[Feature] Datapack Registry Callbacks

[frqnny]

Unless I am mistaken, there currently is no way to modify datapack registries in the API. I'm wondering if its planned or if its in the works?

[ChampionAsh5357]

Could you provide more information? What do you mean by 'modify data registries'? Like add entries to it? Modify existing objects like biomes? Something else entirely?

[frqnny]

I believe the 1.20.2 Registry Rework has a ModifyRegistryEvent that only applies to Builtin Registries. In that event, you can add a callback to each time an object is added to that registry.

It would be particularly useful to do so with datapack registries, as the hook for that is particularly more hidden and should be handled by the API.

[frqnny]

#257 (comment)

Found some discussion around it being done at a later date according to this comment in the PR.

[ChampionAsh5357]

Ah, I'm guessing that's because the datapack registries are added during level load. I don't see any difficulty in adding another event around where RegistryDataLoader.RegistryData#create is called, assuming that the WritableRegistry doesn't get overridden later in the pipeline.

Someone just needs to create the PR for it.