[6.0] Backport ATs using Transform Action

[Jonathing]

Name entails. Part of FG7's new structure is the usage of Gradle's artifact transformers to apply AccessTransformers. This allows consumers to use mapped names from the Minecraft jar in their AT configs. I plan on backporting this to FG6, gated by a flag.

minecraft {
    accessTransformer = project.file('src/main/resources/META-INF/accesstransformer.cfg')
}

fg {
    newAccessTransformer = true
}

This would fix MinecraftForge/MinecraftForge#9954 for UserDev.

[Jonathing]

Reminding myself that this is still on the table. Since ForgeGradle 6 is an all-in-one plugin unlike ForgeGradle 7, what I'll have to do is copy-paste ArtifactAccessTransformer into this project and tweak it to be compatible with Gradle 8.1.

This will be the last enhancement I make to ForgeGradle 6.

[Jonathing]

Closing as out-of-scope for ForgeGradle 6. All hands are on deck for ForgeGradle 7, and I am amplifying its creation speed so that it can be widely used over ForgeGradle 6 as soon as it is ready.

This can be re-opened in the future if we deem it necessary.

[LexManos]

Just out of curiosity.
Does there actually need any work done for this?
AccessTransformers in the FG6 shouldn't be applied if they don't set them in the minecraft block:

minecraft {
    accessTransformer = project.file('src/main/resources/META-INF/accesstransformer.cfg')
}

And replace it with (this is pulled out of my ass, but to illustrate it, would need to be documented cuz I couldn't find it)

apply plugin: 'net.minecraftforge.accesstransformers'

dependecies {
  minecraft('net.minecraftforge') {
    accesstransformers.configure(it) {
      cfg = project.file('src/main/resources/META-INF/accesstransformer.cfg')
    }
  }
}

Basically, because this uses ArtifactTransformers, it should work on old versions with no interactions with FG itself.

[Jonathing]

In theory, yes. In practice, no, because the AccessTransformers Gradle plugin has a minimum requirement of Gradle 9.0.0. Also, don't forget that ForgeGradle 6 targets as far back as Gradle 8.1. Even if I backported the plugin, there are things I use in Gradle 8.4+ that I won't get back there.

[LexManos]

I'm fine with everyone who wants to use this as a plugin requiring 8.4 or whatever the 9.0 - 1 is.
This would allow us to provide official mapped at configs for FG6 users.
May be worth building a one off FG6 net.minecraftforge.accesstransformers.legacy plugin?