#!/usr/bin/env python
description = "Update an existing config file with the latest defaults while maintaining the old configuration."
def update_config(args):
    """
    Update an existing config file with the latest defaults while maintaining the old configuration.
    """
    config_file = args.config_file
    if config_file is None and Path(default_config_file).exists():
        config_file = default_config_file
    elif not Path(config_file).exists():
        raise ValueError(f"The passed config file located at {config_file} doesn't exist.")
    config = load_config_from_file(config_file)
    if config_file.endswith(".json"):
        config.to_json_file(config_file)
    else:
        config.to_yaml_file(config_file)
    return config_file
def update_command_parser(parser, parents):
    parser = parser.add_parser("update", parents=parents, help=description, formatter_class=SubcommandHelpFormatter)
    parser.add_argument(
        "--config_file",
        default=None,
        help=(
            "The path to the config file to update. Will default to a file named default_config.yaml in the cache "
            "location, which is the content of the environment `HF_HOME` suffixed with 'accelerate', or if you don't have "
            "such an environment variable, your cache directory ('~/.cache' or the content of `XDG_CACHE_HOME`) suffixed "
            "with 'huggingface'."
        ),
    )
    parser.set_defaults(func=update_config_command)
    return parser
def update_config_command(args):
    config_file = update_config(args)
    print(f"Sucessfully updated the configuration file at {config_file}.")