[🐞]: Generation of dynamic resources for foreign namespaces doesn't work out of the box

BEFORE CONTINUING:

[X] Always check you are using the latest version of these mods and its dependencies
[X] Remove known problematic rendering mods such as Optifine, Sodium and others

Version-Loader

1.20.1-fabric

Moonlight Lib Version

moonlight 1.20-2.8.57

Issue Detail

Still trying to add fluid tags for my mod's fluids, I stumbled upon an unrelated issue. It took me a ton of debugging to figure out the source of this one. Since vanilla fluid tags determine game physics, I wanted to add my mod's fluids to the vanilla minecraft:water and minecraft:lava tags, which I did with the following line of code (Kotlin), working around #177 :

fun DynamicDataPack.addFluidTag(builder: SimpleTagBuilder) {
    val loc = ResType.TAGS.getPath(builder.id.withPrefixedPath("fluids/"))
    addJson(loc, builder.serializeToJson(), ResType.GENERIC)
}

This worked like a charm for my own mod's tags, but it just did nothing for the vanilla tags. I checked, and the generated pack had the correct folder structure. I initially thought DynamicResourcePack was looking up resources wrong, and nearly filed a bug report for it, but the issue actually has to do with namespaces.

The constructor of LifecycledResourceManagerImpl (mojmap MultiPackResourceManager) starts as follows:

public LifecycledResourceManagerImpl(ResourceType type, List<ResourcePack> packs) {
    this.packs = List.copyOf(packs);
    Map<String, NamespaceResourceManager> map = new HashMap();
    List<String> list = packs.stream().flatMap(pack -> pack.getNamespaces(type).stream()).distinct().toList();
    // ...
}

It queries the namespaces for each resource pack, and the constructor dispatches the packs to NamespaceResourceManagers (mojmap FallbackResourceManager). The problem is, the namespaces of DynamicResourcePacks (besides the parent mod's) aren't determined until regenerateDynamicAssets fires, which only happens at the tail of this constructor, so this makes all registrations for namespaces other than the mod's ineffective.

Calling DynamicResourcePack#addNamespaces on init fixes the issue.

I'm filing a bug report because some bits of code lead me to believe this isn't intended behavior, specifically the first line of addBytes, which makes it seem like the namespaces are intended to be gathered dynamically:

protected void addBytes(Identifier path, byte[] bytes) {
        this.namespaces.add(path.getNamespace());
        this.resources.put(path, bytes);
        // ...
}

Log Attachment

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OPTIONAL: To Produce

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OPTIONAL: Which mods are affected?

No response

MehVahdJukaar / Moonlight