def main()

in mysqloperator/init_main.py [0:0]

• 33 lines of code
• 9 McCabe index (conditional complexity)

def main(argv):
    # const - when there is an argument without value
    # default - when there is no argument at all
    # nargs = "?" - zero or one arguments
    # nargs = "+" - one or more arguments, returns a list()
    # nargs = 8 - 8 arguments will be consumed
    # nargs = 1 - 1 argument will be consumed, returns a list with one element
    parser = argparse.ArgumentParser(description = "MySQL InnoDB Cluster Instance Sidecar Container")
    parser.add_argument('--logging-level', type = int, nargs="?", default = logging.INFO, help = "Logging Level")
    parser.add_argument('--pod-name', type = str, nargs=1, default=None, help = "Pod Name")
    parser.add_argument('--pod-namespace', type = str, nargs=1, default=None, help = "Pod Namespace")
    parser.add_argument('--datadir', type = str, default = "/var/lib/mysql", help = "Path do data directory")
    args = parser.parse_args(argv)

    datadir = args.datadir

    mysqlsh.globals.shell.options.useWizards = False
    logging.basicConfig(level=args.logging_level,
                        format='%(asctime)s - [%(levelname)s] [%(name)s] %(message)s',
                        datefmt="%Y-%m-%dT%H:%M:%S")
    logger = logging.getLogger("initmysql")

    name = args.pod_name[0] # nargs returns a list
    namespace = args.pod_namespace[0] # nargs returns a list

    logger.info(f"Configuring mysql pod {namespace}/{name}, datadir={datadir}")

    utils.log_banner(__file__, logger)

    if logger.level == logging.DEBUG:
        logger.debug(f"Initial contents of {datadir}:")
        subprocess.run(["ls", "-l", datadir])

        logger.debug("Initial contents of /mnt:")
        subprocess.run(["ls", "-lR", "/mnt"])

    try:
        pod = MySQLPod.read(name, namespace)
        cluster = pod.get_cluster()

        init_conf(datadir, pod, cluster, logger)
        init_meb_restore(pod, cluster, logger)
    except Exception as e:
        import traceback
        traceback.print_exc()
        logger.critical(f"Unhandled exception while bootstrapping MySQL: {e}")
        # TODO post event to the Pod and the Cluster object if this is the seed
        return 1

    # TODO support for restoring from clone snapshot or MEB goes in here

    return 0