Consider a Java Preprocessor, e.g. Stonecutter

[3arthqu4ke]

We support many versions, all with very little code and very little variation between them.
Using a preprocessor like what Sodium, Distant Horizons or YACL use, e.g. Stonecutter
could help a lot with that.

[3arthqu4ke]

https://github.com/manifold-systems/manifold
https://plugins.gradle.org/plugin/systems.manifold.manifold-gradle-plugin

[ChipWolf]

Stonecutter has moved here now https://github.com/stonecutter-versioning/stonecutter

[okafke]

Development of the mod with manifold has been done here: https://github.com/headlesshq/mc-runtime-test-mod
This is superseded by #47 and headlesshq/mc-runtime-test-mod#2