1.20.1 RB 3

https://forums.minecraftforge.net/topic/139825-forge-473-minecraft-1201/

.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: [ '26.2' ]
-
-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

@@ -13,9 +13,6 @@
 /classes
 *.iml
 
-# We however WANT the ide folder as it has tempaltes/configs for developing Forge.
-!ide/**
-
 #gradle
 /build
 /.gradle
@@ -26,6 +23,8 @@
 /projects/mcp/
 /projects/clean/
 /projects/forge/
+/projects/fmlonly/
+#/patches/*
 
 #occupational hazards
 /projects/**/build/
@@ -33,17 +32,18 @@
 /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/
-/fmlcore/logs/

.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", "21", 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", "8.8", 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.
+

buildSrc/build.gradle

@@ -1,14 +1,13 @@
 repositories {
     maven { url = 'https://maven.minecraftforge.net/' }
-    mavenCentral()
+	 mavenCentral()
 }
 
 dependencies {
-    implementation 'org.ow2.asm:asm:9.9.1'
-    implementation 'org.ow2.asm:asm-tree:9.9.1'
-    implementation 'net.minecraftforge:srgutils:0.6.2'
-    implementation 'net.minecraftforge:JarJarMetadata:0.3.27'
-    implementation 'commons-io:commons-io:2.13.0'
+    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:6.7.0.202309050840-r'
-}
+    implementation 'org.eclipse.jgit:org.eclipse.jgit:6.5.0.202303070854-r'
+}

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

@@ -1,67 +0,0 @@
-package net.minecraftforge.forge.tasks
-
-import org.gradle.api.tasks.*
-import org.gradle.api.DefaultTask
-import org.gradle.api.file.ConfigurableFileCollection
-import org.gradle.api.file.RegularFileProperty
-import org.gradle.api.tasks.bundling.AbstractArchiveTask
-
-import java.util.zip.ZipFile
-
-abstract class BundleList extends DefaultTask {
-    @InputFiles abstract ConfigurableFileCollection getConfig()
-    @InputFile abstract RegularFileProperty getServerBundle()
-    @OutputFile abstract RegularFileProperty getOutput()
-
-    BundleList() {
-        config.setFrom(project.configurations.installer)
-        output.convention(project.layout.buildDirectory.file("$name/output.list"))
-        configure {
-            dependsOn(project.tasks.universalJar)
-            inputs.file(project.tasks.universalJar.archiveFile)
-            dependsOn(project.tasks.applyServerBinPatches)
-            inputs.file(project.tasks.applyServerBinPatches.output)
-        }
-    }
-    
-    @TaskAction
-    void run() {
-        def entries = [:] as TreeMap
-        def resolved = project.configurations.installer.resolvedConfiguration.resolvedArtifacts
-        for (def dep : resolved) {
-            def info = Util.getMavenInfoFromDep(dep)
-            //println("$dep.file.sha1\t$info.name\t$info.path")
-            entries.put("$info.art.group:$info.art.name", "$dep.file.sha256\t$info.name\t$info.path")
-        }
-
-        var packed = (AbstractArchiveTask) project.tasks.universalJar
-        var info = Util.getMavenInfoFromTask(packed)
-        def file = packed.archiveFile.get().asFile
-        entries.put("$info.art.group:$info.art.name:$info.art.classifier", "$file.sha256\t$info.name\t$info.path")
-
-        var classifier = 'server'
-        var genned = project.tasks.applyServerBinPatches
-        info = Util.getMavenInfoFromTask(genned, classifier)
-        file = genned.output.get().asFile
-        entries.put("$info.art.group:$info.art.name:$info.art.classifier", "$file.sha256\t$info.name\t$info.path")
-        
-        try (def zip = new ZipFile(serverBundle.get().asFile)) {
-            def entry = zip.getEntry('META-INF/libraries.list')
-            def data = zip.getInputStream(entry).text.split('\n')
-            for (def line : data) {
-                def (sha, artifact, path) = line.split('\t')
-                def (group, name, other) = artifact.split(':', 3)
-                //println("Group: $group Name: $name")
-                def key = "$group:$name"
-                if (other.indexOf(':') != -1){
-                    key += ':' + other.split(':', 2)[1]
-                    //println("\tKey: $key")
-                }
-                if (!entries.containsKey(key))
-                    entries.put(key, line)
-            }
-        }
-        
-        output.get().asFile.text = entries.values().join('\n')
-    }
-}

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

@@ -1,7 +1,6 @@
 package net.minecraftforge.forge.tasks
 
 import groovy.json.JsonBuilder
-import groovy.transform.CompileStatic
 import org.gradle.api.DefaultTask
 import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.tasks.InputFile
@@ -11,7 +10,6 @@ import org.objectweb.asm.tree.ClassNode
 import org.objectweb.asm.tree.FieldNode
 import org.objectweb.asm.tree.MethodNode
 
-@CompileStatic
 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.
@@ -26,13 +24,13 @@ abstract class BytecodeFinder extends DefaultTask {
     protected void exec() {
         Util.init()
 
-        var outputFile = output.get().asFile
+        def outputFile = output.get().asFile
         if (outputFile.exists())
             outputFile.delete()
 
         pre()
 
-        Util.processClassNodes(jar.get().asFile, this.&process)
+        Util.processClassNodes(jar.get().asFile, this::process)
 
         post()
         outputFile.text = new JsonBuilder(getData()).toPrettyString()
@@ -40,8 +38,8 @@ abstract class BytecodeFinder extends DefaultTask {
 
 
     protected process(ClassNode node) {
-        if (node.fields !== null) node.fields.each { process(node, it) }
-        if (node.methods !== null) node.methods.each { process(node, it) }
+        if (node.fields != null) node.fields.each { process(node, it) }
+        if (node.methods != null) node.methods.each { process(node, it) }
     }
 
     protected pre() {}

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

@@ -3,7 +3,6 @@ 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.Opcodes
 import org.objectweb.asm.tree.ClassNode
 import org.objectweb.asm.tree.MethodNode
 
@@ -13,19 +12,13 @@ abstract class BytecodePredicateFinder extends BytecodeFinder {
     @Internal
     abstract Property<Closure<Boolean>> getPredicate()
 
-    private final Map<String, List<String>> matches = new TreeMap<>(Comparator.naturalOrder())
+    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)) {
-                var methods = matches.compute(parent.name, { k, v -> v ?: new ArrayList<>() })
-
-                // only add non-synthetic methods
-                if ((node.access & Opcodes.ACC_SYNTHETIC) == 0) {
-                    methods.add(node.name + node.desc)
-                }
-
+                matches.add(parent.name)
                 return
             }
         }
@@ -34,15 +27,6 @@ abstract class BytecodePredicateFinder extends BytecodeFinder {
     @Internal
     @Override
     protected Object getData() {
-        var array = new ArrayList<Object>()
-        matches.forEach { c, m ->
-            {
-                array.add(
-                        'class': c,
-                        'methods': m
-                )
-            }
-        }
-        return array ?: { throw new RuntimeException('Failed to find any targets, please ensure that method names and descriptors are correct.') }()
+        return matches.stream().sorted().toList() ?: {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/CleanProperties.groovy

@@ -1,97 +0,0 @@
-package net.minecraftforge.forge.tasks;
-
-import groovy.transform.CompileDynamic;
-import groovy.transform.CompileStatic;
-
-import java.util.Properties;
-import java.util.Enumeration;
-import java.util.Map;
-import java.util.TreeSet;
-
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.Reader;
-import java.io.InputStreamReader;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.Writer;
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
-import java.util.Collections;
-import java.util.Set;
-
-/**
- * Eclipse config files are literally just java properties, with the header cleaned up.
- * https://github.com/eclipse/buildship/blob/5b2c7fca7fa86cd74d71b3c099c7b1559eba038e/org.eclipse.buildship.core/src/main/java/org/eclipse/buildship/core/internal/configuration/PreferenceStore.java#L238
- *
- * This does the same thing, as well as sorting alphabetically.
- * It also ignores all comments. We can add them latter if someone cares.
- */
-@CompileStatic
-public class CleanProperties extends Properties {
-    private static final long serialVersionUID = 1L;
-    private static final String LINE_SEP = System.getProperty("line.separator");
-    private static final String UNIX_LINE_SEP = "\n";
-    private static final Charset ENCODING = StandardCharsets.UTF_8;
-
-    public CleanProperties load(File input) throws IOException {
-        if (input.exists()) {
-            try (Reader is = new InputStreamReader(new FileInputStream(input), ENCODING)) {
-                super.load(is);
-            }
-        }
-        return this;
-    }
-
-    public void store(File out) throws IOException {
-        if (!out.getParentFile().exists())
-            out.getParentFile().mkdirs();
-
-        try (OutputStream os = new FileOutputStream(out)) {
-            store(os, null);
-        }
-    }
-
-    @Override
-    public synchronized Enumeration<Object> keys() {
-        Set<Object> ret = new TreeSet<>();
-        for (Enumeration<?> e = super.keys(); e.hasMoreElements();)
-            ret.add(e.nextElement());
-        return Collections.enumeration(ret);
-    }
-
-    @CompileDynamic
-    @Override
-    public Set<Map.Entry<Object, Object>> entrySet() {
-        Set<Map.Entry<Object, Object>> ret = new TreeSet<>((l, r) -> ((String)l.getKey()).compareTo((String)r.getKey()));
-        ret.addAll(super.entrySet());
-        return ret;
-    }
-
-    @Override
-    public void store(OutputStream out, String comments) throws IOException {
-        out.write(clean().getBytes(ENCODING));
-        out.flush();
-    }
-
-    @Override
-    public void store(Writer out, String comments) throws IOException {
-        out.write(clean());
-        out.flush();
-    }
-
-    private String clean() throws IOException {
-        ByteArrayOutputStream tmp = new ByteArrayOutputStream();
-        try {
-            super.store(tmp, null);
-        } finally {
-            tmp.close();
-        }
-
-        String ret = tmp.toString(ENCODING).replace(LINE_SEP, UNIX_LINE_SEP);
-        ret = ret.substring(ret.indexOf(UNIX_LINE_SEP) + 1);
-        return ret;
-    }
-}

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

@@ -1,7 +1,5 @@
 package net.minecraftforge.forge.tasks
 
-import groovy.transform.stc.FirstParam
-
 import java.util.function.BiConsumer
 
 public class ClosureHelper {
@@ -24,7 +22,7 @@ public class ClosureHelper {
         }
     }
     
-    static <T> T apply(T obj, @DelegatesTo(value = FirstParam, strategy = Closure.DELEGATE_FIRST) Closure cl) {
+    static <T> T apply(T obj, Closure cl) {
         cl.delegate = obj
         cl.resolveStrategy = Closure.DELEGATE_FIRST
         cl()

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

@@ -27,7 +27,7 @@ abstract class DownloadLibraries extends DefaultTask {
     def run() {
 		Util.init()
 		File outputDir = output.get().asFile
-        var libraries = new ArrayList<String>()
+        def libraries = new ArrayList()
 
 		def json = input.get().asFile.json().libraries.each { lib ->
 		    //TODO: Thread?
@@ -35,7 +35,7 @@ abstract class DownloadLibraries extends DefaultTask {
 			artifacts.each{ art -> 
 				def target = new File(outputDir, art.path)
 				libraries.add(target.absolutePath)
-				if (!target.exists() || art.sha1 != target.sha1()) {
+				if (!target.exists() || !art.sha1.equals(target.sha1())) {
 					project.logger.lifecycle("Downloading ${art.url}")
 					if (!target.parentFile.exists()) {
 						target.parentFile.mkdirs()
@@ -43,7 +43,7 @@ abstract class DownloadLibraries extends DefaultTask {
 					new URL(art.url).withInputStream { i ->
 						target.withOutputStream { it << i }
 					}
-					if (art.sha1 != target.sha1()) {
+					if (!art.sha1.equals(target.sha1())) {
 						throw new IllegalStateException("Failed to download ${art.url} to ${target.canonicalPath} SHA Mismatch")
 					}
 				}

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

@@ -1,28 +0,0 @@
-package net.minecraftforge.forge.tasks
-
-import groovy.transform.CompileStatic
-import org.gradle.api.DefaultTask
-import org.gradle.api.file.RegularFileProperty
-import org.gradle.api.provider.Property
-import org.gradle.api.tasks.*
-
-import java.util.zip.ZipFile
-
-@CompileStatic
-abstract class ExtractFile extends DefaultTask {
-    @InputFile abstract RegularFileProperty getInput()
-    @Input abstract Property<String> getTarget()
-    @OutputFile abstract RegularFileProperty getOutput()
-
-    @TaskAction
-    protected void exec() {
-        var zip = new ZipFile(input.get().asFile);
-        var entry = zip.getEntry(target.get())
-        if (entry == null)
-            throw new IllegalStateException(input.get().asFile.absolutePath + " does not contain " + target.get())
-        var stream = zip.getInputStream(entry)
-        output.get().asFile.withOutputStream { out ->
-            stream.transferTo(out)
-        }
-    }
-}

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

@@ -1,11 +1,20 @@
 package net.minecraftforge.forge.tasks
 
-import groovy.transform.CompileStatic
 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.tree.AbstractInsnNode
+
+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.*
@@ -25,17 +34,17 @@ abstract class FieldCompareFinder extends BytecodeFinder {
     
     @Override
     protected process(ClassNode parent, MethodNode node) {
-        AbstractInsnNode last = null
+        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)) {
+            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)))) {
+                    if (wanted != null && (original.blacklist == null || (!original.blacklist.contains(instance) && !original.blacklist.contains(parentInstance)))) {
                         targets.computeIfAbsent(wanted, { k -> new TreeSet() }).add(instance)
                     }
                 }
@@ -59,10 +68,9 @@ abstract class FieldCompareFinder extends BytecodeFinder {
 		}
         return ret
     }
-
-    @CompileStatic
+    
     @EqualsAndHashCode(excludes = ['replacement', 'blacklist'])
-    static class Search {
+    public static class Search {
         @Input
         String cls
         
@@ -81,17 +89,17 @@ abstract class FieldCompareFinder extends BytecodeFinder {
             return cls + '.' + name
         }
         
-        def blacklist(String owner, String name, String desc) {
-            if (blacklist === null)
-                blacklist = new HashSet<>()
+        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(String owner) {
+        def blacklist(def owner) {
             blacklist(owner, '', '')
         }
     }
     
-    void fields(Closure cl) {
+    def fields(Closure cl) {
         new ClosureHelper(cl, {name, ccl ->
             def search = ClosureHelper.apply(new Search(), ccl)
             this.fields.put(name, search)

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/InstallerJar.groovy

@@ -1,158 +1,44 @@
 package net.minecraftforge.forge.tasks
 
-import org.gradle.api.file.DuplicatesStrategy
-import org.gradle.api.tasks.bundling.AbstractArchiveTask
 import org.gradle.api.tasks.bundling.Zip
 import org.gradle.api.tasks.*
-import org.gradle.api.DefaultTask
-import org.gradle.api.provider.Property
-import groovy.json.JsonSlurper
+import org.gradle.api.provider.SetProperty
 
 abstract class InstallerJar extends Zip {
-    @Input @Optional abstract Property<Boolean> getFat()
-    @Input @Optional abstract Property<Boolean> getOffline()
+    @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'))
-        fat.convention(false)
-        offline.convention(false)
 
         def installerJson = project.tasks.installerJson
         def launcherJson = project.tasks.launcherJson
         def downloadInstaller = project.tasks.downloadInstaller
 
-        dependsOn(installerJson, launcherJson, downloadInstaller, project.configurations.installer)
+        dependsOn(installerJson, launcherJson, downloadInstaller)
         from(installerJson, launcherJson)
 
         from(project.rootProject.file('/src/main/resources/url.png'))
         project.afterEvaluate {
             from(project.zipTree(downloadInstaller.output)) {
-                duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+                duplicatesStrategy = 'exclude'
             }
-            
-            if (fat.get() || offline.get()) {
-                def cfg = project.tasks.register(name + "Config", Configure)
-                cfg.get().configure {
-                    parent = this
-                    dependsOn(project.tasks.installerJson, project.tasks.launcherJson)
+
+            if (!System.env.TEAMCITY_VERSION) {
+                dependsOn(project.universalJar)
+                from(project.universalJar) {
+                    into '/maven/' + project.group.replace('.', '/') + '/' + project.universalJar.archiveBaseName.get() + '/' + project.version + '/'
                 }
-                dependsOn(cfg)
-            } else {
-                // Things we ALWAYS bundle, this just the server shim jar, because the installer spec only says to extract the file. 
-                // I should make it allow downloads but thats a spec break, and this is just a ~14KB jar
-                [
-                    project.tasks.serverShimJar // Server bootstrap executable jar
-                ].forEach { AbstractArchiveTask packed ->
-                    def path = Util.getMavenInfoFromTask(packed).path
-                    from(packed) {
-                        rename { "maven/$path" }
+
+                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 + '/'
                     }
                 }
             }
         }
     }
-    
-    static abstract class Configure extends DefaultTask {
-        public Zip parent
-        private int count = 0;
-        
-        @TaskAction
-        protected void exec() {
-            def deps = [:] as java.util.TreeMap
-            
-            // Gather all things that need downloading
-            [
-                project.tasks.installerJson, 
-                project.tasks.launcherJson
-            ].each { task ->
-                def json = task.output.get().asFile.json
-                json.libraries.each { lib -> 
-                    if (lib.downloads?.artifact?.url !== null && !lib.downloads.artifact.url.isEmpty())
-                        deps.put(lib.name, lib.downloads.artifact)
-                }
-            }
-            
-            // First find things we build in this project.
-            [
-                project.tasks.universalJar, // Forge runtime code
-                project.tasks.serverShimJar // Shim jar for dedicated server
-            ].forEach { AbstractArchiveTask packed ->
-                def name = Util.getMavenInfoFromTask(packed).name
-                def info = deps.remove(name)
-                if (info !== null) {
-                    println("Adding: $packed.path $name")
-                    parent.from(packed) {
-                        rename { "maven/$info.path" }
-                    }
-                }
-            }
-            
-            // Find any artifacts from the 'installer' config
-            // This config specifies the runtime files we intend for the interaller to have.
-            // And are typically what we would be developing and testing alongside Forge. 
-            // So we may have local modified versions
-            def cfg = project.configurations.installer
-            while (cfg != null) {
-                //println('')
-                def resolved = cfg.resolvedConfiguration.resolvedArtifacts
-                int found = 0
-                for (def dep : resolved) {
-                    def name = Util.getMavenInfoFromDep(dep).name
-                    def info = deps.remove(name)
-                    if (info == null) {
-                        //println("Skipping: $name")
-                        continue
-                    }
-                    //println("-$name")
-                    found++
-                    addFile(dep.file, info)
-                }
-                
-                if (deps.isEmpty()) {
-                    cfg = null
-                    continue
-                }
-                
-                // Prevent infinite loops if something fucky happens
-                if (found == 0)
-                    throw new IllegalStateException("Failed to find any installer dependencies") 
-                
-                def seen = [] as Set
-                cfg = project.configurations.detachedConfiguration()
-                cfg.transitive = false
-                for (def key : deps.keySet()) {
-                    def (group, artifact, other) = key.split(':', 3)
-                    // Only resolve unique group:artifact so we don't get version overrides
-                    if (seen.add(group + ':' + artifact)) {
-                        //println("+$key")
-                        cfg.dependencies.add(project.dependencies.create(key))
-                    }
-                }
-            }
-        }
-        
-        void addFile(file, info) {
-            boolean pack = parent.offline.get() || info.url.isEmpty()
-            
-            // If it's a offline jar just always pack
-            if (!pack) {
-                try {
-                    var remote = new URL("${info.url}.sha1").getText('UTF-8')
-                    pack = info.sha1 != remote
-                } catch (FileNotFoundException e) {
-                    pack = !info.url.startsWith('https://libraries.minecraft.net/')
-                    // Oh noes its not there!
-                }
-            }
-            
-            if (pack) {
-                println("Adding: $file.absolutePath")
-                parent.from(file) {
-                    rename { "maven/$info.path" }
-                }
-            }
-        }
-    }
 }

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

@@ -7,13 +7,13 @@ import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.provider.Property
 import org.gradle.api.provider.SetProperty
 import org.gradle.api.tasks.*
-import org.gradle.api.tasks.bundling.AbstractArchiveTask
 
 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()
@@ -23,19 +23,29 @@ abstract class InstallerJson extends DefaultTask {
     @Input abstract Property<String> getWelcome()
 
     InstallerJson() {
-        launcherJsonName.convention('/version.json')
-        logo.convention('/big_logo.png')
-        mirrors.convention('https://files.minecraftforge.net/mirrors-2.0.json')
-        welcome.convention("Welcome to the ${project.name.capitalize()} installer.")
-        output.convention(project.layout.buildDirectory.file('libs/install_profile.json'))
+        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 {
-            [
-                project.tasks.universalJar,
-                project.tasks.serverShimJar
-            ].forEach { packed ->
-                dependsOn(packed)
-                input.from packed.archiveFile
+            (packedDependencies.get().collect{ project.rootProject.tasks.findByPath(it) } + [project.universalJar]).forEach {
+                dependsOn(it)
+                input.from it.archiveFile
             }
         }
     }
@@ -43,19 +53,17 @@ abstract class InstallerJson extends DefaultTask {
     @TaskAction
     protected void exec() {
         def libs = libraries
-        [
-            project.tasks.universalJar,
-            project.tasks.serverShimJar
-        ].forEach { AbstractArchiveTask packed ->
-            def info = Util.getMavenInfoFromTask(packed)
-            libs.put(info.name, [
-                name: info.name,
+        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: info.path,
-                        url: "https://maven.minecraftforge.net/$info.path",
-                        sha1: packed.archiveFile.get().asFile.sha1(),
-                        size: packed.archiveFile.get().asFile.length()
+                        path: path,
+                        url: "https://maven.minecraftforge.net/${path}",
+                        sha1: child.archiveFile.get().asFile.sha1(),
+                        size: child.archiveFile.get().asFile.length()
                     ]
                 ]
             ])

buildSrc/src/main/groovy/net/minecraftforge/forge/tasks/JarJarMetadataOptions.java

@@ -1,415 +0,0 @@
-/*
- * Copyright (c) Forge Development LLC and contributors
- * SPDX-License-Identifier: LGPL-2.1-only
- */
-
-package net.minecraftforge.forge.tasks;
-
-import com.google.common.reflect.TypeToken;
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
-import net.minecraftforge.jarjar.metadata.ContainedJarIdentifier;
-import net.minecraftforge.jarjar.metadata.ContainedJarMetadata;
-import net.minecraftforge.jarjar.metadata.ContainedVersion;
-import net.minecraftforge.jarjar.metadata.Metadata;
-import net.minecraftforge.jarjar.metadata.MetadataIOHandler;
-import net.minecraftforge.jarjar.metadata.json.ArtifactVersionSerializer;
-import net.minecraftforge.jarjar.metadata.json.ContainedJarIdentifierSerializer;
-import net.minecraftforge.jarjar.metadata.json.ContainedJarMetadataSerializer;
-import net.minecraftforge.jarjar.metadata.json.ContainedVersionSerializer;
-import net.minecraftforge.jarjar.metadata.json.MetadataSerializer;
-import net.minecraftforge.jarjar.metadata.json.VersionRangeSerializer;
-import org.apache.maven.artifact.versioning.ArtifactVersion;
-import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
-import org.apache.maven.artifact.versioning.InvalidVersionSpecificationException;
-import org.apache.maven.artifact.versioning.VersionRange;
-import org.codehaus.groovy.runtime.InvokerHelper;
-import org.gradle.api.Action;
-import org.gradle.api.DefaultTask;
-import org.gradle.api.artifacts.ConfigurationContainer;
-import org.gradle.api.artifacts.Dependency;
-import org.gradle.api.artifacts.ExternalModuleDependency;
-import org.gradle.api.artifacts.FileCollectionDependency;
-import org.gradle.api.artifacts.MinimalExternalModuleDependency;
-import org.gradle.api.artifacts.ModuleDependency;
-import org.gradle.api.artifacts.ModuleIdentifier;
-import org.gradle.api.artifacts.ModuleVersionIdentifier;
-import org.gradle.api.artifacts.ResolvedArtifact;
-import org.gradle.api.file.ProjectLayout;
-import org.gradle.api.file.RegularFileProperty;
-import org.gradle.api.provider.Provider;
-import org.gradle.api.provider.SetProperty;
-import org.gradle.api.tasks.Input;
-import org.gradle.api.tasks.OutputFile;
-import org.gradle.api.tasks.TaskAction;
-
-import javax.inject.Inject;
-import java.io.File;
-import java.io.IOException;
-import java.io.Serial;
-import java.io.Serializable;
-import java.nio.file.Files;
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Objects;
-import java.util.Set;
-import java.util.zip.ZipFile;
-
-// TODO SUPER SUPER SUPER UGLY, CLEAN UP IN FORGEDEV 7
-@Deprecated(forRemoval = true) // Will be moved to JarJar plugin in ForgeDev 7
-public abstract class JarJarMetadataOptions extends DefaultTask {
-    private static final Gson GSON = new GsonBuilder()
-        .registerTypeAdapter(VersionRange.class, new VersionRangeSerializer())
-        .registerTypeAdapter(ArtifactVersion.class, new ArtifactVersionSerializer())
-        .registerTypeAdapter(DefaultArtifactVersion.class, new ArtifactVersionSerializer())
-        .registerTypeAdapter(ContainedJarIdentifier.class, new ContainedJarIdentifierSerializer())
-        .registerTypeAdapter(ContainedJarMetadata.class, new ContainedJarMetadataSerializer())
-        .registerTypeAdapter(ContainedVersion.class, new ContainedVersionSerializer())
-        .registerTypeAdapter(Metadata.class, new MetadataSerializer())
-        .setPrettyPrinting()
-        .create();
-
-    protected abstract @Input SetProperty<ResolvedDependencyInfoImpl> getResolvedDependencies();
-
-    protected abstract @OutputFile RegularFileProperty getMetadataFile();
-
-    protected abstract @Inject ProjectLayout getLayout();
-
-    // NOTE: I'm not adding a non-provider version. please just use the version catalog entries for now.
-    public void add(Provider<MinimalExternalModuleDependency> dependency, Action<? super ResolvedDependencyInfo> action) {
-        this.getResolvedDependencies().add(dependency.map(d -> {
-            var ret = ResolvedDependencyInfoImpl.from(this.getProject().getConfigurations(), d);
-            action.execute(ret);
-            return ret;
-        }));
-    }
-
-    @Inject
-    public JarJarMetadataOptions() {
-        this.getMetadataFile().convention(this.getLayout().getBuildDirectory().file(this.getName() + "/options.json"));
-    }
-
-    @TaskAction
-    protected void exec() {
-        record ForgeLocaterOptions(String resource, String layer, String id, List<ContainedJarMetadata> deps, ContainedJarMetadata meta, boolean nested) { }
-
-        var resolved = this.getResolvedDependencies().get();
-        var jars = new ArrayList<ForgeLocaterOptions>(resolved.size());
-        for (var dependency : resolved) {
-            var deps = new ArrayList<ContainedJarMetadata>();
-            try (var zip = new ZipFile(dependency.artifact)) {
-                var entry = zip.getEntry("META-INF/jarjar/metadata.json");
-                if (entry != null) {
-                    try (var stream = zip.getInputStream(entry)) {
-                        var meta = MetadataIOHandler.fromStream(stream).orElse(null);
-                        if (meta == null)
-                            throw new IllegalStateException("Corrupt metadata.json in " + dependency.artifact.getAbsolutePath());
-                        for (var dep : meta.jars())
-                            deps.add(new ContainedJarMetadata(dep.identifier(), dep.version(), "", dep.isObfuscated()));
-                    }
-                }
-            } catch (IOException e) {
-                throw new RuntimeException(e);
-            }
-            jars.add(new ForgeLocaterOptions(
-                dependency.resource,
-                dependency.layer,
-                dependency.identifier,
-                deps,
-                new ContainedJarMetadata(
-                    new ContainedJarIdentifier(validateGroup(dependency), dependency.module.getName()),
-                    new ContainedVersion(null, parseVersion(dependency)),
-                    Objects.requireNonNull(dependency.path, "Dependency path is unspecified: " + dependency.asString),
-                    false
-                ),
-                dependency.nested
-            ));
-        }
-
-        try {
-            record Meta(List<ForgeLocaterOptions> options){}
-
-            Files.writeString(
-                this.getMetadataFile().getAsFile().get().toPath(),
-                GSON.toJson(new Meta(jars), Meta.class)
-            );
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    private String validateGroup(ResolvedDependencyInfoImpl dependency) {
-        try {
-            return Objects.requireNonNull(dependency.module.getGroup());
-        } catch (NullPointerException e) {
-            throw new IllegalArgumentException("Module dependency has no group: " + dependency.asString, e);
-        }
-    }
-
-    private ArtifactVersion parseVersion(ResolvedDependencyInfoImpl resolved) {
-        try {
-            return VersionRange.createFromVersionSpec(Objects.requireNonNull(resolved.version)).getRecommendedVersion();
-        } catch (InvalidVersionSpecificationException e) {
-            throw new IllegalArgumentException("Version is invalid for: " + resolved.asString, e);
-        } catch (NullPointerException e) {
-            throw new IllegalArgumentException("Version is unspecified for: " + resolved.asString, e);
-        }
-    }
-
-    private VersionRange parseVersionRange(ResolvedDependencyInfoImpl dependency) {
-        if (dependency.hasManuallySpecifiedRange) {
-            try {
-                return VersionRange.createFromVersionSpec(dependency.versionRange);
-            } catch (InvalidVersionSpecificationException e) {
-                throw new IllegalArgumentException("Version is invalid for: " + dependency.asString, e);
-            }
-        } else {
-            try {
-                return VersionRange.createFromVersionSpec("[%s,)".formatted(Objects.requireNonNull(dependency.versionRange)));
-            } catch (InvalidVersionSpecificationException e) {
-                throw new IllegalArgumentException("Version range is invalid for: " + dependency.asString, e);
-            } catch (NullPointerException e) {
-                throw new IllegalArgumentException("Version is unspecified for: " + dependency.asString, e);
-            }
-        }
-    }
-
-    public interface ResolvedDependencyInfo {
-        void containedJarMetadata(Action<? super ContainedJarMetadataInfo> action);
-
-        void setResource(String resource);
-
-        void setLayer(String layer);
-
-        void setId(String identifier);
-
-        void setNested(boolean nested);
-
-        interface ContainedJarMetadataInfo {
-            void setGroup(String group);
-
-            void setName(String name);
-
-            void setPath(String version);
-        }
-    }
-
-    static final class ResolvedDependencyInfoImpl implements ResolvedDependencyInfo, ResolvedDependencyInfo.ContainedJarMetadataInfo, Serializable {
-        private static final @Serial long serialVersionUID = -7577318115877822993L;
-
-        final MinimalModuleVersionIdentifier module;
-        final String version;
-        String versionRange;
-        boolean hasManuallySpecifiedRange;
-        boolean nested;
-        final File artifact;
-        String path;
-        String resource;
-        String layer;
-        String identifier;
-        final String asString;
-
-        public ResolvedDependencyInfoImpl(MinimalModuleVersionIdentifier module, String version, File artifact, String asString) {
-            this.module = module;
-            this.version = version;
-            this.artifact = artifact;
-            this.asString = asString;
-        }
-
-        @Override
-        public void containedJarMetadata(Action<? super ContainedJarMetadataInfo> action) {
-            action.execute(this);
-        }
-
-        @Override
-        public void setGroup(String group) {
-            this.module.group = group;
-        }
-
-        @Override
-        public void setName(String name) {
-            this.module.name = name;
-        }
-
-        @Override
-        public void setPath(String path) {
-            this.path = path;
-        }
-
-        @Override
-        public void setResource(String resource) {
-            this.resource = resource;
-        }
-
-        @Override
-        public void setLayer(String layer) {
-            this.layer = layer;
-        }
-
-        @Override
-        public void setId(String identifier) {
-            this.identifier = identifier;
-        }
-
-        @Override
-		public void setNested(boolean nested) {
-			this.nested = nested;
-		}
-
-        static Set<File> getFiles(Set<ResolvedDependencyInfoImpl> resolvedDependencies) {
-            var ret = new HashSet<File>(resolvedDependencies.size());
-            for (var dependency : resolvedDependencies) {
-                ret.add(dependency.artifact);
-            }
-            return ret;
-        }
-
-        static ResolvedDependencyInfoImpl from(ConfigurationContainer configurations, Dependency dependency) {
-            var group = dependency.getGroup();
-            var name = dependency.getName();
-            var version = dependency.getVersion();
-
-            if (dependency instanceof FileCollectionDependency filesDependency) {
-                File artifact;
-                try {
-                    artifact = filesDependency.getFiles().getSingleFile();
-                } catch (IllegalStateException e) {
-                    // TODO fileCollectionDependencyIsNotSingleFile
-                    throw e;
-                }
-
-                return new ResolvedDependencyInfoImpl(
-                    new MinimalModuleVersionIdentifier(group, name, version),
-                    version,
-                    artifact,
-                    filesDependency.toString()
-                );
-            } else if (dependency instanceof ModuleDependency moduleDependency) {
-                moduleDependency = moduleDependency.copy();
-                if (moduleDependency instanceof ExternalModuleDependency externalModuleDependency) {
-                    externalModuleDependency.version(v -> v.strictly(version.toString()));
-                }
-
-                var detachedConfiguration = configurations.detachedConfiguration(moduleDependency);
-                detachedConfiguration.setTransitive(false);
-
-                ResolvedDependencyInfoImpl ret = null;
-                for (var artifact : detachedConfiguration.getResolvedConfiguration().getFirstLevelModuleDependencies().iterator().next().getModuleArtifacts()) {
-                    var fileName = getFileName(artifact);
-                    if (!fileName.endsWith(".jar"))
-                        continue;
-
-                    if (ret != null)
-                        throw new IllegalArgumentException("Module dependency has too many Jar artifacts: " + moduleDependency);
-
-                    ret = new ResolvedDependencyInfoImpl(
-                        new MinimalModuleVersionIdentifier(group, name, artifact.getModuleVersion().getId().getVersion()),
-                        version,
-                        artifact.getFile(),
-                        moduleDependency.toString()
-                    );
-                }
-                if (ret == null)
-                    throw new IllegalArgumentException("Module dependency has no Jar artifacts: " + moduleDependency);
-
-                return ret;
-            } else {
-                throw new IllegalArgumentException("Unsupported dependency type: " + dependency.getClass().getName() + " -- " + dependency);
-            }
-        }
-
-        private static String getFileName(ResolvedArtifact artifact) {
-            try {
-                return InvokerHelper.getProperty(artifact.getId(), "fileName").toString();
-            } catch (Throwable e) {
-                // NOTE: Why not just use this to begin with?
-                // ComponentArtifactIdentifier can have a getFileName() method, which doesn't necessarily resolve the file itself.
-                // This allows us to get the name of the file to be used without asking Gradle to download the file.
-                // So, if a file is not a JAR file, we can check the name without actually downloading it.
-                return artifact.getFile().getName();
-            }
-        }
-
-        @Override
-        public boolean equals(Object obj) {
-            if (obj == this) return true;
-            if (obj == null || obj.getClass() != this.getClass()) return false;
-            var that = (ResolvedDependencyInfoImpl) obj;
-            return Objects.equals(this.module, that.module) &&
-                Objects.equals(this.version, that.version) &&
-                Objects.equals(this.versionRange, that.versionRange) &&
-                Objects.equals(this.artifact, that.artifact);
-        }
-
-        @Override
-        public int hashCode() {
-            return Objects.hash(module, version, versionRange, artifact);
-        }
-
-        @Override
-        public String toString() {
-            return "ResolvedDependencyInfo[" +
-                "module=" + module + ", " +
-                "fixedVersion=" + version + ", " +
-                "versionRange=" + versionRange + ", " +
-                "artifact=" + artifact + ']';
-        }
-
-        static final class MinimalModuleVersionIdentifier implements ModuleIdentifier, ModuleVersionIdentifier {
-            private static final @Serial long serialVersionUID = -955346236759069739L;
-
-            private String group;
-            private String name;
-            private final String version;
-
-            @Inject
-            public MinimalModuleVersionIdentifier(String group, String name, String version) {
-                this.group = group;
-                this.name = name;
-                this.version = version;
-            }
-
-            @Override
-            public ModuleIdentifier getModule() {
-                return this;
-            }
-
-            @Override
-            public String getGroup() {
-                return this.group;
-            }
-
-            @Override
-            public String getName() {
-                return this.name;
-            }
-
-            @Override
-            public String getVersion() {
-                return this.version;
-            }
-
-            @Override
-            public boolean equals(Object obj) {
-                return this == obj || obj instanceof MinimalModuleVersionIdentifier o
-                    && Objects.equals(this.group, o.group)
-                    && Objects.equals(this.name, o.name)
-                    && Objects.equals(this.version, o.version);
-            }
-
-            @Override
-            public int hashCode() {
-                return Objects.hash(group, name, version);
-            }
-
-            @Override
-            public String toString() {
-                return "MinimalModuleVersionIdentifier[" +
-                    "group=" + group + ", " +
-                    "name=" + name + ", " +
-                    "version=" + version + ']';
-            }
-        }
-    }
-}

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

@@ -6,7 +6,6 @@ import org.gradle.api.file.ConfigurableFileCollection
 import org.gradle.api.file.RegularFileProperty
 import org.gradle.api.provider.SetProperty
 import org.gradle.api.tasks.*
-import org.gradle.api.tasks.bundling.AbstractArchiveTask
 
 import java.nio.file.Files
 
@@ -17,78 +16,59 @@ 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() {
-        output.convention(project.layout.buildDirectory.file('libs/version.json'))
+        getOutput().convention(project.layout.buildDirectory.file('version.json'))
 
-        dependsOn(project.tasks.universalJar)
-        input.from(project.tasks.universalJar.archiveFile)
-        input.from(project.configurations.installer)
-        configure {
-            def mc    = project.rootProject.ext.MC_VERSION
-            def forge = project.rootProject.ext.FORGE_VERSION
-            def timestamp = iso8601Now()
-            json.putAll([
-                _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/"
-                ],
-                id: "$mc-$project.name-$forge",
-                time: timestamp,
-                releaseTime: timestamp,
-                inheritsFrom: mc,
-                type: 'release',
-                logging: [:],
-                mainClass: '',
-                libraries: []
-            ] as LinkedHashMap)
-            
-            [
-                project.tasks.universalJar
-            ].forEach { packed ->
-                dependsOn(packed)
-                input.from packed.archiveFile
+        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
             }
-            
-            def patched = project.tasks.applyClientBinPatches
-            dependsOn(patched)
-            input.from patched.output
         }
     }
 
     @TaskAction
     protected void exec() {
-        var packed = (AbstractArchiveTask) project.tasks.universalJar
-        def info = Util.getMavenInfoFromTask(packed)
-        json.libraries.add([
-            name: info.name,
-            downloads: [
-                artifact: [
-                    path: info.path,
-                    url: "https://maven.minecraftforge.net/$info.path",
-                    sha1: packed.archiveFile.get().asFile.sha1(),
-                    size: packed.archiveFile.get().asFile.length()
+        if (!json.libraries)
+            json.libraries = []
+        def libs = [:]
+        getArtifacts(project, project.configurations.installer, false).each { key, lib -> libs[key] = lib }
+        getArtifacts(project, project.configurations.moduleonly, false).each { key, lib -> libs[key] = lib }
+
+        packedDependencies.get().collect{ project.rootProject.tasks.findByPath(it) }.forEach {
+            def path = Util.getMavenPath(it)
+            def key = Util.getMavenDep(it)
+            
+            libs[key] = [
+                name: key,
+                downloads: [
+                    artifact: [
+                        path: path,
+                        url: "https://maven.minecraftforge.net/${path}",
+                        sha1: it.archiveFile.get().asFile.sha1(),
+                        size: it.archiveFile.get().asFile.length()
+                    ]
                 ]
             ]
-        ])
-
-        var classifier = 'client'
-        var genned = project.tasks.applyClientBinPatches
-        info = Util.getMavenInfoFromTask(genned, classifier)
-        json.libraries.add([
-            name: info.name,
-            downloads: [
-                artifact: [
-                    path: info.path,
-                    url: "",
-                    sha1: genned.output.get().asFile.sha1(),
-                    size: genned.output.get().asFile.length()
-                ]
-            ]
-        ])
-
-        json.libraries.addAll(getArtifacts(project.configurations.installer).values())
+        }
+        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

@@ -1,6 +1,5 @@
 package net.minecraftforge.forge.tasks
 
-import groovy.transform.CompileStatic
 import org.apache.commons.io.IOUtils
 import org.gradle.api.DefaultTask
 import org.gradle.api.file.ConfigurableFileCollection
@@ -13,7 +12,6 @@ import java.util.zip.ZipEntry
 import java.util.zip.ZipInputStream
 import java.util.zip.ZipOutputStream
 
-@CompileStatic
 abstract class MergeJars extends DefaultTask {
     MergeJars() {
         output.convention(project.layout.buildDirectory.dir(name).map { it.file('output.jar') })
@@ -26,8 +24,8 @@ abstract class MergeJars extends DefaultTask {
         try (ZipOutputStream zout = new ZipOutputStream(new FileOutputStream(output.get().asFile))) {
             for (def jar : jars) {
                 try (ZipInputStream zin = new ZipInputStream(new FileInputStream(jar))) {
-                    ZipEntry entry
-                    while ((entry = zin.getNextEntry()) !== null) {
+                    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)

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

@@ -27,6 +27,6 @@ public class ObjectTarget implements Comparable<ObjectTarget> {
     
     @Override
     int compareTo(ObjectTarget o) {
-        return toString() <=> o.toString()
+        return toString().compareTo(o.toString())
     }
 }

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

@@ -16,7 +16,7 @@ abstract class SetupCheckJarCompatibility extends DefaultTask {
     SetupCheckJarCompatibility() {
         group = 'jar compatibility'
         onlyIf {
-            inputVersion.getOrNull() !== null
+            inputVersion.getOrNull() != null
         }
         outputs.upToDateWhen { false } // Never up to date, because this setup task should always run
 
@@ -26,6 +26,16 @@ abstract class SetupCheckJarCompatibility extends DefaultTask {
     @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 {

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

@@ -2,224 +2,159 @@ package net.minecraftforge.forge.tasks
 
 import groovy.json.JsonBuilder
 import groovy.json.JsonSlurper
-import groovy.transform.CompileStatic
-import groovy.transform.stc.ClosureParams
-import groovy.transform.stc.SimpleType
-import org.gradle.api.Project
-import org.gradle.api.Task
-import org.gradle.api.artifacts.Configuration
-import org.gradle.api.artifacts.ResolvedArtifact
-import org.gradle.api.tasks.bundling.AbstractArchiveTask
 import org.objectweb.asm.ClassReader
 import org.objectweb.asm.Opcodes
 import org.objectweb.asm.tree.ClassNode
 
-import java.net.http.HttpClient
-import java.net.http.HttpRequest
-import java.net.http.HttpResponse
+import java.io.File
 import java.security.MessageDigest
 import java.text.SimpleDateFormat
-import java.util.concurrent.ConcurrentHashMap
-import java.util.concurrent.Semaphore
+import java.util.Date
 import java.util.zip.ZipEntry
 import java.util.zip.ZipInputStream
 
-final class Util {
-    public static final int ASM_LEVEL = Opcodes.ASM9
-    private static final HttpClient HTTP = HttpClient.newBuilder().build()
+public class Util {
+    static final ASM_LEVEL = Opcodes.ASM9
 
-    static void init() {
-        File.metaClass.sha1 = { ->
-            MessageDigest md = MessageDigest.getInstance('SHA-1')
-            delegate.eachByte(4096) { byte[] bytes, int size ->
-                md.update(bytes, 0, size)
-            }
-            return md.digest().collect(this.&toHex).join('')
-        }
+	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.sha256 = { ->
-            MessageDigest md = MessageDigest.getInstance('SHA-256')
-            delegate.eachByte(4096) { byte[] bytes, int size ->
-                md.update(bytes, 0, size)
-            }
-            return md.digest().collect(this.&toHex).join('')
-        }
-        File.metaClass.getSha256 = { !delegate.exists() ? null : delegate.sha256() }
 
-        File.metaClass.json = { -> new JsonSlurper().parseText(delegate.text) }
+		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 = { ->
-            var format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ")
-            var result = format.format(delegate)
-            return result[0..21] + ':' + result[22..-1]
-        }
+		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 ->
-            var lst = new ArrayList<String>()
-            int x = 0
-            int idx
-            String tmp = delegate
-            while ((idx = tmp.lastIndexOf(del)) != -1 && (limit === -1 || x++ < limit)) {
+            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'
     }
 
-    static String[] getClasspath(Project project, Map libs, String 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 getMavenDep(task) {
+        def classifier = task.archiveClassifier.get()
+        return "${task.project.group}:${task.project.name}:${task.project.version}" + (classifier == '' ? '' : ':' + classifier)
     }
 
-    @CompileStatic
-    static Map getArtifacts(Configuration config) {
-        var ret = [:]
-        var semaphore = new Semaphore(1, true)
-        config.resolvedConfiguration.resolvedArtifacts.parallelStream().forEachOrdered(dep -> {
-            var info = getMavenInfoFromDep(dep)
-            var domain = 'libraries.minecraft.net'
-            var url = "https://$domain/$info.path"
-            if (!checkExists(url))
-                url.values[0] = 'maven.minecraftforge.net'
+	public static def iso8601Now() { new Date().iso8601() }
 
-            var sha1 = sha1(dep.file)
+	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()
+	}
 
-            semaphore.acquire()
-            ret[info.key] = [
-                name: info.name,
-                downloads: [
-                    artifact: [
-                        path: info.path,
-                        url: url.toString(),
-                        sha1: sha1,
-                        size: dep.file.length()
-                    ]
-                ]
-            ]
-            semaphore.release()
-        })
-        return ret
-    }
+	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)
+	}
 
-    @CompileStatic
-    static Map getMavenInfoFromDep(ResolvedArtifact dep) {
-        return getMavenInfoFromMap([
-            group: dep.moduleVersion.id.group,
-            name: dep.moduleVersion.id.name,
-            version: dep.moduleVersion.id.version,
-            classifier: dep.classifier,
-            extension: dep.extension
-        ])
-    }
+	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
+		}
+	}
 
-    @CompileStatic
-    static Map getMavenInfoFromTask(AbstractArchiveTask task) {
-        return getMavenInfoFromMap([
-            group: task.project.group.toString(),
-            name: task.project.name,
-            version: task.project.version.toString(),
-            classifier: task.archiveClassifier.get(),
-            extension: task.archiveExtension.get()
-        ])
-    }
-
-    @CompileStatic
-    static Map getMavenInfoFromTask(Task task, String classifier) {
-        return getMavenInfoFromMap([
-            group: task.project.group.toString(),
-            name: task.project.name,
-            version: task.project.version.toString(),
-            classifier: classifier,
-            extension: 'jar'
-        ])
-    }
-
-    @CompileStatic
-    private static Map getMavenInfoFromMap(Map<String, String> art) {
-        var key = "$art.group:$art.name"
-        var name = "$art.group:$art.name:$art.version"
-        var path = "${art.group.replace('.', '/')}/$art.name/$art.version/$art.name-$art.version"
-        if (art.classifier !== null) {
-            name += ":$art.classifier"
-            path += "-$art.classifier"
-        }
-        if ('jar' != art.extension) {
-            name += "@$art.extension"
-            path += ".$art.extension"
-        } else {
-            path += ".jar"
-        }
-        return [
-            key: key.toString(),
-            name: name.toString(),
-            path: path.toString(),
-            art: art
-        ]
-    }
-
-    static String iso8601Now() { new Date().iso8601() }
-
-    @CompileStatic
-    static String sha1(File file) {
-        MessageDigest md = MessageDigest.getInstance('SHA-1')
-        file.eachByte(4096) { byte[] bytes, int size ->
-            md.update(bytes, 0, size)
-        }
-        return md.digest().collect(this.&toHex).join('')
-    }
-
-    @CompileStatic
-    private static String toHex(byte bite) {
-        return String.format('%02x', bite)
-    }
-
-    private static Map artifactTree(Project project, String artifact, boolean transitive = true) {
-        if (!project.ext.has('tree_resolver'))
-            project.ext.tree_resolver = 1
-        def cfg = project.configurations.create('tree_resolver_' + project.ext.tree_resolver++)
-        cfg.transitive = transitive
-        def dep = project.dependencies.create(artifact)
-        cfg.dependencies.add(dep)
-        def files = cfg.resolve()
-        return getArtifacts(cfg)
-    }
-
-    @CompileStatic
-    static boolean checkExists(String url) {
-        try {
-            return HTTP.send(HttpRequest.newBuilder(new URI(url))
-                    .method('HEAD', HttpRequest.BodyPublishers.noBody()).build(), HttpResponse.BodyHandlers.discarding()
-            ).statusCode() === 200
-        } catch (Exception e) {
-            if (e.toString().contains('unable to find valid certification path to requested target'))
-                throw new RuntimeException("Failed to connect to $url: Missing certificate root authority, try updating Java")
-            throw e
-        }
-    }
-
-    static String getLatestForgeVersion(String mcVersion) {
+    static String getLatestForgeVersion(mcVersion) {
         final json = new JsonSlurper().parseText(new URL('https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json').getText('UTF-8'))
         final ver = json.promos["$mcVersion-latest"]
         ver === null ? null : (mcVersion + '-' + ver)
     }
 
-    @CompileStatic
-    static void processClassNodes(File file, @ClosureParams(value = SimpleType, options = 'org.objectweb.asm.tree.ClassNode') Closure process) {
+    static void processClassNodes(File file, Closure process) {
         file.withInputStream { i ->
             new ZipInputStream(i).withCloseable { zin ->
                 ZipEntry zein
-                while ((zein = zin.nextEntry) !== null) {
+                while ((zein = zin.nextEntry) != null) {
                     if (zein.name.endsWith('.class')) {
-                        var node = new ClassNode(ASM_LEVEL)
+                        def node = new ClassNode(ASM_LEVEL)
                         new ClassReader(zin).accept(node, 0)
                         process(node)
                     }
@@ -227,4 +162,4 @@ final class Util {
             }
         }
     }
-}
+}

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

@@ -5,7 +5,6 @@
 
 package net.minecraftforge.forge.tasks
 
-import groovy.transform.CompileStatic
 import net.minecraftforge.srgutils.MinecraftVersion
 import org.gradle.api.DefaultTask
 import org.gradle.api.file.RegularFileProperty
@@ -29,8 +28,8 @@ abstract class ValidateDeprecations extends DefaultTask {
 
     @TaskAction
     protected void exec() {
-        var mcVer = MinecraftVersion.from(mcVersion.get())
-        List<String> errors = []
+        def mcVer = MinecraftVersion.from(mcVersion.get())
+        def errors = []
 
         Util.processClassNodes(input.get().asFile) {
             processNode(mcVer, errors, it)
@@ -66,7 +65,7 @@ abstract class ValidateDeprecations extends DefaultTask {
         }
     }
 
-    private static void processAnnotations(AnnotationNode annotation, MinecraftVersion mcVer, List<String> errors, Closure<String> context) {
+    private static void processAnnotations(AnnotationNode annotation, MinecraftVersion mcVer, List<String> errors, Closure context) {
         def values = annotation.values
         if (values === null)
             return
@@ -74,7 +73,7 @@ abstract class ValidateDeprecations extends DefaultTask {
         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])
-            int[] split = ValidateDeprecations.splitDots(oldVersion.toString())
+            def split = ValidateDeprecations.splitDots(oldVersion.toString())
             if (split.length < 2)
                 return
             def removeVersion = MinecraftVersion.from("${split[0]}.${split[1] + 1}")
@@ -83,7 +82,6 @@ abstract class ValidateDeprecations extends DefaultTask {
         }
     }
 
-    @CompileStatic
     private static int[] splitDots(String version) {
         String[] pts = version.split('\\.')
         int[] values = new int[pts.length]

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

@@ -17,15 +17,17 @@ 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).join('\n')
+                it.text = joinBack(lines, inheritance, mappings).join('\n')
             }
         }
     }
@@ -168,18 +170,45 @@ abstract class CheckATs extends CheckTask {
         return lines
     }
 
-    private static List<String> joinBack(TreeMap<String, ATParser.Entry> lines, Map<String, InheritanceData> inheritance) {
+    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 = null //value.comment
+                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 = null //entry.comment
+                    final comment = remapComment(entry)
                     data.add(line + (comment ? ' ' + comment : ''))
                 }
                 data.add('#endgroup')
@@ -260,7 +289,6 @@ class ATParser {
         final String comment = idx === -1 ? null : line.substring(idx)
         if (idx !== -1) line = line.substring(0, idx - 1)
         final data = (line.trim() + '     ').split(' ', -1)
-    	data[1] = data[1].replaceAll('/', '.') // Convert to Source names, internal names are fine by spec, but not supported by old AST based AT implementations.
         new Entry(data[0], data[1], data[2], comment)
     }
 

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

@@ -26,12 +26,12 @@ abstract class CheckExcs extends CheckTask {
         excs.each { f ->
             final lines = []
             f.eachLine { line ->
-                int idx = line.indexOf('#')
-                if (idx === 0 || line.isEmpty()) {
+                def idx = line.indexOf('#')
+                if (idx == 0 || line.isEmpty()) {
                     return
                 }
 
-                if (idx !== -1) line = line.substring(0, idx - 1)
+                if (idx != -1) line = line.substring(0, idx - 1)
 
                 if (!line.contains('=')) {
                     reporter.report("Invalid: $line")
@@ -58,8 +58,6 @@ abstract class CheckExcs extends CheckTask {
                     return
                 }
                 lines.add(line)
-
-                return
             }
 
             if (fix) f.text = lines.sort().join('\n')

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

@@ -6,6 +6,4 @@ import groovy.transform.CompileStatic
 enum CheckMode {
     CHECK,
     FIX
-
-    CheckMode() {}
 }

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

@@ -36,13 +36,13 @@ abstract class CheckPatches extends CheckTask {
         }
     }
     
-    static boolean accessChange(String previous, String current) {
+    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) {
-        int oldFixedErrors = reporter.fixed.size()
+        final oldFixedErrors = reporter.fixed.size()
 
         final lines = Files.readAllLines(patch)
 
@@ -140,7 +140,7 @@ abstract class CheckPatches extends CheckTask {
                     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: $patchPath \n$prevLine\n$line\n${lines[i+1]}", false)
+                        reporter.report("Patch contains white space change in valid hunk at line ${i + 1}, file: $patchPath", false)
                     }
                 }
 

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

@@ -94,7 +94,7 @@ abstract class CheckSAS extends CheckTask {
         }
     }
 
-    protected static boolean isSided(Annotatable annotatable) {
+    protected static isSided(Annotatable annotatable) {
         if (annotatable === null) return false
         for (ann in annotatable.annotations) {
             if ('Lnet/minecraftforge/api/distmarker/OnlyIn;' == ann.desc)
@@ -104,7 +104,7 @@ abstract class CheckSAS extends CheckTask {
     }
     
     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]) }
+        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

@@ -1,8 +1,6 @@
 package net.minecraftforge.forge.tasks.checks
 
 import groovy.transform.CompileStatic
-import groovy.transform.stc.ClosureParams
-import groovy.transform.stc.ThirdParam
 import net.minecraftforge.forge.tasks.Util
 import org.gradle.api.Action
 import org.gradle.api.DefaultTask
@@ -35,7 +33,7 @@ abstract class CheckTask extends DefaultTask implements VerificationTask {
     void run() {
         Util.init()
 
-        boolean doFix = getMode().get() === CheckMode.FIX
+        final doFix = getMode().get() === CheckMode.FIX
         final Reporter reporter = new Reporter(doFix)
         check(reporter, doFix)
 
@@ -90,8 +88,7 @@ abstract class CheckTask extends DefaultTask implements VerificationTask {
     }
 
     static <T extends CheckTask> void registerTask(TaskContainer tasks, String taskName, @DelegatesTo.Target('type') Class<T> clazz,
-                                                   @DelegatesTo(genericTypeIndex = 0, target = 'type')
-                                                   @ClosureParams(ThirdParam.FirstGenericType) Closure configuration) {
+                                                   @DelegatesTo(genericTypeIndex = 0, target = 'type') Closure configuration) {
         taskName = taskName.capitalize()
         tasks.register("check$taskName", clazz) { CheckTask task ->
             def castedTask = task as T

build_clean.gradle

@@ -1,73 +0,0 @@
-plugins {
-    id 'java-library'
-    id 'net.minecraftforge.gradle.patcher'
-}
-
-evaluationDependsOn(':mcp')
-
-repositories {
-    mavenCentral()
-    maven gradleutils.forgeMaven
-    maven gradleutils.minecraftLibsMaven
-}
-    
-java.toolchain.languageVersion = JavaLanguageVersion.of(JAVA_VERSION)
-
-dependencies {
-	implementation(libs.forgespi)
-}
-
-patcher {
-	parent = project(':mcp')
-	mcVersion = MC_VERSION
-	patchedSrc = file('src/main/java')
-
-	mappings channel: MAPPING_CHANNEL, version: MAPPING_VERSION
-
-	runs {
-		clean_client {
-			client true
-			taskName 'clean_client'
-			ideaModule "${rootProject.name}.${project.name}.main"
-
-			main 'net.minecraft.client.main.Main'
-			workingDirectory project.file('run/client')
-
-			args '--gameDir', '.'
-			args '--version', MC_VERSION
-			args '--assetsDir', downloadAssets.output
-			args '--assetIndex', '{asset_index}'
-			args '--accessToken', '0'
-		}
-
-		clean_server {
-			client false
-			taskName 'clean_server'
-			ideaModule "${rootProject.name}.${project.name}.main"
-
-			main 'net.minecraft.server.Main'
-			workingDirectory project.file('run/server')
-		}
-	}
-}
-
-tasks.withType(JavaCompile).configureEach {
-    options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
-    options.warnings = false // Shutup deprecated for removal warnings
-}
-
-eclipse.classpath.file.whenMerged {
-	// Disable optional warnings on the minecraft decompiled source code. It just muddies the warning window and hides warnings in our own codebase
-	def src = entries.find { it.path == 'src/main/java' }
-    if (src == null) throw new IllegalStateException("You must run `setup` task before importing")
-    src.entryAttributes['ignore_optional_problems'] = 'true'
-}
-
-tasks.named('genPatches').configure {
-    onlyIf { false }
-}
-
-tasks.named('extractRangeMap').configure {
-    onlyIf { false }
-    tool = 'net.minecraftforge:Srg2Source:8.1.0:fatjar'
-}

build_shared.gradle

@@ -1,89 +0,0 @@
-import net.minecraftforge.forge.tasks.CleanProperties
-
-apply plugin: 'eclipse'
-apply plugin: 'idea'
-apply plugin: 'net.minecraftforge.gradleutils'
-
-group = 'net.minecraftforge'
-version = VERSION
-println("Version: $version")
-
-repositories {
-    mavenCentral()
-    maven gradleutils.forgeMaven
-    maven gradleutils.minecraftLibsMaven
-    //mavenLocal()
-}
-
-tasks.withType(Javadoc).configureEach {
-    options.tags = [
-        'apiNote:a:<em>API Note:</em>',
-        'implSpec:a:<em>Implementation Requirements:</em>',
-        'implNote:a:<em>Implementation Note:</em>'
-    ]
-    options.addStringOption('Xdoclint:all,-missing', '-public')
-}
-
-// We need to write the manifest to the binary file so we have properly versioned packaged at dev time.
-tasks.register('writeManifest') {
-    doLast {
-        if (plugins.findPlugin('net.minecraftforge.gradle.patcher')) // Forge project
-            universalJar.manifest.writeTo(rootProject.file('src/main/resources/META-INF/MANIFEST.MF'))
-        else
-            jar.manifest.writeTo(project.file('src/main/resources/META-INF/MANIFEST.MF'))
-    }
-}
-
-tasks.register('generateResources') {
-    dependsOn('writeManifest')
-}
-
-tasks.named('processResources') {
-    dependsOn(generateResources)
-}
-
-// Make sure out manifests get written before compiling the code, IDEA calls this task if you tell it to use the gradle build.
-tasks.withType(JavaCompile).configureEach {
-    dependsOn 'generateResources'
-    dependsOn 'processResources' // Needed because we merge the output of this with the output of the compile task. And gradle detects downstream tasks using the output without a hard dep
-    options.encoding = 'UTF-8' // Use the UTF-8 charset for Java compilation
-    options.warnings = false // Shutup deprecated for removal warnings
-    options.forkOptions.jvmArgs += '-Xmx6G' // Needed to make compiling faster, and not run out of heap space in some cases.
-}
-
-// Merge the resources and classes into the same directory. We'll need to split them at runtime because
-// Minecraft and Forge are in the same sourceSet as they are inter dependent.. for now..
-sourceSets.each {
-    def dir = layout.buildDirectory.dir("classes/java/$it.name")
-    it.output.resourcesDir = dir
-    it.java.destinationDirectory = dir
-}
-
-tasks.register('copyEclipseSettings') {
-    doLast {
-        rootProject.fileTree('ide/eclipse/template/.settings/').matching { include '**/*.prefs' }.each { file ->
-            def target = project.file('.settings/' + file.name)
-            def temp = new CleanProperties().load(file)
-            def exst = new CleanProperties().load(target)
-            exst.put('eclipse.preferences.version', '1')
-            exst.putAll(temp)
-            exst.store(target)
-        }
-    }
-}
-
-// TODO: [Gradle][IntelliJ] Auto trigger these tasks on import.
-eclipse {
-    // Run everytime eclipse builds the code
-    //autoBuildTasks writeManifest
-    // Run when importing the project
-    synchronizationTasks generateResources, copyEclipseSettings, eclipseClasspath, eclipseProject
-}
-
-idea {
-    module {
-        // IntelliJ IDEA does not do this by itself anymore...
-        downloadJavadoc = true
-        downloadSources = true
-    }
-}

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=26.1.2-&query=$.promos["26.1.2-latest"]&color=brightgreen&logo=data:image/svg+xml;base64,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)][Download]
-[![Latest Release](https://img.shields.io/badge/dynamic/json?url=https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json&label=Latest&prefix=26.2-&query=$.promos["26.2-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=$.promos["1.20.1-recommended"]&color=brightgreen&logo=data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPHN2ZyBjbGFzcz0ic3ZnLWlubGluZS0tZmEgZmEtc3RhciBmYS13LTE4IiBhcmlhLWhpZGRlbj0idHJ1ZSIgZGF0YS1pY29uPSJzdGFyIiBkYXRhLXByZWZpeD0iZmFzIiBmb2N1c2FibGU9ImZhbHNlIiByb2xlPSJpbWciIHZpZXdCb3g9IjAgMCA1NzYgNTEyIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPgo8cGF0aCBkPSJNMjU5LjMgMTcuOEwxOTQgMTUwLjIgNDcuOSAxNzEuNWMtMjYuMiAzLjgtMzYuNyAzNi4xLTE3LjcgNTQuNmwxMDUuNyAxMDMtMjUgMTQ1LjVjLTQuNSAyNi4zIDIzLjIgNDYgNDYuNCAzMy43TDI4OCA0MzkuNmwxMzAuNyA2OC43YzIzLjIgMTIuMiA1MC45LTcuNCA0Ni40LTMzLjdsLTI1LTE0NS41IDEwNS43LTEwM2MxOS0xOC41IDguNS01MC44LTE3LjctNTQuNkwzODIgMTUwLjIgMzE2LjcgMTcuOGMtMTEuNy0yMy42LTQ1LjYtMjMuOS01Ny40IDB6IiBmaWxsPSJ3aGl0ZSIvPgo8L3N2Zz4K)][Download]
+[![Latest Release](https://img.shields.io/badge/dynamic/json?url=https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json&label=Latest&prefix=1.20.1-&query=$.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]
@@ -26,24 +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              |
-|------------------|-------------------|
-| 26.1+            | [25][Adoptium-25] |
-| 1.20.6 - 1.21.11 | [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].
@@ -71,33 +58,19 @@ 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-25]: https://adoptium.net/temurin/releases/?version=25
-[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/
 
-[Documentation]: https://docs.minecraftforge.net/
-[Getting-Started]: https://docs.minecraftforge.net/en/latest/gettingstarted/
-[ForgeDev]: https://docs.minecraftforge.net/en/latest/forgedev/
-[Pull-Requests]: https://docs.minecraftforge.net/en/latest/forgedev/#making-changes-and-pull-requests
+[Documentation]: https://docs.minecraftforge.net/en/1.20.1/
+[Getting-Started]: https://docs.minecraftforge.net/en/1.20.1/gettingstarted/
+[ForgeDev]: https://docs.minecraftforge.net/en/1.20.1/forgedev/
+[Pull-Requests]: https://docs.minecraftforge.net/en/1.20.1/forgedev/#making-changes-and-pull-requests
 
 [Patreon]: https://www.patreon.com/LexManos
-[YourKit Java Profiler]: https://www.yourkit.com/java/profiler/

dump.sh

@@ -1,24 +0,0 @@
-#!/usr/bin/env bash
-
-for file in $(find repo | grep --invert-match -e md5 -e sha | grep -e .jar -e .zip); do
-    file_path=$(realpath $file)
-    file_name=$(basename $file)
-    
-    echo "$file_name"
-    files=$(unzip -l $file | awk '{print $4}')
-    for f in $files; do
-        out="_actual/$file_name/$f"
-        parent=$(dirname "$out")
-        echo $out
-        
-        if [ ! -d "$parent" ]; then
-            mkdir -p "$parent"
-        fi
-            
-        if [[ $f == *.class ]]; then
-            javap -v -p jar:file://$file_path!/$f | tail -n +4 >$out.txt
-        elif [[ $f != */ && $f != "Name" && $f != "----" ]]; then
-            unzip -o -q $file $f -d _actual/$file_name
-        fi
-    done
-done

fmlcore/build.gradle

@@ -1,68 +1,74 @@
-import net.minecraftforge.gradleutils.PomUtils
-
 plugins {
-    id 'java-library'
-    id 'maven-publish'
-    id 'net.minecraftforge.licenser'
-    id 'net.minecraftforge.gradleutils'
+    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'
 
-apply from: rootProject.file('build_shared.gradle')
+dependencyUpdates.rejectVersionIf { isNonStable(it.candidate.version) }
 
 dependencies {
-    compileOnly(libs.jetbrains.annotations)
+    compileOnly("org.jetbrains:annotations:${JETBRAINS_ANNOTATIONS_VERSION}")
 
-    api(libs.eventbus)
-    annotationProcessor(libs.eventbus.validator)
+    api("net.minecraftforge:eventbus:${EVENTBUS_VERSION}")
 
     implementation(project(':fmlloader'))
-    implementation(libs.commons.io)
+    implementation("commons-io:commons-io:${COMMONS_IO_VERSION}")
 }
 
-java {
-    toolchain.languageVersion = JavaLanguageVersion.of(JAVA_VERSION)
-    withSourcesJar()
+task sourcesJar(type: Jar) {
+    archiveClassifier = 'sources'
+    from sourceSets.main.allSource
 }
 
-tasks.named('jar', Jar).configure {
-    manifest {
-        attributes([
-            'Automatic-Module-Name': 'net.minecraftforge.fmlcore',
-            'FMLModType': 'LIBRARY'
-        ] as LinkedHashMap)
-        attributes([
-            'Specification-Title':      'FML',
+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',
+            'Implementation-Title':     'FML Loader',
             'Implementation-Version':   '1.0',
-            'Implementation-Vendor':    'Forge Development LLC'
-        ] as LinkedHashMap, 'net/minecraftforge/fml/')
+            '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).configureEach {
-    options.compilerArgs << '-Xlint:-unchecked'
+tasks.withType(JavaCompile) {
+    options.compilerArgs << '-Xlint:unchecked'
 }
 
 license {
     header = rootProject.file('LICENSE-header.txt')
+
+    include 'net/minecraftforge/'
 }
 
-publishing {
-    publications.register('mavenJava', MavenPublication).configure {
-        from components.java
-        artifactId = 'fmlcore'
-        pom {
-            name = project.name
-            description = 'Modifactions to Minecraft to enable mod developers.'
-            url = 'https://github.com/MinecraftForge/MinecraftForge'
-            PomUtils.setGitHubDetails(pom, 'MinecraftForge')
-            license PomUtils.Licenses.LGPLv2_1
-        }
-    }
-    
-    repositories {
-        maven gradleutils.publishingForgeMaven
-    }
+artifacts {
+    archives jar
+    archives sourcesJar
 }
+
+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/CrashReportCallables.java

@@ -14,14 +14,16 @@ import java.util.List;
 import java.util.function.BooleanSupplier;
 import java.util.function.Supplier;
 
-public class CrashReportCallables {
+public class CrashReportCallables
+{
     private static final Logger LOGGER = LogUtils.getLogger();
     private static final List<ISystemReportExtender> crashCallables = Collections.synchronizedList(new ArrayList<>());
 
     /**
      * Register a custom {@link ISystemReportExtender}
      */
-    public static void registerCrashCallable(ISystemReportExtender callable) {
+    public static void registerCrashCallable(ISystemReportExtender callable)
+    {
         crashCallables.add(callable);
     }
 
@@ -31,15 +33,19 @@ public class CrashReportCallables {
      * @param headerName The name of the system report entry
      * @param reportGenerator The report generator to be called when a crash report is built
      */
-    public static void registerCrashCallable(String headerName, Supplier<String> reportGenerator) {
-        registerCrashCallable(new ISystemReportExtender() {
+    public static void registerCrashCallable(String headerName, Supplier<String> reportGenerator)
+    {
+        registerCrashCallable(new ISystemReportExtender()
+        {
             @Override
-            public String getLabel() {
+            public String getLabel()
+            {
                 return headerName;
             }
 
             @Override
-            public String get() {
+            public String get()
+            {
                 return reportGenerator.get();
             }
         });
@@ -52,23 +58,31 @@ public class CrashReportCallables {
      * @param reportGenerator The report generator to be called when a crash report is built
      * @param active The supplier of the flag to be checked when a crash report is built
      */
-    public static void registerCrashCallable(String headerName, Supplier<String> reportGenerator, BooleanSupplier active) {
-        registerCrashCallable(new ISystemReportExtender() {
+    public static void registerCrashCallable(String headerName, Supplier<String> reportGenerator, BooleanSupplier active)
+    {
+        registerCrashCallable(new ISystemReportExtender()
+        {
             @Override
-            public String getLabel() {
+            public String getLabel()
+            {
                 return headerName;
             }
 
             @Override
-            public String get() {
+            public String get()
+            {
                 return reportGenerator.get();
             }
 
             @Override
-            public boolean isActive() {
-                try {
+            public boolean isActive()
+            {
+                try
+                {
                     return active.getAsBoolean();
-                } catch (Throwable t) {
+                }
+                catch (Throwable t)
+                {
                     LOGGER.warn("CrashCallable '{}' threw an exception while checking the active flag, disabling", headerName, t);
                     return false;
                 }
@@ -76,7 +90,8 @@ public class CrashReportCallables {
         });
     }
 
-    public static List<ISystemReportExtender> allCrashCallables() {
+    public static List<ISystemReportExtender> allCrashCallables()
+    {
         return List.copyOf(crashCallables);
     }
 }

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

@@ -0,0 +1,262 @@
+/*
+ * Copyright (c) Forge Development LLC and contributors
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
+package net.minecraftforge.fml;
+
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.fml.loading.FMLEnvironment;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.io.Serializable;
+import java.lang.invoke.SerializedLambda;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.Objects;
+import java.util.concurrent.Callable;
+import java.util.function.Supplier;
+
+/**
+ * Use to execute code conditionally based on sidedness.
+ * <ul>
+ * <li>When you want to call something on one side and return a result {@link #safeCallWhenOn(Dist, Supplier)}</li>
+ * <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>
+ */
+public final class DistExecutor
+{
+    private static final Logger LOGGER = LogManager.getLogger();
+    private DistExecutor() {}
+
+    /**
+     * Run the callable in the supplier only on the specified {@link Dist}.
+     * This method is NOT sided-safe and special care needs to be taken in code using this method that implicit class
+     * loading is not triggered by the Callable.
+     *
+     * This method can cause unexpected ClassNotFound exceptions.
+     *
+     * Use {@link #safeCallWhenOn(Dist, Supplier)} where possible.
+     *
+     * @param dist The dist to run on
+     * @param toRun A supplier of the callable to run (Supplier wrapper to ensure classloading only on the appropriate dist)
+     * @param <T> The return type from the callable
+     * @return The callable's result
+     * @deprecated use {@link #safeCallWhenOn(Dist, Supplier)} instead. This remains for advanced use cases.
+     */
+    @Deprecated
+    public static <T> T callWhenOn(Dist dist, Supplier<Callable<T>> toRun) {
+        return unsafeCallWhenOn(dist, toRun);
+    }
+
+    public static <T> T unsafeCallWhenOn(Dist dist, Supplier<Callable<T>> toRun) {
+        if (dist == FMLEnvironment.dist) {
+            try
+            {
+                return toRun.get().call();
+            }
+            catch (Exception e)
+            {
+                throw new RuntimeException(e);
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Call the SafeCallable when on the correct {@link Dist}.
+     *
+     * <strong>The lambda supplied here is required to be a method reference to a method defined in
+     * another class, otherwise an invalid SafeReferent error will be thrown</strong>
+     * @param dist the dist which this will run on
+     * @param toRun the SafeCallable to run and return the result from
+     * @param <T> The type of the SafeCallable
+     * @return the result of the SafeCallable or null if on the wrong side
+     */
+    public static <T> T safeCallWhenOn(Dist dist, Supplier<SafeCallable<T>> toRun) {
+        validateSafeReferent(toRun);
+        return callWhenOn(dist, toRun::get);
+    }
+
+    /**
+     * Runs the supplied Runnable on the speicified side. Same warnings apply as {@link #callWhenOn(Dist, Supplier)}.
+     *
+     * This method can cause unexpected ClassNotFound exceptions.
+     *
+     * @see #callWhenOn(Dist, Supplier)
+     * @param dist Dist to run this code on
+     * @param toRun The code to run
+     * @deprecated use {@link #safeRunWhenOn(Dist, Supplier)} where possible. Advanced uses only.
+     */
+    @Deprecated
+    public static void runWhenOn(Dist dist, Supplier<Runnable> toRun) {
+        unsafeRunWhenOn(dist, toRun);
+    }
+    /**
+     * Runs the supplied Runnable on the speicified side. Same warnings apply as {@link #unsafeCallWhenOn(Dist, Supplier)}.
+     *
+     * This method can cause unexpected ClassNotFoundException problems in common scenarios. Understand the pitfalls of
+     * the way the class verifier works to load classes before using this.
+     *
+     * Use {@link #safeRunWhenOn(Dist, Supplier)} if you can.
+     *
+     * @see #unsafeCallWhenOn(Dist, Supplier)
+     * @param dist Dist to run this code on
+     * @param toRun The code to run
+     */
+    public static void unsafeRunWhenOn(Dist dist, Supplier<Runnable> toRun) {
+        if (dist == FMLEnvironment.dist) {
+            toRun.get().run();
+        }
+    }
+
+    /**
+     * Call the supplied SafeRunnable when on the correct Dist.
+     * @param dist The dist to run on
+     * @param toRun The code to run
+     */
+    public static void safeRunWhenOn(Dist dist, Supplier<SafeRunnable> toRun) {
+        validateSafeReferent(toRun);
+        if (dist == FMLEnvironment.dist)  {
+            toRun.get().run();
+        }
+    }
+    /**
+     * Executes one of the two suppliers, based on which side is active.
+     *
+     * <p>
+     *     Example (replacement for old SidedProxy):<br/>
+     * {@code Proxy p = DistExecutor.runForDist(()->ClientProxy::new, ()->ServerProxy::new);}
+     *
+     * NOTE: the double supplier is required to avoid classloading the secondary target.
+     *
+     * @param clientTarget The supplier supplier to run when on the {@link Dist#CLIENT}
+     * @param serverTarget The supplier supplier to run when on the {@link Dist#DEDICATED_SERVER}
+     * @param <T> The common type to return
+     * @return The returned instance
+     * @deprecated Use {@link #safeRunForDist(Supplier, Supplier)}
+     */
+    @Deprecated
+    public static <T> T runForDist(Supplier<Supplier<T>> clientTarget, Supplier<Supplier<T>> serverTarget) {
+        return unsafeRunForDist(clientTarget, serverTarget);
+    }
+
+    /**
+     * Unsafe version of {@link #safeRunForDist(Supplier, Supplier)}. Use only when you know what you're doing
+     * and understand why the verifier can cause unexpected ClassNotFoundException crashes even when code is apparently
+     * not sided. Ensure you test both sides fully to be confident in using this.
+     *
+     * @param clientTarget The supplier supplier to run when on the {@link Dist#CLIENT}
+     * @param serverTarget The supplier supplier to run when on the {@link Dist#DEDICATED_SERVER}
+     * @param <T> The common type to return
+     * @return The returned instance
+     */
+    public static <T> T unsafeRunForDist(Supplier<Supplier<T>> clientTarget, Supplier<Supplier<T>> serverTarget) {
+        switch (FMLEnvironment.dist)
+        {
+            case CLIENT:
+                return clientTarget.get().get();
+            case DEDICATED_SERVER:
+                return serverTarget.get().get();
+            default:
+                throw new IllegalArgumentException("UNSIDED?");
+        }
+    }
+    /**
+     * Executes one of the two suppliers, based on which side is active.
+     *
+     * <p>
+     *     Example (replacement for old SidedProxy):<br/>
+     * {@code Proxy p = DistExecutor.safeRunForDist(()->ClientProxy::new, ()->ServerProxy::new);}
+     *
+     * NOTE: the double supplier is required to avoid classloading the secondary target.
+     *
+     * @param clientTarget The supplier supplier to run when on the {@link Dist#CLIENT}
+     * @param serverTarget The supplier supplier to run when on the {@link Dist#DEDICATED_SERVER}
+     * @param <T> The common type to return
+     * @return The returned instance
+     */
+    public static <T> T safeRunForDist(Supplier<SafeSupplier<T>> clientTarget, Supplier<SafeSupplier<T>> serverTarget) {
+        validateSafeReferent(clientTarget);
+        validateSafeReferent(serverTarget);
+        switch (FMLEnvironment.dist)
+        {
+            case CLIENT:
+                return clientTarget.get().get();
+            case DEDICATED_SERVER:
+                return serverTarget.get().get();
+            default:
+                throw new IllegalArgumentException("UNSIDED?");
+        }
+    }
+
+    /**
+     * A safe referent. This will assert that it is being called via a separated class method reference. This will
+     * avoid the common pitfalls of {@link #callWhenOn(Dist, Supplier)} above.
+     *
+     * SafeReferents assert that they are defined as a separate method outside the scope of the calling class.
+     *
+     * <strong>Implementations need to be defined in a separate class to the referring site, with appropriate
+     * visibility to be accessible at the callsite (generally, avoid private methods).</strong>
+     *
+     * <p>
+     * Valid:<br/>
+     *
+     * {@code DistExecutor.safeCallWhenOn(Dist.CLIENT, ()->AnotherClass::clientOnlyMethod);}
+     *
+     * <p>
+     * Invalid:<br/>
+     *
+     * {@code DistExecutor.safeCallWhenOn(Dist.CLIENT, ()->()->Minecraft.getInstance().world);}
+     */
+    public interface SafeReferent {}
+
+    /**
+     * SafeCallable version of {@link SafeReferent}.
+     * @see SafeReferent
+     * @param <T> The return type of the Callable
+     */
+    public interface SafeCallable<T> extends SafeReferent, Callable<T>, Serializable {}
+
+    /**
+     * SafeSupplier version of {@link SafeReferent}
+     * @param <T> The return type of the Supplier
+     */
+    public interface SafeSupplier<T> extends SafeReferent, Supplier<T>, Serializable {}
+
+    /**
+     * SafeRunnable version of {@link SafeReferent}
+     */
+    public interface SafeRunnable extends SafeReferent, Runnable, Serializable {}
+
+    private static final void validateSafeReferent(Supplier<? extends SafeReferent> safeReferentSupplier) {
+        if (FMLEnvironment.production) return;
+        final SafeReferent setter;
+        try {
+            setter = safeReferentSupplier.get();
+        } catch (Exception e) {
+            // Typically a class cast exception, just return out, expected.
+            return;
+        }
+
+        for (Class<?> cl = setter.getClass(); cl != null; cl = cl.getSuperclass()) {
+            try {
+                Method m = cl.getDeclaredMethod("writeReplace");
+                m.setAccessible(true);
+                Object replacement = m.invoke(setter);
+                if (!(replacement instanceof SerializedLambda))
+                    break;// custom interface implementation
+                SerializedLambda l = (SerializedLambda) replacement;
+                if (Objects.equals(l.getCapturingClass(), l.getImplClass())) {
+                    LOGGER.fatal("Detected unsafe referent usage, please view the code at {}",Thread.currentThread().getStackTrace()[3]);
+                    throw new RuntimeException("Unsafe Referent usage found in safe referent method");
+                }
+            } catch (NoSuchMethodException e) {
+            } catch (IllegalAccessException | InvocationTargetException e) {
+                break;
+            }
+        }
+    }
+}

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>
@@ -95,7 +94,7 @@ 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";
+        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";
 
         /**
          * Ignores any version information coming from the server - use for server only mods
@@ -104,8 +103,6 @@ public interface IExtensionPoint<T extends Record>
 
         /**
          * 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);
 

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

@@ -5,15 +5,16 @@
 
 package net.minecraftforge.fml;
 
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.fml.event.IModBusEvent;
 import net.minecraftforge.fml.loading.progress.ProgressMeter;
-import org.jspecify.annotations.NullMarked;
-import org.jspecify.annotations.Nullable;
 
+import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Executor;
+import java.util.function.Consumer;
 import java.util.function.Function;
-import java.util.function.IntSupplier;
-import java.util.function.Supplier;
+import java.util.function.ToIntFunction;
 
 /**
  * A mod loading state. During mod loading, the mod loader transitions between states in a defined sorted list of states,
@@ -21,7 +22,6 @@ import java.util.function.Supplier;
  *
  * @see IModStateProvider
  */
-@NullMarked
 public interface IModLoadingState {
     /**
      * {@return the name of this state}
@@ -44,46 +44,44 @@ public interface IModLoadingState {
     /**
      * {@return a function returning a human-friendly message for this state}
      */
-    Supplier<String> message();
+    Function<ModList, String> message();
 
     /**
      * @return a function that computes the size of this transition based on the size of the modlist.
      * Used to compute progress.
      */
-    default IntSupplier size() {
-        return ModList::size;
-    }
+    ToIntFunction<ModList> size();
 
     /**
      * {@return an optional runnable, which runs before starting the transition from this state to the next}
      * @see #buildTransition(Executor, Executor, ProgressMeter, Function, Function)
      */
-    @Nullable Runnable inlineRunnable();
+    Optional<Consumer<ModList>> inlineRunnable();
 
     /**
      * 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 @Nullable 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,
-            _ -> CompletableFuture.completedFuture(null),
-            _ -> 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
@@ -91,7 +89,8 @@ 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
      */
-    @Nullable CompletableFuture<Void> buildTransition(final Executor syncExecutor,
+    <T extends Event & IModBusEvent>
+    Optional<CompletableFuture<Void>> buildTransition(final Executor syncExecutor,
                                                       final Executor parallelExecutor,
                                                       final ProgressMeter progressBar,
                                                       final Function<Executor, CompletableFuture<Void>> preSyncTask,

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

@@ -5,47 +5,116 @@
 
 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;
 import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.stream.Stream;
 
-import net.minecraftforge.fml.loading.progress.ProgressMeter;
-import org.jetbrains.annotations.Nullable;
-
+@SuppressWarnings("unchecked")
 public interface IModStateTransition {
     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;
     }
 
-    @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();
 
-    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/ISystemReportExtender.java

@@ -7,10 +7,12 @@ package net.minecraftforge.fml;
 
 import java.util.function.Supplier;
 
-public interface ISystemReportExtender extends Supplier<String> {
+public interface ISystemReportExtender extends Supplier<String>
+{
     String getLabel();
 
-    default boolean isActive() {
+    default boolean isActive()
+    {
         return true;
     }
 }

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

@@ -5,20 +5,63 @@
 
 package net.minecraftforge.fml;
 
+
 import java.util.Iterator;
 import java.util.Spliterator;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.ConcurrentMap;
 import java.util.function.Consumer;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
-public final class InterModComms {
-    public record IMCMessage(String senderModId, String modId, String method, Supplier<?> messageSupplier) {}
+public class InterModComms
+{
+    public record IMCMessage(String senderModId, String modId, String method, Supplier<?> messageSupplier) {
 
-    private static final ConcurrentHashMap<String, ConcurrentLinkedQueue<IMCMessage>> containerQueues = new ConcurrentHashMap<>();
+        /**
+         * Deprecated: use {@link #senderModId()}
+         * @return The modid of the sender. This is supplied by the caller, or by the active mod container context.
+         * Consider it unreliable.
+         */
+        @Deprecated
+        public final String getSenderModId() {
+            return this.senderModId;
+        }
+
+        /**
+         * Deprecated: use {@link #modId()}
+         * @return The modid being sent to.
+         */
+        @Deprecated
+        public final String getModId() {
+            return this.modId;
+        }
+
+        /**
+         * Deprecated: use {@link #method()}
+         * @return The method being sent to.
+         */
+        @Deprecated
+        public final String getMethod() {
+            return this.method;
+        }
+
+        /**
+         * @param <T> The type of the message.
+         * @return A {@link Supplier} of the message.
+         * Use {@link #messageSupplier()}
+         */
+        @SuppressWarnings("unchecked")
+        @Deprecated
+        public final <T> Supplier<T> getMessageSupplier() {
+            return (Supplier<T>) this.messageSupplier;
+        }
+    }
+
+    private static ConcurrentMap<String, ConcurrentLinkedQueue<IMCMessage>> containerQueues = new ConcurrentHashMap<>();
 
     /**
      * Send IMC to remote. Sender will default to the active modcontainer, or minecraft if not.
@@ -29,9 +72,8 @@ public final class InterModComms {
      * @return true if the message was enqueued for sending (the target modid is loaded)
      */
     public static boolean sendTo(final String modId, final String method, final Supplier<?> thing) {
-        if (!ModList.isLoaded(modId)) return false;
-        containerQueues.computeIfAbsent(modId, _ -> new ConcurrentLinkedQueue<>())
-                .add(new IMCMessage(ModLoadingContext.get().getContainer().getModId(), modId, method, thing));
+        if (!ModList.get().isLoaded(modId)) return false;
+        containerQueues.computeIfAbsent(modId, k->new ConcurrentLinkedQueue<>()).add(new IMCMessage(ModLoadingContext.get().getActiveContainer().getModId(), modId, method, thing));
         return true;
     }
 
@@ -45,9 +87,8 @@ public final class InterModComms {
      * @return true if the message was enqueued for sending (the target modid is loaded)
      */
     public static boolean sendTo(final String senderModId, final String modId, final String method, final Supplier<?> thing) {
-        if (!ModList.isLoaded(modId)) return false;
-        containerQueues.computeIfAbsent(modId, _ -> new ConcurrentLinkedQueue<>())
-                .add(new IMCMessage(senderModId, modId, method, thing));
+        if (!ModList.get().isLoaded(modId)) return false;
+        containerQueues.computeIfAbsent(modId, k->new ConcurrentLinkedQueue<>()).add(new IMCMessage(senderModId, modId, method, thing));
         return true;
     }
 
@@ -71,17 +112,19 @@ public final class InterModComms {
      * @return All messages
      */
     public static Stream<IMCMessage> getMessages(final String modId) {
-        return getMessages(modId, _ -> true);
+        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
@@ -95,10 +138,13 @@ public final class InterModComms {
         }
 
         @Override
-        public boolean tryAdvance(final Consumer<? super IMCMessage> action) {
+        public boolean tryAdvance(final Consumer<? super IMCMessage> action)
+        {
             IMCMessage next;
-            do {
-                if (!iterator.hasNext()) {
+            do
+            {
+                if (!iterator.hasNext())
+                {
                     return false;
                 }
                 next = this.iterator.next();
@@ -113,5 +159,6 @@ public final class InterModComms {
         public Spliterator<IMCMessage> trySplit() {
             return null;
         }
+
     }
 }

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 +5,24 @@
 
 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.concurrent.CompletableFuture;
+import java.util.concurrent.Executor;
+import java.util.function.BiFunction;
 import java.util.function.BiPredicate;
+import java.util.function.Consumer;
 import java.util.function.Supplier;
 
 /**
@@ -29,31 +33,37 @@ 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<>();
+    @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, _) -> Objects.equals(incoming, 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;
             case "IGNORE_ALL_VERSION" -> // Ignores all information and provides no information
@@ -71,35 +81,58 @@ 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;
     }
 
@@ -108,7 +141,8 @@ 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);
     }
 
@@ -132,7 +166,9 @@ public abstract class ModContainer {
        configs.put(modConfig.getType(), modConfig);
     }
 
-    public void dispatchConfigEvent(IConfigEvent event) {}
+    public void dispatchConfigEvent(IConfigEvent event) {
+        configHandler.ifPresent(configHandler->configHandler.accept(event));
+    }
 
     /**
      * Does this mod match the supplied mod?
@@ -147,17 +183,9 @@ 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

@@ -5,22 +5,37 @@
 
 package net.minecraftforge.fml;
 
-import net.minecraftforge.fml.loading.LoadingModList;
+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;
 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 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;
@@ -30,131 +45,195 @@ 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 final class ModList {
-    private 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, ModFileInfo> fileById;
+    private List<ModContainer> mods;
+    private Map<String, ModContainer> indexedMods;
+    private List<ModFileScanData> modFileScanData;
+    private List<ModContainer> sortedContainers;
 
-    private static final List<IModFileInfo> MOD_FILES;
-    private static final List<IModInfo> SORTED_LIST;
-    private static final Map<String, IModFileInfo> FILE_BY_ID;
-    private static List<ModContainer> mods;
-    private static Map<String, ModContainer> indexedMods;
-    private static List<ModContainer> sortedContainers;
-
-    static {
-        var loadingModFiles = LoadingModList.getModFiles().stream().map(ModFileInfo::getFile).toList();
-        var loadingSortedList = LoadingModList.getMods();
-
-        var modFileInfos = MOD_FILES = loadingModFiles.stream().map(ModFile::getModFileInfo).toList();
-        SORTED_LIST = loadingSortedList.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());
-        }
-        FILE_BY_ID = Map.copyOf(byId);
-        CrashReportCallables.registerCrashCallable("Mod List", ModList::crashReport);
+    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);
     }
 
-    private static String getModContainerState(String modId) {
+    private String getModContainerState(String modId) {
         return getModContainerById(modId).map(ModContainer::getCurrentState).map(Object::toString).orElse("NONE");
     }
 
-    private static String fileToLine(IModFile mf) {
-        var mainMod = mf.getModInfos().getFirst();
+    private String fileToLine(IModFile mf) {
         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 static String crashReport() {
-        return "\n" + applyForEachModFile(ModList::fileToLine).collect(Collectors.joining("\n\t\t", "\t\t", ""));
+    private String crashReport() {
+        return "\n"+applyForEachModFile(this::fileToLine).collect(Collectors.joining("\n\t\t", "\t\t", ""));
     }
 
-    public static void init() {}
-
-    public static List<IModFileInfo> getModFiles() {
-        return MOD_FILES;
+    public static ModList of(List<ModFile> modFiles, List<ModInfo> sortedList)
+    {
+        INSTANCE = new ModList(modFiles, sortedList);
+        return INSTANCE;
     }
 
-    public static IModFileInfo getModFileById(String modid) {
-        return FILE_BY_ID.get(modid);
+    public static ModList get() {
+        return INSTANCE;
     }
 
-    static void setLoadedMods(final List<ModContainer> modContainers) {
-        mods = modContainers;
-        sortedContainers = modContainers.stream().sorted(Comparator.comparingInt(c -> SORTED_LIST.indexOf(c.getModInfo()))).toList();
-        indexedMods = modContainers.stream().collect(Collectors.toUnmodifiableMap(ModContainer::getModId, Function.identity()));
+    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;
     }
 
-    static void clearLoadedMods() {
-        mods = List.of();
-        indexedMods = Map.of();
-        sortedContainers = List.of();
+    public List<IModFileInfo> getModFiles()
+    {
+        return modFiles;
+    }
+
+    public IModFileInfo getModFileById(String modid)
+    {
+        return this.fileById.get(modid);
+    }
+
+    <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.indexedMods = modContainers.stream().collect(Collectors.toMap(ModContainer::getModId, Function.identity()));
     }
 
     @SuppressWarnings("unchecked")
-    public static <T> Optional<T> getModObjectById(String modId) {
+    public <T> Optional<T> getModObjectById(String modId)
+    {
         return getModContainerById(modId).map(ModContainer::getMod).map(o -> (T) o);
     }
 
-    public static Optional<? extends ModContainer> getModContainerById(String modId) {
-        return Optional.ofNullable(indexedMods.get(modId));
+    public Optional<? extends ModContainer> getModContainerById(String modId)
+    {
+        return Optional.ofNullable(this.indexedMods.get(modId));
     }
 
-    public static Optional<? extends ModContainer> getModContainerByObject(Object obj) {
+    public Optional<? extends ModContainer> getModContainerByObject(Object obj)
+    {
         return mods.stream().filter(mc -> mc.getMod() == obj).findFirst();
     }
 
-    public static List<IModInfo> getMods() {
-        return SORTED_LIST;
+    public List<IModInfo> getMods()
+    {
+        return this.sortedList;
     }
 
-    public static boolean isLoaded(String modTarget) {
-        return indexedMods.containsKey(modTarget);
+    public boolean isLoaded(String modTarget)
+    {
+        return this.indexedMods.containsKey(modTarget);
     }
 
-    public static int size() {
+    public int size()
+    {
         return mods.size();
     }
 
-    public static List<ModFileScanData> getAllScanData() {
-        final class LazyInit {
-            private LazyInit() {}
-            private static final List<ModFileScanData> MOD_FILE_SCAN_DATA = SORTED_LIST.stream()
-                    .map(IModInfo::getOwningFile)
-                    .filter(Objects::nonNull)
-                    .map(IModFileInfo::getFile)
-                    .distinct()
-                    .map(IModFile::getScanResult)
-                    .toList();
+    public List<ModFileScanData> getAllScanData()
+    {
+        if (modFileScanData == null)
+        {
+            modFileScanData = this.sortedList.stream().
+                    map(IModInfo::getOwningFile).
+                    filter(Objects::nonNull).
+                    map(IModFileInfo::getFile).
+                    distinct().
+                    map(IModFile::getScanResult).
+                    collect(Collectors.toList());
         }
-        return LazyInit.MOD_FILE_SCAN_DATA;
+        return modFileScanData;
+
     }
 
-    public static void forEachModFile(Consumer<IModFile> fileConsumer) {
-        MOD_FILES.stream().map(IModFileInfo::getFile).forEach(fileConsumer);
+    public void forEachModFile(Consumer<IModFile> fileConsumer)
+    {
+        modFiles.stream().map(IModFileInfo::getFile).forEach(fileConsumer);
     }
 
-    public static <T> Stream<T> applyForEachModFile(Function<IModFile, T> function) {
-        return MOD_FILES.stream().map(IModFileInfo::getFile).map(function);
+    public <T> Stream<T> applyForEachModFile(Function<IModFile, T> function) {
+        return modFiles.stream().map(IModFileInfo::getFile).map(function);
     }
 
-    public static void forEachModContainer(BiConsumer<String, ModContainer> modContainerConsumer) {
+    public void forEachModContainer(BiConsumer<String, ModContainer> modContainerConsumer) {
         indexedMods.forEach(modContainerConsumer);
     }
 
-    public static void forEachModInOrder(Consumer<ModContainer> containerConsumer) {
-        sortedContainers.forEach(containerConsumer);
+    public void forEachModInOrder(Consumer<ModContainer> containerConsumer) {
+        this.sortedContainers.forEach(containerConsumer);
     }
 
-    public static List<ModContainer> getLoadedMods() {
-        return sortedContainers;
-    }
-
-    public static <T> Stream<T> applyForEachModContainer(Function<ModContainer, T> function) {
+    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

@@ -5,11 +5,16 @@
 
 package net.minecraftforge.fml;
 
-import net.minecraftforge.eventbus.api.bus.BusGroup;
+import com.google.common.collect.ImmutableList;
+import net.minecraftforge.eventbus.api.Event;
 import net.minecraftforge.fml.event.IModBusEvent;
-import net.minecraftforge.fml.loading.*;
+import net.minecraftforge.fml.loading.FMLEnvironment;
+import net.minecraftforge.fml.loading.FMLLoader;
+import net.minecraftforge.fml.loading.ImmediateWindowHandler;
+import net.minecraftforge.fml.loading.LoadingModList;
 import net.minecraftforge.fml.loading.moddiscovery.InvalidModIdentifier;
 import net.minecraftforge.fml.loading.moddiscovery.ModFileInfo;
+import net.minecraftforge.fml.loading.moddiscovery.ModInfo;
 import net.minecraftforge.fml.loading.progress.ProgressMeter;
 import net.minecraftforge.fml.loading.progress.StartupNotificationManager;
 import net.minecraftforge.forgespi.language.IModInfo;
@@ -27,6 +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;
 
@@ -66,239 +72,197 @@ import static net.minecraftforge.fml.Logging.LOADING;
  *     and completes the mod loading sequence.</dd>
  * </dl>
  */
-public final class ModLoader {
-    private ModLoader() {}
-
+public class ModLoader
+{
     private static final Logger LOGGER = LogManager.getLogger();
-    private static final ArrayList<ModLoadingException> LOADING_EXCEPTIONS = new ArrayList<>();
-    private static final ArrayList<ModLoadingWarning> LOADING_WARNINGS = new ArrayList<>();
-    private static final Consumer<String> STATUS_CONSUMER = StartupNotificationManager.modLoaderConsumer().orElse(_ -> {});
-    private static final HashSet<IModLoadingState> COMPLETED_STATES = new HashSet<>();
-    private static boolean loadingStateValid;
+    private static ModLoader INSTANCE;
+    private final LoadingModList loadingModList;
 
-    private static String computeLanguageList() {
-        return "\n" + LanguageLoadingProvider
-                .applyForEach(lp -> lp.name() + '@' + lp.getClass().getPackage().getImplementationVersion())
-                .collect(Collectors.joining("\n\t\t", "\t\t", ""));
+    private final List<ModLoadingException> loadingExceptions;
+    private final List<ModLoadingWarning> loadingWarnings;
+    private final ModStateManager stateManager;
+    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()
+    {
+        INSTANCE = this;
+        this.loadingModList = FMLLoader.getLoadingModList();
+        this.loadingExceptions = FMLLoader.getLoadingModList().getErrors().stream()
+                .flatMap(ModLoadingException::fromEarlyException)
+                .collect(Collectors.toList());
+        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());
+        FMLLoader.getLoadingModList().getModFiles().stream()
+                .filter(ModFileInfo::missingLicense)
+                .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", this::computeModLauncherServiceList);
+        CrashReportCallables.registerCrashCallable("FML Language Providers", this::computeLanguageList);
     }
 
-    private static String computeModLauncherServiceList() {
+    private String computeLanguageList() {
+        return "\n"+FMLLoader.getLanguageLoadingProvider().applyForEach(lp->lp.name() +"@"+ lp.getClass().getPackage().getImplementationVersion()).collect(Collectors.joining("\n\t\t", "\t\t", ""));
+    }
+
+    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 INSTANCE == null ? INSTANCE = new ModLoader() : INSTANCE;
+    }
+
     /**
      * Run on the primary starting thread by ClientModLoader and ServerModLoader
      * @param syncExecutor An executor to run tasks on the main thread
      * @param parallelExecutor An executor to run tasks on a parallel loading thread pool
      * @param periodicTask Optional periodic task to perform on the main thread while other activities run
      */
-    public static void gatherAndInitializeMods(final ModWorkManager.DrivenExecutor syncExecutor, final Executor parallelExecutor, final Runnable periodicTask) {
-        var loadingExceptions = LoadingModList.getErrors().stream()
-                .flatMap(ModLoadingException::fromEarlyException)
-                .toList();
-        ModLoader.LOADING_EXCEPTIONS.addAll(loadingExceptions);
-        LOADING_WARNINGS.addAll(LoadingModList.getBrokenFiles().stream()
-                .map(file -> new ModLoadingWarning(null, ModLoadingStage.VALIDATE, InvalidModIdentifier.identifyJarProblem(file.getFilePath()).orElse("fml.modloading.brokenfile"), file.getFileName()))
-                .toList());
-        Set<IModInfo> erroredModInfos;
-        if (loadingExceptions.isEmpty()) {
-            erroredModInfos = Collections.emptySet();
-        } else {
-            erroredModInfos = Collections.newSetFromMap(new IdentityHashMap<>());
-            erroredModInfos.addAll(loadingExceptions.stream().map(ModLoadingException::getModInfo).toList());
-        }
-        LoadingModList.getModFiles().stream()
-                .filter(ModFileInfo::missingLicense)
-                .filter(modFileInfo -> modFileInfo.getMods().stream().noneMatch(erroredModInfos::contains)) //Ignore files where any other mod already encountered an error
-                .map(modFileInfo -> new ModLoadingException(null, ModLoadingStage.VALIDATE, "fml.modloading.missinglicense", null, modFileInfo.getFile()))
-                .forEach(LOADING_EXCEPTIONS::add);
-        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);
-
+    public void gatherAndInitializeMods(final ModWorkManager.DrivenExecutor syncExecutor, final Executor parallelExecutor, final Runnable periodicTask) {
         ForgeFeature.registerFeature("javaVersion", ForgeFeature.VersionFeatureTest.forVersionString(IModInfo.DependencySide.BOTH, System.getProperty("java.version")));
         ForgeFeature.registerFeature("openGLVersion", ForgeFeature.VersionFeatureTest.forVersionString(IModInfo.DependencySide.CLIENT, ImmediateWindowHandler.getGLVersion()));
         loadingStateValid = true;
         FMLLoader.backgroundScanHandler.waitForScanToComplete(periodicTask);
-        if (!LOADING_EXCEPTIONS.isEmpty()) {
-            LOGGER.fatal(CORE, "Error during pre-loading phase", LOADING_EXCEPTIONS.getFirst());
-            STATUS_CONSUMER.accept("ERROR DURING MOD LOADING");
-            ModList.clearLoadedMods();
+        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.get(0));
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
+            modList.setLoadedMods(Collections.emptyList());
             loadingStateValid = false;
-            throw new LoadingFailedException(LOADING_EXCEPTIONS);
-        }
-        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);
-            }
+            throw new LoadingFailedException(loadingExceptions);
         }
+        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);
-            STATUS_CONSUMER.accept("ERROR DURING MOD LOADING");
-            ModList.clearLoadedMods();
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
+            modList.setLoadedMods(Collections.emptyList());
             loadingStateValid = false;
             throw new LoadingFailedException(failedBounds.stream()
                     .map(fb -> new ModLoadingException(fb.modInfo(), ModLoadingStage.CONSTRUCT, "fml.modloading.feature.missing", null, fb, ForgeFeature.featureValue(fb)))
                     .toList());
         }
 
-        final var modContainers = new HashMap<String, ModContainer>();
-        for (var file : LoadingModList.getModFiles()) {
-            var containers = buildMods(file.getFile());
-            for (var container : containers)
-                modContainers.put(container.getModId(), container);
-        }
-
-        if (!LOADING_EXCEPTIONS.isEmpty()) {
-            LOGGER.fatal(CORE, "Failed to initialize mod containers", LOADING_EXCEPTIONS.getFirst());
-            STATUS_CONSUMER.accept("ERROR DURING MOD LOADING");
-            ModList.clearLoadedMods();
+        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.get(0));
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
+            modList.setLoadedMods(Collections.emptyList());
             loadingStateValid = false;
-            throw new LoadingFailedException(LOADING_EXCEPTIONS);
-        }
-
-        // 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());
-        var stateList = ModStateManager.getStates(ModLoadingPhase.GATHER);
-        var progress = StartupMessageManager.addProgressBar("Mod Gather", stateList.stream().mapToInt(mls -> mls.size().getAsInt()).sum());
-        for (IModLoadingState mls : stateList) {
-            dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress);
+            throw new LoadingFailedException(loadingExceptions);
         }
+        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(modList)).sum());
+        stateList.forEach(mls->dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress));
         progress.complete();
     }
 
-    public static void loadMods(final ModWorkManager.DrivenExecutor syncExecutor, final Executor parallelExecutor, final Runnable periodicTask) {
-        var stateList = ModStateManager.getStates(ModLoadingPhase.LOAD);
-        var progress = StartupMessageManager.addProgressBar("Mod Loading", stateList.stream().mapToInt(mls -> mls.size().getAsInt()).sum());
-        for (IModLoadingState mls : stateList) {
-            dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress);
-        }
+    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());
+        stateList.forEach(mls->dispatchAndHandleError(mls, syncExecutor, parallelExecutor, periodicTask, progress));
         progress.complete();
     }
 
-    public static void finishMods(final ModWorkManager.DrivenExecutor syncExecutor, final Executor parallelExecutor, final Runnable periodicTask) {
-        var stateList = ModStateManager.getStates(ModLoadingPhase.COMPLETE);
-        var progress = StartupMessageManager.addProgressBar("Mod Complete", stateList.stream().mapToInt(mls -> mls.size().getAsInt()).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);
-
-        STATUS_CONSUMER.accept("Mod loading complete - %d mods loaded".formatted(ModList.size()));
+    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());
+        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();
     }
 
-    private static void dispatchAndHandleError(IModLoadingState state, ModWorkManager.DrivenExecutor syncExecutor, Executor parallelExecutor, final Runnable ticker, final ProgressMeter progressBar) {
+    private void dispatchAndHandleError(IModLoadingState state, ModWorkManager.DrivenExecutor syncExecutor, Executor parallelExecutor, final Runnable ticker, final ProgressMeter progressBar) {
         if (!isLoadingStateValid()) {
             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();
-        if (inlineRunnable != null) handleInlineTransition(inlineRunnable, state, syncExecutor, ticker);
-
-        var transition = state.buildTransition(syncExecutor, parallelExecutor, progressBar);
-        if (transition != null) waitForTransition(state, syncExecutor, ticker, transition);
-
-        COMPLETED_STATES.add(state);
+        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 static void handleInlineTransition(final Runnable transition, final IModLoadingState state, final ModWorkManager.DrivenExecutor syncExecutor, final Runnable ticker) {
-        var pb = StartupMessageManager.addProgressBar("State transition " + state.name() + " running", 0);
+    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);
         syncExecutor.drive(ticker);
-        transition.run();
+        transition.accept(this.modList);
         syncExecutor.drive(ticker);
         pb.complete();
         syncExecutor.drive(ticker);
     }
-
-    private static void waitForTransition(final IModLoadingState state, final ModWorkManager.DrivenExecutor syncExecutor, final Runnable ticker, final CompletableFuture<Void> transition) {
+    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);
-                STATUS_CONSUMER.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());
-            STATUS_CONSUMER.accept("ERROR DURING MOD LOADING");
+            statusConsumer.ifPresent(c->c.accept("ERROR DURING MOD LOADING"));
             throw new LoadingFailedException(modLoadingExceptions);
         }
     }
 
-    private static 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);
@@ -311,26 +275,23 @@ public final class ModLoader {
             missingMods.removeAll(modIds);
             LOGGER.fatal(LOADING, "The following mods are missing, but have classes in the jar: {}", missingMods);
 
-            LOADING_EXCEPTIONS.add(new ModLoadingException(null, ModLoadingStage.CONSTRUCT, "fml.modloading.missingclasses", null, modFile.getFilePath()));
+            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 static 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
-            LOADING_EXCEPTIONS.add(mle);
+            loadingExceptions.add(mle);
             // return an errored container instance here, because we tried and failed building a container.
             return new ErroredModContainer();
         }
@@ -341,67 +302,60 @@ public final 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;
     }
 
-    public static boolean hasCompletedState(IModLoadingState state) {
-        return COMPLETED_STATES.contains(state);
+    public boolean hasCompletedState(final String stateName) {
+        IModLoadingState state = stateManager.findState(stateName);
+        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.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.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.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, _) -> ModLoadingContext.get().setActiveContainer(mc),
-            (_, _) -> 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.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 static List<ModLoadingWarning> getWarnings() {
-        return List.copyOf(LOADING_WARNINGS);
+    public List<ModLoadingWarning> getWarnings()
+    {
+        return ImmutableList.copyOf(this.loadingWarnings);
     }
 
-    public static void addWarning(ModLoadingWarning warning) {
-        LOADING_WARNINGS.add(warning);
+    public void addWarning(ModLoadingWarning warning)
+    {
+        this.loadingWarnings.add(warning);
     }
 
     private static boolean runningDataGen = false;
@@ -410,7 +364,7 @@ public final 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

@@ -8,47 +8,37 @@ 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 org.slf4j.LoggerFactory;
+
 import java.util.function.BiPredicate;
 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();
     }
 
-    void setActiveContainer(final ModContainer container) {
+    private ModContainer activeContainer;
+
+    public void setActiveContainer(final ModContainer container) {
         this.activeContainer = container;
         this.languageExtension = container == null ? null : container.contextExtension.get();
     }
 
-    /**
-     * @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();
+    public ModContainer getActiveContainer() {
+        return activeContainer == null ? ModList.get().getModContainerById("minecraft").orElseThrow(()->new RuntimeException("Where is minecraft???!")) : activeContainer;
     }
 
-    public ModContainer getContainer() {
-        return activeContainer == null
-                ? ModList.getModContainerById("minecraft").orElseThrow(()->new RuntimeException("Where is minecraft???!"))
-                : activeContainer;
+    public String getActiveNamespace() {
+        return activeContainer == null ? "minecraft" : activeContainer.getNamespace();
     }
 
     /**
@@ -58,7 +48,7 @@ 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);
+        getActiveContainer().registerExtensionPoint(point, extension);
     }
 
     /**
@@ -67,7 +57,7 @@ public class ModLoadingContext {
      * @param displayTest The {@link IExtensionPoint.DisplayTest} to register
      */
     public void registerDisplayTest(IExtensionPoint.DisplayTest displayTest) {
-        getContainer().registerDisplayTest(() -> displayTest);
+        getActiveContainer().registerDisplayTest(() -> displayTest);
     }
 
     /**
@@ -76,7 +66,7 @@ public class ModLoadingContext {
      * @param displayTest The {@link Supplier<IExtensionPoint.DisplayTest>} to register
      */
     public void registerDisplayTest(Supplier<IExtensionPoint.DisplayTest> displayTest) {
-        getContainer().registerDisplayTest(displayTest);
+        getActiveContainer().registerDisplayTest(displayTest);
     }
 
     /**
@@ -86,7 +76,7 @@ public class ModLoadingContext {
      * @see IExtensionPoint.DisplayTest#DisplayTest(String, BiPredicate)
      */
     public void registerDisplayTest(String version, BiPredicate<String, Boolean> remoteVersionTest) {
-        getContainer().registerDisplayTest(new IExtensionPoint.DisplayTest(version, remoteVersionTest));
+        getActiveContainer().registerDisplayTest(new IExtensionPoint.DisplayTest(version, remoteVersionTest));
     }
 
     /**
@@ -96,29 +86,32 @@ public class ModLoadingContext {
      * @see IExtensionPoint.DisplayTest#DisplayTest(Supplier, BiPredicate)
      */
     public void registerDisplayTest(Supplier<String> suppliedVersion, BiPredicate<String, Boolean> remoteVersionTest) {
-        getContainer().registerDisplayTest(new IExtensionPoint.DisplayTest(suppliedVersion, remoteVersionTest));
+        getActiveContainer().registerDisplayTest(new IExtensionPoint.DisplayTest(suppliedVersion, remoteVersionTest));
     }
 
     public void registerConfig(ModConfig.Type type, IConfigSpec<?> spec) {
-        if (spec.isEmpty()) {
+        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()) {
+        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));
     }
 
+
     @SuppressWarnings("unchecked")
     public <T> T extension() {
         return (T)languageExtension;

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

@@ -5,15 +5,16 @@
 
 package net.minecraftforge.fml;
 
+import net.minecraftforge.eventbus.api.Event;
+import net.minecraftforge.fml.event.IModBusEvent;
 import net.minecraftforge.fml.loading.progress.ProgressMeter;
-import org.jspecify.annotations.NullMarked;
-import org.jspecify.annotations.Nullable;
 
+import java.util.Optional;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Executor;
+import java.util.function.Consumer;
 import java.util.function.Function;
-import java.util.function.IntSupplier;
-import java.util.function.Supplier;
+import java.util.function.ToIntFunction;
 
 /**
  * Implementation of the {@link IModLoadingState} interface.
@@ -25,26 +26,20 @@ import java.util.function.Supplier;
  * @param inlineRunnable an optional runnable, which runs before starting the transition from this state to the next
  * @param transition     optional state transition information
  */
-@NullMarked
-public record ModLoadingState(
-    String name,
-    String previous,
-    Supplier<String> message,
-    IntSupplier size,
-    ModLoadingPhase phase,
-    @Nullable Runnable inlineRunnable,
-    @Nullable 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 @Nullable CompletableFuture<Void> buildTransition(
-        final Executor syncExecutor,
-        final Executor parallelExecutor,
-        final ProgressMeter progressBar,
-        final Function<Executor, CompletableFuture<Void>> preSyncTask,
-        final Function<Executor, CompletableFuture<Void>> postSyncTask
-    ) {
-        if (transition == null) return null;
-        return 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));
     }
 
     /**
@@ -54,12 +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, () -> "", () -> 0, phase, null, null);
+        return new ModLoadingState(name, previous, ml -> "", f->0, phase, Optional.empty(), Optional.empty());
     }
 
     /**
@@ -70,13 +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));
     }
 
     /**
@@ -88,14 +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 Supplier<String> message, final ModLoadingPhase phase,
+                                                 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));
     }
 
     /**
@@ -107,75 +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 Runnable inline) {
-        return of(name, phase).after(previous).withInline(inline);
+                                             final Consumer<ModList> inline) {
+        return new ModLoadingState(name, previous, ml -> "Processing work " + name, ml->0, phase, Optional.of(inline), Optional.empty());
     }
-
-    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)
-                && this.previous.equals(that.previous);
-    }
-
-    @Override
-    public int hashCode() {
-        int result = phase.hashCode();
-        result = 31 * result + name.hashCode();
-        result = 31 * result + previous.hashCode();
-        return result;
-    }
-
-    public static final class Builder {
-        private final String name;
-        private final ModLoadingPhase phase;
-        private String after = "";
-        private @Nullable Supplier<String> message = null;
-        private @Nullable IntSupplier 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(() -> value); }
-        public Builder message(final Supplier<String> value) {
-            this.message = value;
-            return this;
-        }
-
-        public Builder size(final int value) { return size(() -> value); }
-        public Builder size(final IntSupplier value) {
-            this.size = value;
-            return this;
-        }
-
-        public ModLoadingState empty() {
-            return new ModLoadingState(name, after, message != null ? message : () -> "", size != null ? size : () -> 0, phase, null, null);
-        }
-
-        public ModLoadingState withTransition(final IModStateTransition transition) {
-            return new ModLoadingState(name, after, message != null ? message : () -> "Processing transition " + name, size != null ? size : ModList::size, phase, null, transition);
-        }
-
-        public ModLoadingState withInline(final Runnable inline) {
-            return new ModLoadingState(name, after, message != null ? message : () -> "Processing work " + name, size != null ? size : () -> 0, phase, inline, null);
-        }
-    }
-}
+}

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

@@ -5,27 +5,42 @@
 
 package net.minecraftforge.fml;
 
+import com.google.common.collect.Streams;
 import net.minecraftforge.forgespi.language.IModInfo;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Stream;
 
-/**
- * @param modInfo Mod info for mod with warning
- * @param warningStage The stage where this warning was encountered
- * @param i18nMessage I18N message to use for display
- * @param context Context for message display
- */
-public record ModLoadingWarning(IModInfo modInfo, ModLoadingStage warningStage, String i18nMessage, List<Object> context) {
-    public ModLoadingWarning(final IModInfo modInfo, final ModLoadingStage warningStage, final String i18nMessage, Object... context) {
-        this(modInfo, warningStage, i18nMessage, List.of(context));
-    }
+public class ModLoadingWarning
+{
+    /**
+     * Mod Info for mod with warning
+     */
+    private final IModInfo modInfo;
+    /**
+     * The stage where this warning was encountered
+     */
+    private final ModLoadingStage warningStage;
 
-    public ModLoadingWarning {
-        context = List.copyOf(context);
+    /**
+     * I18N message to use for display
+     */
+    private final String i18nMessage;
+
+    /**
+     * Context for message display
+     */
+    private final List<Object> context;
+
+    public ModLoadingWarning(final IModInfo modInfo, final ModLoadingStage warningStage, final String i18nMessage, Object... context) {
+        this.modInfo = modInfo;
+        this.warningStage = warningStage;
+        this.i18nMessage = i18nMessage;
+        this.context = Arrays.asList(context);
     }
 
     public String formatToString() {
-        return Bindings.getMessageParser().get().parseMessage(i18nMessage, Stream.concat(Stream.of(modInfo, warningStage), context.stream()).toArray());
+        return Bindings.getMessageParser().get().parseMessage(i18nMessage, Streams.concat(Stream.of(modInfo, warningStage), context.stream()).toArray());
     }
 }

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

@@ -15,19 +15,20 @@ import java.util.function.Function;
 import java.util.stream.Collectors;
 
 @SuppressWarnings("UnstableApiUsage")
-public final class ModStateManager {
-    private ModStateManager() {}
-    private static final EnumMap<ModLoadingPhase, List<IModLoadingState>> stateMap;
+public class ModStateManager {
+    static ModStateManager INSTANCE;
+    private final EnumMap<ModLoadingPhase, List<IModLoadingState>> stateMap;
 
-    static {
+    public ModStateManager() {
+        INSTANCE = this;
         final var sp = ServiceLoader.load(FMLLoader.getGameLayer(), IModStateProvider.class);
-        stateMap = ServiceLoaderUtils.streamWithErrorHandling(sp, _ -> {})
+        this.stateMap = ServiceLoaderUtils.streamWithErrorHandling(sp, sce->{})
                 .map(IModStateProvider::getAllStates)
-                .flatMap(List::stream)
-                .collect(Collectors.groupingBy(IModLoadingState::phase, () -> new EnumMap<>(ModLoadingPhase.class), Collectors.toUnmodifiableList()));
+                .<IModLoadingState>mapMulti(Iterable::forEach)
+                .collect(Collectors.groupingBy(IModLoadingState::phase, ()->new EnumMap<>(ModLoadingPhase.class), Collectors.toUnmodifiableList()));
     }
 
-    public static List<IModLoadingState> getStates(final ModLoadingPhase phase) {
+    public List<IModLoadingState> getStates(final ModLoadingPhase phase) {
         var nodes = stateMap.get(phase);
         var lookup = nodes.stream().collect(Collectors.toMap(IModLoadingState::name, Function.identity()));
 
@@ -35,20 +36,16 @@ public final 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 static IModLoadingState findState(final String stateName) {
-        var result = stateMap.values()
+    public IModLoadingState findState(final String stateName) {
+        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

@@ -1,180 +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
-final 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;
-        }
-    }
-
-    /// Same as [#completableFutureFromExceptionList(List)] but specialised for a single future
-    static <V> CompletionStage<Void> completableFutureFromException(FutureResult<V> t) {
-        if (t.exception() == null) {
-            return CompletableFuture.completedFuture(null);
-        } else {
-            var exception = t.exception();
-            CompletableFuture<Void> cf = new CompletableFuture<>();
-            RuntimeException accumulator = new RuntimeException();
-            cf.completeExceptionally(accumulator);
-            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((_, _)->null).thenApply(_ -> list);
-    }
-
-    private static <T extends IModBusEvent> CompletableFuture<Void> addCompletableFutureTaskForModDispatch(
-        final Executor executor,
-        final ProgressMeter progressBar,
-        final EventGenerator<T> eventGenerator,
-        final BiFunction<ModLoadingStage, Throwable, ModLoadingStage> nextState
-     ) {
-        var modFutures = new LinkedHashMap<String, CompletableFuture<Void>>();
-        for (var mod : ModList.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((_, exception) -> {
-                    mod.modLoadingStage = nextState.apply(mod.modLoadingStage, exception);
-                    progressBar.increment();
-                    ModLoadingContext.get().setActiveContainer(null);
-                });
-
-            modFutures.put(mod.getModId(), dispatch);
-        }
-
-        return gather(modFutures.values()).thenComposeAsync(ModStateTransitionHelper::completableFutureFromExceptionList, executor);
-    }
-
-    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
-    ) {
-        CompletableFuture<Void> future;
-        final var executor = transition.threadSelector().apply(syncExecutor, parallelExecutor);
-
-        final CompletableFuture<Void> preSyncTaskCF = preSyncTask.apply(syncExecutor);
-        CompletableFuture<Void> postEventDispatchCF = preSyncTaskCF
-            .thenRunAsync(() -> progressBar.label(progressBar.name() + ": dispatching " + name), parallelExecutor);
-
-        var eventGenerator = transition.eventFunction();
-        if (eventGenerator != null) {
-            BiFunction<ModLoadingStage, Throwable, ModLoadingStage> state = transition.nextModLoadingStage();
-            future = addCompletableFutureTaskForModDispatch(executor, progressBar, eventGenerator, state);
-
-            final CompletableFuture<Void> eventDispatchCF = future.handle(FutureResult::new)
-                    .thenCompose(ModStateTransitionHelper::completableFutureFromException);
-            postEventDispatchCF = postEventDispatchCF.thenComposeAsync(_ -> eventDispatchCF, parallelExecutor);
-        }
-
-        postEventDispatchCF = postEventDispatchCF.thenRun(() -> postSyncTask.apply(syncExecutor));
-
-        return transition.finalActivityGenerator().apply(syncExecutor, postEventDispatchCF);
-    }
-}

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

@@ -14,20 +14,30 @@ import java.util.concurrent.locks.LockSupport;
 
 import static net.minecraftforge.fml.Logging.LOADING;
 
-public final class ModWorkManager {
+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();
 
-    public sealed interface DrivenExecutor extends Executor {
-        void drive(Runnable ticker);
-    }
-
-    private record SyncExecutor(ConcurrentLinkedDeque<Runnable> tasks) implements DrivenExecutor {
-        public SyncExecutor() {
-            this(new ConcurrentLinkedDeque<>());
+        default void drive(Runnable ticker) {
+            if (!selfDriven()) {
+                ticker.run();
+                while (true) {
+                    if (!driveOne()) break;
+                }
+            } else {
+                // park for a bit so other threads can schedule
+                LockSupport.parkNanos(PARK_TIME);
+            }
         }
+    }
+    private static class SyncExecutor implements DrivenExecutor {
+        private ConcurrentLinkedDeque<Runnable> tasks = new ConcurrentLinkedDeque<>();
 
-        private boolean driveOne() {
+        @Override
+        public boolean driveOne() {
             final Runnable task = tasks.pollFirst();
             if (task != null) {
                 task.run();
@@ -36,35 +46,44 @@ public final class ModWorkManager {
         }
 
         @Override
-        public void execute(final Runnable command) {
-            tasks.addLast(command);
+        public boolean selfDriven() {
+            return false;
         }
 
         @Override
-        public void drive(Runnable ticker) {
-            ticker.run();
-            while (true) {
-                if (!driveOne()) break;
-            }
+        public void execute(final Runnable command) {
+            tasks.addLast(command);
         }
     }
 
-    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;
+        }
+
+        @Override
+        public boolean driveOne() {
+            return false;
+        }
+
         @Override
         public void execute(final Runnable command) {
             wrapped.execute(command);
         }
-
-        @Override
-        public void drive(Runnable ticker) {
-            // Park for a bit so other threads can schedule
-            LockSupport.parkNanos(PARK_TIME);
-        }
     }
 
-    private static final SyncExecutor syncExecutor = new SyncExecutor();
+    private static SyncExecutor syncExecutor;
 
     public static DrivenExecutor syncExecutor() {
+        if (syncExecutor == null)
+            syncExecutor = new SyncExecutor();
         return syncExecutor;
     }
 
@@ -72,8 +91,14 @@ public final 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) {
@@ -84,14 +109,4 @@ public final 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;
@@ -43,7 +43,7 @@ public final class OptionalMod<T>
     private T getValue()
     {
         if (!searched) {
-            this.value = ModList.<T>getModObjectById(this.modId).orElse(null);
+            this.value = ModList.get().<T>getModObjectById(this.modId).orElse(null);
             searched = true;
         }
         return this.value;
@@ -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/ThreadSelector.java

@@ -9,8 +9,8 @@ import java.util.concurrent.Executor;
 import java.util.function.BinaryOperator;
 
 public enum ThreadSelector implements BinaryOperator<Executor> {
-    SYNC((sync, _) -> sync),
-    PARALLEL((_, parallel) -> parallel);
+    SYNC((sync, parallel) -> sync),
+    PARALLEL((sync, parallel) -> parallel);
 
     private final BinaryOperator<Executor> selector;
 

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.getModContainerById("minecraft");
-                var forge = ModList.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);
@@ -198,42 +233,52 @@ 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.getMods()) {
+        for (IModInfo info : ModList.get().getMods()) {
             if (info.getUpdateURL().isPresent())
                 ret.add(info);
         }
         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

@@ -8,8 +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.fml.loading.FMLEnvironment;
-import net.minecraftforge.fml.loading.FMLPaths;
 import org.slf4j.Logger;
 import org.slf4j.Marker;
 import org.slf4j.MarkerFactory;
@@ -18,60 +16,46 @@ import java.nio.file.Path;
 import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
 
-public final class ConfigTracker {
-    private ConfigTracker() {}
-
+public class ConfigTracker {
     private static final Logger LOGGER = LogUtils.getLogger();
     static final Marker CONFIG = MarkerFactory.getMarker("CONFIG");
-    private static final ConcurrentHashMap<String, ModConfig> FILE_MAP = new ConcurrentHashMap<>();
-    private static final Map<ModConfig.Type, Set<ModConfig>> CONFIG_SETS = Map.of(
-            ModConfig.Type.CLIENT, Collections.synchronizedSet(new LinkedHashSet<>()),
-            ModConfig.Type.COMMON, Collections.synchronizedSet(new LinkedHashSet<>()),
-            ModConfig.Type.SERVER, Collections.synchronizedSet(new LinkedHashSet<>())
-    );
-    private static final ConcurrentHashMap<String, Map<ModConfig.Type, ModConfig>> CONFIGS_BY_MOD = new ConcurrentHashMap<>();
+    public static final ConfigTracker INSTANCE = new ConfigTracker();
+    private final ConcurrentHashMap<String, ModConfig> fileMap;
+    private final EnumMap<ModConfig.Type, Set<ModConfig>> configSets;
+    private final ConcurrentHashMap<String, Map<ModConfig.Type, ModConfig>> configsByMod;
 
-    static void trackConfig(final ModConfig config) {
-        if (FILE_MAP.containsKey(config.getFileName())) {
-            LOGGER.error(CONFIG,"Detected config file conflict {} between {} and {}", config.getFileName(), FILE_MAP.get(config.getFileName()).getModId(), config.getModId());
+    private ConfigTracker() {
+        this.fileMap = new ConcurrentHashMap<>();
+        this.configSets = new EnumMap<>(ModConfig.Type.class);
+        this.configsByMod = new ConcurrentHashMap<>();
+        this.configSets.put(ModConfig.Type.CLIENT, Collections.synchronizedSet(new LinkedHashSet<>()));
+        this.configSets.put(ModConfig.Type.COMMON, Collections.synchronizedSet(new LinkedHashSet<>()));
+//        this.configSets.put(ModConfig.Type.PLAYER, new ConcurrentSkipListSet<>());
+        this.configSets.put(ModConfig.Type.SERVER, Collections.synchronizedSet(new LinkedHashSet<>()));
+    }
+
+    void trackConfig(final ModConfig config) {
+        if (this.fileMap.containsKey(config.getFileName())) {
+            LOGGER.error(CONFIG,"Detected config file conflict {} between {} and {}", config.getFileName(), this.fileMap.get(config.getFileName()).getModId(), config.getModId());
             throw new RuntimeException("Config conflict detected!");
         }
-        FILE_MAP.put(config.getFileName(), config);
-        CONFIG_SETS.get(config.getType()).add(config);
-        CONFIGS_BY_MOD.computeIfAbsent(config.getModId(), _ -> new EnumMap<>(ModConfig.Type.class)).put(config.getType(), config);
+        this.fileMap.put(config.getFileName(), config);
+        this.configSets.get(config.getType()).add(config);
+        this.configsByMod.computeIfAbsent(config.getModId(), (k)->new EnumMap<>(ModConfig.Type.class)).put(config.getType(), config);
         LOGGER.debug(CONFIG, "Config file {} for {} tracking", config.getFileName(), config.getModId());
     }
 
-    public static void loadConfigs(ModConfig.Type type, Path configBasePath) {
+    public void loadConfigs(ModConfig.Type type, Path configBasePath) {
         LOGGER.debug(CONFIG, "Loading configs type {}", type);
-        for (ModConfig config : CONFIG_SETS.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 static void unloadConfigs(ModConfig.Type type, Path configBasePath) {
+    public void unloadConfigs(ModConfig.Type type, Path configBasePath) {
         LOGGER.debug(CONFIG, "Unloading configs type {}", type);
-        for (ModConfig config : CONFIG_SETS.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 static void forceUnload() {
-        // This is how ModStateProvider handles loading configs. So we're doing the same but with unloadConfigs instead
-        if (FMLEnvironment.dist.isClient())
-            unloadConfigs(ModConfig.Type.CLIENT, FMLPaths.CONFIGDIR.get());
-
-        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);
@@ -79,7 +63,7 @@ public final 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
@@ -92,8 +76,8 @@ public final class ConfigTracker {
         }
     }
 
-    public static void loadDefaultServerConfigs() {
-        CONFIG_SETS.get(ModConfig.Type.SERVER).forEach(modConfig -> {
+    public void loadDefaultServerConfigs() {
+        configSets.get(ModConfig.Type.SERVER).forEach(modConfig -> {
             final CommentedConfig commentedConfig = CommentedConfig.inMemory();
             modConfig.getSpec().correct(commentedConfig);
             modConfig.setConfigData(commentedConfig);
@@ -101,16 +85,16 @@ public final class ConfigTracker {
         });
     }
 
-    public static String getConfigFileName(String modId, ModConfig.Type type) {
-        return Optional.ofNullable(CONFIGS_BY_MOD.getOrDefault(modId, Collections.emptyMap()).getOrDefault(type, null)).
+    public String getConfigFileName(String modId, ModConfig.Type type) {
+        return Optional.ofNullable(configsByMod.getOrDefault(modId, Collections.emptyMap()).getOrDefault(type, null)).
                 map(ModConfig::getFullPath).map(Object::toString).orElse(null);
     }
 
-    public static Map<ModConfig.Type, Set<ModConfig>> configSets() {
-        return CONFIG_SETS;
+    public Map<ModConfig.Type, Set<ModConfig>> configSets() {
+        return configSets;
     }
 
-    public static ConcurrentHashMap<String, ModConfig> fileMap() {
-        return FILE_MAP;
+    public ConcurrentHashMap<String, ModConfig> fileMap() {
+        return fileMap;
     }
 }

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;
@@ -13,7 +13,6 @@ import java.util.function.Function;
 import org.jetbrains.annotations.Nullable;
 
 public interface IConfigEvent {
-    // TODO: [FML] Get rid of this indirection somehow
     record ConfigConfig(Function<ModConfig, IConfigEvent> loading, Function<ModConfig, IConfigEvent> reloading, @Nullable Function<ModConfig, IConfigEvent> unloading) {}
 
     ConfigConfig CONFIGCONFIG = Bindings.getConfigConfiguration().get();
@@ -30,7 +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

@@ -13,6 +13,8 @@ import net.minecraftforge.fml.loading.StringUtils;
 
 import java.io.ByteArrayInputStream;
 import java.nio.file.Path;
+import java.util.Locale;
+import java.util.concurrent.Callable;
 
 public class ModConfig
 {
@@ -22,14 +24,15 @@ 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);
-        ConfigTracker.trackConfig(this);
+        this.configHandler = ConfigFileTypeHandler.TOML;
+        ConfigTracker.INSTANCE.trackConfig(this);
     }
 
     public ModConfig(final Type type, final IConfigSpec<?> spec, final ModContainer activeContainer) {
@@ -38,9 +41,8 @@ public class ModConfig
 
     private static String defaultConfigName(Type type, String modId) {
         // config file name would be "forge-client.toml" and "forge-server.toml"
-        return modId + '-' + type.extension() + ".toml";
+        return String.format(Locale.ROOT, "%s-%s.toml", modId, type.extension());
     }
-
     public Type getType() {
         return type;
     }

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

@@ -1,15 +1,14 @@
-import net.minecraftforge.gradleutils.PomUtils
-
 plugins {
-    id 'java-library'
-    id 'maven-publish'
-    id 'net.minecraftforge.licenser'
-    id 'net.minecraftforge.gradleutils'
+    id 'com.github.ben-manes.versions'
+    id 'org.javamodularity.moduleplugin' version '1.8.7' apply false
+    id 'org.cadixdev.licenser'
 }
-
-apply from: rootProject.file('build_shared.gradle')
+apply plugin: 'java-library'
+apply plugin: 'jacoco'
+apply plugin: 'org.javamodularity.moduleplugin'
 
 import org.gradle.internal.os.OperatingSystem
+
 switch (OperatingSystem.current()) {
 	case OperatingSystem.LINUX:
 		project.ext.lwjglNatives = "natives-linux"
@@ -22,18 +21,22 @@ switch (OperatingSystem.current()) {
 		break
 }
 
-java {
-    toolchain.languageVersion = JavaLanguageVersion.of(JAVA_VERSION)
-    withSourcesJar()
-}
+
+dependencyUpdates.rejectVersionIf { isNonStable(it.candidate.version) }
+
+java.withSourcesJar()
 
 dependencies {
-    compileOnly(libs.jetbrains.annotations)
+    compileOnly('org.jetbrains:annotations:23.0.0')
     implementation(project(':fmlloader'))
     implementation(project(':fmlcore'))
-    implementation(libs.bundles.lwjgl)
+    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(libs.jopt.simple)
+    implementation("net.sf.jopt-simple:jopt-simple:${JOPT_SIMPLE_VERSION}")
     testImplementation('org.junit.jupiter:junit-jupiter-api:5.8.2')
     testImplementation('org.powermock:powermock-core:2.0.9')
     testRuntimeOnly('org.junit.jupiter:junit-jupiter-engine:5.8.2')
@@ -44,49 +47,47 @@ dependencies {
     testRuntimeOnly("org.lwjgl:lwjgl-stb::$lwjglNatives")
 }
 
-tasks.named('test', Test).configure {
+test {
     useJUnitPlatform()
 }
 
-tasks.named('jar', Jar).configure {
-    manifest {
-        attributes([
-            'Automatic-Module-Name': 'net.minecraftforge.earlydisplay',
-            'Forge-Module-Layer':    'boot'
-        ] as LinkedHashMap)
-        attributes([
-            'Specification-Title':      'FML Early Display',
+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-Vendor':    'Forge Development LLC',
-            'Implementation-Version':   '1.0'
-        ] as LinkedHashMap, 'net/minecraftforge/fml/earlydisplay/')
+            '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).configureEach {
+tasks.withType(JavaCompile) {
     options.compilerArgs << '-Xlint:unchecked'
 }
 
 license {
     header = rootProject.file('LICENSE-header.txt')
+    include 'net/minecraftforge/'
 }
 
-publishing {
-    publications.register('mavenJava', MavenPublication).configure {
-        from components.java
-        artifactId = 'fmlearlydisplay'
-        pom {
-            name = project.name
-            description = 'A pretty looking, but prone to erroring screen displayed during Forge loading.'
-            url = 'https://github.com/MinecraftForge/MinecraftForge'
-            PomUtils.setGitHubDetails(pom, 'MinecraftForge')
-            license PomUtils.Licenses.LGPLv2_1
-        }
-    }
-    
-    repositories {
-        maven gradleutils.publishingForgeMaven
-    }
-}
+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;
@@ -22,10 +24,13 @@ 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.util.ArrayList;
@@ -46,6 +51,8 @@ import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.function.IntConsumer;
+import java.util.function.IntSupplier;
+import java.util.function.LongSupplier;
 import java.util.function.Supplier;
 import java.util.stream.Collector;
 import java.util.stream.Collectors;
@@ -68,7 +75,7 @@ import static org.lwjgl.opengl.GL32C.*;
  * Based on the prior ClientVisualization, with some personal touches.
  */
 public class DisplayWindow implements ImmediateWindowProvider {
-    private static final int[][] GL_VERSIONS = new int[][] {{4,6}, {4,5}, {4,4}, {4,3}, {4,2}, {4,1}, {4,0}, {3,3}};
+    private static final int[][] GL_VERSIONS = new int[][] {{4,6}, {4,5}, {4,4}, {4,3}, {4,2}, {4,1}, {4,0}, {3,3}, {3,2}};
     private static final Logger LOGGER = LoggerFactory.getLogger("EARLYDISPLAY");
     private final AtomicBoolean animationTimerTrigger = new AtomicBoolean(true);
 
@@ -83,17 +90,11 @@ public class DisplayWindow implements ImmediateWindowProvider {
     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;
@@ -112,13 +113,11 @@ 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));
@@ -133,7 +132,7 @@ 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 {
@@ -152,9 +151,10 @@ public class DisplayWindow implements ImmediateWindowProvider {
         }
         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
@@ -232,16 +232,16 @@ public class DisplayWindow implements ImmediateWindowProvider {
             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)
+                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);
@@ -261,11 +261,7 @@ 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++;
     }
@@ -290,6 +286,11 @@ 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);
         return this::periodicTick;
@@ -301,7 +302,14 @@ 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");
@@ -312,18 +320,17 @@ public class DisplayWindow implements ImmediateWindowProvider {
         LOGGER.error("ERROR DISPLAY\n"+msgBuilder);
         // we show the display on a new dedicated thread
         Executors.newSingleThreadExecutor().submit(()-> {
-            var res = TinyFileDialogs.tinyfd_messageBox("Minecraft: Forge", msgBuilder.toString(), "yesno", "error", 0);
-            if (res != 0) {
+            var res = TinyFileDialogs.tinyfd_messageBox("Minecraft: Forge", msgBuilder.toString(), "yesno", "error", false);
+            if (res) {
                 try {
                     Desktop.getDesktop().browse(URI.create(ERROR_URL));
                 } catch (IOException ioe) {
-                    TinyFileDialogs.tinyfd_messageBox("Minecraft: Forge", "Sadly, we couldn't open your browser.\nVisit " + ERROR_URL, "ok", "error", 0);
+                    TinyFileDialogs.tinyfd_messageBox("Minecraft: Forge", "Sadly, we couldn't open your browser.\nVisit " + ERROR_URL, "ok", "error", false);
                 }
             }
             System.exit(1);
         });
     }
-
     /**
      * Called to initialize the window when preparing for the Render Thread.
      *
@@ -358,15 +365,14 @@ 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) {
@@ -388,8 +394,7 @@ 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)) {
@@ -398,23 +403,11 @@ 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) {
@@ -442,9 +435,6 @@ 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);
@@ -462,19 +452,19 @@ 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);
@@ -491,6 +481,10 @@ 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;
@@ -510,7 +504,7 @@ 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);
@@ -528,7 +522,7 @@ public class DisplayWindow implements ImmediateWindowProvider {
      *
      * @return the Window we own.
      */
-    public long setupMinecraftWindow(final int width, final int height, final String title, final long monitorSupplier, final Supplier<Object> backend) {
+    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);
@@ -548,11 +542,11 @@ public class DisplayWindow implements ImmediateWindowProvider {
         var renderlockticket = false;
         do {
             try {
-                renderlockticket = renderLock.tryAcquire(100, TimeUnit.MILLISECONDS);
-                if (++tries > 9) {
-                    Thread.dumpStack();
-                    crashElegantly("We seem to be having trouble handing off the window, tried for 1 second");
-                }
+                    renderlockticket = renderLock.tryAcquire(100, TimeUnit.MILLISECONDS);
+                    if (++tries > 9) {
+                        Thread.dumpStack();
+                        crashElegantly("We seem to be having trouble handing off the window, tried for 1 second");
+                    }
             } catch (InterruptedException e) {
                 Thread.interrupted();
             }
@@ -562,7 +556,7 @@ public class DisplayWindow implements ImmediateWindowProvider {
 
         glfwMakeContextCurrent(window);
         // Set the title to what the game wants
-        glfwSetWindowTitle(window, title);
+        glfwSetWindowTitle(window, title.get());
         glfwSwapInterval(0);
         // Clean up our hooks
         glfwSetFramebufferSizeCallback(window, null).free();
@@ -602,25 +596,10 @@ 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();
+        loadingOverlay = Arrays.stream(clz.getMethods()).filter(m-> Modifier.isStatic(m.getModifiers()) && m.getName().equals("newInstance")).findFirst().orElseThrow();
     }
 
     public int getFramebufferTextureId() {
@@ -638,7 +617,8 @@ 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

@@ -13,25 +13,26 @@ 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 final MemoryMXBean memoryBean;
 
-    private float memory;
+    float memory;
     private String text;
 
     PerformanceInfo() {
         showCPUUsage = FMLConfig.getBoolConfigValue(FMLConfig.ConfigValue.EARLY_WINDOW_SHOW_CPU);
         osBean = showCPUUsage ? ManagementFactory.getPlatformMXBean(OperatingSystemMXBean.class) : null;
+        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);
+            text = "Heap: %d/%d MB (%.1f%%) OffHeap: %d MB".formatted(heapusage.getUsed() >> 20, heapusage.getMax() >> 20, memory * 100.0, memoryBean.getNonHeapMemoryUsage().getUsed() >> 20);
             return;
         }
 
@@ -43,7 +44,7 @@ public class PerformanceInfo {
             cpuText = "CPU: %.1f%%".formatted(cpuLoad * 100f);
         }
 
-        text = "Memory: %d/%dMB (%.1f%%)  %s".formatted(heapusage.getUsed() >>> 20, heapusage.getMax() >>> 20, memory * 100f, cpuText);
+        text = "Heap: %d/%d MB (%.1f%%) OffHeap: %d MB  %s".formatted(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) {
@@ -38,9 +38,6 @@ public class RenderElement {
     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> {}
 
@@ -59,18 +56,11 @@ 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 +75,7 @@ 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 +84,19 @@ 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;
@@ -116,7 +116,7 @@ public class RenderElement {
     }
 
     public static RenderElement forgeVersionOverlay(SimpleFont font, String version) {
-        return new RenderElement(RenderElement.initializeText(font, (bb, _, ctx)->
+        return new RenderElement(RenderElement.initializeText(font, (bb, fnt, ctx)->
                 font.generateVerticesForTexts(ctx.scaledWidth() - font.stringWidth(version) - 10,
                         ctx.scaledHeight() - font.lineSpacing() + font.descent() - 10, bb,
                         new SimpleFont.DisplayText(version, ctx.colourScheme.foreground().packedint(RenderElement.globalAlpha)))));
@@ -148,11 +148,11 @@ 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) {
@@ -178,19 +178,19 @@ public class RenderElement {
         var colour = (alpha << 24) | 0xFFFFFF;
         Renderer bar;
         if (pm.steps() == 0) {
-            bar = progressBar(ctx->new int[] {(ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y + font.lineSpacing() - font.descent(), BAR_WIDTH * ctx.scale()}, _->colour, frame -> indeterminateBar(frame, cnt == 0));
+            bar = progressBar(ctx->new int[] {(ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y + font.lineSpacing() - font.descent(), BAR_WIDTH * ctx.scale()}, f->colour, frame -> indeterminateBar(frame, cnt == 0));
         } else {
-            bar = progressBar(ctx -> new int[]{(ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y + font.lineSpacing() - font.descent(), BAR_WIDTH * ctx.scale()}, _ -> colour, _ -> new float[]{0f, pm.progress()});
+            bar = progressBar(ctx -> new int[]{(ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y + font.lineSpacing() - font.descent(), BAR_WIDTH * ctx.scale()}, f -> colour, f -> new float[]{0f, pm.progress()});
         }
-        Renderer label = (bb, ctx, _) -> renderText(font, text((ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y, pm.label().getText(), colour), bb, ctx);
+        Renderer label = (bb, ctx, frame) -> renderText(font, text((ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y, pm.label().getText(), colour), bb, ctx);
         return bar.then(label);
     }
     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)};
         }
     }
 
@@ -198,9 +198,9 @@ public class RenderElement {
         var y = 10 * context.scale();
         PerformanceInfo pi = context.performance();
         final int colour = hsvToRGB((1.0f - (float)Math.pow(pi.memory(), 1.5f)) / 3f, 1.0f, 0.5f);
-        var bar = progressBar(ctx -> new int[]{(ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y, BAR_WIDTH * ctx.scale()}, _ -> colour, _ -> new float[]{0f, pi.memory()});
+        var bar = progressBar(ctx -> new int[]{(ctx.scaledWidth() - BAR_WIDTH * ctx.scale()) / 2, y, BAR_WIDTH * ctx.scale()}, f -> colour, f -> new float[]{0f, pi.memory()});
         var width = font.stringWidth(pi.text());
-        Renderer label = (bb, ctx, _) -> renderText(font, text(ctx.scaledWidth() / 2 - width / 2, y + 18, pi.text(), context.colourScheme.foreground().packedint(globalAlpha)), bb, ctx);
+        Renderer label = (bb, ctx, frame) -> renderText(font, text(ctx.scaledWidth() / 2 - width / 2, y + 18, pi.text(), context.colourScheme.foreground().packedint(globalAlpha)), bb, ctx);
         bar.then(label).accept(buffer, context, frameNumber);
     }
 
@@ -249,8 +249,8 @@ public class RenderElement {
         };
     }
 
-    private static Renderer initializeText(SimpleFont font, TextGenerator textGenerator) {
-        return (bb, context, _) -> 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) {
@@ -262,15 +262,16 @@ public class RenderElement {
     }
 
     private static TextGenerator text(int x, int y, String text, int colour) {
-        return (bb, font, _) -> font.generateVerticesForTexts(x, y, bb, new SimpleFont.DisplayText(text, 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 +281,21 @@ 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 Math.min(num, max);
+        }
     }
 
     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 Math.min(num, max);
+        }
     }
 
     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

@@ -1,146 +1,97 @@
-import net.minecraftforge.gradleutils.PomUtils
-
 plugins {
-    id 'java-library'
-    id 'maven-publish'
-    id 'net.minecraftforge.licenser'
-    id 'net.minecraftforge.gradleutils'
-    alias(libs.plugins.apt)
+    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'
 
-apply from: rootProject.file('build_shared.gradle')
-
+dependencyUpdates.rejectVersionIf { isNonStable(it.candidate.version) }
 configurations.forEach{ it.transitive = false }
 
 dependencies {
-    compileOnly(libs.jetbrains.annotations)
+    compileOnly("org.jetbrains:annotations:${JETBRAINS_ANNOTATIONS_VERSION}")
 
-    api(libs.bundles.asm) // Needed by all the black magic
-    api(libs.forgespi)
-    api(libs.mergetool.api)
-    api(libs.log4j.api)
-    api(libs.slf4j.api)
-    api(libs.guava)
-    api(libs.gson)
-    api(libs.maven.artifact)
-    api(libs.apache.commons)
-    api(libs.bundles.night.config)
-    api(libs.modlauncher)
-    api(libs.mojang.logging)
-    api(libs.jarjar.selector)
-    api(libs.jarjar.meta)
+    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(libs.jopt.simple)
-    implementation(libs.securemodules)
-    implementation(libs.accesstransformers)
-    implementation(libs.terminalconsoleappender)
-    implementation(libs.jimfs)
-    implementation(libs.roimfs)
+    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}")
 
-    // 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)
-    annotationProcessor(libs.bundles.log4j)
+    implementation("org.apache.logging.log4j:log4j-core:${LOG4J_VERSION}")
+    annotationProcessor("org.apache.logging.log4j:log4j-core:${LOG4J_VERSION}")
 
-    testCompileOnly(libs.jetbrains.annotations)
-    testRuntimeOnly(libs.bootstrap)
+    testCompileOnly("org.jetbrains:annotations:${JETBRAINS_ANNOTATIONS_VERSION}")
+    testRuntimeOnly("cpw.mods:bootstraplauncher:${BOOTSTRAPLAUNCHER_VERSION}")
 }
 
-java {
-    toolchain.languageVersion = JavaLanguageVersion.of(JAVA_VERSION)
-    withSourcesJar()
+task sourcesJar(type: Jar) {
+    archiveClassifier = 'sources'
+    from sourceSets.main.allSource
 }
 
-tasks.named('jar', Jar).configure {
-    manifest {
-        attributes([
-            'Automatic-Module-Name': 'net.minecraftforge.fmlloader',
-            'Forge-Module-Layer':    'boot'
-        ] as LinkedHashMap)
-        attributes([
-            'Specification-Title':   'FMLLoader',
-            'Specification-Vendor':  'Forge Development LLC',
-            'Specification-Version': '1',
-            'Implementation-Title':  'FMLLoader',
-            'Implementation-Vendor': 'Forge Development LLC',
-            'Implementation-Version': FORGE_VERSION
-        ] as LinkedHashMap, 'net/minecraftforge/fml/loading/')
+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).configureEach {
-    options.compilerArgs << '-Xlint:unchecked'
+tasks.withType(JavaCompile) {
+    options.compilerArgs << '-Xlint:-unchecked'
 }
 
 license {
     header = rootProject.file('LICENSE-header.txt')
+
+    include 'net/minecraftforge/'
 }
 
-publishing {
-    publications.register('mavenJava', MavenPublication).configure {
-        from components.java
-        artifactId = 'fmlloader'
-        pom {
-            name = project.name
-            description = 'Modifactions to Minecraft to enable mod developers.'
-            url = 'https://github.com/MinecraftForge/MinecraftForge'
-            PomUtils.setGitHubDetails(pom, 'MinecraftForge')
-            license PomUtils.Licenses.LGPLv2_1
-        }
-    }
-
-    repositories {
-        maven gradleutils.publishingForgeMaven
-    }
+artifacts {
+    archives jar
+    archives sourcesJar
 }
 
-tasks.register('writeForgeVersionJson') {
-    doLast {
-        file('src/main/resources/forge_version.json').json = [
-            forge: FORGE_VERSION,
-            mc: MC_VERSION,
-            mcp: MCP_VERSION
-        ]
-    }
-}
-
-tasks.register('jarJarOptionsJson', net.minecraftforge.forge.tasks.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').configure {
-    dependsOn('eclipseJdt')
-    dependsOn('eclipseJdtApt')
-    dependsOn('eclipseFactorypath')
-    dependsOn('writeForgeVersionJson')
-    dependsOn('jarJarOptionsJson')
-}
-
-tasks.named('sourcesJar') {
-    dependsOn('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.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

@@ -38,12 +38,12 @@ public class FMLConfig
         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"),
         ;
 
         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 +53,7 @@ public class FMLConfig
             this.entry = entry;
             this.defaultValue = defaultValue;
             this.comment = comment;
+            this.valueType = defaultValue.getClass();
             this.entryFunction = entryFunction;
         }
 
@@ -109,7 +110,7 @@ public class FMLConfig
         }
         if (!configSpec.isCorrect(configData)) {
             LOGGER.warn(CORE, "Configuration file {} is not correct. Correcting", configFile);
-            configSpec.correct(configData, (_, path, incorrectValue, correctedValue) ->
+            configSpec.correct(configData, (action, path, incorrectValue, correctedValue) ->
                     LOGGER.info(CORE, "Incorrect key {} was corrected from {} to {}", path, incorrectValue, correctedValue));
         }
         configData.putAllComments(configComments);

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

@@ -20,8 +20,8 @@ public class FMLEnvironment
     public static final boolean secureJarsEnabled = FMLLoader.isSecureJarEnabled();
 
     static void setupInteropEnvironment(IEnvironment environment) {
-        environment.computePropertyIfAbsent(IEnvironment.Keys.NAMING.get(), _->naming);
-        environment.computePropertyIfAbsent(Environment.Keys.DIST.get(), _->dist);
+        environment.computePropertyIfAbsent(IEnvironment.Keys.NAMING.get(), v->naming);
+        environment.computePropertyIfAbsent(Environment.Keys.DIST.get(), v->dist);
     }
 
     public static class Keys {

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

@@ -8,36 +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 final 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;
@@ -46,73 +54,80 @@ public final 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);
@@ -122,58 +137,85 @@ public final 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);
     }
 
     public static List<ITransformationService.Resource> completeScan(IModuleLayerManager layerManager) {
         moduleLayerManager = layerManager;
-        LanguageLoadingProvider.reload();
+        languageLoadingProvider = new LanguageLoadingProvider();
         backgroundScanHandler = modValidator.stage2Validation();
+        loadingModList = backgroundScanHandler.getLoadingModList();
         return List.of(modValidator.getModResources());
     }
 
+    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 Path getGamePath() {
+    public static LoadingModList getLoadingModList()
+    {
+        return loadingModList;
+    }
+
+    public static Path getGamePath()
+    {
         return gamePath;
     }
 
@@ -190,7 +232,7 @@ public final 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

@@ -7,30 +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";
     }
 
@@ -41,7 +64,16 @@ public class FMLServiceProvider implements ITransformationService {
         LOGGER.debug(CORE, "Loading configuration");
         FMLConfig.load();
         LOGGER.debug(CORE, "Preparing ModFile");
-        environment.computePropertyIfAbsent(Environment.Keys.MODFILEFACTORY.get(), _->ModFile::new);
+        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);
@@ -60,13 +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"))
@@ -51,8 +50,8 @@ public class ImmediateWindowHandler {
         earlyProgress.label("Bootstrapping Minecraft");
     }
 
-    public static long setupMinecraftWindow(final int width, final int height, final String title, final long monitor, final Supplier<Object> backend) {
-        return provider.setupMinecraftWindow(width, height, title, monitor, backend);
+    public static long setupMinecraftWindow(final IntSupplier width, final IntSupplier height, final Supplier<String> title, final LongSupplier monitor) {
+        return provider.setupMinecraftWindow(width, height, title, monitor);
     }
 
     public static boolean positionWindow(Optional<Object> monitor,IntConsumer widthSetter, IntConsumer heightSetter, IntConsumer xSetter, IntConsumer ySetter) {
@@ -104,9 +103,9 @@ public class ImmediateWindowHandler {
         }
 
         @Override
-        public long setupMinecraftWindow(final int width, final int height, final String title, final long monitor, final Supplier<Object> backend) {
+        public long setupMinecraftWindow(final IntSupplier width, final IntSupplier height, final Supplier<String> title, final LongSupplier monitor) {
             try {
-                var longsupplier = (LongSupplier)NV_HANDOFF.invoke(null, width, height, title, monitor, backend);
+                var longsupplier = (LongSupplier)NV_HANDOFF.invoke(null, width, height, title, monitor);
                 return longsupplier.getAsLong();
             } catch (Throwable e) {
                 throw new IllegalStateException("How did you get here?", e);
@@ -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/ImmediateWindowProvider.java

@@ -8,6 +8,8 @@ package net.minecraftforge.fml.loading;
 import java.util.Optional;
 import java.util.function.Consumer;
 import java.util.function.IntConsumer;
+import java.util.function.IntSupplier;
+import java.util.function.LongSupplier;
 import java.util.function.Supplier;
 
 /**
@@ -64,7 +66,7 @@ public interface ImmediateWindowProvider {
      * @param monitor This is the monitor it should appear on.
      * @return The window id
      */
-    long setupMinecraftWindow(final int width, final int height, final String title, final long monitor, final Supplier<Object> backend);
+    long setupMinecraftWindow(final IntSupplier width, final IntSupplier height, final Supplier<String> title, final LongSupplier monitor);
 
     /**
      * This is called after window handoff to allow us to tell Mojang about our window's position. This might give a

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

@@ -7,18 +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.ServiceConfigurationError;
+import java.util.Map;
+import java.util.Optional;
 import java.util.ServiceLoader;
 import java.util.function.Consumer;
 import java.util.function.Function;
@@ -27,90 +36,115 @@ import java.util.stream.Stream;
 import static net.minecraftforge.fml.loading.LogMarkers.CORE;
 import static net.minecraftforge.fml.loading.LogMarkers.LOADING;
 
-public final class LanguageLoadingProvider {
-    public static void forEach(Consumer<IModLanguageProvider> consumer) {
-        providers.forEach(consumer);
+public class LanguageLoadingProvider
+{
+    private static final Logger LOGGER = LogUtils.getLogger();
+    private final List<IModLanguageProvider> languageProviders = new ArrayList<>();
+    private final ServiceLoader<IModLanguageProvider> serviceLoader;
+    private final Map<String, ModLanguageWrapper> languageProviderMap = new HashMap<>();
+    private List<Path> languagePaths = new ArrayList<>();
+
+    public void forEach(final Consumer<IModLanguageProvider> consumer)
+    {
+        languageProviders.forEach(consumer);
     }
 
-    public static <T> Stream<T> applyForEach(Function<IModLanguageProvider, T> function) {
-        return providers.stream().map(function);
+    public <T> Stream<T> applyForEach(final Function<IModLanguageProvider, T> function) {
+        return languageProviders.stream().map(function);
     }
 
-    public static void reload() {
+    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(IModuleLayerManager.Layer.PLUGIN)).orElseThrow();
+        serviceLoader = ServiceLoader.load(sl, IModLanguageProvider.class);
+        loadLanguageProviders();
+    }
+    private void loadLanguageProviders() {
+        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");
+        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)));
+        });
+    }
+
+    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");
+        }
+    }
+
+    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);
+    }
+
+    public void addAdditionalLanguages(List<ModFile> modFiles)
+    {
+        if (modFiles==null) return;
+        Stream<Path> langPaths = modFiles.stream().map(ModFile::getFilePath);
+        addLanguagePaths(langPaths);
+        serviceLoader.reload();
         loadLanguageProviders();
     }
 
-    /*==========================================================================*
-     *                        INTERNAL                                          *
-     *==========================================================================*/
-    private static final Logger LOGGER = LogUtils.getLogger();
-    private static final ServiceLoader<IModLanguageProvider> serviceLoader;
-    private static final ArrayList<IModLanguageProvider> providers = new ArrayList<>();
-    private static final HashMap<String, Wrapper> providersByName = new HashMap<>();
-    private static final DefaultArtifactVersion IN_DEV = new DefaultArtifactVersion("0.0-dev");
-
-    private record Wrapper(ArtifactVersion version, IModLanguageProvider service) {}
-
-    static {
-        var sl = Launcher.INSTANCE.environment().findModuleLayerManager().flatMap(lm -> lm.getLayer(Layer.PLUGIN)).orElseThrow();
-        serviceLoader = ServiceLoader.load(sl, IModLanguageProvider.class);
+    Stream<Path> getLibraries() {
+        return languagePaths.stream();
     }
 
-    private static 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());
-            }
+    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())));
         }
 
-        LOGGER.debug(CORE, "Found {} language providers", providers.size());
-
-        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());
-            }
-
-            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));
-        }
-    }
-
-    public static IModLanguageProvider findLanguage(ModFile mod, String language, VersionRange versionRange) {
-        var consumer = mod.getFileName();
-        var wrapper = providersByName.get(language);
-
-        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));
-        }
-
-        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

@@ -5,46 +5,167 @@
 
 package net.minecraftforge.fml.loading;
 
+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 org.jetbrains.annotations.Nullable;
 
+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;
 
-/// Master list of all mods in the loading context
-public sealed interface LoadingModList permits LoadingModListImpl {
-    static ModFileInfo getModFileById(String modId) {
-        return get().fileById().get(modId);
+/**
+ * Master list of all mods <em>in the loading context. This class cannot refer outside the
+ * loading package</em>
+ */
+public class LoadingModList
+{
+    private static LoadingModList INSTANCE;
+    private final List<ModFileInfo> modFiles;
+    private final List<ModInfo> sortedList;
+    private final Map<String, ModFileInfo> fileById;
+    private final List<EarlyLoadingException> preLoadErrors;
+    private List<IModFile> brokenFiles;
+
+    private LoadingModList(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(ModFileInfo::getMods)
+                .flatMap(Collection::stream)
+                .map(ModInfo.class::cast)
+                .collect(Collectors.toMap(ModInfo::getModId, ModInfo::getOwningFile));
+        this.preLoadErrors = new ArrayList<>();
     }
 
-    static List<ModFileInfo> getModFiles() {
-        return get().getModFiles();
+    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;
     }
 
-    static List<ModInfo> getMods() {
-        return get().getMods();
+    public static LoadingModList get() {
+        return INSTANCE;
+    }
+    public void addCoreMods()
+    {
+        modFiles.stream()
+                .map(ModFileInfo::getFile)
+                .map(ModFile::getCoreMods)
+                .flatMap(List::stream)
+                .forEach(FMLLoader.getCoreModProvider()::addCoreMod);
     }
 
-    static @Nullable Path findResource(String className) {
-        for (ModFileInfo modFileInfo : get().getModFiles()) {
-            Path resource = modFileInfo.getFile().findResource(className);
+    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()
+    {
+        return modFiles;
+    }
+
+    public Path findResource(final String className)
+    {
+        for (ModFileInfo mf : modFiles) {
+            final Path resource = mf.getFile().findResource(className);
             if (Files.exists(resource)) return resource;
         }
         return null;
     }
 
-    static List<EarlyLoadingException> getErrors() {
-        return get().getErrors();
+    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;
+            }
+        };
     }
 
-    static List<IModFile> getBrokenFiles() {
-        return get().getBrokenFiles();
+    public ModFileInfo getModFileById(String modid)
+    {
+        return this.fileById.get(modid);
     }
 
-    private static LoadingModListImpl get() {
-        return LoadingModListImpl.get();
+    public List<ModInfo> getMods()
+    {
+        return this.sortedList;
+    }
+
+    public List<EarlyLoadingException> getErrors() {
+        return preLoadErrors;
+    }
+
+    public void setBrokenFiles(final List<IModFile> brokenFiles) {
+        this.brokenFiles = brokenFiles;
+    }
+
+    public List<IModFile> getBrokenFiles() {
+        return this.brokenFiles;
     }
 }

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

@@ -1,90 +0,0 @@
-/*
- * Copyright (c) Forge Development LLC and contributors
- * SPDX-License-Identifier: LGPL-2.1-only
- */
-
-package net.minecraftforge.fml.loading;
-
-import net.minecraftforge.fml.loading.EarlyLoadingException.ExceptionData;
-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.nio.file.Files;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-import java.util.Map;
-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>
- */
-record LoadingModListImpl(
-        List<ModFileInfo> getModFiles,
-        List<ModInfo> getMods,
-        Map<String, ModFileInfo> fileById,
-        ArrayList<EarlyLoadingException> getErrors,
-        ArrayList<IModFile> getBrokenFiles
-) implements LoadingModList {
-    private static final Logger LOGGER = LogUtils.getLogger();
-    private static ModSorter.State temp;
-
-    LoadingModListImpl(List<ModFile> modFiles, List<ModInfo> sortedList) {
-        var modFileInfos = modFiles.stream()
-                .map(ModFile::getModFileInfo)
-                .map(ModFileInfo.class::cast)
-                .toList();
-        sortedList = sortedList.stream().toList();
-        var fileById = modFileInfos.stream()
-                .map(ModFileInfo::getMods)
-                .flatMap(Collection::stream)
-                .map(ModInfo.class::cast)
-                .collect(Collectors.toUnmodifiableMap(ModInfo::getModId, ModInfo::getOwningFile));
-        this(modFileInfos, sortedList, fileById, new ArrayList<>(), new ArrayList<>());
-    }
-
-    static LoadingModListImpl init(ModSorter.State modSorterState, EarlyLoadingException earlyLoadingException) {
-        temp = modSorterState;
-        var instance = get();
-        if (earlyLoadingException != null)
-            instance.getErrors.add(earlyLoadingException);
-        temp = null;
-        instance.addAccessTransformers();
-        return instance;
-    }
-
-    static LoadingModListImpl get() {
-        final class LazyInit {
-            private LazyInit() {}
-            private static final LoadingModListImpl INSTANCE
-                    = new LoadingModListImpl(LoadingModListImpl.temp.files(), LoadingModListImpl.temp.mods());
-        }
-        return LazyInit.INSTANCE;
-    }
-
-    private void addAccessTransformers() {
-        var errors = new ArrayList<ExceptionData>();
-
-        for (ModFileInfo modFile : getModFiles) {
-            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())
-            getErrors.add(new EarlyLoadingException("Invalid Access Transformers", null, errors));
-    }
-}

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

@@ -7,6 +7,7 @@ package net.minecraftforge.fml.loading;
 
 import com.mojang.logging.LogUtils;
 import cpw.mods.modlauncher.api.INameMappingService;
+import org.apache.commons.lang3.tuple.Pair;
 import org.slf4j.Logger;
 
 import java.io.BufferedReader;
@@ -35,7 +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
@@ -76,7 +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

@@ -6,6 +6,7 @@
 package net.minecraftforge.fml.loading;
 
 import java.nio.file.Path;
+import java.nio.file.Paths;
 
 /**
  * Convert a maven coordinate into a Path.
@@ -33,7 +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]);
         }