Cleaning up "old" appengine versions - great for Managed VM Deployment

cleanup_versions.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""gcloud Version Cleanup Script
"""

import argparse
import os
import subprocess
import logging
import re

GCLOUD_PATH = os.path.join(
    os.environ.get("HOME"),
    "google-cloud-sdk",
    "bin",
    "gcloud",
    )

# Setup Regex for lines like:
#   front   20151001t172936  *
#   front   20151001t172936  -
VERSION_RE = re.compile(r'([\w\-]+)\s+([\d\w]+)\s+([-\*])')

if __name__ == '__main__':

    # Setup logging
    logger = logging.getLogger()
    formatter = logging.Formatter("%(message)s")
    logger.setLevel(logging.INFO)
    logger.propagate = False
    logger.handlers = []
    ch = logging.StreamHandler()
    ch.setLevel(logging.INFO)
    ch.setFormatter(formatter)
    logger.addHandler(ch)

    TITLE = "gcloud version cleanup tool"
    logging.info("")
    logging.info(TITLE)
    logging.info("-"*len(TITLE)+"\n")

    # Setup args
    parser = argparse.ArgumentParser(description='gcloud version cleanup tool')

    parser.add_argument(
        'module',
        help='appengine module to cleanup old versions for'
        )

    args = parser.parse_args()

    output = subprocess.check_output([GCLOUD_PATH,
                                      "preview", "app",
                                      "modules", "list",
                                      args.module,
                                      ])

    lines = output.split("\n")
    for line in lines:
        m = VERSION_RE.match(line)
        if m:
            is_default = m.group(3) == '*'
            version = m.group(2)

            logging.info("version: %s (default: %s)",
                version, str(is_default).lower())

            if not is_default:
                logging.info("deleting...")
                r = subprocess.check_output([GCLOUD_PATH,
                                             "preview", "app",
                                             "modules", "delete",
                                             args.module, "--version",
                                             version, "--quiet",
                                             ])
                logging.info("ok")

I was about to write this on my own, thanks! In case you are interested, a Go implementation is here.