def get_target_region()

in src/mount_efs/__init__.py [0:0]

• 32 lines of code
• 5 McCabe index (conditional complexity)

def get_target_region(config, options):
    def _fatal_error(message):
        fatal_error(
            'Error retrieving region. Please set the "region" parameter '
            "in the efs-utils configuration file or specify it as a "
            "mount option.",
            message,
        )

    if "region" in options:
        return options.get("region")

    try:
        return config.get(CONFIG_SECTION, "region")
    except NoOptionError:
        pass

    try:
        return get_region_from_instance_metadata(config)
    except Exception as e:
        metadata_exception = e
        logging.warning(
            "Region not found in config file and metadata service call failed, falling back "
            'to legacy "dns_name_format" check'
        )

    try:
        region = get_region_from_legacy_dns_format(config)
        sys.stdout.write(
            'Warning: region obtained from "dns_name_format" field. Please set the "region" '
            "parameter in the efs-utils configuration file."
        )
        return region
    except Exception:
        logging.warning('Legacy check for region in "dns_name_format" failed')

    _fatal_error(metadata_exception)