I'm currently updating my mod from 1.20.2 to 1.20.4 and the forge `DatapackBuiltinEntriesProvider` class is missing. I've looked through the forge source files for an alternative and I'm struggling to find one. I have also tried using different forge versions (49.0.0 to 49.0.14) and they are all missing it. As far as I am aware this is the only missing java class and there is no mention of it in the forge changelogs.

If anyone has an idea how to fix this or any suggestions what to do next before making a bug report.

Edited January 7, 20241 yr by InvictusSlayer
Fixed class name from DatapackBuiltinRegistriesProvider

It appears this was in-error, you can find the file has been deleted in a commit.
It is planned to be re-added soon:
https://github.com/MinecraftForge/MinecraftForge/pull/9848
https://github.com/MinecraftForge/MinecraftForge/pull/9848/files/13785854f678a08c7c43c6953bddc3d619013d11

In the meantime, you can reconstruct the class contents:

https://github.com/MinecraftForge/MinecraftForge/pull/9848/files/13785854f678a08c7c43c6953bddc3d619013d11#diff-54d34c579bf88853bc427e7c0137d9dad58856f4ce9372a7cf342f3c898e387f

Edited January 21, 20241 yr by deddybones
fixing link

As an update on this - I was able to use reconstructed classes to add ores in, fully functioning.
I did need to reconstruct the RegistrySetBuilder, RegistryPatchGenerator, and DatapackBuiltinEntriesProvider though.

Good luck!

Thanks so much! I managed to get it working for all vanilla registries with only reconstructing the DatapackBuiltinEntriesProvider. It doesn't work for forge registries like BiomeModifiers and StructureModifiers but they aren't too much hastle to write manually so I've just removed them from my builder temporarily.