MCPConfig VS fernflower

forge takes the jar as released by mojang, does a couple preprocessing tasks (renaming everything away from meaningless proguard names, merging the client and server .jars, etc), then decompiles it with forgeflower, applies a large number of source-level diffs to the decompiler output to account for deficiencies in the decompiler that cause the output to be mostly correct but not exactly recompilable, applies another set of source-level diffs to produce a jar augmented with the fun stuff that the forge project wants, recompiles this source, then writes the forge modloader against that. (actual mods are written against the modloader and patched minecraft as well, modders cannot write their own source patches, only forge itself has source patches.)

Java: 16.0.2 JVM: 16.0.2+7(Eclipse Foundation) Arch: amd64 WARNING: This project is configured to use the official obfuscation mappings provided by Mojang. These mapping fall under their associated license, you should be fully aware of this license. For the lat est license text, refer below, or the reference copy here: https://github.com/MinecraftForge/MCPConfig/blob/master/Mojang.md, You can hide this warning by running the `hideOfficialWarningUntilChanged` t ask WARNING: (c) 2020 Microsoft Corporation. These mappings are provided "as-is" and you bear the risk of using them. You may copy and use the mappings for development purposes, but you may not redistribute the mappings complete and unmodified. Microsoft makes no warranties, express or implied, with respect to the mappings provided here. Use and modification of this document or the source code (in any fo rm) of Minecraft: Java Edition is governed by the Minecraft End User License Agreement available at https://account.mojang.com/documents/minecraft_eula. java.lang.IllegalStateException: Could not find tools.jar. Please check that C:\Program Files\Java\jre1.8.0_301 contains a valid JDK installation. at org.gradle.api.internal.tasks.compile.JdkTools.(JdkTools.java:77) at org.gradle.api.internal.tasks.compile.JavaHomeBasedJavaCompilerFactory.createJdkTools(JavaHomeBasedJavaCompilerFactory.java:48) at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(Unknown Source) at org.gradle.api.internal.tasks.compile.JavaHomeBasedJavaCompilerFactory.create(JavaHomeBasedJavaCompilerFactory.java:43) at org.gradle.api.internal.tasks.compile.JavaHomeBasedJavaCompilerFactory.create(JavaHomeBasedJavaCompilerFactory.java:29) at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.createCompileTask(JdkJavaCompiler.java:63) at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:53) at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:39) at org.gradle.api.internal.tasks.compile.daemon.AbstractDaemonCompiler$CompilerWorkAction.execute(AbstractDaemonCompiler.java:135) at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63) at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:49) at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:43) at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:97) at org.gradle.workers.internal.AbstractClassLoaderWorker.executeInClassLoader(AbstractClassLoaderWorker.java:43) at org.gradle.workers.internal.FlatClassLoaderWorker.run(FlatClassLoaderWorker.java:32) at org.gradle.workers.internal.FlatClassLoaderWorker.run(FlatClassLoaderWorker.java:22) at org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:85) at org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:55) at org.gradle.process.internal.worker.request.WorkerAction$1.call(WorkerAction.java:138) at org.gradle.process.internal.worker.child.WorkerLogEventListener.withWorkerLoggingProtocol(WorkerLogEventListener.java:41) at org.gradle.process.internal.worker.request.WorkerAction.run(WorkerAction.java:135) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56) at java.lang.Thread.run(Unknown Source) java.lang.IllegalStateException: Could not find tools.jar. Please check that C:\Program Files\Java\jre1.8.0_301 contains a valid JDK installation. at org.gradle.api.internal.tasks.compile.JdkTools.(JdkTools.java:77) at org.gradle.api.internal.tasks.compile.JavaHomeBasedJavaCompilerFactory.createJdkTools(JavaHomeBasedJavaCompilerFactory.java:48) at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(Unknown Source) at org.gradle.api.internal.tasks.compile.JavaHomeBasedJavaCompilerFactory.create(JavaHomeBasedJavaCompilerFactory.java:43) at org.gradle.api.internal.tasks.compile.JavaHomeBasedJavaCompilerFactory.create(JavaHomeBasedJavaCompilerFactory.java:29) at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.createCompileTask(JdkJavaCompiler.java:63) at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:53) at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:39) at org.gradle.api.internal.tasks.compile.daemon.AbstractDaemonCompiler$CompilerWorkAction.execute(AbstractDaemonCompiler.java:135) at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63) at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:49) at org.gradle.workers.internal.AbstractClassLoaderWorker$1.create(AbstractClassLoaderWorker.java:43) at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:97) at org.gradle.workers.internal.AbstractClassLoaderWorker.executeInClassLoader(AbstractClassLoaderWorker.java:43) at org.gradle.workers.internal.FlatClassLoaderWorker.run(FlatClassLoaderWorker.java:32) at org.gradle.workers.internal.FlatClassLoaderWorker.run(FlatClassLoaderWorker.java:22) at org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:85) at org.gradle.workers.internal.WorkerDaemonServer.run(WorkerDaemonServer.java:55) at org.gradle.process.internal.worker.request.WorkerAction$1.call(WorkerAction.java:138) at org.gradle.process.internal.worker.child.WorkerLogEventListener.withWorkerLoggingProtocol(WorkerLogEventListener.java:41) at org.gradle.process.internal.worker.request.WorkerAction.run(WorkerAction.java:135) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36) at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:182) at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:164) at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:414) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56) at java.lang.Thread.run(Unknown Source) FAILURE: Build failed with an exception. * What went wrong: Could not resolve all files for configuration ':runtimeClasspathCopy'. > Could not find net.minecraftforge:forge:1.16.5-36.2.2_mapped_official_1.16.5. Searched in the following locations: - file:/C:/Users/memjk/.gradle/caches/forge_gradle/bundeled_repo/net/minecraftforge/forge/1.16.5-36.2.2_mapped_official_1.16.5/forge-1.16.5-36.2.2_mapped_official_1.16.5.pom - file:/C:/Users/memjk/.gradle/caches/forge_gradle/bundeled_repo/net/minecraftforge/forge/1.16.5-36.2.2_mapped_official_1.16.5/forge-1.16.5-36.2.2_mapped_official_1.16.5.jar Required by: project :

See our official updated thoughts on it: https://github.com/MinecraftForge/MCPConfig/blob/master/Mojang.md Forge uses the mojmaps in our repository, and it is the default for MDKs. Be mindful of the terms of the license, but we don't believe there is any danger to using it.

Hello! Today I'm happy to announce the release of a project that me and my friends have been working on over the course of the last year, Quiltflower! Originally intended just for use with the QuiltMC toolchain with Minecraft, Quiltflower quickly expanded to be a general purpose java decompiler aiming to create code that is as accurate and clean as possible. If the name sounds familiar it's because Quiltflower is a fork of Fernflower, the (in)famous decompiler that was developed by Stiver, maintained by Jetbrains, and became the default decompiler in Intellij IDEA. Fernflower also quickly found its way into many other tools. After many frustrations with it myself with its decompiled code structuring and quality I decided to do something about it, and here we are! Over the past year, Quiltflower has added support for features such as modern string concatenation, a code formatter, sealed classes, pattern matching, switch expressions, and try-with-resources, and more. Quiltflower also focuses on the code quality of the decompiled output, and takes readability very seriously. We'd greatly appreciate it if you'd give it a try, with our Intellij Plugin or as a standalone jar. While it has come a long way it's still a work in progress, and feedback can be reported on our issue tracker.

You can decompile the classes into .java sourcecode using Fernflower and store that to disk, then use the Attach Sources option to add it to the binary dependency you're using. This allows you to edit the source freely for your reference while continuing to use the original binary.