With Mojang putting more and more work into datafication (making stuff from the game's code registerable and configurable from datapacks), Mojang itself is using since a few versions the data generation process.

This helps them (and by thus, us), to generate every JSON file we actually need through Java code. It's very convenient as it is less error-prone, since it requires less work from humans.

As such, Fabric API provides a lot of stuff to setup data generation, and the MModding Library extends data generation capabilities as much as possible to make it as much convenient as possible.

Let's talk about this. The library adds the ExtendedDataGeneratorEntrypoint class, explained below with an example:

public class ExampleModDataGenerator implements ExtendedDataGeneratorEntrypoint {

	public void setupManager(DataManager manager) {}

	public void onInitializeDataGenerator(AdvancedMod mod, FabricDataGenerator generator, FabricDataGenerator.Pack pack) {}
}

This is our very base example implementation.

• ExtendedDataGeneratorEntrypoint#setupManager allows setting ResourceProviders to generate world registry json files, and configuring automated data generation.
• ExtendedDataGeneratorEntrypoint#onInitializeDataGenerator lets you provide additional data providers that do not work for automation, or that are not intended for world registry exportation.

These two are being detailed in their own respective pages.