Patchwork Patcher is a set of tools for transforming and patching Forge mod jars into jars that are directly loadable by Fabric Loader. It does the following things currently:
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Remaps Minecraft from official (proguard's obfuscated names) to srg (MCP's runtime mappings)
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Remaps the mod jar from srg to official using Tiny Remapper with the srg minecraft jar on the classpath
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Remaps the mod jar from official to intermediary using Tiny Remapper with the official minecraft jar on the classpath
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Converts the Forge mods.toml manifest to a fabric.mod.json file
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Converts @OnlyIn annotations to @Environment for Fabric
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Strips @ObjectHolder annotations, removes the field's final modifiers, and creates Consumers that set the fields
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Strips @Mod.EventBusSubscriber and @SubscribeEvent annotations and generates event handlers (that handle events) and event registrars (that register event handlers on behalf of a class)
- Non-static event handlers are not yet supported
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Generates a class implementing ForgeInitializer that registers all the object holders and event registrars
Patchwork Patcher generates jars that require a Fabric mod acting as a compatibility layer to run. Patchwork API fulfills this role, most development will happen there.