[1.19.x] DataGen and other mods

[TaeoG]

Is it possible during the GatherDataEvent event to do things like iterate through the recipes of another mod that you have as a dependency?

[warjort]

If you mean the real recipe objects, then no.

Recipes are loaded when the datapacks are loaded. i.e. when the game loads a save

[ChampionAsh5357]

2 hours ago, TaeoG said:

Is it possible during the GatherDataEvent event to do things like iterate through the recipes of another mod that you have as a dependency?

Depends on the context. If you just need to see whether the recipe exists, then yes; you can use `ExistingFileHelper#exists` to check. However, if you need to check the contents of the recipe, you would need to load them yourself because I don't believe that packs are loaded during data generation. However, you should generally only need the first case. Additionally, you would have to declare `--existing-mod', '<modid>' as one of the arguments in your data configuration.

[TaeoG]

Ah that's a bummer, but not terribly surprising. My hope was to find all items that meet certain criteria, like having something in their recipe, and put those items in a tag. I can do it by hand of course but it gets unwieldy.

[ChampionAsh5357]

2 hours ago, TaeoG said:

My hope was to find all items that meet certain criteria, like having something in their recipe, and put those items in a tag.

It would probably be better to do that in code when recipes are loaded normally. I would use `TagsUpdatedEvent` as it is guaranteed to be executed after recipes are loaded on the server. I'm suggesting this event as `RecipesUpdatedEvent` is only on the client.

[TaeoG]

If there is a datapack altering these tags, would it be loaded before or after this event?

[ChampionAsh5357]

13 hours ago, TaeoG said:

If there is a datapack altering these tags, would it be loaded before or after this event?

All datagen entries are loaded before this event iirc. Though, I just remembered there was the `OnDatapackSyncEvent` which happens literally after everything is loaded on the server except for functions and structures, which you don't care about.