import os

def write_atomically(file_path, contents):

    staging_file_path = f'{file_path}~'

    try:

        with open(staging_file_path, 'w') as config_staging_file:

            config_staging_file.write(contents)
            config_staging_file.flush()
            os.fsync(config_staging_file.fileno())
            os.replace(staging_file_path, file_path)

    finally:

        if os.path.exists(staging_file_path):
            os.remove(staging_file_path)