch = parent
-                .thenRunAsync(() -> {
-                    ModLoadingContext.get().setActiveContainer(mod);
-                    var handler = mod.activityMap.get(mod.modLoadingStage);
-                    if (handler != null)
-                        handler.run();
-                    mod.acceptEvent(eventGenerator.apply(mod));
-                }, executor)
-                .whenComplete((mc, exception) -> {
-                    mod.modLoadingStage = nextState.apply(mod.modLoadingStage, exception);
-                    progressBar.increment();
-                    ModLoadingContext.get().setActiveContainer(null);
-                });
-
-            modFutures.put(mod.getModId(), dispatch);
-        }
-
-        var dispatch = gather(modFutures.values()).thenComposeAsync(ModStateTransitionHelper::completableFutureFromExceptionList, executor);
-        completableFutures.add(dispatch);
-
-        @SuppressWarnings("removal")
-        var postDispatchHook = getHook(transition.preDispatchHook(), executor, eventGenerator);
-        if (postDispatchHook != null)
-            completableFutures.add(postDispatchHook);
-    }
-
-    private static <T extends IModBusEvent> CompletableFuture<Void> getHook(BiFunction<Executor, ? extends EventGenerator<?>, CompletableFuture<Void>> hook, Executor executor, EventGenerator<T> eventGenerator) {
-        if (hook == null || hook == IModStateTransition.NULL_HOOK) return null;
-        @SuppressWarnings("unchecked")
-        var hookTyped = (BiFunction<Executor, EventGenerator<T>, CompletableFuture<Void>>)hook;
-        return hookTyped.apply(executor, eventGenerator);
-    }
-
-    static <T extends IModBusEvent> CompletableFuture<Void> build(
-        final IModStateTransition transition,
-        final String name,
-        final Executor syncExecutor,
-        final Executor parallelExecutor,
-        final ProgressMeter progressBar,
-        final Function<Executor, CompletableFuture<Void>> preSyncTask,
-        final Function<Executor, CompletableFuture<Void>> postSyncTask
-    ) {
-        List<CompletableFuture<Void>> futures = new ArrayList<>();
-        final var executor = transition.threadSelector().apply(syncExecutor, parallelExecutor);
-
-        @SuppressWarnings({ "removal", "unchecked" })
-        var events = transition.eventFunctionStream().get().map(f -> (EventGenerator<T>)f).toList();
-        for (int x = 0; x < events.size(); x++) {
-            var gen = events.get(x);
-            BiFunction<ModLoadingStage, Throwable, ModLoadingStage> state = x == events.size() - 1
-                ? transition.nextModLoadingStage()
-                : ModLoadingStage::currentState;
-            addCompletableFutureTaskForModDispatch(transition, executor, futures, progressBar, gen, state);
-        }
-
-        final CompletableFuture<Void> preSyncTaskCF = preSyncTask.apply(syncExecutor);
-        final CompletableFuture<Void> eventDispatchCF = gather(futures).thenCompose(ModStateTransitionHelper::completableFutureFromExceptionList);
-        final CompletableFuture<Void> postEventDispatchCF = preSyncTaskCF
-            .thenApplyAsync(n -> {
-                progressBar.label(progressBar.name() + ": dispatching " + name);
-                return null;
-            }, parallelExecutor)
-            .thenComposeAsync(n -> eventDispatchCF, parallelExecutor)
-            .thenApply(r -> {
-                postSyncTask.apply(syncExecutor);
-                return null;
-            });
-        return transition.finalActivityGenerator().apply(syncExecutor, postEventDispatchCF);
-    }
-}

fmlcore/src/main/java/net/minecraftforge/fml/ModWorkManager.java

@@ -17,7 +17,6 @@ import static net.minecraftforge.fml.Logging.LOADING;
 public class ModWorkManager {
     private static final Logger LOGGER = LogManager.getLogger();
     private static final long PARK_TIME = TimeUnit.MILLISECONDS.toNanos(1);
-
     public interface DrivenExecutor extends Executor {
         boolean selfDriven();
         boolean driveOne();
@@ -34,11 +33,8 @@ public class ModWorkManager {
             }
         }
     }
-
-    private record SyncExecutor(ConcurrentLinkedDeque<Runnable> tasks) implements DrivenExecutor {
-        public SyncExecutor() {
-            this(new ConcurrentLinkedDeque<>());
-        }
+    private static class SyncExecutor implements DrivenExecutor {
+        private ConcurrentLinkedDeque<Runnable> tasks = new ConcurrentLinkedDeque<>();
 
         @Override
         public boolean driveOne() {
@@ -60,7 +56,13 @@ public class ModWorkManager {
         }
     }
 
-    private record WrappingExecutor(Executor wrapped) implements DrivenExecutor {
+    private static class WrappingExecutor implements DrivenExecutor {
+        private final Executor wrapped;
+
+        public WrappingExecutor(final Executor executor) {
+            this.wrapped = executor;
+        }
+
         @Override
         public boolean selfDriven() {
             return true;
@@ -77,9 +79,11 @@ public class ModWorkManager {
         }
     }
 
-    private static final SyncExecutor syncExecutor = new SyncExecutor();
+    private static SyncExecutor syncExecutor;
 
     public static DrivenExecutor syncExecutor() {
+        if (syncExecutor == null)
+            syncExecutor = new SyncExecutor();
         return syncExecutor;
     }
 
@@ -87,8 +91,14 @@ public class ModWorkManager {
         return new WrappingExecutor(executor);
     }
 
+    private static ForkJoinPool parallelThreadPool;
     public static Executor parallelExecutor() {
-        return LazyInit.PARALLEL_EXECUTOR;
+        if (parallelThreadPool == null) {
+            final int loadingThreadCount = FMLConfig.getIntConfigValue(FMLConfig.ConfigValue.MAX_THREADS);
+            LOGGER.debug(LOADING, "Using {} threads for parallel mod-loading", loadingThreadCount);
+            parallelThreadPool = new ForkJoinPool(loadingThreadCount, ModWorkManager::newForkJoinWorkerThread, null, false);
+        }
+        return parallelThreadPool;
     }
 
     private static ForkJoinWorkerThread newForkJoinWorkerThread(ForkJoinPool pool) {
@@ -99,14 +109,4 @@ public class ModWorkManager {
         return thread;
     }
 
-    private static final class LazyInit {
-        private LazyInit() {}
-        private static final ForkJoinPool PARALLEL_EXECUTOR;
-
-        static {
-            final int loadingThreadCount = FMLConfig.getIntConfigValue(FMLConfig.ConfigValue.MAX_THREADS);
-            LOGGER.debug(LOADING, "Using {} threads for parallel mod-loading", loadingThreadCount);
-            PARALLEL_EXECUTOR = new ForkJoinPool(loadingThreadCount, ModWorkManager::newForkJoinWorkerThread, null, false);
-        }
-    }
 }

fmlcore/src/main/java/net/minecraftforge/fml/OptionalMod.java

@@ -23,7 +23,7 @@ public final class OptionalMod<T>
         return new OptionalMod<>(modId);
     }
 
-    private static final OptionalMod<?> EMPTY = new OptionalMod<>(true);
+    private static OptionalMod<?> EMPTY = new OptionalMod<>(true);
     private static <T> OptionalMod<T> empty() {
         @SuppressWarnings("unchecked")
         OptionalMod<T> t = (OptionalMod<T>) EMPTY;
@@ -213,8 +213,8 @@ public final class OptionalMod<T>
     public boolean equals(Object obj)
     {
         if (this == obj) return true;
-        if (obj instanceof OptionalMod<?> optionalMod) {
-            return Objects.equals(optionalMod.modId, modId);
+        if (obj instanceof OptionalMod) {
+            return Objects.equals(((OptionalMod)obj).modId, modId);
         }
         return false;
     }

fmlcore/src/main/java/net/minecraftforge/fml/VersionChecker.java

@@ -7,6 +7,7 @@ package net.minecraftforge.fml;
 
 import com.google.gson.Gson;
 import net.minecraftforge.fml.loading.FMLConfig;
+import net.minecraftforge.fml.loading.FMLLoader;
 import net.minecraftforge.forgespi.language.IModInfo;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -34,72 +35,81 @@ import java.util.zip.GZIPInputStream;
 
 import static net.minecraftforge.fml.VersionChecker.Status.*;
 
-public class VersionChecker {
+public class VersionChecker
+{
     private static final Logger LOGGER = LogManager.getLogger();
     private static final int MAX_HTTP_REDIRECTS = Integer.getInteger("http.maxRedirects", 20);
     private static final int HTTP_TIMEOUT_SECS = Integer.getInteger("http.timeoutSecs", 15);
 
-    public enum Status {
+    public enum Status
+    {
         PENDING(),
         FAILED(),
         UP_TO_DATE(),
-        OUTDATED(3, true, true),
+        OUTDATED(3, true),
         AHEAD(),
         BETA(),
-        BETA_OUTDATED(6, true, true);
+        BETA_OUTDATED(6, true);
 
-        private final int sheetOffset;
-        private final boolean draw, animated;
+        final int sheetOffset;
+        final boolean draw, animated;
 
-        Status() {
+        Status()
+        {
             this(0, false, false);
         }
 
-        Status(int sheetOffset, boolean draw, boolean animated) {
+        Status(int sheetOffset)
+        {
+            this(sheetOffset, true, false);
+        }
+
+        Status(int sheetOffset, boolean animated)
+        {
+            this(sheetOffset, true, animated);
+        }
+
+        Status(int sheetOffset, boolean draw, boolean animated)
+        {
             this.sheetOffset = sheetOffset;
             this.draw = draw;
             this.animated = animated;
         }
 
-        public int getSheetOffset() {
+        public int getSheetOffset()
+        {
             return sheetOffset;
         }
 
-        public boolean shouldDraw() {
+        public boolean shouldDraw()
+        {
             return draw;
         }
 
-        public boolean isAnimated() {
+        public boolean isAnimated()
+        {
             return animated;
         }
 
-        public boolean isOutdated() {
-            return this == OUTDATED || this == BETA_OUTDATED;
-        }
     }
 
     public record CheckResult(VersionChecker.Status status, ComparableVersion target, Map<ComparableVersion, String> changes, String url) {}
 
-    public static void startVersionCheck() {
-        new Thread("Forge Version Check") {
+    public static void startVersionCheck()
+    {
+        new Thread("Forge Version Check")
+        {
             private HttpClient client;
-            private String mcVersion;
-            private String agent;
 
             @Override
-            public void run() {
-                if (!FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.VERSION_CHECK)) {
+            public void run()
+            {
+                if (!FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.VERSION_CHECK))
+                {
                     LOGGER.info("Global Forge version check system disabled, no further processing.");
                     return;
                 }
 
-                var mc = ModList.get().getModContainerById("minecraft");
-                var forge = ModList.get().getModContainerById("forge");
-                this.mcVersion = mc.get().getModInfo().getVersion().toString();
-
-                this.agent = "Java-http-client/" + System.getProperty("java.version")
-                    + " MinecraftForge/" + mcVersion + '-' + forge.get().getModInfo().getVersion();
-
                 client = HttpClient.newBuilder().connectTimeout(Duration.ofSeconds(HTTP_TIMEOUT_SECS)).build();
                 gatherMods().forEach(this::process);
             }
@@ -109,9 +119,15 @@ public class VersionChecker {
              */
             private String openUrlString(URL url, IModInfo mod) throws IOException, URISyntaxException, InterruptedException {
                 URL currentUrl = url;
-                var userAgent = this.agent + ' ' + mod.getModId() + '/' + mod.getVersion();
 
-                for (int redirects = 0; redirects < MAX_HTTP_REDIRECTS; redirects++) {
+                final StringBuilder sb = new StringBuilder();
+                sb.append("Java-http-client/").append(System.getProperty("java.version")).append(' ');
+                sb.append("MinecraftForge/").append(FMLLoader.versionInfo().mcAndForgeVersion()).append(' ');
+                sb.append(mod.getModId()).append('/').append(mod.getVersion());
+                final String userAgent = sb.toString();
+
+                for (int redirects = 0; redirects < MAX_HTTP_REDIRECTS; redirects++)
+                {
                     var request = HttpRequest.newBuilder()
                             .uri(currentUrl.toURI())
                             .timeout(Duration.ofSeconds(HTTP_TIMEOUT_SECS))
@@ -123,7 +139,8 @@ public class VersionChecker {
                     final HttpResponse<InputStream> response = client.send(request, HttpResponse.BodyHandlers.ofInputStream());
 
                     int responseCode = response.statusCode();
-                    if (responseCode >= 300 && responseCode <= 399) {
+                    if (responseCode >= 300 && responseCode <= 399)
+                    {
                         String newLocation = response.headers().firstValue("Location")
                                 .orElseThrow(() -> new IOException("Got a 3xx response code but Location header was null while trying to fetch " + url));
                         currentUrl = new URL(currentUrl, newLocation);
@@ -133,22 +150,26 @@ public class VersionChecker {
                     final boolean isGzipEncoded = response.headers().firstValue("Content-Encoding").orElse("").equals("gzip");
 
                     final String bodyStr;
-                    try (var inStream = isGzipEncoded ? new GZIPInputStream(response.body()) : response.body();
-                         var bufferedReader = new BufferedReader(new InputStreamReader(inStream))
-                    ) {
-                        bodyStr = bufferedReader.lines().collect(Collectors.joining("\n"));
+                    try (InputStream inStream = isGzipEncoded ? new GZIPInputStream(response.body()) : response.body())
+                    {
+                        try (var bufferedReader = new BufferedReader(new InputStreamReader(inStream)))
+                        {
+                            bodyStr = bufferedReader.lines().collect(Collectors.joining("\n"));
+                        }
                     }
                     return bodyStr;
                 }
                 throw new IOException("Too many redirects while trying to fetch " + url);
             }
 
-            private void process(IModInfo mod) {
+            private void process(IModInfo mod)
+            {
                 Status status = PENDING;
                 ComparableVersion target = null;
                 Map<ComparableVersion, String> changes = null;
                 String display_url = null;
-                try {
+                try
+                {
                     if (mod.getUpdateURL().isEmpty()) return;
                     URL url = mod.getUpdateURL().get();
                     LOGGER.info("[{}] Starting version check at {}", mod.getModId(), url.toString());
@@ -157,40 +178,54 @@ public class VersionChecker {
 
                     LOGGER.debug("[{}] Received version check data:\n{}", mod.getModId(), data);
 
+
                     @SuppressWarnings("unchecked")
                     Map<String, Object> json = new Gson().fromJson(data, Map.class);
                     @SuppressWarnings("unchecked")
                     Map<String, String> promos = (Map<String, String>)json.get("promos");
                     display_url = (String)json.get("homepage");
 
+                    var mcVersion = FMLLoader.versionInfo().mcVersion();
                     String rec = promos.get(mcVersion + "-recommended");
                     String lat = promos.get(mcVersion + "-latest");
                     ComparableVersion current = new ComparableVersion(mod.getVersion().toString());
 
-                    if (rec != null) {
+                    if (rec != null)
+                    {
                         ComparableVersion recommended = new ComparableVersion(rec);
                         int diff = recommended.compareTo(current);
 
                         if (diff == 0)
                             status = UP_TO_DATE;
-                        else if (diff < 0) {
+                        else if (diff < 0)
+                        {
                             status = AHEAD;
-                            if (lat != null) {
+                            if (lat != null)
+                            {
                                 ComparableVersion latest = new ComparableVersion(lat);
-                                if (current.compareTo(latest) < 0) {
+                                if (current.compareTo(latest) < 0)
+                                {
                                     status = OUTDATED;
                                     target = latest;
                                 }
                             }
-                        } else {
+                        }
+                        else
+                        {
                             status = OUTDATED;
                             target = recommended;
                         }
-                    } else if (lat != null) {
+                    }
+                    else if (lat != null)
+                    {
                         ComparableVersion latest = new ComparableVersion(lat);
-                        status = current.compareTo(latest) < 0 ? BETA_OUTDATED : BETA;
+                        if (current.compareTo(latest) < 0)
+                            status = BETA_OUTDATED;
+                        else
+                            status = BETA;
                         target = latest;
-                    } else
+                    }
+                    else
                         status = BETA;
 
                     LOGGER.info("[{}] Found status: {} Current: {} Target: {}", mod.getModId(), status, current, target);
@@ -198,30 +233,38 @@ public class VersionChecker {
                     changes = new LinkedHashMap<>();
                     @SuppressWarnings("unchecked")
                     Map<String, String> tmp = (Map<String, String>)json.get(mcVersion);
-                    if (tmp != null) {
+                    if (tmp != null)
+                    {
                         List<ComparableVersion> ordered = new ArrayList<>();
-                        for (String key : tmp.keySet()) {
+                        for (String key : tmp.keySet())
+                        {
                             ComparableVersion ver = new ComparableVersion(key);
                             if (ver.compareTo(current) > 0 && (target == null || ver.compareTo(target) < 1))
+                            {
                                 ordered.add(ver);
+                            }
                         }
                         Collections.sort(ordered);
 
-                        for (ComparableVersion ver : ordered) {
+                        for (ComparableVersion ver : ordered)
+                        {
                             changes.put(ver, tmp.get(ver.toString()));
                         }
                     }
-                } catch (Exception e) {
+                }
+                catch (Exception e)
+                {
                     LOGGER.warn("Failed to process update information", e);
                     status = FAILED;
                 }
-                RESULTS.put(mod, new CheckResult(status, target, changes, display_url));
+                results.put(mod, new CheckResult(status, target, changes, display_url));
             }
         }.start();
     }
 
     // Gather a list of mods that have opted in to this update system by providing a URL.
-    private static List<IModInfo> gatherMods() {
+    private static List<IModInfo> gatherMods()
+    {
         List<IModInfo> ret = new LinkedList<>();
         for (IModInfo info : ModList.get().getMods()) {
             if (info.getUpdateURL().isPresent())
@@ -230,10 +273,12 @@ public class VersionChecker {
         return ret;
     }
 
-    private static final Map<IModInfo, CheckResult> RESULTS = new ConcurrentHashMap<>();
+    private static Map<IModInfo, CheckResult> results = new ConcurrentHashMap<>();
     private static final CheckResult PENDING_CHECK = new CheckResult(PENDING, null, null, null);
 
-    public static CheckResult getResult(IModInfo mod) {
-        return RESULTS.getOrDefault(mod, PENDING_CHECK);
+    public static CheckResult getResult(IModInfo mod)
+    {
+        return results.getOrDefault(mod, PENDING_CHECK);
     }
+
 }

fmlcore/src/main/java/net/minecraftforge/fml/config/ConfigFileTypeHandler.java

@@ -14,7 +14,6 @@ import com.mojang.logging.LogUtils;
 import net.minecraftforge.fml.loading.FMLConfig;
 import net.minecraftforge.fml.loading.FMLPaths;
 import org.apache.commons.io.FilenameUtils;
-import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 
 import java.io.IOException;
@@ -26,66 +25,9 @@ import static net.minecraftforge.fml.config.ConfigTracker.CONFIG;
 
 public class ConfigFileTypeHandler {
     private static final Logger LOGGER = LogUtils.getLogger();
+    static ConfigFileTypeHandler TOML = new ConfigFileTypeHandler();
     private static final Path defaultConfigPath = FMLPaths.GAMEDIR.get().resolve(FMLConfig.getConfigValue(FMLConfig.ConfigValue.DEFAULT_CONFIG_PATH));
 
-    private static final ConfigFileTypeHandler CLIENT = new ConfigFileTypeHandler(ModConfig.Type.CLIENT);
-    private static final ConfigFileTypeHandler COMMON = new ConfigFileTypeHandler(ModConfig.Type.COMMON);
-    private static final ConfigFileTypeHandler SERVER = new ConfigFileTypeHandler(ModConfig.Type.SERVER);
-
-    private final @Nullable ModConfig.Type type;
-    private @Nullable FileWatcher watcher;
-
-    // exists for bin compat
-    public ConfigFileTypeHandler() {
-        this(null);
-    }
-
-    private ConfigFileTypeHandler(@Nullable ModConfig.Type type) {
-        this.type = type;
-    }
-
-    /**
-     * Gets the handler for the given {@link ModConfig.Type}.
-     *
-     * @param type The type to get the handler for
-     * @return The handler
-     */
-    static ConfigFileTypeHandler get(ModConfig.Type type) {
-        return switch (type) {
-            case CLIENT -> CLIENT;
-            case COMMON -> COMMON;
-            case SERVER -> SERVER;
-        };
-    }
-
-    /**
-     * Gets the {@link FileWatcher} for this handler, creating it if it doesn't exist and/or has been stopped.
-     *
-     * @return The watcher
-     *
-     * @apiNote This is package-private so modders can't just call {@link FileWatcher#stop()} and fuck up everything.
-     */
-    FileWatcher getWatcher() {
-        if (this.watcher == null) {
-            LOGGER.debug(CONFIG, "Starting watcher for handler: {}", this);
-            this.watcher = new FileWatcher();
-        }
-
-        return this.watcher;
-    }
-
-    /**
-     * Stops the {@link FileWatcher} for this handler, and sets it to null afterward. Use this instead of
-     * {@link FileWatcher#stop()}.
-     */
-    void stopWatcher() {
-        if (this.watcher == null) return;
-
-        LOGGER.debug(CONFIG, "Stopping watcher for hander: {}", this);
-        this.watcher.stop();
-        this.watcher = null;
-    }
-
     public Function<ModConfig, CommentedFileConfig> reader(Path configBasePath) {
         return (c) -> {
             final Path configPath = configBasePath.resolve(c.getFileName());
@@ -95,7 +37,7 @@ public class ConfigFileTypeHandler {
                     onFileNotFound((newfile, configFormat)-> setupConfigFile(c, newfile, configFormat)).
                     writingMode(WritingMode.REPLACE).
                     build();
-            LOGGER.debug(CONFIG, "Built TOML config for {}", configPath);
+            LOGGER.debug(CONFIG, "Built TOML config for {}", configPath.toString());
             try
             {
                 configData.load();
@@ -104,9 +46,13 @@ public class ConfigFileTypeHandler {
             {
                 throw new ConfigLoadingException(c, ex);
             }
-            LOGGER.debug(CONFIG, "Loaded TOML config file {}", configPath);
-            this.getWatcher().addWatch(configPath, new ConfigWatcher(c, configData, Thread.currentThread().getContextClassLoader()));
-            LOGGER.debug(CONFIG, "Watching TOML config file {} for changes", configPath);
+            LOGGER.debug(CONFIG, "Loaded TOML config file {}", configPath.toString());
+            try {
+                FileWatcher.defaultInstance().addWatch(configPath, new ConfigWatcher(c, configData, Thread.currentThread().getContextClassLoader()));
+                LOGGER.debug(CONFIG, "Watching TOML config file {} for changes", configPath.toString());
+            } catch (IOException e) {
+                throw new RuntimeException("Couldn't watch config file", e);
+            }
             return configData;
         };
     }
@@ -114,16 +60,14 @@ public class ConfigFileTypeHandler {
     public void unload(Path configBasePath, ModConfig config) {
         Path configPath = configBasePath.resolve(config.getFileName());
         try {
-            this.getWatcher().removeWatch(configPath);
+            FileWatcher.defaultInstance().removeWatch(configBasePath.resolve(config.getFileName()));
         } catch (RuntimeException e) {
-            LOGGER.error("Failed to remove config {} from tracker!", configPath, e);
+            LOGGER.error("Failed to remove config {} from tracker!", configPath.toString(), e);
         }
     }
 
-    private static boolean setupConfigFile(final ModConfig modConfig, final Path file, final ConfigFormat<?> conf) throws IOException {
-        if (!Files.isDirectory(file.getParent())) {
-            Files.createDirectories(file.getParent());
-        }
+    private boolean setupConfigFile(final ModConfig modConfig, final Path file, final ConfigFormat<?> conf) throws IOException {
+        Files.createDirectories(file.getParent());
         Path p = defaultConfigPath.resolve(modConfig.getFileName());
         if (Files.exists(p)) {
             LOGGER.info(CONFIG, "Loading default config file from path {}", p);
@@ -167,16 +111,17 @@ public class ConfigFileTypeHandler {
         }
     }
 
-    @Override
-    public String toString() {
-        return "ConfigFileTypeHandler[" + (type != null ? type : "UNKNOWN") + "]";
-    }
+    private static class ConfigWatcher implements Runnable {
+        private final ModConfig modConfig;
+        private final CommentedFileConfig commentedFileConfig;
+        private final ClassLoader realClassLoader;
+
+        ConfigWatcher(final ModConfig modConfig, final CommentedFileConfig commentedFileConfig, final ClassLoader classLoader) {
+            this.modConfig = modConfig;
+            this.commentedFileConfig = commentedFileConfig;
+            this.realClassLoader = classLoader;
+        }
 
-    private record ConfigWatcher(
-            ModConfig modConfig,
-            CommentedFileConfig commentedFileConfig,
-            ClassLoader realClassLoader
-    ) implements Runnable {
         @Override
         public void run() {
             // Force the regular classloader onto the special thread

fmlcore/src/main/java/net/minecraftforge/fml/config/ConfigTracker.java

@@ -8,9 +8,6 @@ package net.minecraftforge.fml.config;
 import com.electronwill.nightconfig.core.CommentedConfig;
 import com.electronwill.nightconfig.core.file.CommentedFileConfig;
 import com.mojang.logging.LogUtils;
-import net.minecraftforge.api.distmarker.Dist;
-import net.minecraftforge.fml.DistExecutor;
-import net.minecraftforge.fml.loading.FMLPaths;
 import org.slf4j.Logger;
 import org.slf4j.Marker;
 import org.slf4j.MarkerFactory;
@@ -50,32 +47,15 @@ public class ConfigTracker {
 
     public void loadConfigs(ModConfig.Type type, Path configBasePath) {
         LOGGER.debug(CONFIG, "Loading configs type {}", type);
-        for (ModConfig config : this.configSets.get(type)) {
-            openConfig(config, configBasePath);
-        }
+        this.configSets.get(type).forEach(config -> openConfig(config, configBasePath));
     }
 
-    // TODO: [FML] This is only called for the server (outside of forceUnload)
-    // rethink config implementation for eventual FML rewrite
     public void unloadConfigs(ModConfig.Type type, Path configBasePath) {
         LOGGER.debug(CONFIG, "Unloading configs type {}", type);
-        for (ModConfig config : this.configSets.get(type)) {
-            closeConfig(config, configBasePath);
-        }
-        ConfigFileTypeHandler.get(type).stopWatcher();
+        this.configSets.get(type).forEach(config -> closeConfig(config, configBasePath));
     }
 
-    // If there is a better way to do this, please tell me. Because this is FUCKED
-    public void forceUnload() {
-        // This is how ModStateProvider handles loading configs. So we're doing the same but with unloadConfigs instead
-        DistExecutor.unsafeRunWhenOn(Dist.CLIENT, () -> () -> this.unloadConfigs(ModConfig.Type.CLIENT, FMLPaths.CONFIGDIR.get()));
-        this.unloadConfigs(ModConfig.Type.COMMON, FMLPaths.CONFIGDIR.get());
-
-        // just in case server watcher is still alive somehow...
-        ConfigFileTypeHandler.get(ModConfig.Type.SERVER).stopWatcher();
-    }
-
-    private static void openConfig(final ModConfig config, final Path configBasePath) {
+    private void openConfig(final ModConfig config, final Path configBasePath) {
         LOGGER.trace(CONFIG, "Loading config file type {} at {} for {}", config.getType(), config.getFileName(), config.getModId());
         final CommentedFileConfig configData = config.getHandler().reader(configBasePath).apply(config);
         config.setConfigData(configData);
@@ -83,7 +63,7 @@ public class ConfigTracker {
         config.save();
     }
 
-    private static void closeConfig(final ModConfig config, final Path configBasePath) {
+    private void closeConfig(final ModConfig config, final Path configBasePath) {
         if (config.getConfigData() != null) {
             LOGGER.trace(CONFIG, "Closing config file type {} at {} for {}", config.getType(), config.getFileName(), config.getModId());
             // stop the filewatcher before we save the file and close it, so reload doesn't fire

fmlcore/src/main/java/net/minecraftforge/fml/config/IConfigEvent.java

@@ -5,7 +5,7 @@
 
 package net.minecraftforge.fml.config;
 
-import net.minecraftforge.eventbus.api.event.InheritableEvent;
+import net.minecraftforge.eventbus.api.Event;
 import net.minecraftforge.fml.Bindings;
 
 import java.util.function.Function;
@@ -29,7 +29,7 @@ public interface IConfigEvent {
     ModConfig getConfig();
 
     @SuppressWarnings("unchecked")
-    default <T extends InheritableEvent & IConfigEvent> T self() {
+    default <T extends Event & IConfigEvent> T self() {
         return (T) this;
     }
 }

fmlcore/src/main/java/net/minecraftforge/fml/config/ModConfig.java

@@ -24,13 +24,14 @@ public class ModConfig
     private final ModContainer container;
     private final ConfigFileTypeHandler configHandler;
     private CommentedConfig configData;
+    private Callable<Void> saveHandler;
 
     public ModConfig(final Type type, final IConfigSpec<?> spec, final ModContainer container, final String fileName) {
         this.type = type;
         this.spec = spec;
         this.fileName = fileName;
         this.container = container;
-        this.configHandler = ConfigFileTypeHandler.get(type);
+        this.configHandler = ConfigFileTypeHandler.TOML;
         ConfigTracker.INSTANCE.trackConfig(this);
     }
 

fmlcore/src/main/java/net/minecraftforge/fml/event/IModBusEvent.java

@@ -5,33 +5,8 @@
 
 package net.minecraftforge.fml.event;
 
-import net.minecraftforge.eventbus.api.bus.BusGroup;
-import net.minecraftforge.eventbus.api.bus.EventBus;
-import net.minecraftforge.eventbus.api.event.InheritableEvent;
-import org.jspecify.annotations.NonNull;
-
 /**
- * Marker interface for mod lifecycle events dispatched on the
- * {@linkplain net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext#getModBusGroup() mod BusGroup} instead
- * of the {@linkplain BusGroup#DEFAULT default BusGroup}.
- *
- * @apiNote Each mod gets its own unique mod BusGroup instance, obtained from the mod loading context. Most events
- *          should go on the default BusGroup.
+ * Marker interface for events dispatched on the ModLifecycle event bus instead of the primary event bus
  */
-public interface IModBusEvent extends InheritableEvent {
-    /**
-     * @param modEventBusGroup Obtained from {@link net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext#getModBusGroup()} or your language provider's equivalent.
-     * @param eventClass The event type you want to get the associated bus for.
-     */
-    static <T extends IModBusEvent> @NonNull EventBus<@NonNull T> getBus(@NonNull BusGroup modEventBusGroup, @NonNull Class<T> eventClass) {
-        // Do not copy! Temporary solution until the FML rewrite is complete. May throw in future
-        // without prior notice.
-        //
-        // Mods creating their own events should directly assign the result of the create method to a
-        // static final field in their event class, without wrapping or calling multiple times.
-        //
-        // Mods using existing events should instead use the existing static final BUS field in the
-        // event class (for most events) or getBus(BusGroup) method (for mod bus events).
-        return EventBus.create(modEventBusGroup, eventClass);
-    }
+public interface IModBusEvent {
 }

fmlcore/src/main/java/net/minecraftforge/fml/util/thread/EffectiveSide.java

@@ -7,11 +7,8 @@ package net.minecraftforge.fml.util.thread;
 
 import net.minecraftforge.fml.LogicalSide;
 
-/**
- * Attempts to determine the effect side of the current thread, based on know threads in networking.
- * This is not guaranteed to be correct, and modders should use other methods to determine the logical side when possible.
- */
-public class EffectiveSide {
+public class EffectiveSide
+{
     public static LogicalSide get() {
         final ThreadGroup group = Thread.currentThread().getThreadGroup();
         return group instanceof SidedThreadGroup ? ((SidedThreadGroup) group).getSide() : LogicalSide.CLIENT;

fmlcore/src/main/java/net/minecraftforge/fml/util/thread/SidedThreadGroups.java

@@ -7,13 +7,11 @@ package net.minecraftforge.fml.util.thread;
 
 import net.minecraftforge.fml.LogicalSide;
 
-public final class SidedThreadGroups {
+public final class SidedThreadGroups
+{
     public static final SidedThreadGroup CLIENT = new SidedThreadGroup(LogicalSide.CLIENT);
     public static final SidedThreadGroup SERVER = new SidedThreadGroup(LogicalSide.SERVER);
 
-    public static SidedThreadGroup get(boolean client) {
-        return client ? CLIENT : SERVER;
+    private SidedThreadGroups() {
     }
-
-    private SidedThreadGroups() { }
 }

fmlearlydisplay/build.gradle

@@ -1,117 +1,93 @@
-import org.gradle.api.plugins.jvm.JvmTestSuite
+plugins {
+    id 'com.github.ben-manes.versions'
+    id 'org.javamodularity.moduleplugin' version '1.8.7' apply false
+    id 'org.cadixdev.licenser'
+}
+apply plugin: 'java-library'
+apply plugin: 'jacoco'
+apply plugin: 'org.javamodularity.moduleplugin'
+
 import org.gradle.internal.os.OperatingSystem
 
-plugins {
-    id 'java-library'
-    id 'jvm-test-suite'
-    id 'maven-publish'
-    alias libs.plugins.licenser
-    alias libs.plugins.gradleutils
-    alias libs.plugins.gitversion
-    alias libs.plugins.changelog
-    id 'net.minecraftforge.forge.build.convention'
-}
-
 switch (OperatingSystem.current()) {
-    case OperatingSystem.LINUX:
-        project.ext.lwjglNatives = "natives-linux"
-        break
-    case OperatingSystem.MAC_OS:
-        project.ext.lwjglNatives = "natives-macos"
-        break
-    case OperatingSystem.WINDOWS:
-        project.ext.lwjglNatives = "natives-windows"
-        break
+	case OperatingSystem.LINUX:
+		project.ext.lwjglNatives = "natives-linux"
+		break
+	case OperatingSystem.MAC_OS:
+		project.ext.lwjglNatives = "natives-macos"
+		break
+	case OperatingSystem.WINDOWS:
+		project.ext.lwjglNatives = "natives-windows"
+		break
 }
 
-gradleutils.displayName = 'FML Early Display'
-final vendor = 'Forge Development LLC'
-description = 'A pretty looking, but prone to erroring screen displayed during Forge loading.'
 
-java {
-    toolchain.languageVersion = JavaLanguageVersion.of(javaVersion)
-    withSourcesJar()
+dependencyUpdates.rejectVersionIf { isNonStable(it.candidate.version) }
+
+java.withSourcesJar()
+
+dependencies {
+    compileOnly('org.jetbrains:annotations:23.0.0')
+    implementation(project(':fmlloader'))
+    implementation(project(':fmlcore'))
+    implementation('org.lwjgl:lwjgl:3.3.1')
+    implementation('org.lwjgl:lwjgl-glfw:3.3.1')
+    implementation('org.lwjgl:lwjgl-opengl:3.3.1')
+    implementation('org.lwjgl:lwjgl-stb:3.3.1')
+    implementation('org.lwjgl:lwjgl-tinyfd:3.3.1')
+    implementation('org.slf4j:slf4j-api:1.8.0-beta4')
+    implementation("net.sf.jopt-simple:jopt-simple:${JOPT_SIMPLE_VERSION}")
+    testImplementation('org.junit.jupiter:junit-jupiter-api:5.8.2')
+    testImplementation('org.powermock:powermock-core:2.0.9')
+    testRuntimeOnly('org.junit.jupiter:junit-jupiter-engine:5.8.2')
+    testRuntimeOnly('org.slf4j:slf4j-jdk14:1.8.0-beta4')
+    testRuntimeOnly("org.lwjgl:lwjgl::$lwjglNatives")
+    testRuntimeOnly("org.lwjgl:lwjgl-glfw::$lwjglNatives")
+    testRuntimeOnly("org.lwjgl:lwjgl-opengl::$lwjglNatives")
+    testRuntimeOnly("org.lwjgl:lwjgl-stb::$lwjglNatives")
+}
+
+test {
+    useJUnitPlatform()
+}
+
+ext {
+    MANIFESTS = [
+        '': [
+            'Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
+            'Git-Commit': GIT_INFO.abbreviatedId,
+            'Git-Branch': GIT_INFO.branch,
+            'Build-Number': "${System.getenv('BUILD_NUMBER')?:0}",
+        ] as LinkedHashMap,
+        'net/minecraftforge/fml/earlydisplay/': [
+            'Specification-Title':      'FMLEarlyDisplay',
+            'Specification-Vendor':     'Forge Development LLC',
+            'Specification-Version':    '1',
+            'Implementation-Title':     'FML Early Display',
+            'Implementation-Version':   '1.0',
+            'Implementation-Vendor':    'Forge'
+        ] as LinkedHashMap
+    ]
+}
+
+jar.doFirst {
+    MANIFESTS.each { pkg, values ->
+        if (pkg == '')
+            manifest.attributes(values)
+        else
+            manifest.attributes(values, pkg)
+    }
+}
+
+tasks.withType(JavaCompile) {
+    options.compilerArgs << '-Xlint:unchecked'
 }
 
 license {
     header = rootProject.file('LICENSE-header.txt')
+    include 'net/minecraftforge/'
 }
 
-changelog {
-    from changelogBase
-}
-
-dependencies {
-    compileOnly libs.jetbrains.annotations
-
-    implementation projects.fmlloader
-    implementation projects.fmlcore
-    implementation libs.bundles.lwjgl
-    implementation earlyDisplayLibs.slf4j.api
-    implementation libs.jopt.simple
-}
-
-// See gradle/gradle#35070 (https://github.com/gradle/gradle/issues/35070)
-// We are making the list of providers first BEFORE mapping them to a provider of the resolved objects so that they can be finalized after configuration.
-var lwjglTestLibs = [
-    dependencies.variantOf(earlyDisplayTestLibs.lwjgl) { classifier lwjglNatives },
-    dependencies.variantOf(earlyDisplayTestLibs.lwjgl.glfw) { classifier lwjglNatives },
-    dependencies.variantOf(earlyDisplayTestLibs.lwjgl.opengl) { classifier lwjglNatives },
-    dependencies.variantOf(earlyDisplayTestLibs.lwjgl.stb) { classifier lwjglNatives }
-].with { list ->
-    provider { list.collect { it.get() } }
-}
-
-testing.suites.named('test', JvmTestSuite) {
-    useJUnitJupiter('5.8.2')
-
-    dependencies {
-        implementation earlyDisplayTestLibs.powermock.core
-        runtimeOnly earlyDisplayLibs.slf4j.jdk14
-        runtimeOnly.bundle lwjglTestLibs
-    }
-}
-
-tasks.withType(JavaCompile).configureEach {
-    options.compilerArgs << '-Xlint:unchecked'
-}
-
-tasks.named('jar', Jar) {
-    manifest {
-        attributes([
-            'Automatic-Module-Name': 'net.minecraftforge.earlydisplay',
-            'Forge-Module-Layer'   : 'boot'
-        ])
-        attributes([
-            'Specification-Title'   : gradleutils.displayName.get(),
-            'Specification-Vendor'  : vendor,
-            'Specification-Version' : '1',
-            'Implementation-Title'  : gradleutils.displayName.get(),
-            'Implementation-Vendor' : vendor,
-            'Implementation-Version': '1.0'
-        ], 'net/minecraftforge/fml/earlydisplay/')
-    }
-}
-
-publishing {
-    repositories {
-        maven gradleutils.publishingForgeMaven
-    }
-
-    publications.register('mavenJava', MavenPublication) {
-        changelog.publish(it)
-        gradleutils.promote(it)
-
-        from components.java
-
-        pom {
-            description = project.description
-
-            gradleutils.pom.addRemoteDetails(pom)
-
-            licenses {
-                license gradleutils.pom.licenses.LGPLv2_1
-            }
-        }
-    }
-}
+publishing.publications.mavenJava(MavenPublication) {
+    from components.java
+}

fmlearlydisplay/src/main/java/net/minecraftforge/fml/earlydisplay/DisplayWindow.java

@@ -14,7 +14,9 @@ import net.minecraftforge.fml.loading.ImmediateWindowProvider;
 import net.minecraftforge.fml.loading.progress.StartupNotificationManager;
 import org.jetbrains.annotations.Nullable;
 import org.lwjgl.PointerBuffer;
+import org.lwjgl.glfw.GLFWImage;
 import org.lwjgl.glfw.GLFWVidMode;
+import org.lwjgl.stb.STBImage;
 import org.lwjgl.system.MemoryStack;
 import org.lwjgl.system.MemoryUtil;
 import org.lwjgl.util.tinyfd.TinyFileDialogs;
@@ -22,12 +24,15 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.awt.Desktop;
+import java.io.BufferedReader;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.net.URI;
+import java.nio.ByteBuffer;
 import java.nio.file.Files;
-import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Calendar;
@@ -35,16 +40,15 @@ import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.StringJoiner;
-import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
+import java.util.function.Function;
 import java.util.function.IntConsumer;
 import java.util.function.IntSupplier;
 import java.util.function.LongSupplier;
@@ -74,7 +78,7 @@ public class DisplayWindow implements ImmediateWindowProvider {
     private static final Logger LOGGER = LoggerFactory.getLogger("EARLYDISPLAY");
     private final AtomicBoolean animationTimerTrigger = new AtomicBoolean(true);
 
-    private ColourScheme colourScheme = ColourScheme.RED;
+    private ColourScheme colourScheme;
     private ElementShader elementShader;
 
     private RenderElement.DisplayContext context;
@@ -82,20 +86,13 @@ public class DisplayWindow implements ImmediateWindowProvider {
     private int framecount;
     private EarlyFramebuffer framebuffer;
     private ScheduledFuture<?> windowTick;
-    private ScheduledFuture<?> initializationFuture;
 
     private PerformanceInfo performanceInfo;
-    @SuppressWarnings("unused")
     private ScheduledFuture<?> performanceTick;
     // The GL ID of the window. Used for all operations
     private long window;
     // The thread that contains and ticks the window while Forge is loading mods
-    private static final ScheduledExecutorService renderScheduler = Executors.newSingleThreadScheduledExecutor(r -> {
-        final var thread = Executors.defaultThreadFactory().newThread(r);
-        thread.setName("EarlyDisplay");
-        thread.setDaemon(true);
-        return thread;
-    });
+    private ScheduledExecutorService renderScheduler;
     private int fbWidth;
     private int fbHeight;
     private int fbScale;
@@ -114,13 +111,11 @@ public class DisplayWindow implements ImmediateWindowProvider {
     public String name() {
         return "fmlearlywindow";
     }
-
     @Override
     public Runnable initialize(String[] arguments) {
-        String mcVersion = FMLLoader.versionInfo().mcVersion();
-        String forgeVersion = FMLLoader.versionInfo().forgeVersion();
-
         final OptionParser parser = new OptionParser();
+        var mcversionopt = parser.accepts("fml.mcVersion").withRequiredArg().ofType(String.class);
+        var forgeversionopt = parser.accepts("fml.forgeVersion").withRequiredArg().ofType(String.class);
         var widthopt = parser.accepts("width")
                 .withRequiredArg().ofType(Integer.class)
                 .defaultsTo(FMLConfig.getIntConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_WIDTH));
@@ -135,28 +130,25 @@ public class DisplayWindow implements ImmediateWindowProvider {
         FMLConfig.updateConfig(FMLConfig.ConfigValue.EARLY_WINDOW_WIDTH, winWidth);
         FMLConfig.updateConfig(FMLConfig.ConfigValue.EARLY_WINDOW_HEIGHT, winHeight);
         fbScale = FMLConfig.getIntConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_FBSCALE);
-        if (System.getenv("FML_EARLY_WINDOW_DARK") != null) {
+        if (System.getenv("FML_EARLY_WINDOW_DARK")!= null) {
             this.colourScheme = ColourScheme.BLACK;
         } else {
             try {
-                // check the options file for the colour scheme
-                var optionLines = Files.readAllLines(FMLPaths.GAMEDIR.get().resolve(Path.of("options.txt")));
-                var keyName = "darkMojangStudiosBackground:";
-                for (String line : optionLines) {
-                    if (line.startsWith(keyName)) {
-                        this.colourScheme = line.startsWith("true", keyName.length()) ? ColourScheme.BLACK : ColourScheme.RED;
-                        break;
-                    }
-                }
-            } catch (IOException e) {
-                this.colourScheme = ColourScheme.RED; // fallback to red colourScheme
+                var optionLines = Files.readAllLines(FMLPaths.GAMEDIR.get().resolve(Paths.get("options.txt")));
+                var options = optionLines.stream().map(l -> l.split(":")).filter(a -> a.length == 2).collect(Collectors.toMap(a -> a[0], a -> a[1]));
+                var colourScheme = Boolean.parseBoolean(options.getOrDefault("darkMojangStudiosBackground", "false"));
+                this.colourScheme = colourScheme ? ColourScheme.BLACK : ColourScheme.RED;
+            } catch (IOException ioe) {
+                // No options
+                this.colourScheme = ColourScheme.RED; // default to red colourscheme
             }
         }
         this.maximized = parsed.has(maximizedopt) || FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_MAXIMIZED);
 
-        StartupNotificationManager.modLoaderConsumer().ifPresent(c->c.accept("Forge loading " + FMLLoader.versionInfo().forgeVersion()));
+        var forgeVersion = parsed.valueOf(forgeversionopt);
+        StartupNotificationManager.modLoaderConsumer().ifPresent(c->c.accept("Forge loading "+ forgeVersion));
         performanceInfo = new PerformanceInfo();
-        return start(mcVersion, forgeVersion);
+        return start(parsed.valueOf(mcversionopt), forgeVersion);
     }
 
     private static final long MINFRAMETIME = TimeUnit.MILLISECONDS.toNanos(10); // This is the FPS cap on the window - note animation is capped at 20FPS via the tickTimer
@@ -233,17 +225,17 @@ public class DisplayWindow implements ImmediateWindowProvider {
             LOGGER.error("Crash during font initialization", t);
             crashElegantly("An error occurred initializing a font for rendering. "+t.getMessage());
         }
-        this.elements = new ArrayList<>(List.of(
-            RenderElement.anvil(font),
-            RenderElement.logMessageOverlay(font),
-            RenderElement.forgeVersionOverlay(font, mcVersion + "-" + forgeVersion),
-            RenderElement.performanceBar(font),
-            RenderElement.progressBars(font)
+        this.elements = new ArrayList<>(Arrays.asList(
+                RenderElement.anvil(font),
+                RenderElement.logMessageOverlay(font),
+                RenderElement.forgeVersionOverlay(font, mcVersion+"-"+forgeVersion.split("-")[0]),
+                RenderElement.performanceBar(font),
+                RenderElement.progressBars(font)
         ));
 
         var date = Calendar.getInstance();
         if (FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_SQUIR) || (date.get(Calendar.MONTH) == Calendar.APRIL && date.get(Calendar.DAY_OF_MONTH) == 1))
-            this.elements.addFirst(RenderElement.squir());
+            this.elements.add(0, RenderElement.squir());
 
         glEnable(GL_BLEND);
         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
@@ -263,11 +255,7 @@ public class DisplayWindow implements ImmediateWindowProvider {
         glEnable(GL_BLEND);
         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 
-        for (var itr = this.elements.iterator(); itr.hasNext(); ) {
-            var element = itr.next();
-            if (!element.render(context, framecount))
-                itr.remove();
-        }
+        this.elements.removeIf(element -> !element.render(context, framecount));
         if (animationTimerTrigger.compareAndSet(true, false)) // we only increment the framecount on a periodic basis
             framecount++;
     }
@@ -276,6 +264,7 @@ public class DisplayWindow implements ImmediateWindowProvider {
     public void render(int alpha) {
         var currentVAO = glGetInteger(GL_VERTEX_ARRAY_BINDING);
         var currentFB = glGetInteger(GL_READ_FRAMEBUFFER_BINDING);
+        glfwSwapInterval(0);
         glViewport(0, 0, this.context.scaledWidth(), this.context.scaledHeight());
         RenderElement.globalAlpha = alpha;
         framebuffer.activate();
@@ -292,8 +281,13 @@ public class DisplayWindow implements ImmediateWindowProvider {
      * Start the window and Render Thread; we're ready to go.
      */
     public Runnable start(@Nullable String mcVersion, final String forgeVersion) {
+        renderScheduler = Executors.newSingleThreadScheduledExecutor(r -> {
+            final var thread = Executors.defaultThreadFactory().newThread(r);
+            thread.setDaemon(true);
+            return thread;
+        });
         initWindow(mcVersion);
-        this.initializationFuture = renderScheduler.schedule(() -> initRender(mcVersion, forgeVersion), 1, TimeUnit.MILLISECONDS);
+        renderScheduler.schedule(() -> initRender(mcVersion, forgeVersion), 1, TimeUnit.MILLISECONDS);
         return this::periodicTick;
     }
 
@@ -303,7 +297,14 @@ public class DisplayWindow implements ImmediateWindowProvider {
         return this.glVersion;
     }
 
-    private static void crashElegantly(String errorDetails) {
+    private void crashElegantly(String errorDetails) {
+        String qrText;
+        try (var is = new BufferedReader(new InputStreamReader(getClass().getResourceAsStream("/glfailure.txt")))) {
+            qrText = is.lines().collect(Collectors.joining("\n"));
+        } catch (IOException ioe) {
+            qrText = "";
+        }
+
         StringBuilder msgBuilder = new StringBuilder(2000);
         msgBuilder.append("Failed to initialize graphics window with current settings.\n");
         msgBuilder.append("\n\n");
@@ -359,15 +360,14 @@ public class DisplayWindow implements ImmediateWindowProvider {
         glfwWindowHint(GLFW_CONTEXT_CREATION_API, GLFW_NATIVE_CONTEXT_API);
         glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
         glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
-
-        String vanillaWindowTitle = "Minecraft* ";
-        if (mcVersion != null) vanillaWindowTitle += mcVersion;
-
-        // this emulates what we would get without early progress window
-        // as vanilla never sets these, so GLFW uses the first window title
-        // set them explicitly to avoid it using "FML early loading progress" as the class
-        glfwWindowHintString(GLFW_X11_CLASS_NAME, vanillaWindowTitle);
-        glfwWindowHintString(GLFW_X11_INSTANCE_NAME, vanillaWindowTitle);
+        if (mcVersion != null) {
+            // this emulates what we would get without early progress window
+            // as vanilla never sets these, so GLFW uses the first window title
+            // set them explicitly to avoid it using "FML early loading progress" as the class
+            String vanillaWindowTitle = "Minecraft* " + mcVersion;
+            glfwWindowHintString(GLFW_X11_CLASS_NAME, vanillaWindowTitle);
+            glfwWindowHintString(GLFW_X11_INSTANCE_NAME, vanillaWindowTitle);
+        }
 
         long primaryMonitor = glfwGetPrimaryMonitor();
         if (primaryMonitor == 0) {
@@ -389,8 +389,7 @@ public class DisplayWindow implements ImmediateWindowProvider {
         }, 10, TimeUnit.SECONDS);
         int versidx = 0;
         var skipVersions = FMLConfig.<String>getListConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_SKIP_GL_VERSIONS);
-        boolean showHelpLog = FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_LOG_HELP_MSG);
-        final String[] lastGLError = new String[GL_VERSIONS.length];
+        final String[] lastGLError=new String[GL_VERSIONS.length];
         do {
             final var glVersionToTry = GL_VERSIONS[versidx][0] + "." + GL_VERSIONS[versidx][1];
             if (skipVersions.contains(glVersionToTry)) {
@@ -399,23 +398,11 @@ public class DisplayWindow implements ImmediateWindowProvider {
                 continue;
             }
             LOGGER.info("Trying GL version " + glVersionToTry);
-            if (showHelpLog && versidx == 0) {
-                LOGGER.info("""
-                If this message is the only thing at the bottom of your log before a crash, you probably have a driver issue.
-
-                Possible solutions:
-                A) Make sure Minecraft is set to prefer high performance graphics in the OS and/or driver control panel
-                B) Check for driver updates on the graphics brand's website
-                C) Try reinstalling your graphics drivers
-                D) If still not working after trying all of the above, ask for further help on the Forge forums or Discord
-
-                You can safely ignore this message if the game starts up successfully.""");
-            }
             glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, GL_VERSIONS[versidx][0]); // we try our versions one at a time
             glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, GL_VERSIONS[versidx][1]);
             glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
             glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
-            window = glfwCreateWindow(winWidth, winHeight, vanillaWindowTitle, 0L, 0L);
+            window = glfwCreateWindow(winWidth, winHeight, "Minecraft: Forge Loading...", 0L, 0L);
             var erridx = versidx;
             handleLastGLFWError((error, description) -> lastGLError[erridx] = String.format("Trying %d.%d: GLFW error: [0x%X]%s", GL_VERSIONS[erridx][0], GL_VERSIONS[erridx][1], error, description));
             if (lastGLError[versidx] != null) {
@@ -443,9 +430,6 @@ public class DisplayWindow implements ImmediateWindowProvider {
         this.glVersion = gotVersion;
         this.window = window;
 
-        if (showHelpLog)
-            FMLConfig.updateConfig(FMLConfig.ConfigValue.EARLY_WINDOW_LOG_HELP_MSG, false);
-
         int[] x = new int[1];
         int[] y = new int[1];
         glfwGetMonitorPos(primaryMonitor, x, y);
@@ -463,19 +447,19 @@ public class DisplayWindow implements ImmediateWindowProvider {
         glfwSetWindowPos(window, (vidmode.width() - this.winWidth) / 2 + monitorX, (vidmode.height() - this.winHeight) / 2 + monitorY);
 
         // Attempt setting the icon
-//        int[] channels = new int[1];
-//        try (var glfwImgBuffer = GLFWImage.create(MemoryUtil.getAllocator().malloc(GLFWImage.SIZEOF), 1)) {
-//            final ByteBuffer imgBuffer;
-//            try (GLFWImage glfwImages = GLFWImage.malloc()) {
-//                imgBuffer = STBHelper.loadImageFromClasspath("forge_logo.png", 20000, x, y, channels);
-//                glfwImgBuffer.put(glfwImages.set(x[0], y[0], imgBuffer));
-//                glfwSetWindowIcon(window, glfwImgBuffer);
-//                STBImage.stbi_image_free(imgBuffer);
-//            }
-//        } catch (NullPointerException e) {
-//            System.err.println("Failed to load forge logo");
-//        }
-//        handleLastGLFWError((error, description) -> LOGGER.debug(String.format("Suppressing GLFW icon error: [0x%X]%s", error, description)));
+        int[] channels = new int[1];
+        try (var glfwImgBuffer = GLFWImage.create(MemoryUtil.getAllocator().malloc(GLFWImage.SIZEOF), 1)) {
+            final ByteBuffer imgBuffer;
+            try (GLFWImage glfwImages = GLFWImage.malloc()) {
+                imgBuffer = STBHelper.loadImageFromClasspath("forge_logo.png", 20000, x, y, channels);
+                glfwImgBuffer.put(glfwImages.set(x[0], y[0], imgBuffer));
+                glfwSetWindowIcon(window, glfwImgBuffer);
+                STBImage.stbi_image_free(imgBuffer);
+            }
+        } catch (NullPointerException e) {
+            System.err.println("Failed to load forge logo");
+        }
+        handleLastGLFWError((error, description) -> LOGGER.debug(String.format("Suppressing GLFW icon error: [0x%X]%s", error, description)));
 
         glfwSetFramebufferSizeCallback(window, this::fbResize);
         glfwSetWindowPosCallback(window, this::winMove);
@@ -492,6 +476,10 @@ public class DisplayWindow implements ImmediateWindowProvider {
         glfwPollEvents();
     }
 
+    private void badWindowHandler(final int code, final long desc) {
+        LOGGER.error("Got error from GLFW window init: "+code+ " "+MemoryUtil.memUTF8(desc));
+    }
+
     private void winResize(long window, int width, int height) {
         if (window == this.window && width != 0 && height != 0) {
             this.winWidth = width;
@@ -511,7 +499,7 @@ public class DisplayWindow implements ImmediateWindowProvider {
             this.winY = y;
         }
     }
-    private static void handleLastGLFWError(BiConsumer<Integer, String> handler) {
+    private void handleLastGLFWError(BiConsumer<Integer, String> handler) {
         try (MemoryStack memorystack = MemoryStack.stackPush()) {
             PointerBuffer pointerbuffer = memorystack.mallocPointer(1);
             int error = glfwGetError(pointerbuffer);
@@ -530,16 +518,6 @@ public class DisplayWindow implements ImmediateWindowProvider {
      * @return the Window we own.
      */
     public long setupMinecraftWindow(final IntSupplier width, final IntSupplier height, final Supplier<String> title, final LongSupplier monitorSupplier) {
-        // wait for the window to actually be initialized
-        try {
-            this.initializationFuture.get(30, TimeUnit.SECONDS);
-        } catch (InterruptedException | ExecutionException e) {
-            throw new RuntimeException(e);
-        } catch (TimeoutException e) {
-            Thread.dumpStack();
-            crashElegantly("We seem to be having trouble initializing the window, waited for 30 seconds");
-        }
-
         // we have to spin wait for the window ticker
         ImmediateWindowHandler.updateProgress("Initializing Game Graphics");
         while (!this.windowTick.isDone()) {
@@ -603,25 +581,11 @@ public class DisplayWindow implements ImmediateWindowProvider {
 
     @Override
     public void updateModuleReads(final ModuleLayer layer) {
-        final var FORGE_MODULE = "net.minecraftforge.forge";
-        var forge_module = layer.findModule(FORGE_MODULE).orElse(null);
-        if (forge_module == null)
-            throw new IllegalStateException("Could not find " + FORGE_MODULE + " in " + layer);
-
-        getClass().getModule().addReads(forge_module);
-
-
-        var clz = Class.forName(forge_module, "net.minecraftforge.client.loading.ForgeLoadingOverlay");
-
-        for (var mtd : clz.getDeclaredMethods()) {
-            if (Modifier.isStatic(mtd.getModifiers()) && "newInstance".equals(mtd.getName())) {
-                this.loadingOverlay = mtd;
-                break;
-            }
-        }
-
-        if (loadingOverlay == null)
-            throw new IllegalStateException("Could not find static newInstace method in " + clz.getName());
+        var fm = layer.findModule("forge").orElseThrow();
+        getClass().getModule().addReads(fm);
+        var clz = FMLLoader.getGameLayer().findModule("forge").map(l->Class.forName(l, "net.minecraftforge.client.loading.ForgeLoadingOverlay")).orElseThrow();
+        var methods = Arrays.stream(clz.getMethods()).filter(m-> Modifier.isStatic(m.getModifiers())).collect(Collectors.toMap(Method::getName, Function.identity()));
+        loadingOverlay = methods.get("newInstance");
     }
 
     public int getFramebufferTextureId() {
@@ -639,7 +603,8 @@ public class DisplayWindow implements ImmediateWindowProvider {
     }
 
     public void addMojangTexture(final int textureId) {
-        this.elements.addFirst(RenderElement.mojang(textureId, framecount));
+        this.elements.add(0, RenderElement.mojang(textureId, framecount));
+//        this.elements.get(0).retire(framecount + 1);
     }
 
     public void close() {

fmlearlydisplay/src/main/java/net/minecraftforge/fml/earlydisplay/PerformanceInfo.java

@@ -6,44 +6,35 @@
 package net.minecraftforge.fml.earlydisplay;
 
 import com.sun.management.OperatingSystemMXBean;
-import net.minecraftforge.fml.loading.FMLConfig;
 
 import java.lang.management.ManagementFactory;
 import java.lang.management.MemoryMXBean;
 import java.lang.management.MemoryUsage;
 
 public class PerformanceInfo {
-    private static final MemoryMXBean MEMORY_BEAN = ManagementFactory.getMemoryMXBean();
 
-    private final boolean showCPUUsage;
     private final OperatingSystemMXBean osBean;
-
-    private float memory;
+    private final MemoryMXBean memoryBean;
+    float memory;
     private String text;
 
     PerformanceInfo() {
-        showCPUUsage = FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_SHOW_CPU);
-        osBean = showCPUUsage ? ManagementFactory.getPlatformMXBean(OperatingSystemMXBean.class) : null;
+        osBean = ManagementFactory.getPlatformMXBean(OperatingSystemMXBean.class);
+        memoryBean = ManagementFactory.getMemoryMXBean();
     }
 
     void update() {
-        final MemoryUsage heapusage = MEMORY_BEAN.getHeapMemoryUsage();
+        final MemoryUsage heapusage = memoryBean.getHeapMemoryUsage();
         memory = (float) heapusage.getUsed() / heapusage.getMax();
-
-        if (!showCPUUsage) {
-            text = "Memory: %d/%dMB (%.1f%%)".formatted(heapusage.getUsed() >>> 20, heapusage.getMax() >>> 20, memory * 100f);
-            return;
-        }
-
         var cpuLoad = osBean.getProcessCpuLoad();
         String cpuText;
         if (cpuLoad == -1) {
-            cpuText = "*CPU: %.1f%%".formatted(osBean.getCpuLoad() * 100f);
+            cpuText = String.format("*CPU: %.1f%%", osBean.getCpuLoad() * 100f);
         } else {
-            cpuText = "CPU: %.1f%%".formatted(cpuLoad * 100f);
+            cpuText = String.format("CPU: %.1f%%", cpuLoad * 100f);
         }
 
-        text = "Memory: %d/%dMB (%.1f%%)  %s".formatted(heapusage.getUsed() >>> 20, heapusage.getMax() >>> 20, memory * 100f, cpuText);
+        text = String.format("Heap: %d/%d MB (%.1f%%) OffHeap: %d MB  %s", heapusage.getUsed() >> 20, heapusage.getMax() >> 20, memory * 100.0, memoryBean.getNonHeapMemoryUsage().getUsed() >> 20, cpuText);
     }
 
     String text() {

fmlearlydisplay/src/main/java/net/minecraftforge/fml/earlydisplay/RenderElement.java

@@ -22,8 +22,8 @@ public class RenderElement {
     static int globalAlpha = 255;
     private int retireCount;
 
-    @FunctionalInterface
     interface Renderer {
+
         void accept(SimpleBufferBuilder bb, DisplayContext context, int frame);
 
         default Renderer then(Renderer r) {
@@ -34,17 +34,11 @@ public class RenderElement {
             };
         }
     }
-    @FunctionalInterface
     interface TextureRenderer {
         void accept(SimpleBufferBuilder bb, DisplayContext context, int[] size, int frame);
     }
-
-    /** @deprecated Use {@link Renderer} directly. This was always eagerly resolved, making it an unnecessary wrapper. */
-    @Deprecated(since = "1.21.5", forRemoval = true)
-    @FunctionalInterface
     interface Initializer extends Supplier<Renderer> {}
 
-    @FunctionalInterface
     interface TextGenerator {
         void accept(SimpleBufferBuilder bb, SimpleFont fh, DisplayContext ctx);
     }
@@ -59,18 +53,11 @@ public class RenderElement {
         }
     }
 
-    /** @deprecated Use {@link RenderElement#RenderElement(Renderer)} instead */
-    @Deprecated(since = "1.21.5", forRemoval = true)
     public RenderElement(final Initializer rendererInitializer) {
         this.bb = new SimpleBufferBuilder(1);
         this.renderer = rendererInitializer.get();
     }
 
-    public RenderElement(Renderer renderer) {
-        this.bb = new SimpleBufferBuilder(1);
-        this.renderer = renderer;
-    }
-
     public boolean render(DisplayContext ctx, int count) {
         this.renderer.accept(bb, ctx, count);
         return this.retireCount == 0 || this.retireCount < count;
@@ -85,7 +72,7 @@ public class RenderElement {
         List<SimpleFont.DisplayText> texts = new ArrayList<>();
         for (int i = messages.size() - 1; i >= 0; i--) {
             final StartupNotificationManager.AgeMessage pair = messages.get(i);
-            final float fade = Math.clamp((4000.0f - (float) pair.age() - ( i - 4 ) * 1000.0f) / 5000.0f, 0.0f, 1.0f);
+            final float fade = clamp((4000.0f - (float) pair.age() - ( i - 4 ) * 1000.0f) / 5000.0f, 0.0f, 1.0f);
             if (fade <0.01f) continue;
             Message msg = pair.message();
             int colour = Math.min((int)(fade * 255f), globalAlpha) << 24 | 0xFFFFFF;
@@ -94,9 +81,19 @@ public class RenderElement {
 
         font.generateVerticesForTexts(10, context.scaledHeight() -  texts.size() * font.lineSpacing() + font.descent() - 10, bb, texts.toArray(SimpleFont.DisplayText[]::new));
     }
+    public static RenderElement monag() {
+        return new RenderElement(RenderElement.initializeTexture("monagstudios.png", 45000, 4, (bb, ctx, sz, frame) -> {
+            var size = 256;
+            var x0 = (ctx.width() - 2 * size) / 2;
+            var y0 = 64;
+            QuadHelper.loadQuad(bb, x0, x0+size, y0, y0+size/2f, 0f, 1f, 0f, 0.5f, 0xFFFFFFFF);
+            QuadHelper.loadQuad(bb, x0+size, x0+2*size, y0, y0+size/2f, 0f, 1f, 0.5f, 1f, 0xFFFFFFFF);
+        }));
+
+    }
 
     public static RenderElement mojang(final int textureId, final int frameStart) {
-        return new RenderElement((bb, ctx, frame) -> {
+        return new RenderElement(()->(bb, ctx, frame) -> {
             var size = 256 * ctx.scale();
             var x0 = (ctx.scaledWidth() - 2 * size) / 2;
             var y0 = 64 * ctx.scale() + 32;
@@ -148,11 +145,11 @@ public class RenderElement {
         }));
     }
     public static RenderElement progressBars(SimpleFont font) {
-        return new RenderElement((bb, ctx, frame) -> RenderElement.startupProgressBars(font, bb, ctx, frame));
+        return new RenderElement(() -> (bb, ctx, frame) -> RenderElement.startupProgressBars(font, bb, ctx, frame));
     }
 
     public static RenderElement performanceBar(SimpleFont font) {
-        return new RenderElement((bb, ctx, frame) -> RenderElement.memoryInfo(font, bb, ctx, frame));
+        return new RenderElement(() -> (bb, ctx, frame) -> RenderElement.memoryInfo(font, bb, ctx, frame));
     }
 
     public static void startupProgressBars(SimpleFont font, final SimpleBufferBuilder buffer, final DisplayContext context, final int frameNumber) {
@@ -187,10 +184,10 @@ public class RenderElement {
     }
     private static float[] indeterminateBar(int frame, boolean isActive) {
         if (RenderElement.globalAlpha != 0xFF || !isActive) {
-            return new float[] { 0f, 1f };
+            return new float[] {0f,1f};
         } else {
-            int progress = frame % 100;
-            return new float[] { Math.clamp((progress - 2) / 100f, 0f, 1f), Math.clamp((progress + 2) / 100f, 0f, 1f) };
+            var progress = frame % 100;
+            return new float[]{clamp((progress - 2) / 100f, 0f, 1f), clamp((progress + 2) / 100f, 0f, 1f)};
         }
     }
 
@@ -204,17 +201,14 @@ public class RenderElement {
         bar.then(label).accept(buffer, context, frameNumber);
     }
 
-    @FunctionalInterface
     interface ColourFunction {
         int colour(int frame);
     }
 
-    @FunctionalInterface
     interface ProgressDisplay {
         float[] progress(int frame);
     }
 
-    @FunctionalInterface
     interface BarPosition {
         int[] location(DisplayContext context);
     }
@@ -249,8 +243,8 @@ public class RenderElement {
         };
     }
 
-    private static Renderer initializeText(SimpleFont font, TextGenerator textGenerator) {
-        return (bb, context, frame) -> renderText(font, textGenerator, bb, context);
+    private static Initializer initializeText(SimpleFont font, TextGenerator textGenerator) {
+        return () -> (bb, context, frame) -> renderText(font, textGenerator, bb, context);
     }
 
     private static void renderText(final SimpleFont font, final TextGenerator textGenerator, final SimpleBufferBuilder bb, final DisplayContext context) {
@@ -264,13 +258,14 @@ public class RenderElement {
     private static TextGenerator text(int x, int y, String text, int colour) {
         return (bb, font, context) -> font.generateVerticesForTexts(x, y, bb, new SimpleFont.DisplayText(text, colour));
     }
-
-    private static Renderer initializeTexture(final String textureFileName, int size, int textureNumber, TextureRenderer positionAndColour) {
-        int[] imgSize = STBHelper.loadTextureFromClasspath(textureFileName, size, GL_TEXTURE0 + textureNumber + INDEX_TEXTURE_OFFSET);
-        return (bb, ctx, frame) -> {
-            ctx.elementShader().updateTextureUniform(textureNumber + INDEX_TEXTURE_OFFSET);
-            ctx.elementShader().updateRenderTypeUniform(ElementShader.RenderType.TEXTURE);
-            renderTexture(bb, ctx, frame, imgSize, positionAndColour);
+    private static Initializer initializeTexture(final String textureFileName, int size, int textureNumber, TextureRenderer positionAndColour) {
+        return ()->{
+            int[] imgSize = STBHelper.loadTextureFromClasspath(textureFileName, size, GL_TEXTURE0 + textureNumber + INDEX_TEXTURE_OFFSET);
+            return (bb, ctx, frame) -> {
+                ctx.elementShader().updateTextureUniform(textureNumber + INDEX_TEXTURE_OFFSET);
+                ctx.elementShader().updateRenderTypeUniform(ElementShader.RenderType.TEXTURE);
+                renderTexture(bb, ctx, frame, imgSize, positionAndColour);
+            };
         };
     }
 
@@ -280,13 +275,21 @@ public class RenderElement {
         bb.draw();
     }
 
-    @Deprecated(since = "1.21.5", forRemoval = true)
+
     public static float clamp(float num, float min, float max) {
-        return Math.clamp(num, min, max);
+        if (num < min) {
+            return min;
+        } else {
+            return num > max ? max : num;
+        }
     }
 
     public static int clamp(int num, int min, int max) {
-        return Math.min(max, Math.max(num, min));
+        if (num < min) {
+            return min;
+        } else {
+            return num > max ? max : num;
+        }
     }
 
     public static int hsvToRGB(float hue, float saturation, float value) {

fmlearlydisplay/src/main/java/net/minecraftforge/fml/earlydisplay/SimpleFont.java

@@ -11,6 +11,8 @@ import org.lwjgl.stb.STBTTFontinfo;
 import org.lwjgl.stb.STBTTPackContext;
 import org.lwjgl.stb.STBTTPackRange;
 import org.lwjgl.stb.STBTTPackedchar;
+import org.lwjgl.system.MemoryStack;
+
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
 
@@ -22,8 +24,8 @@ public class SimpleFont {
     private final int textureNumber;
     private final int lineSpacing;
     private final int descent;
-    private static final int GLYPH_COUNT = 127 - 32;
-    private final Glyph[] glyphs;
+    private final int GLYPH_COUNT = 127-32;
+    private Glyph[] glyphs;
 
     private record Glyph(char c, int charwidth, int[] pos, float[] uv) {
         Pos loadQuad(Pos pos, int colour, SimpleBufferBuilder bb) {
@@ -120,7 +122,7 @@ public class SimpleFont {
                 case '\n', '\t' -> 0;
                 case ' ' -> glyphs[0].charwidth();
                 default -> {
-                    if (c - 32 < GLYPH_COUNT && c > 32) {
+                    if (c - 32 < this.GLYPH_COUNT && c > 32) {
                         yield this.glyphs[c - 32].charwidth();
                     } else {
                         yield 0;
@@ -151,7 +153,7 @@ public class SimpleFont {
                     case '\t' -> new Pos(pos.x()+font.glyphs[0].charwidth() * 4, pos.y(), pos.minx());
                     case ' ' -> new Pos(pos.x()+font.glyphs[0].charwidth(), pos.y(), pos.minx());
                     default -> {
-                        if (c-32 < GLYPH_COUNT && c > 32) {
+                        if (c-32 < font.GLYPH_COUNT && c > 32) {
                             pos = font.glyphs[c - 32].loadQuad(pos, colour(), bb);
                         }
                         yield pos;

fmlloader/build.gradle

@@ -1,189 +1,97 @@
-import groovy.transform.CompileDynamic
-import groovy.transform.CompileStatic
-import groovy.transform.PackageScope
-import net.minecraftforge.forgedev.legacy.tasks.JarJarMetadataOptions
-import org.gradle.api.plugins.jvm.JvmTestSuite
-
-import javax.inject.Inject
-
 plugins {
-    id 'java-library'
-    id 'jvm-test-suite'
-    id 'maven-publish'
-    alias libs.plugins.licenser
-    alias libs.plugins.gradleutils
-    alias libs.plugins.gitversion
-    alias libs.plugins.changelog
-    alias libs.plugins.apt
-    id 'net.minecraftforge.forge.build.convention'
+    id 'com.github.ben-manes.versions'
+    id 'org.javamodularity.moduleplugin' version '1.8.3' apply false
+    id 'org.cadixdev.licenser'
+}
+apply plugin: 'java-library'
+apply plugin: 'jacoco'
+apply plugin: 'org.javamodularity.moduleplugin'
+
+dependencyUpdates.rejectVersionIf { isNonStable(it.candidate.version) }
+configurations.forEach{ it.transitive = false }
+
+dependencies {
+    compileOnly("org.jetbrains:annotations:${JETBRAINS_ANNOTATIONS_VERSION}")
+
+    api("org.ow2.asm:asm:${ASM_VERSION}")
+    api("org.ow2.asm:asm-tree:${ASM_VERSION}")
+    api("org.ow2.asm:asm-commons:${ASM_VERSION}")
+    api("net.minecraftforge:forgespi:${SPI_VERSION}")
+    api("net.minecraftforge:mergetool:${MERGETOOL_VERSION}:api")
+    api("org.apache.logging.log4j:log4j-api:${LOG4J_VERSION}")
+    api("org.slf4j:slf4j-api:${SLF4J_API_VERSION}")
+    api("com.google.guava:guava:${GUAVA_VERSION}")
+    api("com.google.code.gson:gson:${GSON_VERSION}")
+    api("org.apache.maven:maven-artifact:${APACHE_MAVEN_ARTIFACT_VERSION}")
+    api("org.apache.commons:commons-lang3:${APACHE_COMMONS_LANG3_VERSION}")
+    api("com.electronwill.night-config:core:${NIGHTCONFIG_VERSION}")
+    api("com.electronwill.night-config:toml:${NIGHTCONFIG_VERSION}")
+    api("cpw.mods:modlauncher:${MODLAUNCHER_VERSION}")
+    api("net.minecraftforge:coremods:${COREMODS_VERSION}")
+    api("com.mojang:logging:${MOJANG_LOGGING_VERSION}")
+    api "net.minecraftforge:JarJarSelector:${JARJAR_VERSION}"
+    api "net.minecraftforge:JarJarMetadata:${JARJAR_VERSION}"
+
+    implementation("net.sf.jopt-simple:jopt-simple:${JOPT_SIMPLE_VERSION}")
+    implementation("cpw.mods:securejarhandler:${SECUREJARHANDLER_VERSION}")
+    implementation("net.minecraftforge:accesstransformers:${ACCESSTRANSFORMERS_VERSION}")
+    implementation("net.minecrell:terminalconsoleappender:${TERMINALCONSOLEAPPENDER_VERSION}")
+    // implementation("org.jline:jline:${JLINE_VERSION}")
+
+    implementation("org.apache.logging.log4j:log4j-core:${LOG4J_VERSION}")
+    annotationProcessor("org.apache.logging.log4j:log4j-core:${LOG4J_VERSION}")
+
+    testCompileOnly("org.jetbrains:annotations:${JETBRAINS_ANNOTATIONS_VERSION}")
+    testRuntimeOnly("cpw.mods:bootstraplauncher:${BOOTSTRAPLAUNCHER_VERSION}")
 }
 
-gradleutils.displayName = 'FMLLoader'
-final vendor = 'Forge Development LLC'
-description = 'Modifications to Minecraft to enable mod developers.'
+task sourcesJar(type: Jar) {
+    archiveClassifier = 'sources'
+    from sourceSets.main.allSource
+}
 
-java {
-    toolchain.languageVersion = JavaLanguageVersion.of(javaVersion)
-    withSourcesJar()
+ext {
+    MANIFESTS = [
+        '/': [
+            'Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
+            'Git-Commit': GIT_INFO.abbreviatedId,
+            'Git-Branch': GIT_INFO.branch,
+            'Build-Number': "${System.getenv('BUILD_NUMBER')?:0}",
+        ] as LinkedHashMap,
+        'net/minecraftforge/fml/loading/': [
+            'Specification-Title':      'FMLLoader',
+            'Specification-Vendor':     'Forge Development LLC',
+            'Specification-Version':    '1',
+            'Implementation-Title':     'FML Loader',
+            'Implementation-Version':   '1.0',
+            'Implementation-Vendor':    'Forge'
+        ] as LinkedHashMap
+    ]
+}
+
+jar.doFirst {
+    manifest.attributes['Automatic-Module-Name'] = project.name
+    MANIFESTS.each { pkg, values ->
+        manifest.attributes(values, pkg)
+    }
+}
+
+tasks.withType(JavaCompile) {
+    options.compilerArgs << '-Xlint:unchecked'
 }
 
 license {
     header = rootProject.file('LICENSE-header.txt')
+
+    include 'net/minecraftforge/'
 }
 
-changelog {
-    from changelogBase
+artifacts {
+    archives jar
+    archives sourcesJar
 }
 
-dependencies {
-    compileOnly libs.jetbrains.annotations
-
-    // TODO [FMLLoader] Figure out a better way to lock transitive dependencies to the explicit versions shipped by the isntaller
-    api(libs.bundles.asm         ){ transitive = false } // Needed by all the black magic
-    api(libs.forgespi            ){ transitive = false }
-    api(libs.mergetool.api       ){ transitive = false }
-    api(libs.log4j.api           ){ transitive = false }
-    api(libs.slf4j.api           ){ transitive = false }
-    api(libs.guava               ){ transitive = false }
-    api(libs.gson                ){ transitive = false }
-    api(libs.maven.artifact      ){ transitive = false }
-    api(libs.apache.commons      ){ transitive = false }
-    api(libs.bundles.night.config){ transitive = false }
-    api(libs.modlauncher         ){ transitive = false }
-    api(libs.mojang.logging      ){ transitive = false }
-    api(libs.jarjar.selector     ){ transitive = false }
-    api(libs.jarjar.meta         ){ transitive = false }
-
-    implementation(libs.jopt.simple            ){ transitive = false }
-    implementation(libs.securemodules          ){ transitive = false }
-    implementation(libs.accesstransformers     ){ transitive = false }
-    implementation(libs.terminalconsoleappender){ transitive = false }
-    implementation(libs.jimfs                  ){ transitive = false }
-
-    // Needed because we have a custom log4j plugin, and they removed package scanning and require a data file to be generated
-    implementation(libs.log4j.core        ){ transitive = false }
-    annotationProcessor(libs.bundles.log4j){ transitive = false }
-}
-
-testing.suites.named('test', JvmTestSuite) {
-    dependencies {
-        compileOnly libs.jetbrains.annotations
-        runtimeOnly libs.bootstrap
-    }
-}
-
-tasks.withType(JavaCompile).configureEach {
-    options.compilerArgs << '-Xlint:unchecked'
-}
-
-tasks.named('jar', Jar) {
-    manifest {
-        attributes([
-            'Automatic-Module-Name': 'net.minecraftforge.fmlloader',
-            'Forge-Module-Layer'   : 'boot'
-        ])
-        attributes([
-            'Specification-Title'   : gradleutils.displayName.get(),
-            'Specification-Vendor'  : vendor,
-            'Specification-Version' : '1',
-            'Implementation-Title'  : gradleutils.displayName.get(),
-            'Implementation-Vendor' : vendor,
-            'Implementation-Version': forgeVersion
-        ], 'net/minecraftforge/fml/loading/')
-    }
-}
-
-publishing {
-    repositories {
-        maven gradleutils.publishingForgeMaven
-    }
-
-    publications.register('mavenJava', MavenPublication) {
-        changelog.publish(it)
-        gradleutils.promote(it)
-
-        from components.java
-
-        pom {
-            description = project.description
-
-            gradleutils.pom.addRemoteDetails(pom)
-
-            licenses {
-                license gradleutils.pom.licenses.LGPLv2_1
-            }
-        }
-    }
-}
-
-// A simple task to write JSON to a file. Using Task#doLast to output files is no longer supported.
-// This code may seem verbose, but it's better this way.  If more projects need this, we can move it to buildSrc.
-@CompileStatic
-@PackageScope abstract class WriteForgeVersionJson extends DefaultTask {
-    abstract @Input Property<String> getForgeVersion()
-    abstract @Input Property<String> getMinecraftVersion()
-    abstract @Input Property<String> getMcpVersion()
-
-    abstract @OutputFile RegularFileProperty getOutputFile()
-
-    @Inject
-    WriteForgeVersionJson() {}
-
-    @TaskAction
-    @CompileDynamic
-    void exec() {
-        var json = new groovy.json.JsonBuilder()
-        json {
-            forge this.forgeVersion.get()
-            mc    this.minecraftVersion.get()
-            mcp   this.mcpVersion.get()
-        }
-        this.outputFile.asFile.get().text = json.toPrettyString()
-    }
-}
-
-tasks.register('writeForgeVersionJson', WriteForgeVersionJson) {
-    forgeVersion = project.forgeVersion
-    minecraftVersion = project.minecraftVersion
-    mcpVersion = project.mcpVersion
-
-    outputFile = file('src/main/resources/forge_version.json')
-}
-
-tasks.register('jarJarOptionsJson', JarJarMetadataOptions) {
-    metadataFile = project.file('src/main/resources/jarjar_options.json')
-    // This is resolved too early by cpw.mods.modlauncher.TransformationServicesHandler.discoverServices(DiscoveryData) But eventually...
-    //add(libs.mixin, 'org/spongepowered/asm/mixin/Mixin.class')
-    add(libs.mixinextras.forge) {
-        containedJarMetadata {
-            path = ''
-        }
-        resource = 'com/llamalad7/mixinextras/platform/forge/MixinExtrasConfigPlugin.class'
-        layer = 'GAMELIBRARY'
-        id = 'mixinextras'
-        nested = true
-    }
-}
-
-tasks.named('generateResources') {
-    dependsOn(
-        tasks.named('eclipseJdt'),
-        tasks.named('eclipseJdtApt'),
-        tasks.named('eclipseFactorypath'),
-        tasks.named('writeForgeVersionJson', WriteForgeVersionJson),
-        tasks.named('jarJarOptionsJson')
-    )
-}
-
-eclipse.classpath {
-    // We need to set the default output directory for the log4j annotation processor
-    // Ideally we'd just set the value, but the eclipse plugin deduplicates the output directories
-    // So we have to do a hacky whenMerged
-    //defaultOutputDir = file('bin/main')
-    file.whenMerged {
-        entries.each { entry ->
-            if (entry.kind == 'output' && entry.hasProperty('path'))
-                entry.path = 'bin/main'
-        }
-    }
-}
+publishing.publications.mavenJava(MavenPublication) {
+    from components.java
+    artifact sourcesJar
+}

fmlloader/src/main/java/net/minecraftforge/fml/common/asm/CapabilityTokenSubclass.java

@@ -34,10 +34,11 @@ import cpw.mods.modlauncher.serviceapi.ILaunchPluginService;
  *  }</code>
  * </pre>
  */
-public final class CapabilityTokenSubclass implements ILaunchPluginService {
-    private static final String FUNC_NAME = "getType";
-    private static final String FUNC_DESC = "()Ljava/lang/String;";
-    private static final String CAP_INJECT = "net/minecraftforge/common/capabilities/CapabilityToken"; // Don't directly reference this to prevent class loading.
+public class CapabilityTokenSubclass implements ILaunchPluginService {
+
+    private final String FUNC_NAME = "getType";
+    private final String FUNC_DESC = "()Ljava/lang/String;";
+    private final String CAP_INJECT = "net/minecraftforge/common/capabilities/CapabilityToken"; //Don't directly reference this to prevent class loading.
 
     @Override
     public String name() {
@@ -48,48 +49,49 @@ public final class CapabilityTokenSubclass implements ILaunchPluginService {
     private static final EnumSet<Phase> NAY = EnumSet.noneOf(Phase.class);
 
     @Override
-    public EnumSet<Phase> handlesClass(Type classType, boolean isEmpty) {
-        if (isEmpty)
-            return NAY;
-
-        String internalName = classType.getInternalName();
-        if (internalName.startsWith("net/minecraft/") || internalName.startsWith("com/mojang/"))
-            return NAY;
-
-        if (internalName.startsWith("net/minecraftforge/common/capabilities/"))
-            return YAY;
-        
-        return internalName.contains("$") ? YAY : NAY; // Anonymous subclasses only
+    public EnumSet<Phase> handlesClass(Type classType, boolean isEmpty)
+    {
+        return isEmpty ? NAY : YAY;
     }
 
     @Override
-    public int processClassWithFlags(final Phase phase, final ClassNode classNode, final Type classType, final String reason) {
-        if (CAP_INJECT.equals(classNode.name)) {
-            for (MethodNode mtd : classNode.methods) {
-                if (FUNC_NAME.equals(mtd.name) && FUNC_DESC.equals(mtd.desc)) {
+    public int processClassWithFlags(final Phase phase, final ClassNode classNode, final Type classType, final String reason)
+    {
+        if (CAP_INJECT.equals(classNode.name))
+        {
+            for (MethodNode mtd : classNode.methods)
+            {
+                if (FUNC_NAME.equals(mtd.name) && FUNC_DESC.equals(mtd.desc))
+                {
                     mtd.access &= ~Opcodes.ACC_FINAL; // We have it final in code so people don't override it, cuz that'd be stupid, and make our transformer more complicated.
                 }
             }
             return ComputeFlags.SIMPLE_REWRITE;
-        } else if (CAP_INJECT.equals(classNode.superName)) {
-            var cls = new Object() { String value = null; };
+        }
+        else if (CAP_INJECT.equals(classNode.superName))
+        {
+            Holder cls = new Holder();
 
             SignatureReader reader = new SignatureReader(classNode.signature); // Having a node version of this would probably be useful.
-            reader.accept(new SignatureVisitor(Opcodes.ASM9) {
-                final Deque<String> stack = new ArrayDeque<>();
+            reader.accept(new SignatureVisitor(Opcodes.ASM9)
+            {
+                Deque<String> stack = new ArrayDeque<>();
 
                 @Override
-                public void visitClassType(final String name) {
+                public void visitClassType(final String name)
+                {
                     stack.push(name);
                 }
 
                 @Override
-                public void visitInnerClassType(final String name) {
+                public void visitInnerClassType(final String name)
+                {
                     stack.push(stack.pop() + '$' + name);
                 }
 
                 @Override
-                public void visitEnd() {
+                public void visitEnd()
+                {
                     var val = stack.pop();
                     if (!stack.isEmpty() && CAP_INJECT.equals(stack.peek()))
                         cls.value = val;
@@ -104,8 +106,15 @@ public final class CapabilityTokenSubclass implements ILaunchPluginService {
             mtd.visitInsn(Opcodes.ARETURN);
             mtd.visitEnd();
             return ComputeFlags.COMPUTE_MAXS;
-        } else {
+        }
+        else
+        {
             return ComputeFlags.NO_REWRITE;
         }
     }
+
+    private static class Holder {
+        String value;
+    }
+
 }

fmlloader/src/main/java/net/minecraftforge/fml/common/asm/ObjectHolderDefinalize.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) Forge Development LLC and contributors
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.fml.common.asm;
+
+import java.util.EnumSet;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.Type;
+import org.objectweb.asm.tree.AnnotationNode;
+import org.objectweb.asm.tree.ClassNode;
+import cpw.mods.modlauncher.serviceapi.ILaunchPluginService;
+
+/**
+ * Removes the final modifier from fields with the @ObjectHolder annotation, prevents the JITer from in lining them so our runtime replacements can work.
+ * Will also de-finalize all fields in on class level annotations.
+ */
+public class ObjectHolderDefinalize implements ILaunchPluginService {
+    // Hardcoded map of vanilla classes that should have object holders for each field of the given registry type.
+    // IMPORTANT: Updates to this collection must be reflected in ObjectHolderRegistry. Duplicated cuz classloaders, yay!
+    // Classnames are validated in ObjectHolderRegistry.
+    private static final Map<String, VanillaObjectHolderData> VANILLA_OBJECT_HOLDERS = Stream.of(
+            new VanillaObjectHolderData("net.minecraft.world.level.block.Blocks", "block", "net.minecraft.world.level.block.Block"),
+            new VanillaObjectHolderData("net.minecraft.world.item.Items", "item", "net.minecraft.world.item.Item"),
+            new VanillaObjectHolderData("net.minecraft.world.item.enchantment.Enchantments", "enchantment", "net.minecraft.world.item.enchantment.Enchantment"),
+            new VanillaObjectHolderData("net.minecraft.world.effect.MobEffects", "mob_effect", "net.minecraft.world.effect.MobEffect"),
+            new VanillaObjectHolderData("net.minecraft.core.particles.ParticleTypes", "particle_type", "net.minecraft.core.particles.ParticleType"),
+            new VanillaObjectHolderData("net.minecraft.sounds.SoundEvents", "sound_event", "net.minecraft.sounds.SoundEvent")
+    ).collect(Collectors.toMap(VanillaObjectHolderData::holderClass, Function.identity()));
+    private final String OBJECT_HOLDER = "Lnet/minecraftforge/registries/ObjectHolder;"; //Don't directly reference this to prevent class loading.
+
+    @Override
+    public String name() {
+        return "object_holder_definalize";
+    }
+
+    private static final EnumSet<Phase> YAY = EnumSet.of(Phase.AFTER);
+    private static final EnumSet<Phase> NAY = EnumSet.noneOf(Phase.class);
+
+    @Override
+    public EnumSet<Phase> handlesClass(Type classType, boolean isEmpty)
+    {
+        return isEmpty ? NAY : YAY;
+    }
+
+    private boolean hasHolder(List<AnnotationNode> lst)
+    {
+        return lst != null && lst.stream().anyMatch(n -> n.desc.equals(OBJECT_HOLDER));
+    }
+
+    private String getValue(List<AnnotationNode> lst)
+    {
+        AnnotationNode ann = lst.stream().filter(n -> n.desc.equals(OBJECT_HOLDER)).findFirst().get();
+        if (ann.values != null)
+        {
+            for (int x = 0; x < ann.values.size() - 1; x += 2) {
+                if (ann.values.get(x).equals("value")) {
+                    return (String)ann.values.get(x + 1);
+                }
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public int processClassWithFlags(final Phase phase, final ClassNode classNode, final Type classType, final String reason)
+    {
+        final AtomicBoolean changes = new AtomicBoolean();
+        //Must be public static finals, and non-array objects
+        final int flags = Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC | Opcodes.ACC_FINAL;
+
+        //Fix Annotated Fields before injecting from class level
+        classNode.fields.stream().filter(f -> ((f.access & flags) == flags) && f.desc.startsWith("L") && hasHolder(f.visibleAnnotations)).forEach(f ->
+        {
+            int prev = f.access;
+            f.access &= ~Opcodes.ACC_FINAL; //Strip final
+            f.access |= Opcodes.ACC_SYNTHETIC; //Add Synthetic so we can check in runtime. ? Good idea?
+            changes.compareAndSet(false, prev != f.access);
+        });
+
+        if (VANILLA_OBJECT_HOLDERS.containsKey(classType.getClassName())) //Class level, de-finalize all fields and add @ObjectHolder to them!
+        {
+            classNode.fields.stream().filter(f -> ((f.access & flags) == flags) && f.desc.startsWith("L")).forEach(f ->
+            {
+                int prev = f.access;
+                f.access &= ~Opcodes.ACC_FINAL;
+                f.access |= Opcodes.ACC_SYNTHETIC;
+                /*if (!hasHolder(f.visibleAnnotations)) //Add field level annotation, doesn't do anything until after we figure out how ASMDataTable is gatherered
+                {
+                   if (value == null)
+                       f.visitAnnotation(OBJECT_HOLDER, true);
+                   else
+                       f.visitAnnotation(OBJECT_HOLDER, true).visit("value", value + ":" + f.name.toLowerCase());
+                }*/
+                changes.compareAndSet(false, prev != f.access);
+            });
+        }
+        return changes.get() ? ComputeFlags.SIMPLE_REWRITE : ComputeFlags.NO_REWRITE;
+    }
+
+    private record VanillaObjectHolderData(String holderClass, String registryName, String registryType) {}
+}

fmlloader/src/main/java/net/minecraftforge/fml/common/asm/RuntimeEnumExtender.java

@@ -7,9 +7,9 @@ package net.minecraftforge.fml.common.asm;
 
 import java.util.EnumSet;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import com.mojang.logging.LogUtils;
-import net.minecraftforge.fml.loading.LoadingModList;
 import org.objectweb.asm.Label;
 import org.objectweb.asm.Opcodes;
 import org.objectweb.asm.Type;
@@ -20,6 +20,8 @@ import org.objectweb.asm.tree.MethodNode;
 
 import cpw.mods.modlauncher.serviceapi.ILaunchPluginService;
 import org.slf4j.Logger;
+import org.slf4j.Marker;
+import org.slf4j.MarkerFactory;
 
 /**
  * Modifies specified enums to allow runtime extension by making the $VALUES field non-final and
@@ -28,16 +30,15 @@ import org.slf4j.Logger;
 public class RuntimeEnumExtender implements ILaunchPluginService {
 
     private static final Logger LOGGER = LogUtils.getLogger();
-    private static final Type STRING = Type.getType(String.class);
-    private static final Type ENUM = Type.getType(Enum.class);
-    private static final Type MARKER_IFACE = Type.getType("Lnet/minecraftforge/common/IExtensibleEnum;");
-    private static final Type ARRAY_UTILS = Type.getType("Lorg/apache/commons/lang3/ArrayUtils;"); //Don't directly reference this to prevent class loading.
-    private static final String ADD_DESC = Type.getMethodDescriptor(Type.getType(Object[].class), Type.getType(Object[].class), Type.getType(Object.class));
-    private static final Type UNSAFE_HACKS = Type.getType("Lnet/minecraftforge/fml/unsafe/UnsafeHacks;"); //Again, not direct reference to prevent class loading.
-    private static final String CLEAN_DESC = Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Class.class));
-    private static final String NAME_DESC = Type.getMethodDescriptor(STRING);
-    private static final String EQUALS_DESC = Type.getMethodDescriptor(Type.BOOLEAN_TYPE, STRING);
-    private static final int FLAGS = Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC;
+    private final Type STRING = Type.getType(String.class);
+    private final Type ENUM = Type.getType(Enum.class);
+    private final Type MARKER_IFACE = Type.getType("Lnet/minecraftforge/common/IExtensibleEnum;");
+    private final Type ARRAY_UTILS = Type.getType("Lorg/apache/commons/lang3/ArrayUtils;"); //Don't directly reference this to prevent class loading.
+    private final String ADD_DESC = Type.getMethodDescriptor(Type.getType(Object[].class), Type.getType(Object[].class), Type.getType(Object.class));
+    private final Type UNSAFE_HACKS = Type.getType("Lnet/minecraftforge/fml/unsafe/UnsafeHacks;"); //Again, not direct reference to prevent class loading.
+    private final String CLEAN_DESC = Type.getMethodDescriptor(Type.VOID_TYPE, Type.getType(Class.class));
+    private final String NAME_DESC = Type.getMethodDescriptor(STRING);
+    private final String EQUALS_DESC = Type.getMethodDescriptor(Type.BOOLEAN_TYPE, STRING);
 
     @Override
     public String name() {
@@ -47,21 +48,10 @@ public class RuntimeEnumExtender implements ILaunchPluginService {
     private static final EnumSet<Phase> YAY = EnumSet.of(Phase.AFTER);
     private static final EnumSet<Phase> NAY = EnumSet.noneOf(Phase.class);
 
-    private static final class LazyInit {
-        private LazyInit() {}
-        private static final boolean ANY_MODS = LoadingModList.get().getMods().size() > 2; // 2: forge, minecraft
-    }
-
     @Override
-    public EnumSet<Phase> handlesClass(Type classType, boolean isEmpty) {
-        if (isEmpty || !LazyInit.ANY_MODS)
-            return NAY;
-
-        String internalName = classType.getInternalName();
-        if (internalName.startsWith("net/minecraft/client/model") || internalName.startsWith("net/minecraft/world"))
-            return YAY;
-
-        return NAY;
+    public EnumSet<Phase> handlesClass(Type classType, boolean isEmpty)
+    {
+        return isEmpty ? NAY : YAY;
     }
 
     @Override
@@ -70,24 +60,25 @@ public class RuntimeEnumExtender implements ILaunchPluginService {
         if ((classNode.access & Opcodes.ACC_ENUM) == 0)
             return ComputeFlags.NO_REWRITE;
 
-        if (!classNode.interfaces.contains(MARKER_IFACE.getInternalName()))
-            return ComputeFlags.NO_REWRITE;
-
         Type array = Type.getType("[" + classType.getDescriptor());
-        String arrayDesc = array.getDescriptor();
+        final int flags = Opcodes.ACC_PRIVATE | Opcodes.ACC_STATIC | Opcodes.ACC_FINAL | Opcodes.ACC_SYNTHETIC;
 
-        FieldNode values = classNode.fields.stream().filter(f -> f.desc.equals(arrayDesc) && ((f.access & FLAGS) == FLAGS)).findFirst().orElse(null);
+        FieldNode values = classNode.fields.stream().filter(f -> f.desc.contentEquals(array.getDescriptor()) && ((f.access & flags) == flags)).findFirst().orElse(null);
+
+        if (!classNode.interfaces.contains(MARKER_IFACE.getInternalName())) {
+            return ComputeFlags.NO_REWRITE;
+        }
 
         //Static methods named "create" with first argument as a string
         List<MethodNode> candidates = classNode.methods.stream()
                 .filter(m -> ((m.access & Opcodes.ACC_STATIC) != 0) && m.name.equals("create"))
-                .toList();
+                .collect(Collectors.toList());
 
         if (candidates.isEmpty()) {
             throw new IllegalStateException("IExtensibleEnum has no candidate factory methods: " + classType.getClassName());
         }
 
-        for (var mtd : candidates)
+        candidates.forEach(mtd ->
         {
             Type[] args = Type.getArgumentTypes(mtd.desc);
             if (args.length == 0 || !args[0].equals(STRING)) {
@@ -119,7 +110,8 @@ public class RuntimeEnumExtender implements ILaunchPluginService {
             Type[] ctrArgs = new Type[args.length + 1];
             ctrArgs[0] = STRING;
             ctrArgs[1] = Type.INT_TYPE;
-            System.arraycopy(args, 1, ctrArgs, 2, args.length - 1);
+            for (int x = 1; x < args.length; x++)
+                ctrArgs[1 + x] = args[x];
 
             String desc = Type.getMethodDescriptor(Type.VOID_TYPE, ctrArgs);
 
@@ -241,7 +233,7 @@ public class RuntimeEnumExtender implements ILaunchPluginService {
                 ins.load(vars, classType);
                 ins.areturn(classType);
             }
-        }
+        });
         return ComputeFlags.COMPUTE_FRAMES;
     }
 

fmlloader/src/main/java/net/minecraftforge/fml/loading/BackgroundWaiter.java

@@ -5,14 +5,17 @@
 
 package net.minecraftforge.fml.loading;
 
+import net.minecraftforge.fml.loading.progress.StartupNotificationManager;
+
 import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 
 public class BackgroundWaiter {
+    private static ExecutorService runner = Executors.newSingleThreadExecutor();
 
     public static void runAndTick(Runnable r, Runnable tick) {
-        var runner = Executors.newSingleThreadExecutor();
         ImmediateWindowHandler.updateProgress("Loading bootstrap resources");
         final Future<?> work = runner.submit(r);
         do {

fmlloader/src/main/java/net/minecraftforge/fml/loading/ClasspathTransformerDiscoverer.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) Forge Development LLC and contributors
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.fml.loading;
+
+import cpw.mods.modlauncher.api.NamedPath;
+import cpw.mods.modlauncher.serviceapi.ITransformerDiscoveryService;
+import org.apache.logging.log4j.LogManager;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.*;
+
+public class ClasspathTransformerDiscoverer implements ITransformerDiscoveryService {
+
+    private final List<Path> legacyClasspath = Arrays.stream(System.getProperty("legacyClassPath", "").split(File.pathSeparator)).map(Path::of).toList();
+
+    @Override
+    public List<NamedPath> candidates(Path gameDirectory) {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public List<NamedPath> candidates(final Path gameDirectory, final String launchTarget) {
+        if (launchTarget != null && launchTarget.contains("dev")) {
+            this.scan(gameDirectory);
+        }
+        return List.copyOf(found);
+    }
+
+    private final static List<NamedPath> found = new ArrayList<>();
+
+    public static List<Path> allExcluded() {
+        return found.stream().map(np->np.paths()[0]).toList();
+    }
+    
+    private void scan(final Path gameDirectory) {
+        try {
+            locateTransformers("META-INF/services/cpw.mods.modlauncher.api.ITransformationService");
+            locateTransformers("META-INF/services/net.minecraftforge.forgespi.locating.IModLocator");
+        } catch (IOException e) {
+            LogManager.getLogger().error("Error during discovery of transform services from the classpath", e);
+        }
+    }
+
+    private void locateTransformers(String resource) throws IOException {
+        final Enumeration<URL> resources = ClassLoader.getSystemClassLoader().getResources(resource);
+        while (resources.hasMoreElements()) {
+            URL url = resources.nextElement();
+            Path path = ClasspathLocatorUtils.findJarPathFor(resource, url.toString(), url);
+            if (legacyClasspath.stream().anyMatch(path::equals) || !Files.exists(path) || Files.isDirectory(path))
+                continue;
+            found.add(new NamedPath(path.toUri().toString(), path));
+        }
+    }
+}

fmlloader/src/main/java/net/minecraftforge/fml/loading/EarlyLoadingException.java

@@ -14,8 +14,6 @@ import java.util.List;
  * or server.
  */
 public class EarlyLoadingException extends RuntimeException {
-    private static final long serialVersionUID = 2302192216172508006L;
-
     public static class ExceptionData {
         private final IModInfo modInfo;
         private final String i18message;

fmlloader/src/main/java/net/minecraftforge/fml/loading/FMLConfig.java

@@ -36,14 +36,13 @@ public class FMLConfig
         EARLY_WINDOW_FBSCALE("earlyWindowFBScale", 1, "Early window framebuffer scale"),
         EARLY_WINDOW_MAXIMIZED("earlyWindowMaximized", Boolean.FALSE, "Early window starts maximized"),
         EARLY_WINDOW_SKIP_GL_VERSIONS("earlyWindowSkipGLVersions", List.of(), "Skip specific GL versions, may help with buggy graphics card drivers"),
-        EARLY_WINDOW_SQUIR("earlyWindowSquir", Boolean.FALSE, "Squir?"),
-        EARLY_WINDOW_SHOW_CPU("earlyWindowShowCPU", Boolean.FALSE, "Whether to show CPU usage stats in early window"),
-        EARLY_WINDOW_LOG_HELP_MSG("earlyWindowLogHelpMessage", Boolean.TRUE, "Whether to log a help message on first attempt, to aid troubleshooting. This setting should automatically disable itself after a successful launch"),
+        EARLY_WINDOW_SQUIR("earlyWindowSquir", Boolean.FALSE, "Squir?")
         ;
 
         private final String entry;
         private final Object defaultValue;
         private final String comment;
+        private final Class<?> valueType;
         private final Function<Object, Object> entryFunction;
 
         ConfigValue(final String entry, final Object defaultValue, final String comment) {
@@ -53,6 +52,7 @@ public class FMLConfig
             this.entry = entry;
             this.defaultValue = defaultValue;
             this.comment = comment;
+            this.valueType = defaultValue.getClass();
             this.entryFunction = entryFunction;
         }
 

fmlloader/src/main/java/net/minecraftforge/fml/loading/FMLLoader.java

@@ -8,38 +8,44 @@ package net.minecraftforge.fml.loading;
 import com.mojang.logging.LogUtils;
 import cpw.mods.modlauncher.Launcher;
 import cpw.mods.modlauncher.api.*;
+import cpw.mods.modlauncher.serviceapi.ILaunchPluginService;
+import cpw.mods.modlauncher.util.ServiceLoaderUtils;
 import net.minecraftforge.fml.loading.moddiscovery.BackgroundScanHandler;
 import net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer;
 import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import net.minecraftforge.fml.loading.moddiscovery.ModValidator;
 import net.minecraftforge.accesstransformer.service.AccessTransformerService;
 import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.fml.loading.progress.StartupNotificationManager;
 import net.minecraftforge.fml.loading.targets.CommonLaunchHandler;
 import net.minecraftforge.forgespi.Environment;
+import net.minecraftforge.forgespi.coremod.ICoreModProvider;
+import org.apache.commons.lang3.tuple.Pair;
 import org.slf4j.Logger;
 
 import java.nio.file.Path;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.Optional;
-import java.util.ServiceConfigurationError;
-import java.util.ServiceLoader;
-import java.util.Set;
+import java.nio.file.Paths;
+import java.util.*;
 import java.util.function.BiFunction;
+import java.util.stream.Collectors;
+
 import static net.minecraftforge.fml.loading.LogMarkers.CORE;
 import static net.minecraftforge.fml.loading.LogMarkers.SCAN;
 
-public class FMLLoader {
+public class FMLLoader
+{
     private static final Logger LOGGER = LogUtils.getLogger();
     private static AccessTransformerService accessTransformer;
+    private static ModDiscoverer modDiscoverer;
+    private static ICoreModProvider coreModProvider;
+    private static ILaunchPluginService eventBus;
     private static LanguageLoadingProvider languageLoadingProvider;
     private static Dist dist;
     private static String naming;
     private static LoadingModList loadingModList;
     private static RuntimeDistCleaner runtimeDistCleaner;
     private static Path gamePath;
-    private static final VersionInfo versionInfo = VersionInfo.detect();
+    private static VersionInfo versionInfo;
     private static String launchHandlerName;
     private static CommonLaunchHandler commonLaunchHandler;
     public static Runnable progressWindowTick;
@@ -48,73 +54,80 @@ public class FMLLoader {
     private static boolean production;
     private static IModuleLayerManager moduleLayerManager;
 
-    static void onInitialLoad(IEnvironment env, Set<String> otherServices) throws IncompatibleEnvironmentException {
-        LOGGER.debug(CORE, "Detected version data : {}", versionInfo);
-        LOGGER.debug(CORE, "FML {} loading", LauncherVersion.getVersion());
+    static void onInitialLoad(IEnvironment environment, Set<String> otherServices) throws IncompatibleEnvironmentException
+    {
+        final String version = LauncherVersion.getVersion();
+        LOGGER.debug(CORE,"FML {} loading", version);
+        final Package modLauncherPackage = ITransformationService.class.getPackage();
+        LOGGER.debug(CORE,"FML found ModLauncher version : {}", modLauncherPackage.getImplementationVersion());
+        if (!modLauncherPackage.isCompatibleWith("4.0")) {
+            LOGGER.error(CORE, "Found incompatible ModLauncher specification : {}, version {} from {}", modLauncherPackage.getSpecificationVersion(), modLauncherPackage.getImplementationVersion(), modLauncherPackage.getImplementationVendor());
+            throw new IncompatibleEnvironmentException("Incompatible modlauncher found "+modLauncherPackage.getSpecificationVersion());
+        }
 
-        checkPackage(ITransformationService.class, "4.0", "ModLauncher");
-        accessTransformer  = getPlugin(env, "accesstransformer",  "1.0", "AccessTransformer");
-        runtimeDistCleaner = getPlugin(env, "runtimedistcleaner", "1.0", "RuntimeDistCleaner");
-        checkPackage(Environment.class, "2.0", "ForgeSPI");
+        accessTransformer = (AccessTransformerService) environment.findLaunchPlugin("accesstransformer").orElseThrow(()-> {
+            LOGGER.error(CORE, "Access Transformer library is missing, we need this to run");
+            return new IncompatibleEnvironmentException("Missing AccessTransformer, cannot run");
+        });
+
+        final Package atPackage = accessTransformer.getClass().getPackage();
+        LOGGER.debug(CORE,"FML found AccessTransformer version : {}", atPackage.getImplementationVersion());
+        if (!atPackage.isCompatibleWith("1.0")) {
+            LOGGER.error(CORE, "Found incompatible AccessTransformer specification : {}, version {} from {}", atPackage.getSpecificationVersion(), atPackage.getImplementationVersion(), atPackage.getImplementationVendor());
+            throw new IncompatibleEnvironmentException("Incompatible accesstransformer found "+atPackage.getSpecificationVersion());
+        }
+
+        eventBus = environment.findLaunchPlugin("eventbus").orElseThrow(()-> {
+            LOGGER.error(CORE, "Event Bus library is missing, we need this to run");
+            return new IncompatibleEnvironmentException("Missing EventBus, cannot run");
+        });
+
+        final Package eventBusPackage = eventBus.getClass().getPackage();
+        LOGGER.debug(CORE,"FML found EventBus version : {}", eventBusPackage.getImplementationVersion());
+        if (!eventBusPackage.isCompatibleWith("1.0")) {
+            LOGGER.error(CORE, "Found incompatible EventBus specification : {}, version {} from {}", eventBusPackage.getSpecificationVersion(), eventBusPackage.getImplementationVersion(), eventBusPackage.getImplementationVendor());
+            throw new IncompatibleEnvironmentException("Incompatible eventbus found "+eventBusPackage.getSpecificationVersion());
+        }
+
+        runtimeDistCleaner = (RuntimeDistCleaner)environment.findLaunchPlugin("runtimedistcleaner").orElseThrow(()-> {
+            LOGGER.error(CORE, "Dist Cleaner is missing, we need this to run");
+            return new IncompatibleEnvironmentException("Missing DistCleaner, cannot run!");
+        });
+        LOGGER.debug(CORE, "Found Runtime Dist Cleaner");
+
+        var coreModProviders = ServiceLoaderUtils.streamWithErrorHandling(ServiceLoader.load(FMLLoader.class.getModule().getLayer(), ICoreModProvider.class), sce -> LOGGER.error(CORE, "Failed to load a coremod library, expect problems", sce)).toList();
+
+        if (coreModProviders.isEmpty()) {
+            LOGGER.error(CORE, "Found no coremod provider. Cannot run");
+            throw new IncompatibleEnvironmentException("No coremod library found");
+        } else if (coreModProviders.size() > 1) {
+            LOGGER.error(CORE, "Found multiple coremod providers : {}. Cannot run", coreModProviders.stream().map(p -> p.getClass().getName()).collect(Collectors.toList()));
+            throw new IncompatibleEnvironmentException("Multiple coremod libraries found");
+        }
+
+        coreModProvider = coreModProviders.get(0);
+        final Package coremodPackage = coreModProvider.getClass().getPackage();
+        LOGGER.debug(CORE,"FML found CoreMod version : {}", coremodPackage.getImplementationVersion());
+
+
+        LOGGER.debug(CORE, "Found ForgeSPI package implementation version {}", Environment.class.getPackage().getImplementationVersion());
+        LOGGER.debug(CORE, "Found ForgeSPI package specification {}", Environment.class.getPackage().getSpecificationVersion());
+        if (Integer.parseInt(Environment.class.getPackage().getSpecificationVersion()) < 2) {
+            LOGGER.error(CORE, "Found an out of date ForgeSPI implementation: {}, loading cannot continue", Environment.class.getPackage().getSpecificationVersion());
+            throw new IncompatibleEnvironmentException("ForgeSPI is out of date, we cannot continue");
+        }
 
         try {
-            Class.forName("com.electronwill.nightconfig.core.Config", false, env.getClass().getClassLoader());
-            Class.forName("com.electronwill.nightconfig.toml.TomlFormat", false, env.getClass().getClassLoader());
+            Class.forName("com.electronwill.nightconfig.core.Config", false, environment.getClass().getClassLoader());
+            Class.forName("com.electronwill.nightconfig.toml.TomlFormat", false, environment.getClass().getClassLoader());
         } catch (ClassNotFoundException e) {
             LOGGER.error(CORE, "Failed to load NightConfig");
             throw new IncompatibleEnvironmentException("Missing NightConfig");
         }
     }
 
-    @SuppressWarnings("unchecked")
-    private static <T> T getPlugin(IEnvironment env, String id, String version, String name) throws IncompatibleEnvironmentException {
-        var plugin = env.findLaunchPlugin(id).orElse(null);
-        if (plugin == null) {
-            LOGGER.error(CORE, "{} library is missing, we need this to run", name);
-            throw new IncompatibleEnvironmentException("Missing " + name + ", cannot run");
-        }
-        checkPackage(plugin.getClass(), version, name);
-        return (T) plugin;
-    }
-
-    private static void checkPackage(Class<?> cls, String version, String name) throws IncompatibleEnvironmentException {
-        var pkg = cls.getPackage();
-        var info = JarVersionLookupHandler.getInfo(pkg);
-        LOGGER.debug(CORE, "Found {} version: {}", name, info.impl().version().orElse("MISSING"));
-
-        if (!pkg.isCompatibleWith(version)) {
-            LOGGER.error(CORE, "Found incompatible {} specification: {}, version {} from {}", name,
-                 info.spec().version().orElse("MISSING"),
-                 info.impl().version().orElse("MISSING"),
-                 info.impl().vendor().orElse("MISSING")
-             );
-            throw new IncompatibleEnvironmentException("Incompatible " + name + " found " + info.spec().version().orElse("MISSING"));
-        }
-    }
-
-    @SuppressWarnings("unused")
-    private static <T> T getSingleService(Class<T> clazz, String name) throws IncompatibleEnvironmentException {
-          var providers = new ArrayList<T>();
-          for (var itr = ServiceLoader.load(FMLLoader.class.getModule().getLayer(), clazz).iterator(); itr.hasNext(); ) {
-              try {
-                  providers.add(itr.next());
-              } catch (ServiceConfigurationError e) {
-                  LOGGER.error(CORE, "Failed to load a " + name + " library, expect problems", e);
-              }
-          }
-
-          if (providers.isEmpty()) {
-              LOGGER.error(CORE, "Found no {} provider. Cannot run", name);
-              throw new IncompatibleEnvironmentException("No " + name + " library found");
-          } else if (providers.size() > 1) {
-              LOGGER.error(CORE, "Found multiple {} providers: {}. Cannot run", name, providers.stream().map(p -> p.getClass().getName()).toList());
-              throw new IncompatibleEnvironmentException("Multiple " + name + " libraries found");
-          }
-
-          return providers.get(0);
-    }
-
-    static void setupLaunchHandler(final IEnvironment environment, final Map<String, Object> arguments) {
+    static void setupLaunchHandler(final IEnvironment environment, final Map<String, Object> arguments)
+    {
         final String launchTarget = environment.getProperty(IEnvironment.Keys.LAUNCHTARGET.get()).orElse("MISSING");
         arguments.put("launchTarget", launchTarget);
         final Optional<ILaunchHandlerService> launchHandler = environment.findLaunchHandler(launchTarget);
@@ -124,27 +137,31 @@ public class FMLLoader {
             throw new RuntimeException("Missing launch handler: " + launchTarget);
         }
 
-        // TODO: [FML][Loader] What the fuck is the point of using a service if you require a specific concrete class
         if (!(launchHandler.get() instanceof CommonLaunchHandler)) {
             LOGGER.error(CORE, "Incompatible Launch handler found - type {}, cannot continue", launchHandler.get().getClass().getName());
             throw new RuntimeException("Incompatible launch handler found");
         }
         commonLaunchHandler = (CommonLaunchHandler)launchHandler.get();
         launchHandlerName = launchHandler.get().name();
-        gamePath = environment.getProperty(IEnvironment.Keys.GAMEDIR.get()).orElse(Path.of(".").toAbsolutePath());
+        gamePath = environment.getProperty(IEnvironment.Keys.GAMEDIR.get()).orElse(Paths.get(".").toAbsolutePath());
 
         naming = commonLaunchHandler.getNaming();
         dist = commonLaunchHandler.getDist();
         production = commonLaunchHandler.isProduction();
 
-        accessTransformer.getExtension().accept(Map.entry(naming, "srg"));
+        versionInfo = new VersionInfo(arguments);
+
+        accessTransformer.getExtension().accept(Pair.of(naming, "srg"));
+
+        LOGGER.debug(CORE,"Received command line version data  : {}", versionInfo);
 
         runtimeDistCleaner.getExtension().accept(dist);
     }
-
-    public static List<ITransformationService.Resource> beginModScan(final Map<String,?> arguments) {
-        LOGGER.debug(SCAN, "Scanning for Mod Locators");
-        modValidator = ModDiscoverer.discoverMods(arguments);
+    public static List<ITransformationService.Resource> beginModScan(final Map<String,?> arguments)
+    {
+        LOGGER.debug(SCAN,"Scanning for Mod Locators");
+        modDiscoverer = new ModDiscoverer(arguments);
+        modValidator = modDiscoverer.discoverMods();
         var pluginResources = modValidator.getPluginResources();
         return List.of(pluginResources);
     }
@@ -157,34 +174,48 @@ public class FMLLoader {
         return List.of(modValidator.getModResources());
     }
 
-    public static LanguageLoadingProvider getLanguageLoadingProvider() {
+    public static ICoreModProvider getCoreModProvider() {
+        return coreModProvider;
+    }
+
+    public static LanguageLoadingProvider getLanguageLoadingProvider()
+    {
         return languageLoadingProvider;
     }
 
+    static ModDiscoverer getModDiscoverer() {
+        return modDiscoverer;
+    }
+
     public static CommonLaunchHandler getLaunchHandler() {
         return commonLaunchHandler;
     }
 
-    public static void addAccessTransformer(Path atPath, ModFile modName) {
-        LOGGER.debug(SCAN, "Adding Access Transformer {} in {}", atPath, modName.getFilePath());
+    public static void addAccessTransformer(Path atPath, ModFile modName)
+    {
+        LOGGER.debug(SCAN, "Adding Access Transformer in {}", modName.getFilePath());
         accessTransformer.offerResource(atPath, modName.getFileName());
     }
 
-    public static Dist getDist() {
+    public static Dist getDist()
+    {
         return dist;
     }
 
-    public static void beforeStart(ModuleLayer gameLayer) {
+    public static void beforeStart(ModuleLayer gameLayer)
+    {
         ImmediateWindowHandler.acceptGameLayer(gameLayer);
         ImmediateWindowHandler.updateProgress("Launching minecraft");
         progressWindowTick.run();
     }
 
-    public static LoadingModList getLoadingModList() {
+    public static LoadingModList getLoadingModList()
+    {
         return loadingModList;
     }
 
-    public static Path getGamePath() {
+    public static Path getGamePath()
+    {
         return gamePath;
     }
 
@@ -201,7 +232,7 @@ public class FMLLoader {
     }
 
     public static List<Map<String, String>> modLauncherModList() {
-        return Launcher.INSTANCE.environment().getProperty(IEnvironment.Keys.MODLIST.get()).orElse(List.of());
+        return Launcher.INSTANCE.environment().getProperty(IEnvironment.Keys.MODLIST.get()).orElseGet(Collections::emptyList);
     }
 
     public static String launcherHandlerName() {

fmlloader/src/main/java/net/minecraftforge/fml/loading/FMLServiceProvider.java

@@ -7,31 +7,53 @@ package net.minecraftforge.fml.loading;
 
 import com.mojang.logging.LogUtils;
 import cpw.mods.modlauncher.api.*;
+import joptsimple.ArgumentAcceptingOptionSpec;
+import joptsimple.OptionSpecBuilder;
 import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import net.minecraftforge.forgespi.Environment;
 import org.jetbrains.annotations.NotNull;
 import org.slf4j.Logger;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
+import java.util.function.BiFunction;
 import static net.minecraftforge.fml.loading.LogMarkers.CORE;
 
-public class FMLServiceProvider implements ITransformationService {
+public class FMLServiceProvider implements ITransformationService
+{
     private static final Logger LOGGER = LogUtils.getLogger();
-    private final Map<String, Object> arguments = new HashMap<>();
+    private ArgumentAcceptingOptionSpec<String> modsOption;
+    private ArgumentAcceptingOptionSpec<String> modListsOption;
+    private ArgumentAcceptingOptionSpec<String> mavenRootsOption;
+    private ArgumentAcceptingOptionSpec<String> forgeOption;
+    private ArgumentAcceptingOptionSpec<String> mcOption;
+    private ArgumentAcceptingOptionSpec<String> forgeGroupOption;
+    private ArgumentAcceptingOptionSpec<String> mcpOption;
+    private ArgumentAcceptingOptionSpec<String> mappingsOption;
+    private List<String> modsArgumentList;
+    private List<String> modListsArgumentList;
+    private List<String> mavenRootsArgumentList;
+    private String targetForgeVersion;
+    private String targetMcVersion;
+    private String targetMcpVersion;
+    private String targetMcpMappings;
+    private String targetForgeGroup;
+    private Map<String, Object> arguments;
 
-    public FMLServiceProvider() {
-        var markers = System.getProperty("forge.logging.markers", "").split(",");
-        for (var marker : markers)
-            System.setProperty("forge.logging.marker." + marker.toLowerCase(Locale.ROOT), "ACCEPT");
+    public FMLServiceProvider()
+    {
+        final String markerselection = System.getProperty("forge.logging.markers", "");
+        Arrays.stream(markerselection.split(",")).forEach(marker -> System.setProperty("forge.logging.marker." + marker.toLowerCase(Locale.ROOT), "ACCEPT"));
     }
 
     @Override
-    public String name() {
+    public String name()
+    {
         return "fml";
     }
 
@@ -43,6 +65,15 @@ public class FMLServiceProvider implements ITransformationService {
         FMLConfig.load();
         LOGGER.debug(CORE, "Preparing ModFile");
         environment.computePropertyIfAbsent(Environment.Keys.MODFILEFACTORY.get(), k->ModFile::new);
+        arguments = new HashMap<>();
+        arguments.put("modLists", modListsArgumentList);
+        arguments.put("mods", modsArgumentList);
+        arguments.put("mavenRoots", mavenRootsArgumentList);
+        arguments.put("forgeVersion", targetForgeVersion);
+        arguments.put("forgeGroup", targetForgeGroup);
+        arguments.put("mcVersion", targetMcVersion);
+        arguments.put("mcpVersion", targetMcpVersion);
+        arguments.put("mcpMappings", targetMcpMappings);
         LOGGER.debug(CORE, "Preparing launch handler");
         FMLLoader.setupLaunchHandler(environment, arguments);
         FMLEnvironment.setupInteropEnvironment(environment);
@@ -61,13 +92,45 @@ public class FMLServiceProvider implements ITransformationService {
     }
 
     @Override
-    public void onLoad(IEnvironment environment, Set<String> otherServices) throws IncompatibleEnvironmentException {
+    public void onLoad(IEnvironment environment, Set<String> otherServices) throws IncompatibleEnvironmentException
+    {
+//        LOGGER.debug("Injecting tracing printstreams for STDOUT/STDERR.");
+//        System.setOut(new TracingPrintStream(LogManager.getLogger("STDOUT"), System.out));
+//        System.setErr(new TracingPrintStream(LogManager.getLogger("STDERR"), System.err));
         FMLLoader.onInitialLoad(environment, otherServices);
     }
 
-    @SuppressWarnings("rawtypes")
     @Override
-    public @NotNull List<ITransformer> transformers() {
-        return List.of();
+    public void arguments(BiFunction<String, String, OptionSpecBuilder> argumentBuilder)
+    {
+        forgeOption = argumentBuilder.apply("forgeVersion", "Forge Version number").withRequiredArg().ofType(String.class).required();
+        forgeGroupOption = argumentBuilder.apply("forgeGroup", "Forge Group (for testing)").withRequiredArg().ofType(String.class).defaultsTo("net.minecraftforge");
+        mcOption = argumentBuilder.apply("mcVersion", "Minecraft Version number").withRequiredArg().ofType(String.class).required();
+        mcpOption = argumentBuilder.apply("mcpVersion", "MCP Version number").withRequiredArg().ofType(String.class).required();
+        mappingsOption = argumentBuilder.apply("mcpMappings", "MCP Mappings Channel and Version").withRequiredArg().ofType(String.class);
+        modsOption = argumentBuilder.apply("mods", "List of mods to add").withRequiredArg().ofType(String.class).withValuesSeparatedBy(",");
+        modListsOption = argumentBuilder.apply("modLists", "JSON modlists").withRequiredArg().ofType(String.class).withValuesSeparatedBy(",");
+        mavenRootsOption = argumentBuilder.apply("mavenRoots", "Maven root directories").withRequiredArg().ofType(String.class).withValuesSeparatedBy(",");
     }
+
+    @Override
+    public void argumentValues(OptionResult option)
+    {
+        modsArgumentList = option.values(modsOption);
+        modListsArgumentList = option.values(modListsOption);
+        mavenRootsArgumentList = option.values(mavenRootsOption);
+        targetForgeVersion = option.value(forgeOption);
+        targetForgeGroup = option.value(forgeGroupOption);
+        targetMcVersion = option.value(mcOption);
+        targetMcpVersion = option.value(mcpOption);
+        targetMcpMappings = option.value(mappingsOption);
+    }
+
+    @Override
+    public @NotNull List<ITransformer> transformers()
+    {
+        LOGGER.debug(CORE, "Loading coremod transformers");
+        return new ArrayList<>(FMLLoader.getCoreModProvider().getCoreModTransformers());
+    }
+
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/FileUtils.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) Forge Development LLC and contributors
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.fml.loading;
+
+import java.io.File;
+import java.nio.file.Path;
+
+public class FileUtils
+{
+
+    public static String fileExtension(final Path path) {
+        String fileName = path.getFileName().toString();
+        int idx = fileName.lastIndexOf('.');
+        if (idx > -1) {
+            return fileName.substring(idx+1);
+        } else {
+            return "";
+        }
+    }
+
+    public static boolean matchFileName(String path, String... matches) {
+        // Extract file name from path
+        String name = path.substring(Math.min(path.lastIndexOf(File.separatorChar) + 1, path.length()));
+        // Check if it contains any of the desired keywords
+        for (String match : matches) {
+            if (name.contains(match)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

fmlloader/src/main/java/net/minecraftforge/fml/loading/ImmediateWindowHandler.java

@@ -23,7 +23,7 @@ public class ImmediateWindowHandler {
 
     private static ProgressMeter earlyProgress;
     public static void load(final String launchTarget, final String[] arguments) {
-        if (!launchTarget.contains("client")) {
+        if (!List.of("forgeclient", "forgeclientuserdev", "forgeclientdev").contains(launchTarget)) {
             provider = new DummyProvider();
             LOGGER.info("ImmediateWindowProvider not loading because launch target is {}", launchTarget);
         } else if (!FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_CONTROL)) {
@@ -32,16 +32,15 @@ public class ImmediateWindowHandler {
         } else {
             final var providername = FMLConfig.getConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_PROVIDER);
             LOGGER.info("Loading ImmediateWindowProvider {}", providername);
-            for (var service : ServiceLoader.load(ImmediateWindowProvider.class)) {
-                if (providername.equals(service.name())) {
-                    provider = service;
-                    break;
-                }
-            }
-            if (provider == null) {
+            final var maybeProvider = ServiceLoader.load(ImmediateWindowProvider.class)
+                    .stream()
+                    .map(ServiceLoader.Provider::get)
+                    .filter(p -> Objects.equals(p.name(), providername))
+                    .findFirst();
+            provider = maybeProvider.or(() -> {
                 LOGGER.info("Failed to find ImmediateWindowProvider {}, disabling", providername);
-                provider = new DummyProvider();
-            }
+                return Optional.of(new DummyProvider());
+            }).orElseThrow();
         }
         // Only update config if the provider isn't the dummy provider
         if (!Objects.equals(provider.name(), "dummyprovider"))
@@ -140,7 +139,7 @@ public class ImmediateWindowHandler {
 
         @Override
         public void updateModuleReads(final ModuleLayer layer) {
-            var fm = layer.findModule("net.minecraftforge.forge");
+            var fm = layer.findModule("forge");
             if (fm.isPresent()) {
                 getClass().getModule().addReads(fm.get());
                 var clz = fm.map(l -> Class.forName(l, "net.minecraftforge.client.loading.NoVizFallback")).orElseThrow();

fmlloader/src/main/java/net/minecraftforge/fml/loading/JarVersionLookupHandler.java

@@ -11,72 +11,31 @@ import java.util.Optional;
  * Finds Version data from a package, with possible default values
  */
 public class JarVersionLookupHandler {
-    public record Version(Optional<String> title, Optional<String> vendor, Optional<String> version) {
-        @Override
-        public String toString() {
-            return "[" +
-                "title=" + title.orElse(null) +
-                ", vendor=" + vendor.orElse(null) +
-                ", version=" + version.orElse(null) +
-            "]";
-        }
-    }
-    public record Info(Version spec, Version impl) {}
-
-    @SuppressWarnings("deprecation")
-    public static Info getInfo(String pkgName) {
-        return getInfo(Package.getPackage(pkgName));
-    }
-
-    public static Info getInfo(Class<?> clazz) {
-        return getInfo(clazz.getPackage());
-    }
-
-    public static Info getInfo(Package pkg) {
-        return new Info(
-            new Version(
-                Optional.ofNullable(pkg.getSpecificationTitle()),
-                Optional.ofNullable(pkg.getSpecificationVendor()),
-                Optional.ofNullable(pkg.getSpecificationVersion())
-            ),
-            new Version(
-                Optional.ofNullable(pkg.getImplementationTitle()),
-                Optional.ofNullable(pkg.getImplementationVendor()),
-                Optional.ofNullable(pkg.getImplementationVersion())
-            )
-        );
-    }
-
-
-    @Deprecated(forRemoval = true, since = "1.20.2")
     public static Optional<String> getImplementationVersion(final String pkgName) {
         // Note that with Java 9, you'll probably want the module's version data, hence pulling this out
         final String pkgVersion = Package.getPackage(pkgName).getImplementationVersion();
         return Optional.ofNullable(pkgVersion);
     }
 
-    @Deprecated(forRemoval = true, since = "1.20.2")
     public static Optional<String> getSpecificationVersion(final String pkgName) {
         // Note that with Java 9, you'll probably want the module's version data, hence pulling this out
         final String pkgVersion = Package.getPackage(pkgName).getSpecificationVersion();
         return Optional.ofNullable(pkgVersion);
     }
 
-    @Deprecated(forRemoval = true, since = "1.20.2")
     public static Optional<String> getImplementationVersion(final Class<?> clazz) {
         // With java 9 we'll use the module's version if it exists in preference.
         final String pkgVersion = clazz.getPackage().getImplementationVersion();
         return Optional.ofNullable(pkgVersion);
     }
 
-    @Deprecated(forRemoval = true, since = "1.20.2")
     public static Optional<String> getImplementationTitle(final Class<?> clazz) {
         // With java 9 we'll use the module's version if it exists in preference.
         final String pkgVersion = clazz.getPackage().getImplementationTitle();
         return Optional.ofNullable(pkgVersion);
     }
 
-    @Deprecated(forRemoval = true, since = "1.20.2")
+
     public static Optional<String> getSpecificationVersion(final Class<?> clazz) {
         // With java 9 we'll use the module's version if it exists in preference.
         final String pkgVersion = clazz.getPackage().getSpecificationVersion();

fmlloader/src/main/java/net/minecraftforge/fml/loading/LanguageLoadingProvider.java

@@ -7,19 +7,27 @@ package net.minecraftforge.fml.loading;
 
 import com.mojang.logging.LogUtils;
 import cpw.mods.modlauncher.Launcher;
-import cpw.mods.modlauncher.api.IModuleLayerManager.Layer;
+import cpw.mods.modlauncher.api.IModuleLayerManager;
+import cpw.mods.modlauncher.util.ServiceLoaderUtils;
+import net.minecraftforge.fml.loading.progress.StartupNotificationManager;
 import net.minecraftforge.forgespi.language.IModLanguageProvider;
+import net.minecraftforge.fml.loading.moddiscovery.ExplodedDirectoryLocator;
 import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import org.apache.maven.artifact.versioning.ArtifactVersion;
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
 import org.apache.maven.artifact.versioning.VersionRange;
 import org.slf4j.Logger;
 
+import java.net.URISyntaxException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.ServiceConfigurationError;
+import java.util.Optional;
 import java.util.ServiceLoader;
 import java.util.function.Consumer;
 import java.util.function.Function;
@@ -28,97 +36,115 @@ import java.util.stream.Stream;
 import static net.minecraftforge.fml.loading.LogMarkers.CORE;
 import static net.minecraftforge.fml.loading.LogMarkers.LOADING;
 
-public class LanguageLoadingProvider {
-    public void forEach(Consumer<IModLanguageProvider> consumer) {
-        providers.forEach(consumer);
-    }
-
-    public <T> Stream<T> applyForEach(Function<IModLanguageProvider, T> function) {
-        return providers.stream().map(function);
-    }
-
-    public void reload() {
-        loadLanguageProviders();
-    }
-
-    /** This doesn't actually do anything with the argument, so just call reload(). Not sure when cpw broke that. */
-    @Deprecated(forRemoval = true, since = "1.20.2")
-    public void addAdditionalLanguages(List<ModFile> modFiles) {
-        reload();
-    }
-
-    /*==========================================================================*
-     *                        INTERNAL SHIT                                     *
-     *==========================================================================*/
+public class LanguageLoadingProvider
+{
     private static final Logger LOGGER = LogUtils.getLogger();
+    private final List<IModLanguageProvider> languageProviders = new ArrayList<>();
     private final ServiceLoader<IModLanguageProvider> serviceLoader;
-    private final List<IModLanguageProvider> providers = new ArrayList<>();
-    private final Map<String, Wrapper> providersByName = new HashMap<>();
-    private static final DefaultArtifactVersion IN_DEV = new DefaultArtifactVersion("0.0-dev");
+    private final Map<String, ModLanguageWrapper> languageProviderMap = new HashMap<>();
+    private List<Path> languagePaths = new ArrayList<>();
 
-    private record Wrapper(ArtifactVersion version, IModLanguageProvider service) {}
+    public void forEach(final Consumer<IModLanguageProvider> consumer)
+    {
+        languageProviders.forEach(consumer);
+    }
+
+    public <T> Stream<T> applyForEach(final Function<IModLanguageProvider, T> function) {
+        return languageProviders.stream().map(function);
+    }
+
+    private static class ModLanguageWrapper {
+        private final IModLanguageProvider modLanguageProvider;
+
+        private final ArtifactVersion version;
+        public ModLanguageWrapper(IModLanguageProvider modLanguageProvider, ArtifactVersion version)
+        {
+            this.modLanguageProvider = modLanguageProvider;
+            this.version = version;
+        }
+        public ArtifactVersion getVersion()
+        {
+            return version;
+        }
+
+        public IModLanguageProvider getModLanguageProvider()
+        {
+            return modLanguageProvider;
+        }
+
+
+    }
 
     LanguageLoadingProvider() {
-        var sl = Launcher.INSTANCE.environment().findModuleLayerManager().flatMap(lm -> lm.getLayer(Layer.PLUGIN)).orElseThrow();
+        var sl = Launcher.INSTANCE.environment().findModuleLayerManager().flatMap(lm->lm.getLayer(IModuleLayerManager.Layer.PLUGIN)).orElseThrow();
         serviceLoader = ServiceLoader.load(sl, IModLanguageProvider.class);
         loadLanguageProviders();
     }
-
     private void loadLanguageProviders() {
-        providers.clear();
-        providersByName.clear();
-
-        serviceLoader.reload();
-        for (var itr = serviceLoader.iterator(); itr.hasNext(); ) {
-            try {
-                var srvc = itr.next();
-                providers.add(srvc);
-            } catch (ServiceConfigurationError sce) {
-                LOGGER.error(CORE, "Failed to load IModLauguageProvider Service: " + sce.getMessage());
-            }
-        }
-
-        LOGGER.debug(CORE, "Found {} language providers", providers.size());
-
+        LOGGER.debug(CORE, "Found {} language providers", ServiceLoaderUtils.streamServiceLoader(()->serviceLoader, sce->LOGGER.error("Problem with language loaders")).count());
+        serviceLoader.forEach(languageProviders::add);
         ImmediateWindowHandler.updateProgress("Loading language providers");
-        for (var provider : providers) {
-            var info = JarVersionLookupHandler.getInfo(provider.getClass());
-
-            if (info.impl().version().isEmpty() && FMLEnvironment.production) {
-                LOGGER.error(CORE, "Found unversioned language provider {}: {}", provider.name(), provider.getClass().getName());
-                throw new RuntimeException("Failed to find implementation version for language provider " + provider.name() + " of type " + provider.getClass().getName());
+        languageProviders.forEach(lp -> {
+            final Path lpPath;
+            try {
+                lpPath = Paths.get(lp.getClass().getProtectionDomain().getCodeSource().getLocation().toURI());
+            } catch (URISyntaxException e) {
+                throw new RuntimeException("Huh?", e);
             }
+            Optional<String> implementationVersion = JarVersionLookupHandler.getImplementationVersion(lp.getClass());
+            String impl = implementationVersion.orElse(Files.isDirectory(lpPath) ? FMLLoader.versionInfo().forgeVersion().split("\\.")[0] : null);
+            if (impl == null) {
+                LOGGER.error(CORE, "Found unversioned language provider {}", lp.name());
+                throw new RuntimeException("Failed to find implementation version for language provider "+ lp.name());
+            }
+            LOGGER.debug(CORE, "Found language provider {}, version {}", lp.name(), impl);
+            ImmediateWindowHandler.updateProgress("Loaded language provider "+lp.name()+ " " + impl);
+            languageProviderMap.put(lp.name(), new ModLanguageWrapper(lp, new DefaultArtifactVersion(impl)));
+        });
+    }
 
-            var version = info.impl().version().map(DefaultArtifactVersion::new).orElse(IN_DEV);
-
-            LOGGER.debug(CORE, "Found language provider {}, version {}", provider.name(), version);
-            ImmediateWindowHandler.updateProgress("Loaded language provider " + provider.name() + " " + version);
-            providersByName.put(provider.name(), new Wrapper(version, provider));
+    void addForgeLanguage(final Path forgePath) {
+        if (!languageProviderMap.containsKey("javafml")) {
+            LOGGER.debug(CORE,"Adding forge as a language from {}", forgePath.toString());
+            addLanguagePaths(Stream.of(forgePath));
+            serviceLoader.reload();
+            loadLanguageProviders();
+        } else {
+            LOGGER.debug(CORE, "Skipping adding forge jar - javafml is already present");
         }
     }
 
-    public IModLanguageProvider findLanguage(ModFile mod, String language, VersionRange versionRange) {
-        var consumer = mod.getFileName();
-        var wrapper = providersByName.get(language);
+    private void addLanguagePaths(final Stream<Path> langPaths) {
+        languageProviders.clear();
+        languageProviderMap.clear();
+//        langPaths.peek(languagePaths::add).map(Path::toFile).map(File::toURI).map(rethrowFunction(URI::toURL)).forEach(languageClassLoader::addURL);
+    }
 
-        if (wrapper == null) {
-            LOGGER.error(LOADING, "Missing language {} version {} wanted by {}", language, versionRange, consumer);
-            var data = new EarlyLoadingException.ExceptionData("fml.language.missingversion", language, versionRange, consumer, "null");
-            throw new EarlyLoadingException("Missing language " + language, null, List.of(data));
+    public void addAdditionalLanguages(List<ModFile> modFiles)
+    {
+        if (modFiles==null) return;
+        Stream<Path> langPaths = modFiles.stream().map(ModFile::getFilePath);
+        addLanguagePaths(langPaths);
+        serviceLoader.reload();
+        loadLanguageProviders();
+    }
+
+    Stream<Path> getLibraries() {
+        return languagePaths.stream();
+    }
+
+    public IModLanguageProvider findLanguage(ModFile mf, String modLoader, VersionRange modLoaderVersion) {
+        final String languageFileName = mf.getProvider() instanceof ExplodedDirectoryLocator ? "in-development" : mf.getFileName();
+        final ModLanguageWrapper mlw = languageProviderMap.get(modLoader);
+        if (mlw == null) {
+            LOGGER.error(LOADING,"Missing language {} version {} wanted by {}", modLoader, modLoaderVersion, languageFileName);
+            throw new EarlyLoadingException("Missing language "+modLoader, null, Collections.singletonList(new EarlyLoadingException.ExceptionData("fml.language.missingversion", modLoader, modLoaderVersion, languageFileName, "null")));
+        }
+        if (!VersionSupportMatrix.testVersionSupportMatrix(modLoaderVersion, modLoader, "languageloader", (llid, range) -> range.containsVersion(mlw.getVersion()))) {
+            LOGGER.error(LOADING,"Missing language {} version {} wanted by {}, found {}", modLoader, modLoaderVersion, languageFileName, mlw.getVersion());
+            throw new EarlyLoadingException("Missing language "+ modLoader + " matching range "+modLoaderVersion + " found "+mlw.getVersion(), null, Collections.singletonList(new EarlyLoadingException.ExceptionData("fml.language.missingversion", modLoader, modLoaderVersion, languageFileName, mlw.getVersion())));
         }
 
-        var version = wrapper.version();
-        if (version == IN_DEV) {
-            LOGGER.debug(LOADING, "Language Provider {} version is unknown, but {} was requested by {}. Proceeding as this is development environement", language, versionRange, consumer);
-            return wrapper.service();
-        }
-
-        if (!versionRange.containsVersion(version)) {
-            LOGGER.error(LOADING, "Missing language {} version {} wanted by {}, found {}", language, versionRange, consumer, version);
-            var data = new EarlyLoadingException.ExceptionData("fml.language.missingversion", language, versionRange, consumer, version);
-            throw new EarlyLoadingException("Missing language " + language + " matching range " + versionRange + " found " + version, null, List.of(data));
-        }
-
-        return wrapper.service();
+        return mlw.getModLanguageProvider();
     }
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/LauncherVersion.java

@@ -8,19 +8,21 @@ package net.minecraftforge.fml.loading;
 import com.mojang.logging.LogUtils;
 import org.slf4j.Logger;
 
+import static net.minecraftforge.fml.loading.LogMarkers.CORE;
+
 public class LauncherVersion {
     private static final Logger LOGGER = LogUtils.getLogger();
     private static final String launcherVersion;
 
     static {
-        var info = JarVersionLookupHandler.getInfo(LauncherVersion.class);
-        if (info.impl().version().isEmpty())
-            throw new IllegalStateException("Failed to find version for package " + LauncherVersion.class.getPackageName() + " This is an invalid environment");
-        launcherVersion = info.impl().version().get();
-        LOGGER.debug(LogMarkers.CORE, "Found FMLLauncher version {}", launcherVersion);
+        String vers = JarVersionLookupHandler.getImplementationVersion(LauncherVersion.class).orElse(System.getenv("LAUNCHER_VERSION"));
+        if (vers == null) throw new RuntimeException("Missing FMLLauncher version, cannot continue");
+        launcherVersion = vers;
+        LOGGER.debug(CORE, "Found FMLLauncher version {}", launcherVersion);
     }
 
-    public static String getVersion() {
+    public static String getVersion()
+    {
         return launcherVersion;
     }
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/LibraryFinder.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) Forge Development LLC and contributors
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.fml.loading;
+
+import com.mojang.logging.LogUtils;
+import org.slf4j.Logger;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+public class LibraryFinder {
+    private static final Logger LOGGER = LogUtils.getLogger();
+    private static Path libsPath;
+    static Path findLibsPath() {
+        if (libsPath == null) {
+            libsPath = Path.of(System.getProperty("libraryDirectory","crazysnowmannonsense/cheezwhizz"));
+            if (!Files.isDirectory(libsPath)) {
+                throw new IllegalStateException("Missing libraryDirectory system property, cannot continue");
+            }
+        }
+        return libsPath;
+    }
+
+    static Path getForgeLibraryPath(final String mcVersion, final String forgeVersion, final String forgeGroup) {
+        Path forgePath = findLibsPath().resolve(MavenCoordinateResolver.get(forgeGroup, "forge", "", "universal", mcVersion+"-"+forgeVersion));
+        LOGGER.debug(LogMarkers.CORE, "Found forge path {} is {}", forgePath, pathStatus(forgePath));
+        return forgePath;
+    }
+
+    static String pathStatus(final Path path) {
+        return Files.exists(path) ? "present" : "missing";
+    }
+
+    static Path[] getMCPaths(final String mcVersion, final String mcpVersion, final String forgeVersion, final String forgeGroup, final String type) {
+        Path srgMcPath = findLibsPath().resolve(MavenCoordinateResolver.get("net.minecraft", type, "", "srg", mcVersion+"-"+mcpVersion));
+        Path mcExtrasPath = findLibsPath().resolve(MavenCoordinateResolver.get("net.minecraft", type, "", "extra", mcVersion+"-"+mcpVersion));
+        Path patchedBinariesPath = findLibsPath().resolve(MavenCoordinateResolver.get(forgeGroup, "forge", "", type, mcVersion+"-"+forgeVersion));
+        LOGGER.debug(LogMarkers.CORE,"SRG MC at {} is {}", srgMcPath.toString(), pathStatus(srgMcPath));
+        LOGGER.debug(LogMarkers.CORE,"MC Extras at {} is {}", mcExtrasPath.toString(), pathStatus(mcExtrasPath));
+        LOGGER.debug(LogMarkers.CORE,"Forge patches at {} is {}", patchedBinariesPath.toString(), pathStatus(patchedBinariesPath));
+        return new Path[] { patchedBinariesPath, mcExtrasPath, srgMcPath };
+    }
+
+    public static Path findPathForMaven(final String group, final String artifact, final String extension, final String classifier, final String version) {
+        return findLibsPath().resolve(MavenCoordinateResolver.get(group, artifact, extension, classifier, version));
+    }
+    public static Path findPathForMaven(final String maven) {
+        return findLibsPath().resolve(MavenCoordinateResolver.get(maven));
+    }
+}

fmlloader/src/main/java/net/minecraftforge/fml/loading/LoadingModList.java

@@ -5,31 +5,31 @@
 
 package net.minecraftforge.fml.loading;
 
-import net.minecraftforge.fml.loading.EarlyLoadingException.ExceptionData;
+import cpw.mods.modlauncher.api.LamdbaExceptionUtils;
 import net.minecraftforge.fml.loading.moddiscovery.BackgroundScanHandler;
 import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import net.minecraftforge.fml.loading.moddiscovery.ModFileInfo;
 import net.minecraftforge.fml.loading.moddiscovery.ModInfo;
 import net.minecraftforge.forgespi.locating.IModFile;
 
+import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Enumeration;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.NoSuchElementException;
 import java.util.stream.Collectors;
 
-import org.slf4j.Logger;
-
-import com.mojang.logging.LogUtils;
-
 /**
  * Master list of all mods <em>in the loading context. This class cannot refer outside the
  * loading package</em>
  */
-public class LoadingModList {
-    private static final Logger LOGGER = LogUtils.getLogger();
+public class LoadingModList
+{
     private static LoadingModList INSTANCE;
     private final List<ModFileInfo> modFiles;
     private final List<ModInfo> sortedList;
@@ -37,12 +37,15 @@ public class LoadingModList {
     private final List<EarlyLoadingException> preLoadErrors;
     private List<IModFile> brokenFiles;
 
-    private LoadingModList(final List<ModFile> modFiles, final List<ModInfo> sortedList) {
+    private LoadingModList(final List<ModFile> modFiles, final List<ModInfo> sortedList)
+    {
         this.modFiles = modFiles.stream()
                 .map(ModFile::getModFileInfo)
                 .map(ModFileInfo.class::cast)
-                .toList();
-        this.sortedList = sortedList.stream().toList();
+                .collect(Collectors.toList());
+        this.sortedList = sortedList.stream()
+                .map(ModInfo.class::cast)
+                .collect(Collectors.toList());
         this.fileById = this.modFiles.stream()
                 .map(ModFileInfo::getMods)
                 .flatMap(Collection::stream)
@@ -51,48 +54,50 @@ public class LoadingModList {
         this.preLoadErrors = new ArrayList<>();
     }
 
-    public static LoadingModList of(List<ModFile> modFiles, List<ModInfo> sortedList, final EarlyLoadingException earlyLoadingException) {
+    public static LoadingModList of(List<ModFile> modFiles, List<ModInfo> sortedList, final EarlyLoadingException earlyLoadingException)
+    {
         INSTANCE = new LoadingModList(modFiles, sortedList);
         if (earlyLoadingException != null)
+        {
             INSTANCE.preLoadErrors.add(earlyLoadingException);
+        }
         return INSTANCE;
     }
 
     public static LoadingModList get() {
         return INSTANCE;
     }
-
-    public void addAccessTransformers() {
-        var errors = new ArrayList<ExceptionData>();
-
-        for (ModFileInfo modFile : modFiles) {
-            ModFile mod = modFile.getFile();
-            for (var at : mod.getAccessTransformers()) {
-                if (!Files.exists(at)) {
-                    var message = "Invalid mod file: " + modFile.getFile().getFileName() + ". Missing Access Transformer: " + at;
-                    errors.add(new ExceptionData(message));
-                    LOGGER.error(message);
-                } else
-                    FMLLoader.addAccessTransformer(at, mod);
-            }
-        }
-
-        if (!errors.isEmpty())
-            preLoadErrors.add(new EarlyLoadingException("Invalid Access Transformers", null, errors));
+    public void addCoreMods()
+    {
+        modFiles.stream()
+                .map(ModFileInfo::getFile)
+                .map(ModFile::getCoreMods)
+                .flatMap(List::stream)
+                .forEach(FMLLoader.getCoreModProvider()::addCoreMod);
     }
 
-    public void addForScanning(BackgroundScanHandler backgroundScanHandler) {
+    public void addAccessTransformers()
+    {
+        modFiles.stream()
+                .map(ModFileInfo::getFile)
+                .forEach(mod -> mod.getAccessTransformer().ifPresent(path -> FMLLoader.addAccessTransformer(path, mod)));
+    }
+
+    public void addForScanning(BackgroundScanHandler backgroundScanHandler)
+    {
         backgroundScanHandler.setLoadingModList(this);
         modFiles.stream()
                 .map(ModFileInfo::getFile)
                 .forEach(backgroundScanHandler::submitForScanning);
     }
 
-    public List<ModFileInfo> getModFiles() {
+    public List<ModFileInfo> getModFiles()
+    {
         return modFiles;
     }
 
-    public Path findResource(final String className) {
+    public Path findResource(final String className)
+    {
         for (ModFileInfo mf : modFiles) {
             final Path resource = mf.getFile().findResource(className);
             if (Files.exists(resource)) return resource;
@@ -100,11 +105,55 @@ public class LoadingModList {
         return null;
     }
 
-    public ModFileInfo getModFileById(String modid) {
+    public Enumeration<URL> findAllURLsForResource(final String resName) {
+        final String resourceName;
+        // strip a leading slash
+        if (resName.startsWith("/")) {
+            resourceName = resName.substring(1);
+        } else {
+            resourceName = resName;
+        }
+        return new Enumeration<URL>() {
+            private final Iterator<ModFileInfo> modFileIterator = modFiles.iterator();
+            private URL next;
+            @Override
+            public boolean hasMoreElements() {
+                if (next!=null) return true;
+                next = findNextURL();
+                return next != null;
+            }
+
+            @Override
+            public URL nextElement() {
+                if (next == null) {
+                    next = findNextURL();
+                    if (next == null) throw new NoSuchElementException();
+                }
+                URL result = next;
+                next = null;
+                return result;
+            }
+
+            private URL findNextURL() {
+                while (modFileIterator.hasNext()) {
+                    final ModFileInfo next = modFileIterator.next();
+                    final Path resource = next.getFile().findResource(resourceName);
+                    if (Files.exists(resource)) {
+                        return LamdbaExceptionUtils.uncheck(()->new URL("modjar://" + next.getMods().get(0).getModId() + "/" + resourceName));
+                    }
+                }
+                return null;
+            }
+        };
+    }
+
+    public ModFileInfo getModFileById(String modid)
+    {
         return this.fileById.get(modid);
     }
 
-    public List<ModInfo> getMods() {
+    public List<ModInfo> getMods()
+    {
         return this.sortedList;
     }
 

fmlloader/src/main/java/net/minecraftforge/fml/loading/MCPNamingService.java

@@ -36,7 +36,7 @@ public class MCPNamingService implements INameMappingService {
 
     @Override
     public Map.Entry<String, String> understanding() {
-        return Map.entry("srg", "mcp");
+        return Pair.of("srg", "mcp");
     }
 
     @Override
@@ -77,7 +77,7 @@ public class MCPNamingService implements INameMappingService {
     }
 
     private static void loadMappings(final String mappingFileName, BiConsumer<String, String> mapStore) {
-        URL path = MCPNamingService.class.getClassLoader().getResource(mappingFileName);
+        URL path = ClassLoader.getSystemResource(mappingFileName); //We EXPLICITLY go through the SystemClassLoader here because this is dev-time only. And will be on the root classpath.
         if (path == null)
             return;
 

fmlloader/src/main/java/net/minecraftforge/fml/loading/MavenCoordinateResolver.java

@@ -34,7 +34,7 @@ public class MavenCoordinateResolver {
                 (!extension.isEmpty() ? "." + extension : ".jar");
 
         String[] groups = groupId.split("\\.");
-        Path result = Path.of(groups[0]);
+        Path result = Paths.get(groups[0]);
         for (int i = 1; i < groups.length; i++) {
             result = result.resolve(groups[i]);
         }

fmlloader/src/main/java/net/minecraftforge/fml/loading/ModDirTransformerDiscoverer.java

@@ -10,10 +10,7 @@ import cpw.mods.jarhandling.SecureJar;
 import cpw.mods.modlauncher.Launcher;
 import cpw.mods.modlauncher.api.LamdbaExceptionUtils;
 import cpw.mods.modlauncher.api.NamedPath;
-import cpw.mods.modlauncher.api.TypesafeMap;
 import cpw.mods.modlauncher.serviceapi.ITransformerDiscoveryService;
-
-import org.jetbrains.annotations.ApiStatus;
 import org.slf4j.Logger;
 
 import java.io.IOException;
@@ -22,9 +19,10 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.ServiceLoader;
+import java.util.zip.ZipFile;
 import java.util.Set;
 
-@ApiStatus.Internal
 public class ModDirTransformerDiscoverer implements ITransformerDiscoveryService {
     private static final Logger LOGGER = LogUtils.getLogger();
     private static final Set<String> SERVICES = Set.of(
@@ -42,17 +40,6 @@ public class ModDirTransformerDiscoverer implements ITransformerDiscoveryService
 
     @Override
     public void earlyInitialization(final String launchTarget, final String[] arguments) {
-        boolean isMixinEnabledInDev = false;
-        for (String arg : arguments) {
-            if (arg.startsWith("-mixin") || arg.startsWith("--mixin")) {
-                isMixinEnabledInDev = true;
-                break;
-            }
-        }
-        Launcher.INSTANCE.blackboard().putIfAbsent(
-            TypesafeMap.Key.getOrCreate(Launcher.INSTANCE.blackboard(), "isMixinEnabledInDev", Boolean.class),
-            isMixinEnabledInDev
-        );
         ImmediateWindowHandler.load(launchTarget, arguments);
     }
 
@@ -92,15 +79,4 @@ public class ModDirTransformerDiscoverer implements ITransformerDiscoveryService
             .filter(SERVICES::contains)
             .forEach(s -> found.add(new NamedPath(s, path)));
     }
-
-    public static boolean isServiceProvider(Path path) {
-        var jar = SecureJar.from(path);
-
-        for (var providers : jar.moduleDataProvider().descriptor().provides()) {
-            if (SERVICES.contains(providers.service()))
-                return true;
-        }
-
-        return false;
-    }
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/ModJarURLHandler.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) Forge Development LLC and contributors
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.fml.loading;
+
+import com.mojang.logging.LogUtils;
+import cpw.mods.modlauncher.api.LamdbaExceptionUtils;
+import org.slf4j.Logger;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+import java.net.URLStreamHandler;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.jar.Manifest;
+
+import static net.minecraftforge.fml.loading.LogMarkers.CORE;
+
+public class ModJarURLHandler extends URLStreamHandler
+{
+    private static final Logger LOGGER = LogUtils.getLogger();
+    // modjar://modid/path/to/file
+    @Override
+    protected URLConnection openConnection(URL url) {
+        return new ModJarURLConnection(url);
+    }
+
+    @Override
+    protected int hashCode(final URL u) {
+        return Objects.hash(u.getHost(), u.getFile());
+    }
+
+    @Override
+    protected boolean equals(final URL u1, final URL u2) {
+        return Objects.equals(u1.getProtocol(), u2.getProtocol())
+                && Objects.equals(u1.getHost(), u2.getHost())
+                && Objects.equals(u1.getFile(), u2.getFile());
+    }
+
+    static class ModJarURLConnection extends URLConnection {
+        private Path resource;
+        private String modpath;
+        private String modid;
+        private Optional<Manifest> manifest;
+
+        public ModJarURLConnection(final URL url) {
+            super(url);
+        }
+
+        @Override
+        public void connect()
+        {
+//            if (resource == null) {
+//                modid = url.getHost();
+//                // trim first char
+//                modpath = url.getPath().substring(1);
+//                resource = FMLLoader.getLoadingModList().getModFileById(modid).getFile().findResource(modpath);
+//                manifest = FMLLoader.getLoadingModList().getModFileById(modid).getManifest();
+//            }
+        }
+
+        @Override
+        public InputStream getInputStream() throws IOException
+        {
+            connect();
+            LOGGER.trace(CORE, "Loading modjar URL {} got resource {} {}", url, resource, resource != null ? Files.exists(resource) : "missing");
+            return Files.newInputStream(resource);
+        }
+
+        @Override
+        public long getContentLengthLong() {
+            try {
+                connect();
+                return Files.size(resource);
+            } catch (IOException e) {
+                return -1L;
+            }
+        }
+
+        // Used to cache protectiondomains by "top level object" aka the modid
+        @Override
+        public URL getURL() {
+            return LamdbaExceptionUtils.uncheck(()->new URL("modjar://"+modid));
+        }
+
+        public Optional<Manifest> getManifest() {
+            return manifest;
+        }
+    }
+}

fmlloader/src/main/java/net/minecraftforge/fml/loading/ModSorter.java

@@ -8,7 +8,10 @@ package net.minecraftforge.fml.loading;
 import com.google.common.graph.GraphBuilder;
 import com.google.common.graph.MutableGraph;
 import com.mojang.logging.LogUtils;
-import net.minecraftforge.forgespi.language.IModInfo.ModVersion;
+import cpw.mods.jarhandling.SecureJar;
+import net.minecraftforge.fml.loading.moddiscovery.MinecraftLocator;
+import net.minecraftforge.forgespi.language.IModFileInfo;
+import net.minecraftforge.forgespi.language.IModInfo;
 import net.minecraftforge.fml.loading.EarlyLoadingException.ExceptionData;
 import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import net.minecraftforge.fml.loading.moddiscovery.ModFileInfo;
@@ -19,251 +22,238 @@ import org.apache.maven.artifact.versioning.ArtifactVersion;
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
 import org.slf4j.Logger;
 
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.LinkedHashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Function;
+import java.util.jar.Manifest;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import static java.util.stream.Collectors.*;
 import static net.minecraftforge.fml.loading.LogMarkers.LOADING;
 
-public class ModSorter {
+public class ModSorter
+{
     private static final Logger LOGGER = LogUtils.getLogger();
+    private final UniqueModListBuilder uniqueModListBuilder;
+    private List<ModFile> modFiles;
+    private List<ModInfo> sortedList;
+    private Map<String, IModInfo> modIdNameLookup;
+    private List<ModFile> systemMods;
 
-    private record State(List<ModFile> files, List<ModInfo> mods) {}
-
-    private ModSorter() {}
-
-    @SuppressWarnings("removal")
-    public static LoadingModList sort(List<ModFile> mods, final List<ExceptionData> errors) {
-        State systemMods = detectSystemMods(mods);
-        List<ModFile> modFiles;
+    private ModSorter(final List<ModFile> modFiles)
+    {
+        this.uniqueModListBuilder = new UniqueModListBuilder(modFiles);
+    }
 
+    public static LoadingModList sort(List<ModFile> mods, final List<ExceptionData> errors)
+    {
+        final ModSorter ms = new ModSorter(mods);
         try {
-            modFiles = UniqueModListBuilder.buildUniqueList(mods).modFiles();
+            ms.buildUniqueList();
         } catch (EarlyLoadingException e) {
             // We cannot build any list with duped mods. We have to abort immediately and report it
-            // Note this will never actually throw an error because the duplicate checks are done in ModDiscovererer before we get to this phase
-            // So all this is really doing is wasting time.
-            // But i'm leaving it here until I rewrite all of cpw's mod loading code because its such a clusterfuck.
-            return LoadingModList.of(systemMods.files(), systemMods.mods(), e);
+            return LoadingModList.of(ms.systemMods, ms.systemMods.stream().map(mf->(ModInfo)mf.getModInfos().get(0)).collect(toList()), e);
         }
-
-        var named = new HashMap<String, ModInfo>();
-        for (var file : modFiles) {
-            for (var info : file.getModInfos())
-                named.put(info.getModId(), (ModInfo)info);
-        }
-
         // try and validate dependencies
-        final List<ExceptionData> failedList = Stream.concat(verifyDependencyVersions(modFiles).stream(), errors.stream()).toList();
-
+        final List<ExceptionData> failedList = Stream.concat(ms.verifyDependencyVersions().stream(), errors.stream()).toList();
         // if we miss one or the other, we abort now
         if (!failedList.isEmpty()) {
-            return LoadingModList.of(systemMods.files(), systemMods.mods(), new EarlyLoadingException("failure to validate mod list", null, failedList));
+            return LoadingModList.of(ms.systemMods, ms.systemMods.stream().map(mf->(ModInfo)mf.getModInfos().get(0)).collect(toList()), new EarlyLoadingException("failure to validate mod list", null, failedList));
         } else {
             // Otherwise, lets try and sort the modlist and proceed
+            EarlyLoadingException earlyLoadingException = null;
             try {
-                var sorted = sort(modFiles, named);
-                return LoadingModList.of(sorted.files(), sorted.mods(), null);
+                ms.sort();
             } catch (EarlyLoadingException e) {
-                // The only exception that can happen here is a cyclic exception, but fall back to system mods so we can display the nice screen.
-                return LoadingModList.of(systemMods.files(), systemMods.mods(), e);
+                earlyLoadingException = e;
             }
+            return LoadingModList.of(ms.modFiles, ms.sortedList, earlyLoadingException);
         }
     }
 
-    private static State sort(final List<ModFile> modFiles, final Map<String, ModInfo> named) {
-        final MutableGraph<ModInfo> graph = GraphBuilder.directed().build();
+    @SuppressWarnings("UnstableApiUsage")
+    private void sort()
+    {
+        // lambdas are identity based, so sorting them is impossible unless you hold reference to them
+        final MutableGraph<ModFileInfo> graph = GraphBuilder.directed().build();
+        AtomicInteger counter = new AtomicInteger();
+        Map<ModFileInfo, Integer> infos = modFiles.stream()
+                .map(ModFile::getModFileInfo)
+                .filter(ModFileInfo.class::isInstance)
+                .map(ModFileInfo.class::cast)
+                .collect(toMap(Function.identity(), e -> counter.incrementAndGet()));
+        infos.keySet().forEach(graph::addNode);
+        modFiles.stream()
+                .map(ModFile::getModInfos)
+                .<IModInfo>mapMulti(Iterable::forEach)
+                .map(IModInfo::getDependencies)
+                .<IModInfo.ModVersion>mapMulti(Iterable::forEach)
+                .forEach(dep -> addDependency(graph, dep));
 
-        int counter = 0;
-        var infos = new HashMap<ModInfo, Integer>();
-        for (var file : modFiles) {
-            if (file.getModFileInfo() instanceof ModFileInfo info) {
-                for (var imod : info.getMods()) {
-                    var mod = (ModInfo)imod;
-                    infos.put(mod, counter++);
-                    graph.addNode(mod);
-                }
-            }
-        }
-
-        for (var file : modFiles) {
-            for (var info : file.getModInfos()) {
-                for (var dep : info.getDependencies()) {
-                    // Ordering isn't effected by sides, should it be?
-                    //if (!dep.getSide().isCorrectSide())
-                    //    continue;
-
-                    var target = named.get(dep.getModId());
-
-                    // soft dep that doesn't exist. No edge required.
-                    if (target == null)
-                        continue;
-
-                    var self = (ModInfo)dep.getOwner();
-
-                    switch (dep.getOrdering()) {
-                        case BEFORE -> graph.putEdge(self, target);
-                        case AFTER -> graph.putEdge(target, self);
-                        default -> {}
-                    }
-                }
-            }
-        }
-
-        final List<ModInfo> sorted;
-        try {
+        final List<ModFileInfo> sorted;
+        try
+        {
             sorted = TopologicalSort.topologicalSort(graph, Comparator.comparing(infos::get));
-        } catch (CyclePresentException e) {
-            Set<Set<ModInfo>> cycles = e.getCycles();
-            var buf = new StringBuilder();
-            buf.append("Mod Sorting failed - Detected Cycles: \n");
-
-            var dataList = new ArrayList<ExceptionData>();
-            for (var cycle : cycles) {
-                buf.append("\tCycle:\n");
-                for (var mod : cycle) {
-                    var modDeps = new StringBuilder()
-                        .append(mod.getModId())
-                        .append(' ')
-                        .append(mod.getDependencies().stream()
-                            .filter(v -> cycle.stream().anyMatch(m -> m.getModId().equals(v.getModId())))
-                            .map(dep -> dep.getOrdering().name() + " " + dep.getModId())
-                            .collect(Collectors.joining(", "))
-                        );
-                    dataList.add(new ExceptionData("fml.modloading.cycle", modDeps.toString()));
-                    buf.append("\t\tMod: ").append(modDeps.toString()).append('\n');
-                }
+        }
+        catch (CyclePresentException e)
+        {
+            Set<Set<ModFileInfo>> cycles = e.getCycles();
+            if (LOGGER.isErrorEnabled(LOADING))
+            {
+                LOGGER.error(LOADING, "Mod Sorting failed.\nDetected Cycles: {}\n", cycles);
             }
-
-            LOGGER.error(LOADING, buf.toString());
-
+            var dataList = cycles.stream()
+                    .<ModFileInfo>mapMulti(Iterable::forEach)
+                    .<IModInfo>mapMulti((mf,c)->mf.getMods().forEach(c))
+                    .map(IModInfo::getModId)
+                    .map(list -> new ExceptionData("fml.modloading.cycle", list))
+                    .toList();
             throw new EarlyLoadingException("Sorting error", e, dataList);
         }
-
-        var files = new LinkedHashSet<ModFile>();
-        var list = new ArrayList<ModInfo>();
-
-        for (var mod : sorted) {
-            files.add(mod.getOwningFile().getFile());
-            list.add(mod);
-        }
-
-        return new State(files.stream().toList(), list);
+        this.sortedList = sorted.stream()
+                .map(ModFileInfo::getMods)
+                .<IModInfo>mapMulti(Iterable::forEach)
+                .map(ModInfo.class::cast)
+                .collect(toList());
+        this.modFiles = sorted.stream()
+                .map(ModFileInfo::getFile)
+                .collect(toList());
     }
 
-    private static State detectSystemMods(final List<ModFile> modFiles) {
+    @SuppressWarnings("UnstableApiUsage")
+    private void addDependency(MutableGraph<ModFileInfo> topoGraph, IModInfo.ModVersion dep)
+    {
+        final ModFileInfo self = (ModFileInfo)dep.getOwner().getOwningFile();
+        final IModInfo targetModInfo = modIdNameLookup.get(dep.getModId());
+        // soft dep that doesn't exist. Just return. No edge required.
+        if (targetModInfo == null || !(targetModInfo.getOwningFile() instanceof final ModFileInfo target)) return;
+        if (self == target)
+            return; // in case a jar has two mods that have dependencies between
+        switch (dep.getOrdering()) {
+            case BEFORE -> topoGraph.putEdge(self, target);
+            case AFTER -> topoGraph.putEdge(target, self);
+        }
+    }
+
+    private void buildUniqueList()
+    {
+        final UniqueModListBuilder.UniqueModListData uniqueModListData = uniqueModListBuilder.buildUniqueList();
+
+        this.modFiles = uniqueModListData.modFiles();
+
+        detectSystemMods(uniqueModListData.modFilesByFirstId());
+
+        modIdNameLookup = uniqueModListData.modFilesByFirstId().entrySet().stream()
+                .filter(e -> !e.getValue().get(0).getModInfos().isEmpty())
+                .collect(Collectors.toMap(
+                    Map.Entry::getKey,
+                    e -> e.getValue().get(0).getModInfos().get(0)
+                  ));
+    }
+
+    private void detectSystemMods(final Map<String, List<ModFile>> modFilesByFirstId)
+    {
         // Capture system mods (ex. MC, Forge) here, so we can keep them for later
-        var systemMods = List.of("minecraft", "forge");
+        final Set<String> systemMods = new HashSet<>();
+        // The minecraft mod is always a system mod
+        systemMods.add("minecraft");
+        // Find mod file from MinecraftLocator to define the system mods
+        modFiles.stream()
+                .filter(modFile -> modFile.getProvider().getClass() == MinecraftLocator.class)
+                .map(ModFile::getSecureJar)
+                .map(SecureJar::moduleDataProvider)
+                .map(SecureJar.ModuleDataProvider::getManifest)
+                .map(Manifest::getMainAttributes)
+                .map(mf -> mf.getValue("FML-System-Mods"))
+                .filter(Objects::nonNull)
+                .findFirst()
+                .ifPresent(value -> systemMods.addAll(Arrays.asList(value.split(","))));
         LOGGER.debug("Configured system mods: {}", systemMods);
 
-        var mods = new ArrayList<ModInfo>();
-        var files = new ArrayList<ModFile>();
-        for (var systemMod : systemMods) {
-            var mod = findMod(modFiles, systemMod);
-            if (mod == null)
+        this.systemMods = new ArrayList<>();
+        for (String systemMod : systemMods) {
+            var container = modFilesByFirstId.get(systemMod);
+            if (container != null && !container.isEmpty()) {
+                LOGGER.debug("Found system mod: {}", systemMod);
+                this.systemMods.add((ModFile) container.get(0));
+            } else {
                 throw new IllegalStateException("Failed to find system mod: " + systemMod);
-
-            LOGGER.debug("Found system mod: {}", systemMod);
-            mods.add(mod.info());
-            files.add(mod.file());
-        }
-
-        return new State(files, mods);
-    }
-
-    private record ModPair(ModFile file, ModInfo info) {}
-    private static ModPair findMod(final List<ModFile> modFiles, String name) {
-        for (var file : modFiles) {
-            for (var mod : file.getModFileInfo().getMods()) {
-                if (name.equals(mod.getModId()))
-                    return new ModPair(file, (ModInfo)mod);
             }
         }
-        return null;
     }
 
-    private static List<ExceptionData> verifyDependencyVersions(final List<ModFile> files) {
-        final var modVersions = new HashMap<String, ArtifactVersion>();
-        final var modRequirements = new HashSet<ModVersion>();
-        int mandatoryRequired = 0;
+    private List<EarlyLoadingException.ExceptionData> verifyDependencyVersions()
+    {
+        final var modVersions = modFiles.stream()
+                .map(ModFile::getModInfos)
+                .<IModInfo>mapMulti(Iterable::forEach)
+                .collect(toMap(IModInfo::getModId, IModInfo::getVersion));
 
-        for (var file : files) {
-            for (var info : file.getModInfos()) {
-                modVersions.put(info.getModId(), info.getVersion());
-                for (var dep : info.getDependencies()) {
-                    if (dep.getSide().isCorrectSide()) {
-                        if (modRequirements.add(dep) && dep.isMandatory())
-                            mandatoryRequired++;
-                    }
-                }
-            }
-        }
+        final var modVersionDependencies = modFiles.stream()
+                .map(ModFile::getModInfos)
+                .<IModInfo>mapMulti(Iterable::forEach)
+                .collect(groupingBy(Function.identity(), flatMapping(e -> e.getDependencies().stream(), toList())));
 
+        final var modRequirements = modVersionDependencies.values().stream()
+                .<IModInfo.ModVersion>mapMulti(Iterable::forEach)
+                .filter(mv -> mv.getSide().isCorrectSide())
+                .collect(toSet());
+
+        final long mandatoryRequired = modRequirements.stream().filter(IModInfo.ModVersion::isMandatory).count();
         LOGGER.debug(LOADING, "Found {} mod requirements ({} mandatory, {} optional)", modRequirements.size(), mandatoryRequired, modRequirements.size() - mandatoryRequired);
+        final var missingVersions = modRequirements.stream()
+                .filter(mv -> (mv.isMandatory() || modVersions.containsKey(mv.getModId())) && this.modVersionNotContained(mv, modVersions))
+                .collect(toSet());
+        final long mandatoryMissing = missingVersions.stream().filter(IModInfo.ModVersion::isMandatory).count();
+        LOGGER.debug(LOADING, "Found {} mod requirements missing ({} mandatory, {} optional)", missingVersions.size(), mandatoryMissing, missingVersions.size() - mandatoryMissing);
 
-        final var missingMandatory = new HashSet<ModVersion>();
-        final var missingOptional = new HashSet<ModVersion>();
+        if (!missingVersions.isEmpty()) {
+            if (mandatoryMissing > 0) {
+                LOGGER.error(
+                        LOADING,
+                        "Missing or unsupported mandatory dependencies:\n{}",
+                        missingVersions.stream()
+                                .filter(IModInfo.ModVersion::isMandatory)
+                                .map(ver -> formatDependencyError(ver, modVersions))
+                                .collect(Collectors.joining("\n"))
+                );
+            }
+            if (missingVersions.size() - mandatoryMissing > 0) {
+                LOGGER.error(
+                        LOADING,
+                        "Unsupported installed optional dependencies:\n{}",
+                        missingVersions.stream()
+                                .filter(ver -> !ver.isMandatory())
+                                .map(ver -> formatDependencyError(ver, modVersions))
+                                .collect(Collectors.joining("\n"))
+                );
+            }
 
-        for (var dep : modRequirements) {
-            var modId = dep.getModId();
-            var existing = modVersions.get(modId);
-
-            if (!dep.isMandatory() && existing == null)
-                continue;
-
-            var range = dep.getVersionRange();
-            if (existing != null && (range.containsVersion(existing) || "0.0NONE".equals(existing.toString())))
-                continue;
-
-            if (!VersionSupportMatrix.testVersionSupportMatrix(range, modId, "mod"))
-                (dep.isMandatory() ? missingMandatory : missingOptional).add(dep);
+            return missingVersions.stream()
+                    .map(mv -> new ExceptionData(mv.isMandatory() ? "fml.modloading.missingdependency" : "fml.modloading.missingdependency.optional",
+                            mv.getOwner(), mv.getModId(), mv.getOwner().getModId(), mv.getVersionRange(),
+                            modVersions.getOrDefault(mv.getModId(), new DefaultArtifactVersion("null"))))
+                    .toList();
         }
-
-
-        LOGGER.debug(LOADING, "Found {} mod requirements missing ({} mandatory, {} optional)", missingMandatory.size() + missingOptional.size(), missingMandatory.size(), missingOptional.size());
-
-        var ret = new ArrayList<ExceptionData>();
-
-        if (!missingMandatory.isEmpty()) {
-            LOGGER.error(LOADING, "Missing or unsupported mandatory dependencies:\n{}", formatDependencyError(missingMandatory, modVersions));
-            for (var mv : missingMandatory)
-                ret.add(data(mv, modVersions, "fml.modloading.missingdependency"));
-        }
-
-        if (!missingOptional.isEmpty()) {
-            LOGGER.error(LOADING, "Unsupported installed optional dependencies:\n{}", formatDependencyError(missingMandatory, modVersions));
-            for (var mv : missingMandatory)
-                ret.add(data(mv, modVersions, "fml.modloading.missingdependency.optional"));
-        }
-
-        return ret;
+        return Collections.emptyList();
     }
 
-    private static String formatDependencyError(Collection<ModVersion> missing, Map<String, ArtifactVersion> modVersions) {
-        var ret = new ArrayList<String>();
-        for (var dep : missing) {
-            var installed = modVersions.get(dep.getModId());
-            ret.add(String.format(
+    private static String formatDependencyError(IModInfo.ModVersion dependency, Map<String, ArtifactVersion> modVersions)
+    {
+        ArtifactVersion installed = modVersions.get(dependency.getModId());
+        return String.format(
                 "\tMod ID: '%s', Requested by: '%s', Expected range: '%s', Actual version: '%s'",
-                dep.getModId(),
-                dep.getOwner().getModId(),
-                dep.getVersionRange(),
+                dependency.getModId(),
+                dependency.getOwner().getModId(),
+                dependency.getVersionRange(),
                 installed != null ? installed.toString() : "[MISSING]"
-            ));
-        }
-        return String.join("\n", ret);
+        );
     }
 
-    private static final ArtifactVersion NULL_VERSION = new DefaultArtifactVersion("null");
-    private static ExceptionData data(ModVersion mv, Map<String, ArtifactVersion> modVersions, String key) {
-        return new ExceptionData(key, mv.getOwner(), mv.getModId(), mv.getOwner().getModId(), mv.getVersionRange(), modVersions.getOrDefault(mv.getModId(), NULL_VERSION));
+    private boolean modVersionNotContained(final IModInfo.ModVersion mv, final Map<String, ArtifactVersion> modVersions)
+    {
+        return !(VersionSupportMatrix.testVersionSupportMatrix(mv.getVersionRange(), mv.getModId(), "mod", (modId, range) -> modVersions.containsKey(modId) &&
+                (range.containsVersion(modVersions.get(modId)) || modVersions.get(modId).toString().equals("0.0NONE"))));
     }
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/RuntimeDistCleaner.java

@@ -8,8 +8,14 @@ package net.minecraftforge.fml.loading;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.EnumSet;
+import java.util.Iterator;
 import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Consumer;
+import java.util.stream.Collectors;
+
+import com.google.common.collect.Streams;
 import com.mojang.logging.LogUtils;
 import cpw.mods.modlauncher.serviceapi.ILaunchPluginService;
 import net.minecraftforge.api.distmarker.Dist;
@@ -22,232 +28,150 @@ import org.objectweb.asm.Type;
 import org.objectweb.asm.tree.AbstractInsnNode;
 import org.objectweb.asm.tree.AnnotationNode;
 import org.objectweb.asm.tree.ClassNode;
+import org.objectweb.asm.tree.FieldNode;
 import org.objectweb.asm.tree.MethodNode;
 import org.slf4j.Logger;
 import org.slf4j.Marker;
 import org.slf4j.MarkerFactory;
 
-public final class RuntimeDistCleaner implements ILaunchPluginService {
+public class RuntimeDistCleaner implements ILaunchPluginService
+{
     private static final Logger LOGGER = LogUtils.getLogger();
     private static final Marker DISTXFORM = MarkerFactory.getMarker("DISTXFORM");
     private static String DIST;
     private static final String ONLYIN = Type.getDescriptor(OnlyIn.class);
     private static final String ONLYINS = Type.getDescriptor(OnlyIns.class);
-    private static final String MOD = "Lnet/minecraftforge/fml/common/Mod;";
+    @Override
+    public String name()
+    {
+        return "runtimedistcleaner";
+    }
 
     @Override
-    public String name() {
-        return "runtimedistcleaner";
+    public int processClassWithFlags(final Phase phase, final ClassNode classNode, final Type classType, final String reason)
+    {
+        AtomicBoolean changes = new AtomicBoolean();
+        if (remove(classNode.visibleAnnotations, DIST))
+        {
+            LOGGER.error(DISTXFORM, "Attempted to load class {} for invalid dist {}", classNode.name, DIST);
+            throw new RuntimeException("Attempted to load class "+ classNode.name  + " for invalid dist "+ DIST);
+        }
+
+        if (classNode.interfaces != null )
+        {
+            unpack(classNode.visibleAnnotations).stream()
+                .filter(ann->Objects.equals(ann.desc, ONLYIN))
+                .filter(ann->ann.values.indexOf("_interface") != -1)
+                .filter(ann->!Objects.equals(((String[])ann.values.get(ann.values.indexOf("value") + 1))[1], DIST))
+                .map(ann -> ((Type)ann.values.get(ann.values.indexOf("_interface") + 1)).getInternalName())
+                .forEach(intf -> {
+                    if (classNode.interfaces.remove(intf)) {
+                        LOGGER.debug(DISTXFORM,"Removing Interface: {} implements {}", classNode.name, intf);
+                        changes.compareAndSet(false, true);
+                    }
+                });
+
+            //Remove Class level @OnlyIn/@OnlyIns annotations, this is important if anyone gets ambitious and tries to reflect an annotation with _interface set.
+            if (classNode.visibleAnnotations != null) {
+                Iterator<AnnotationNode> itr = classNode.visibleAnnotations.iterator();
+                while (itr.hasNext()) {
+                    AnnotationNode ann = itr.next();
+                    if (Objects.equals(ann.desc, ONLYIN) || Objects.equals(ann.desc, ONLYINS)) {
+                        LOGGER.debug(DISTXFORM,"Removing Class Annotation: {} @{}", classNode.name, ann.desc);
+                        itr.remove();
+                        changes.compareAndSet(false, true);
+                    }
+                }
+            }
+        }
+
+        Iterator<FieldNode> fields = classNode.fields.iterator();
+        while(fields.hasNext())
+        {
+            FieldNode field = fields.next();
+            if (remove(field.visibleAnnotations, DIST))
+            {
+                LOGGER.debug(DISTXFORM,"Removing field: {}.{}", classNode.name, field.name);
+                fields.remove();
+                changes.compareAndSet(false, true);
+            }
+        }
+
+        LambdaGatherer lambdaGatherer = new LambdaGatherer();
+        Iterator<MethodNode> methods = classNode.methods.iterator();
+        while(methods.hasNext())
+        {
+            MethodNode method = methods.next();
+            if (remove(method.visibleAnnotations, DIST))
+            {
+                LOGGER.debug(DISTXFORM,"Removing method: {}.{}{}", classNode.name, method.name, method.desc);
+                methods.remove();
+                lambdaGatherer.accept(method);
+                changes.compareAndSet(false, true);
+            }
+        }
+
+        // remove dynamic synthetic lambda methods that are inside of removed methods
+        for (List<Handle> dynamicLambdaHandles = lambdaGatherer.getDynamicLambdaHandles();
+            !dynamicLambdaHandles.isEmpty(); dynamicLambdaHandles = lambdaGatherer.getDynamicLambdaHandles())
+        {
+            lambdaGatherer = new LambdaGatherer();
+            methods = classNode.methods.iterator();
+            while (methods.hasNext())
+            {
+                MethodNode method = methods.next();
+                if ((method.access & Opcodes.ACC_SYNTHETIC) == 0) continue;
+                for (Handle dynamicLambdaHandle : dynamicLambdaHandles)
+                {
+                    if (method.name.equals(dynamicLambdaHandle.getName()) && method.desc.equals(dynamicLambdaHandle.getDesc()))
+                    {
+                        LOGGER.debug(DISTXFORM,"Removing lambda method: {}.{}{}", classNode.name, method.name, method.desc);
+                        methods.remove();
+                        lambdaGatherer.accept(method);
+                        changes.compareAndSet(false, true);
+                    }
+                }
+            }
+        }
+        return changes.get() ? ComputeFlags.SIMPLE_REWRITE : ComputeFlags.NO_REWRITE;
+    }
+
+    @SuppressWarnings("unchecked")
+    private static List<AnnotationNode> unpack(final List<AnnotationNode> anns) {
+        if (anns == null) return Collections.emptyList();
+        List<AnnotationNode> ret = anns.stream().filter(ann->Objects.equals(ann.desc, ONLYIN)).collect(Collectors.toList());
+        anns.stream().filter(ann->Objects.equals(ann.desc, ONLYINS) && ann.values != null)
+            .map( ann -> (List<AnnotationNode>)ann.values.get(ann.values.indexOf("value") + 1))
+            .filter(v -> v != null)
+            .forEach(v -> v.forEach(ret::add));
+        return ret;
+    }
+
+    private boolean remove(final List<AnnotationNode> anns, final String side)
+    {
+        return unpack(anns).stream().
+                filter(ann->Objects.equals(ann.desc, ONLYIN)).
+                filter(ann->ann.values.indexOf("_interface") == -1).
+                anyMatch(ann -> !Objects.equals(((String[])ann.values.get(ann.values.indexOf("value")+1))[1], side));
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public Consumer<Dist> getExtension()
+    {
+        return (s)-> {
+            DIST = s.name();
+            LOGGER.debug(DISTXFORM, "Configuring for Dist {}", DIST);
+        };
     }
 
     private static final EnumSet<Phase> YAY = EnumSet.of(Phase.AFTER);
     private static final EnumSet<Phase> NAY = EnumSet.noneOf(Phase.class);
 
     @Override
-    public EnumSet<Phase> handlesClass(Type classType, boolean isEmpty) {
-        // TODO: [FML][RuntimeDistCleaner] In 26.1, only return YAY for MC classes on mod dev server
-        if (isEmpty)
-            return NAY;
-
-        String internalName = classType.getInternalName();
-        if (internalName.startsWith("net/minecraftforge/"))
-            return NAY;
-
-        // No Vanilla classes use @OnlyIn(Dist.SERVER), so we can skip them entirely when we're running on a client
-        if (FMLEnvironment.dist.isClient() && isMinecraftClass(internalName))
-            return NAY;
-
-        return YAY;
-    }
-
-    @Override
-    public int processClassWithFlags(final Phase phase, final ClassNode classNode, final Type classType, final String reason) {
-        var changed = false;
-
-        var annotations = unpack(classNode.visibleAnnotations);
-        var isNonMinecraftClass = !isMinecraftClass(classNode.name);
-        final class LazyInit {
-            private LazyInit() {}
-            private static final boolean CAN_EXPLODE = !FMLEnvironment.production && "21.6".equals(FMLLoader.versionInfo().mcVersion());
-        }
-
-        if (remove(annotations, DIST)) {
-            LOGGER.error(DISTXFORM, "Attempted to load class {} for invalid dist {}", classNode.name, DIST);
-            throw new RuntimeException("Attempted to load class " + classNode.name  + " for invalid dist " + DIST);
-        }
-
-        if (!annotations.isEmpty()) {
-            if (isNonMinecraftClass) {
-                if (LazyInit.CAN_EXPLODE)
-                    throw new UnsupportedOperationException("Mod class " + classNode.name + " is annotated with @OnlyIn, this is no longer supported as it slowed down startup times");
-                else
-                    LOGGER.warn(DISTXFORM, "Class {} is annotated with @OnlyIn, this is deprecated and won't work in a future MC release.", classNode.name);
-            }
-
-            if (!FMLEnvironment.production && hasModAnnotation(classNode.visibleAnnotations)) {
-                LOGGER.error(DISTXFORM, "Attempted to load class {} with @Mod and @OnlyIn/@OnlyIns annotations", classNode.name);
-                throw new RuntimeException("Found @OnlyIn on @Mod class " + classNode.name  + " - this is not allowed as it causes crashes. Remove the OnlyIn and consider setting clientSideOnly=true in the root of your mods.toml instead");
-            }
-        }
-
-        if (classNode.interfaces != null && !classNode.interfaces.isEmpty()) {
-            for (var ann : annotations) {
-                if (ann.intf == null || DIST.equals(ann.side))
-                    continue;
-
-                if (classNode.interfaces.remove(ann.intf)) {
-                    LOGGER.debug(DISTXFORM, "Removing Interface: {} implements {}", classNode.name, ann.intf);
-                    changed = true;
-                }
-            }
-
-            //Remove Class level @OnlyIn/@OnlyIns annotations, this is important if anyone gets ambitious and tries to reflect an annotation with _interface set.
-            if (classNode.visibleAnnotations != null) {
-                for (var itr = classNode.visibleAnnotations.iterator(); itr.hasNext(); ) {
-                    var ann = itr.next();
-                    if (ONLYIN.equals(ann.desc) || ONLYINS.equals(ann.desc)) {
-                        LOGGER.debug(DISTXFORM, "Removing Class Annotation: {} @{}", classNode.name, ann.desc);
-                        itr.remove();
-                        changed = true;
-                    }
-                }
-            }
-        }
-
-        for (var itr = classNode.fields.iterator(); itr.hasNext(); ) {
-            var field = itr.next();
-            if (remove(unpack(field.visibleAnnotations), DIST)) {
-                LOGGER.debug(DISTXFORM, "Removing field: {}.{}", classNode.name, field.name);
-                itr.remove();
-                changed = true;
-
-                if (isNonMinecraftClass) {
-                    if (LazyInit.CAN_EXPLODE)
-                        throw new UnsupportedOperationException("Field " + field.name + " in mod class " + classNode.name + " is annotated with @OnlyIn, this is no longer supported as it slowed down startup times");
-                    else
-                        LOGGER.warn(DISTXFORM, "Field {} in class {} is annotated with @OnlyIn, this is deprecated and won't work in a future MC release.", field.name, classNode.name);
-                }
-            }
-        }
-
-        var lambdaGatherer = new LambdaGatherer();
-        for (var itr = classNode.methods.iterator(); itr.hasNext(); ) {
-            var method = itr.next();
-            if (remove(unpack(method.visibleAnnotations), DIST)) {
-                LOGGER.debug(DISTXFORM, "Removing method: {}.{}{}", classNode.name, method.name, method.desc);
-                itr.remove();
-                lambdaGatherer.accept(method);
-                changed = true;
-
-                if (isNonMinecraftClass) {
-                    if (LazyInit.CAN_EXPLODE)
-                        throw new UnsupportedOperationException("Method " + method.name + " in mod class " + classNode.name + " is annotated with @OnlyIn, this is no longer supported as it slowed down startup times");
-                    else
-                        LOGGER.warn(DISTXFORM, "Method {} in class {} is annotated with @OnlyIn, this is deprecated and won't work in a future MC release.", method.name, classNode.name);
-                }
-            }
-        }
-
-        // remove dynamic synthetic lambda methods that are inside of removed methods
-        for (List<Handle> handles = lambdaGatherer.getDynamicLambdaHandles();
-            !handles.isEmpty(); handles = lambdaGatherer.getDynamicLambdaHandles()) {
-            lambdaGatherer = new LambdaGatherer();
-            for (var itr = classNode.methods.iterator(); itr.hasNext(); ) {
-                MethodNode method = itr.next();
-                if ((method.access & Opcodes.ACC_SYNTHETIC) == 0)
-                    continue;
-
-                for (var handle : handles) {
-                    if (method.name.equals(handle.getName()) && method.desc.equals(handle.getDesc())) {
-                        LOGGER.debug(DISTXFORM, "Removing lambda method: {}.{}{}", classNode.name, method.name, method.desc);
-                        itr.remove();
-                        lambdaGatherer.accept(method);
-                        changed = true;
-                    }
-                }
-            }
-        }
-
-        return changed ? ComputeFlags.SIMPLE_REWRITE : ComputeFlags.NO_REWRITE;
-    }
-
-    private record Target(String side, String intf) {
-        static Target from(final AnnotationNode node) {
-            var idx = node.values.indexOf("value");
-            var value = (String[])node.values.get(idx + 1); // Enums are stored as [Type, Value]
-
-            idx = node.values.indexOf("_interface");
-            if (idx == -1)
-                return new Target(value[1], null);
-
-            var intf = (Type)node.values.get(idx + 1);
-            return new Target(value[1], intf.getInternalName());
-        }
-    }
-
-    /**
-     * Unpack any OnlyIn or OnlyIns annotations to Target objects.
-     */
-    @SuppressWarnings("unchecked")
-    private static List<Target> unpack(final List<AnnotationNode> anns) {
-        if (anns == null || anns.isEmpty())
-            return Collections.emptyList();
-
-        var ret = new ArrayList<Target>();
-        for (var node : anns) {
-            if (ONLYIN.equals(node.desc))
-                ret.add(Target.from(node));
-            else if (ONLYINS.equals(node.desc)) {
-                if (node.values == null || node.values.isEmpty())
-                    continue;
-
-                int idx = node.values.indexOf("value");
-                if (idx == -1)
-                    continue;
-
-                var subNodes = (List<AnnotationNode>)node.values.get(idx + 1);
-                if (subNodes != null) {
-                    for (var sub : subNodes)
-                        ret.add(Target.from(sub));
-                }
-            }
-        }
-
-        return ret;
-    }
-
-    private static boolean remove(final List<Target> targets, final String side) {
-        for (var target : targets) {
-            if (target.intf == null && !side.equals(target.side))
-                return true;
-        }
-
-        return false;
-    }
-
-    private static boolean hasModAnnotation(final List<AnnotationNode> anns) {
-        if (anns == null || anns.isEmpty())
-            return false;
-
-        for (var ann : anns) {
-            if (ann.desc.equals(MOD))
-                return true;
-        }
-
-        return false;
-    }
-
-    private static boolean isMinecraftClass(final String internalName) {
-        return internalName.startsWith("net/minecraft/") || internalName.startsWith("com/mojang/");
-    }
-
-    @SuppressWarnings("unchecked")
-    @Override
-    public Consumer<Dist> getExtension() {
-        return s -> {
-            DIST = s.name();
-            LOGGER.debug(DISTXFORM, "Configuring for Dist {}", DIST);
-        };
+    public EnumSet<Phase> handlesClass(Type classType, boolean isEmpty)
+    {
+        return isEmpty ? NAY : YAY;
     }
 
     private static class LambdaGatherer extends MethodVisitor {
@@ -262,21 +186,23 @@ public final class RuntimeDistCleaner implements ILaunchPluginService {
         }
 
         public void accept(MethodNode method) {
-            for (var insn : method.instructions) {
-                if (insn.getType() == AbstractInsnNode.INVOKE_DYNAMIC_INSN)
-                    insn.accept(this);
-            }
+            Streams.stream(method.instructions.iterator()).
+                    filter(insnNode->insnNode.getType() == AbstractInsnNode.INVOKE_DYNAMIC_INSN).
+                    forEach(insnNode->insnNode.accept(this));
         }
 
         @Override
-        public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) {
-            if (META_FACTORY.equals(bsm)) {
-                var handle = (Handle)bsmArgs[1];
-                dynamicLambdaHandles.add(handle);
+        public void visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs)
+        {
+            if (META_FACTORY.equals(bsm))
+            {
+                Handle dynamicLambdaHandle = (Handle) bsmArgs[1];
+                dynamicLambdaHandles.add(dynamicLambdaHandle);
             }
         }
 
-        public List<Handle> getDynamicLambdaHandles() {
+        public List<Handle> getDynamicLambdaHandles()
+        {
             return dynamicLambdaHandles;
         }
     }

fmlloader/src/main/java/net/minecraftforge/fml/loading/StringSubstitutor.java

@@ -5,18 +5,19 @@
 
 package net.minecraftforge.fml.loading;
 
+import com.google.common.collect.ImmutableMap;
 import net.minecraftforge.fml.loading.moddiscovery.ModFile;
-
-import java.util.Map;
-
 import org.apache.commons.lang3.text.StrLookup;
 import org.apache.commons.lang3.text.StrSubstitutor;
 
+import java.util.Map;
+
 @SuppressWarnings("deprecation")
-public class StringSubstitutor {
-    private static final Map<String, String> GLOBALS = Map.of(
-        "mcVersion", FMLLoader.versionInfo().mcVersion(),
-        "forgeVersion", FMLLoader.versionInfo().forgeVersion()
+public class StringSubstitutor
+{
+    private static final Map<String,String> globals = ImmutableMap.of(
+            "mcVersion", FMLLoader.versionInfo().mcVersion(),
+            "forgeVersion", FMLLoader.versionInfo().forgeVersion()
     );
 
     public static String replace(final String in, final ModFile file) {
@@ -24,19 +25,22 @@ public class StringSubstitutor {
     }
 
     private static StrLookup<String> getStringLookup(final ModFile file) {
-        return new StrLookup<>() {
+        return new StrLookup<String>()
+        {
             @Override
-            public String lookup(String key) {
-                var parts = key.split("\\.");
-                if (parts.length == 1)
-                    return key;
-                var pfx = parts[0];
-
+            public String lookup(String key)
+            {
+                final String[] parts = key.split("\\.");
+                if (parts.length == 1) return key;
+                final String pfx = parts[0];
                 if ("global".equals(pfx))
-                    return GLOBALS.get(parts[1]);
+                {
+                    return globals.get(parts[1]);
+                }
                 else if ("file".equals(pfx) && file != null)
+                {
                     return String.valueOf(file.getSubstitutionMap().get().get(parts[1]));
-
+                }
                 return key;
             }
         };

fmlloader/src/main/java/net/minecraftforge/fml/loading/UniqueModListBuilder.java

@@ -9,7 +9,6 @@ import com.mojang.logging.LogUtils;
 import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import net.minecraftforge.forgespi.language.IModInfo;
 import org.apache.maven.artifact.versioning.ArtifactVersion;
-import org.jetbrains.annotations.ApiStatus;
 import org.slf4j.Logger;
 
 import java.util.ArrayList;
@@ -17,19 +16,26 @@ import java.util.Collection;
 import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
 
 import static java.util.stream.Collectors.groupingBy;
 import static java.util.stream.Collectors.joining;
 import static net.minecraftforge.fml.loading.LogMarkers.LOADING;
 
-@ApiStatus.Internal
-@Deprecated(since = "1.21.3", forRemoval = true) // TODO: [FML][Loading] Convert to package private in 1.22
-public final class UniqueModListBuilder {
-    private UniqueModListBuilder() {}
+public class UniqueModListBuilder
+{
+    private final static Logger LOGGER = LogUtils.getLogger();
 
-    private static final Logger LOGGER = LogUtils.getLogger();
+    private final List<ModFile> modFiles;
+
+    public UniqueModListBuilder(final List<ModFile> modFiles) {this.modFiles = modFiles;}
+
+    public UniqueModListData buildUniqueList()
+    {
+        List<ModFile> uniqueModList;
+        List<ModFile> uniqueLibListWithVersion;
 
-    public static UniqueModListData buildUniqueList(List<ModFile> modFiles) {
         // Collect mod files by module name. This will be used for deduping purposes
         final Map<String, List<ModFile>> modFilesByFirstId = modFiles.stream()
                 .filter(mf -> mf.getModFileInfo() != null)
@@ -40,13 +46,13 @@ public final class UniqueModListBuilder {
                 .collect(groupingBy(UniqueModListBuilder::getModId));
 
         // Select the newest by artifact version sorting of non-unique files thus identified
-        final List<ModFile> uniqueModList = modFilesByFirstId.entrySet().stream()
-                .map(UniqueModListBuilder::selectNewestModInfo)
+        uniqueModList = modFilesByFirstId.entrySet().stream()
+                .map(this::selectNewestModInfo)
                 .toList();
 
         // Select the newest by artifact version sorting of non-unique files thus identified
-        final List<ModFile> uniqueLibListWithVersion = libFilesWithVersionByModuleName.entrySet().stream()
-                .map(UniqueModListBuilder::selectNewestModInfo)
+        uniqueLibListWithVersion = libFilesWithVersionByModuleName.entrySet().stream()
+                .map(this::selectNewestModInfo)
                 .toList();
 
         // Transform to the full mod id list
@@ -57,40 +63,43 @@ public final class UniqueModListBuilder {
                 .collect(groupingBy(IModInfo::getModId));
 
         // Transform to the full lib id list
-        final List<List<ModFile>> versionedLibs = uniqueLibListWithVersion.stream()
+        final Map<String, List<ModFile>> versionedLibIds = uniqueLibListWithVersion.stream()
                 .map(UniqueModListBuilder::getModId)
-                .map(libFilesWithVersionByModuleName::get)
-                .toList();
+                .collect(Collectors.toMap(
+                    Function.identity(),
+                    libFilesWithVersionByModuleName::get
+                ));
 
         // Its theoretically possible that some mod has somehow moved an id to a secondary place, thus causing a dupe.
         // We can't handle this
         final List<String> dupedModErrors = modIds.values().stream()
                 .filter(modInfos -> modInfos.size() > 1)
                 .map(mods -> String.format("\tMod ID: '%s' from mod files: %s",
-                        mods.getFirst().getModId(),
+                        mods.get(0).getModId(),
                         mods.stream()
                                 .map(modInfo -> modInfo.getOwningFile().getFile().getFileName()).collect(joining(", "))
                 )).toList();
 
         if (!dupedModErrors.isEmpty()) {
-            LOGGER.error(LOADING, "Found duplicate mods:\n{}", String.join("\n", dupedModErrors));
+            LOGGER.error(LOADING, "Found duplicate mods:\n{}", dupedModErrors.stream().collect(joining("\n")));
             throw new EarlyLoadingException("Duplicate mods found", null, dupedModErrors.stream()
-                    .map(EarlyLoadingException.ExceptionData::new)
+                    .map(s -> new EarlyLoadingException.ExceptionData(s))
                     .toList());
         }
 
 
-        final List<String> dupedLibErrors = versionedLibs.stream()
-                .filter(libModFiles -> libModFiles.size() > 1)
+        final List<String> dupedLibErrors = versionedLibIds.values().stream()
+                .filter(modFiles -> modFiles.size() > 1)
                 .map(mods -> String.format("\tLibrary: '%s' from files: %s",
-                        getModId(mods.getFirst()),
-                        mods.stream().map(ModFile::getFileName).collect(joining(", "))
+                        getModId(mods.get(0)),
+                        mods.stream()
+                                .map(modFile -> modFile.getFileName()).collect(joining(", "))
                 )).toList();
 
         if (!dupedLibErrors.isEmpty()) {
-            LOGGER.error(LOADING, "Found duplicate plugins or libraries:\n{}", String.join("\n", dupedLibErrors));
+            LOGGER.error(LOADING, "Found duplicate plugins or libraries:\n{}", dupedLibErrors.stream().collect(joining("\n")));
             throw new EarlyLoadingException("Duplicate plugins or libraries found", null, dupedLibErrors.stream()
-                    .map(EarlyLoadingException.ExceptionData::new)
+                    .map(s -> new EarlyLoadingException.ExceptionData(s))
                     .toList());
         }
 
@@ -98,28 +107,30 @@ public final class UniqueModListBuilder {
         final Map<String, List<ModFile>> uniqueModFilesByFirstId = uniqueModList.stream()
                 .collect(groupingBy(UniqueModListBuilder::getModId));
 
-        final List<ModFile> loadedList = new ArrayList<>(uniqueModList);
+        final List<ModFile> loadedList = new ArrayList<>();
+        loadedList.addAll(uniqueModList);
         loadedList.addAll(uniqueLibListWithVersion);
 
         return new UniqueModListData(loadedList, uniqueModFilesByFirstId);
     }
 
-    private static ModFile selectNewestModInfo(Map.Entry<String, List<ModFile>> fullList) {
+    private ModFile selectNewestModInfo(Map.Entry<String, List<ModFile>> fullList) {
         List<ModFile> modInfoList = fullList.getValue();
         if (modInfoList.size() > 1) {
             LOGGER.debug("Found {} mods for first modid {}, selecting most recent based on version data", modInfoList.size(), fullList.getKey());
-            modInfoList.sort(Comparator.comparing(UniqueModListBuilder::getVersion).reversed());
-            LOGGER.debug("Selected file {} for modid {} with version {}", modInfoList.getFirst().getFileName(), fullList.getKey(), getVersion(modInfoList.getFirst()));
+            modInfoList.sort(Comparator.comparing(this::getVersion).reversed());
+            LOGGER.debug("Selected file {} for modid {} with version {}", modInfoList.get(0).getFileName(), fullList.getKey(), this.getVersion(modInfoList.get(0)));
         }
-        return modInfoList.getFirst();
+        return modInfoList.get(0);
     }
 
-    private static ArtifactVersion getVersion(final ModFile mf) {
+    private ArtifactVersion getVersion(final ModFile mf)
+    {
         if (mf.getModFileInfo() == null || mf.getModInfos() == null || mf.getModInfos().isEmpty()) {
             return mf.getJarVersion();
         }
 
-        return mf.getModInfos().getFirst().getVersion();
+        return mf.getModInfos().get(0).getVersion();
     }
 
     private static String getModId(ModFile modFile) {
@@ -127,8 +138,9 @@ public final class UniqueModListBuilder {
             return modFile.getSecureJar().name();
         }
 
-        return modFile.getModFileInfo().getMods().getFirst().getModId();
+        return modFile.getModFileInfo().moduleName();
     }
 
     public record UniqueModListData(List<ModFile> modFiles, Map<String, List<ModFile>> modFilesByFirstId) {}
+
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/VersionInfo.java

@@ -5,45 +5,18 @@
 
 package net.minecraftforge.fml.loading;
 
-import java.io.IOException;
-import java.io.InputStreamReader;
+import java.util.Map;
 
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import com.google.gson.JsonSyntaxException;
-
-/** TODO: [FML][Loader] Remove VersionInfo - we shouldn't need to base any decisions on forge or mc version info at the loader level. So once I get a proper replacement i'm gunna kill this. */
 public record VersionInfo(String forgeVersion, String mcVersion, String mcpVersion, String forgeGroup) {
+    VersionInfo(Map<String, ?> arguments) {
+        this((String) arguments.get("forgeVersion"), (String) arguments.get("mcVersion"), (String) arguments.get("mcpVersion"), (String) arguments.get("forgeGroup"));
+    }
+
     public String mcAndForgeVersion() {
-        return mcVersion + "-" + forgeVersion;
+        return mcVersion+"-"+forgeVersion;
     }
 
     public String mcAndMCPVersion() {
         return mcVersion + "-" + mcpVersion;
     }
-
-    /*==========================================================================*
-     *                        INTERNAL SHIT                                     *
-     *==========================================================================*/
-    private static final Gson GSON = new GsonBuilder().create();
-    private static <T> T readJson(String path, Class<T> type) {
-        try (var is = VersionInfo.class.getResourceAsStream(path)) {
-            if (is == null)
-                return null;
-
-            try (var reader = new InputStreamReader(is)) {
-                return GSON.fromJson(reader, type);
-            }
-        } catch (IOException | JsonSyntaxException e) {
-            throw new IllegalStateException("Failed to parse version info from " + path , e);
-        }
-    }
-
-    static VersionInfo detect() {
-        var forge = readJson("/forge_version.json", JSON.class);
-        if (forge == null)
-            throw new IllegalStateException("Failed to find /forge_version.json This is a critical issue");
-        return new VersionInfo(forge.forge(), forge.mc(), forge.mcp(), "net.minecraftforge");
-    }
-    private record JSON(String forge, String mcp, String mc) {}
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/VersionSupportMatrix.java

@@ -5,53 +5,33 @@
 
 package net.minecraftforge.fml.loading;
 
+import net.minecraftforge.forgespi.language.MavenVersionAdapter;
 import org.apache.maven.artifact.versioning.ArtifactVersion;
 import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
 import org.apache.maven.artifact.versioning.VersionRange;
-import org.jetbrains.annotations.ApiStatus;
 
-import java.util.Collections;
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import java.util.function.BiPredicate;
 
-@ApiStatus.Internal // since 1.21.1, will be made non-public in a later MC version
 public class VersionSupportMatrix {
-    private static final Map<String, List<ArtifactVersion>> OVERRIDE_VERSIONS;
-
+    private static final HashMap<String, List<ArtifactVersion>> overrideVersions = new HashMap<>();
     static {
-        if ("1.21.1".equals(FMLLoader.versionInfo().mcVersion())) {
-            OVERRIDE_VERSIONS = Map.ofEntries(
-                    // 1.21.1 is compatible with 1.21
-                    entry("languageloader.javafml", "51"),
-                    entry("mod.minecraft",          "1.21"),
-                    entry("mod.forge",              "51.0.33")
-            );
-        } else {
-            OVERRIDE_VERSIONS = Collections.emptyMap();
+        final ArtifactVersion version = new DefaultArtifactVersion(FMLLoader.versionInfo().mcVersion());
+         if (MavenVersionAdapter.createFromVersionSpec("[1.19.2]").containsVersion(version)) {
+             // 1.19.2 is Compatible with 1.19.1
+             add("languageloader.javafml", "42");
+             add("mod.minecraft",          "1.19.1");
+             add("mod.forge",              "42.0.9");
         }
     }
-
-    /**
-     * @deprecated Use {@link #testVersionSupportMatrix(VersionRange, String, String)} instead, unwrapping your BiPredicate.
-     */
-    @Deprecated(forRemoval = true, since = "1.21.1")
-    public static boolean testVersionSupportMatrix(VersionRange declaredRange, String lookupId, String type, BiPredicate<String, VersionRange> standardLookup) {
+    private static void add(String key, String value) {
+        overrideVersions.computeIfAbsent(key, k -> new ArrayList<>()).add(new DefaultArtifactVersion(value));
+    }
+    public static <T> boolean testVersionSupportMatrix(VersionRange declaredRange, String lookupId, String type, BiPredicate<String, VersionRange> standardLookup) {
         if (standardLookup.test(lookupId, declaredRange)) return true;
-        return testVersionSupportMatrix(declaredRange, lookupId, type);
-    }
-
-    public static boolean testVersionSupportMatrix(VersionRange declaredRange, String lookupId, String type) {
-        if (OVERRIDE_VERSIONS.isEmpty()) return false;
-        List<ArtifactVersion> custom = OVERRIDE_VERSIONS.get(type + "." + lookupId);
-        return custom != null && custom.stream().anyMatch(declaredRange::containsVersion);
-    }
-
-    private static Map.Entry<String, List<ArtifactVersion>> entry(String typeAndLookupId, String declaredRange) {
-        return Map.entry(typeAndLookupId, List.of(new DefaultArtifactVersion(declaredRange)));
-    }
-
-    private static Map.Entry<String, List<ArtifactVersion>> entry(String typeAndLookupId, List<String> declaredRanges) {
-        return Map.entry(typeAndLookupId, declaredRanges.stream().map(DefaultArtifactVersion::new).map(it -> (ArtifactVersion) it).toList());
+        List<ArtifactVersion> custom = overrideVersions.get(type +"." +lookupId);
+        return custom == null ? false  : custom.stream().anyMatch(declaredRange::containsVersion);
     }
 }

fmlloader/src/main/java/net/minecraftforge/fml/loading/log4j/ForgeHighlight.java

@@ -18,7 +18,9 @@ import org.apache.logging.log4j.util.PerformanceSensitive;
 import org.jetbrains.annotations.Nullable;
 
 import java.lang.reflect.Method;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
 
 /**
  * A wrapper for {@link HighlightConverter} that auto-disables ANSI when the terminal doesn't support it.
@@ -47,7 +49,10 @@ public class ForgeHighlight {
             LOGGER.warn("Failed to invoke initializeTerminal on TCA", e);
         }
         if (!TerminalConsoleAppender.isAnsiSupported() && Arrays.stream(options).noneMatch(s -> s.equals("disableAnsi=true"))) {
-            options = new String[] { options[0], "disableAnsi=true" };
+            List<String> optionList = new ArrayList<>();
+            optionList.add(options[0]);
+            optionList.add("disableAnsi=true");
+            options = optionList.toArray(new String[0]);
         }
         return HighlightConverter.newInstance(config, options);
     }