Hello everyone, it's been a while. Forge now uses official Mojang mappings, and so should you if you wish to bring your Forge codebase to Fabric. Nevertheless, this tool should work, but I won't be updating it.

YarnForge Gradle plugin

A Forge specific Gradle plugin to remap its sources to Yarn. If your project is using any version of ForgeGradle 3, make sure to switch to the FG_3.0 tag. Although the following says Yarn, you can use anything but Mojang mappings as long as it is usable by fabric-loom

Setup

1. Clone this repo
2. In the target project's build.gradle add the following repositories to the buildscript block
   • https://oss.sonatype.org/content/groups/public/
   • https://maven.fabricmc.net/

   maven { url = uri("https://oss.sonatype.org/content/groups/public/") }
   maven { url = uri("https://maven.fabricmc.net/") }
   

3. In the target project's build.gradle add the following to the buildscript dependencies

   classpath("me.ramidzkh:yarnforge-plugin")
   

4. Apply the yarnforge-plugin plugin after Forge's plugin is applied

   apply(plugin: "yarnforge-plugin")
   

Usage for user mods

./gradlew --include-build <location to where you cloned yarnforge> userRemapYarn --mappings net.fabricmc:yarn:<yarn version> --mc-version <mc version> --no-daemon

• Add --mixin for Mixin support
• Make sure at least 1GB of RAM has been assigned to gradle. This should have been done by default already.
• --no-daemon is extremely important or gradle will leak memory until you run daemon --stop!

Usage for Forge itself (as in https://github.com/MinecraftForge/MinecraftForge)

./gradlew --include-build <location to where you cloned yarnforge> clean setup forgeRemapYarn --mappings net.fabricmc:yarn:<yarn version> --mc-version <mc version> --no-daemon

• Assign at least 3GB of RAM to Gradle. If you're starved for RAM, 2GB will usually work but will be slightly slower.
• Add --skip-clean to skip remapping the clean source set
• --no-daemon is extremely important or gradle will leak over a gig of memory until you run daemon --stop!
• The remapped/clean and remapped/patched directories contain Minecraft code, so be careful of publishing those

License

Apache 2.0