Cleanroom Minecraft

Features

Implemented

• 1.12.2 on Java 21
• LWJGL3
• A working mod development template/kit
• Patches for loading incompatible mods
• Built-in Mixin

Planning

• CleanroomGradle to replace ForgeGradle
• No more Late and Early mixin
• Classfile API
• Scala 3 + Kotlin 2
• Actually useful APIs (See here)
• Optimized
• Compatibility

Components:

• Minecraft Coder Pack
• CleanroomLoader (Continuation + Revamp of ForgeModLoader)
• Cleanroom Minecraft (Continuation + Revamp of MinecraftForge)
• Mixin (Coming Soon)
• Bytecode Patcher (Coming Soon) [Inspired by Bansoukou and Bytecode Patcher]
• Fugue, a mod patches many incompatibilities. (temporary)
• Scalar, a Scala provider. We made Scala libraries become a standalone mod so it can be updated.

Download & Installation:

• For MultiMC-based launchers (PolyMC, PrismLauncher), go to CleanroomMMC's action page, download the latest build (Note: Login first!) and import it in your launcher(alternatively unzip patches and json inside to your 1.12 instance).
• For regular launcher (official launcher, AT launcher, FTB, HMCL), go to Cleanroom's action page, click the latest action marked as Build and Upload Test Artifact and download (Note: Login first!) the installer artifact. You could use the installer like the Forge one.
• Remember to install Fugue!
• And Scalar! (experimental branch only)

Build Instructions:

1. Clone this repository
2. Import the build.gradle into your IDE (most preferably IntelliJ IDEA)
3. Once the import has finished, run gradlew setup
4. Build with gradlew build

Development Tips:

• Only modify projects/cleanroom/src/ directory if you want to change vanilla
• Run gradlew genPatches before commit, or the changes won't exist
• Modifications on src/ doesn't need generating patches
• Tips from Forge are still apply, keep the patches clean!
• The current patches is full of useless hunks after we switched to VineFlower, we encourage contributors to manual clean up their patches

Mod Development:

There's an unofficial template exist. Note: You need to build before run.

A porting guide is available in Cleanroom wiki.

Roadmap flow chart

graph TD;
    A(Mixin integration)-->D(Bouncepad overhaul - we are here);
    B(LWJGL compat)-->D;
    C(Newer Java compat)-->D;
    D-->E(Config any time);
    D-->G(Minor improvement and fixes)
    E-->F(Greater improvement needs configs)
    X(Cleanroom Gradle)-->D
    D-->X
    D-->Y(Better Mixin Integration)
    Y-->D