To make this work with forge literally all you need to do is make proguard use the srg jar but it will always use a meme jar which causes errors when trying to compile with srg mappings.
To fix it i just replaced the old libraryjar with the srgBin.jar and it just werks
#-libraryjars 'tempLibraries/minecraft-1.12.2.jar' -libraryjars 'C:/Users/me/.gradle/caches/minecraft/net/minecraft/minecraft/1.12.2/stable/39/minecraft-1.12.2-srgBin.jar'
To make this work with forge literally all you need to do is make proguard use the srg jar but it will always use a meme jar which causes errors when trying to compile with srg mappings. To fix it i just replaced the old libraryjar with the srgBin.jar and it just werks
#-libraryjars 'tempLibraries/minecraft-1.12.2.jar' -libraryjars 'C:/Users/me/.gradle/caches/minecraft/net/minecraft/minecraft/1.12.2/stable/39/minecraft-1.12.2-srgBin.jar'
fix it nerds