Merge "Allow module gets its own output files using non-empty-string tag" into main

// *inter-module-communication*.

// If mctx module is the same as the param module the output files are obtained

// from outputFiles property of module base, to avoid both setting and

// reading OutputFilesProvider before  GenerateBuildActions is finished. Also

// only empty-string-tag is supported in this case.

// reading OutputFilesProvider before GenerateBuildActions is finished.

// If a module doesn't have the OutputFilesProvider, nil is returned.

func outputFilesForModuleFromProvider(ctx PathContext, module blueprint.Module, tag string) (Paths, error) {

	// TODO: support OutputFilesProvider for singletons

	} else {

		if tag == "" {

			return mctx.Module().base().outputFiles.DefaultOutputFiles, nil

		} else if taggedOutputFiles, hasTag := mctx.Module().base().outputFiles.TaggedOutputFiles[tag]; hasTag {

			return taggedOutputFiles, nil

		} else {

			return nil, fmt.Errorf("unsupported tag %q for module getting its own output files", tag)

		}