Copies the source Protobuf files into a build directory.

    Args:
        source_dir (str): source directory of the Protobuf files
        dest_dir (str): destination directory of the Protobuf files

def clone_source_dir(source_dir, dest_dir):
    """Copies the source Protobuf files into a build directory.

    Args:
        source_dir (str): source directory of the Protobuf files
        dest_dir (str): destination directory of the Protobuf files
    """
    if os.path.isdir(dest_dir):
        print('removing', dest_dir)
        shutil.rmtree(dest_dir)
    shutil.copytree(source_dir, dest_dir)