Runtime remapping for plugins on SpongeForge

[zml2008]

Is this request specific to one implementation of Sponge?

Yes, only SpongeForge

Sponge Version

api 9+

What are you requesting?

SpongeForge runs on forge which uses SRG runtime mappings. SpongeVanilla uses mojang mappings at runtime.

This causes problems for plugins which access server internals, since they have to produce separate artifacts.

We should be able to:

1. have plugins declare the mappings they use
2. download mojang mappings at runtime to create moj -> srg
3. compare mappings of each plugin to the current game runtime
4. if mappings do not match, remap the plugin jar

Challenges:

• caching - so we don't have to remap every plugin every launch
• cache cleanup of unused remapped jars (anything unused? is that too aggressive)
• mixins - we'd need to have a (F)?ART plugin to remap mixins, or a refmap remapper plugin plus generate refmaps at plugin build