Android Library module: Copy one localication to another during build time

build.gradle.kts

androidComponents.onVariants { variant ->
    generateCopyValuesTask(variant, "values-sr-rRS", "values-b+sr+Latn", "copySerbianValuesTaskFor")
    generateCopyValuesTask(variant, "values-es", "values-ca", "copySpanishValuesTaskFor")
    generateCopyValuesTask(variant, "values-iw", "values-he", "copyHebrewValuesTaskFor")
}

fun generateCopyValuesTask(variant: LibraryVariant, sourceLocale: String, targetLocale: String, taskName: String) {
    variant.sources.res?.let { source: SourceDirectories.Layered ->
        val assetCreationTask =
            project.tasks.register<CopyLocalizedResTask>("$taskName${variant.name}") {
                res.set(project.layout.projectDirectory.dir("src/main/res/$sourceLocale/"))
                this.targetLocale = targetLocale
            }
        source.addGeneratedSourceDirectory(
            assetCreationTask,
            CopyLocalizedResTask::outputDirectory
        )
    }
}


abstract class CopyLocalizedResTask: DefaultTask() {

    @get:InputDirectory
    @get:Optional
    abstract val res: DirectoryProperty

    @get:OutputDirectory
    abstract val outputDirectory: DirectoryProperty

    @get:Input
    abstract var targetLocale: String


    @get:Inject abstract val fs: FileSystemOperations

    @TaskAction
    fun taskAction() {
        val target = File(outputDirectory.get().asFile, targetLocale)
        target.mkdir()

        println("Copying values from ${res.get()} to $target")

        fs.copy {
            from(res.get())
            into(target)
            duplicatesStrategy = DuplicatesStrategy.EXCLUDE
        }
    }
}