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# Note that this script was written to be executable by either version
# of python (checked by running pylint-2 and pylint-3 on it). Also
# note that the python version this script gets executed by is decided
# on by httpd/backends.cxx.
"""Build a docker file and container image based on a JSON template."""
from __future__ import print_function
import subprocess
import sys
import json
import re
import datetime
def _eprint(*args, **kwargs):
"""Print to stderr."""
print(*args, file=sys.stderr, **kwargs)
def main():
"""Main function."""
try:
raw_json = subprocess.check_output(["buildah", "images", "--json"])
except subprocess.CalledProcessError as err:
_eprint('buildah images failed: %s' % err)
sys.exit(1)
try:
images_json = json.loads(raw_json)
except ValueError as err:
_eprint("Error: Invalid JSON input: %s" % err)
sys.exit(1)
_eprint(images_json)
name_regexp = re.compile(r'^sourceware.org/[a-f\d_]+/[a-f\d]+:(\d+)$')
# print the keys and values
for item in images_json:
#print("The item is ({})".format(item))
if not isinstance(item, dict):
_eprint("Expected a json dict, got a %s" % type(item))
continue
for key in item:
value = item[key]
if key != "names":
continue
# The value of 'names' should be a list of names for this
# image.
if not isinstance(value, list):
_eprint("Expected a json list, got a %s" % type(value))
continue
for name in value:
match = name_regexp.match(name)
if match:
date_str = match.group(1)
print("full name: %s, date: %s" % (name, date_str))
# Convert the date string into a numeric date/time.
dt_then = datetime.datetime.strptime(date_str, "%Y%m%d%H%M")
dt_now = datetime.datetime.utcnow()
# If for some reason the image date is in the
# future, skip it.
if dt_then >= dt_now:
continue
time_delta = dt_now - dt_then
two_days = datetime.timedelta(days=2)
if time_delta > two_days:
if subprocess.call(["buildah", "rmi", name]) == 0:
print("Remove %s" % name)
else:
_eprint("Error removing image %s" % name)
print("")
sys.exit(0)
if __name__ == '__main__':
main()
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