Generate files that are neither source code nor resources about ksp

[hfhbd]

@swankjesse Did you also find a Multiplatform solution to exclude the generated resources?

[ephemient]

I have a necessary workaround in my codebase

val resourcesDir = codeGenerator::class.java
    .getDeclaredMethod("extensionToDirectory", String::class.java)
    .apply { isAccessible = true }
    .invoke(codeGenerator, "json") as File
codeGenerator::class.java
    .getDeclaredMethod("createNewFile", Dependencies::class.java, String::class.java, File::class.java)
    .apply { isAccessible = true }
    .invoke(codeGenerator, dependencies, "data.json", resourcesDir.parentFile) as OutputStream

but would greatly prefer real support.

[swankjesse]

I have a straw man solution. I propose a new overload of CodeGenerator.createNewFile():

    /**
     * The relative path should include 0 or more directories and a file
     * name complete with extension appropriate for the generated file
     * type. Some examples:
     * 
     *  * "com/example/project/MyGeneratedFile.kt"
     *  * "com/example/project/MyGeneratedFile.java"
     *  * "my-resource-directory/my-resource.txt"
     *  * "my-build-directory/my-build-output.txt"
     */
    fun createNewFile(
        dependencies: Dependencies,
        relativePath: String,
        type: GeneratedFileType,
    ): OutputStream

    enum class GeneratedFileType {
      KotlinSource,
      JavaSouce,
      Resource,
      BuildOutput,
    }

This mechanism would be more explicit than the current API that checks extension names. It would also satisfy my use case of generating files that are neither source code nor resources.