config.py 文件源码

def _get_dir(toml_config_setting,
             sawtooth_home_dir,
             windows_dir,
             default_dir):
    """Determines the directory path based on configuration.

    Arguments:
        toml_config_setting (str): The name of the config setting related
            to the directory which will appear in path.toml.
        sawtooth_home_dir (str): The directory under the SAWTOOTH_HOME
            environment variable.  For example, for 'data' if the data
            directory is $SAWTOOTH_HOME/data.
        windows_dir (str): The windows path relative to the computed base
            directory.
        default_dir (str): The default path on Linux.

    Returns:
        directory (str): The path.
    """
    conf_file = os.path.join(get_config_dir(), 'path.toml')
    if os.path.exists(conf_file):
        with open(conf_file) as fd:
            raw_config = fd.read()
        toml_config = toml.loads(raw_config)
        if toml_config_setting in toml_config:
            return toml_config[toml_config_setting]

    if 'SAWTOOTH_HOME' in os.environ:
        return os.path.join(os.environ['SAWTOOTH_HOME'], sawtooth_home_dir)

    if os.name == 'nt':
        base_dir = \
            os.path.dirname(os.path.dirname(os.path.abspath(sys.argv[0])))
        return os.path.join(base_dir, windows_dir)

    return default_dir