return None
    lang = lang.lower()
    return lang


def complete_existing_lang(incomplete: str):
    lang_path: Path
    for lang_path in get_lang_paths():
        if lang_path.is_dir() and lang_path.name.startswith(incomplete):
            yield lang_path.name


@app.callback()
def callback() -> None:
    # For MacOS with Cairo

    github_repository: Annotated[str, typer.Option(envvar="GITHUB_REPOSITORY")],
) -> None:
    print("Setting up GitHub Actions git user")
    repo = git.Repo(Path(__file__).absolute().parent.parent)
    if not repo.is_dirty(untracked_files=True):
        print("Repository is clean, no changes to commit")
        return
    subprocess.run(["git", "config", "user.name", "github-actions[bot]"], check=True)
    subprocess.run(