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name : extract_cron
 #!/usr/bin/python3

# extract_cron - extract cron-related files from .deb s
# Copyright (C) 2007 Stefano Zacchiroli <zack@debian.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

"""Extracts all cron-related files from a (list of) .deb package(s)."""

import os
import re
import sys

from debian import debfile

def is_cron(fname):
    return re.match(r'^etc/cron\.(d|daily|hourly|monthly|weekly)\b', fname)

if __name__ == '__main__':
    if not sys.argv[1:]:
        print("Usage: extract_cron DEB ...")
        sys.exit(1)

    for fname in sys.argv[1:]:
        deb = debfile.DebFile(fname)
        cron_files = filter(is_cron, list(deb.data))
        for cron_file in cron_files:
            print('Extracting cron-related file %s ...' % cron_file)
            path = os.path.join('.', cron_file)
            dir = os.path.dirname(path)
            if not os.path.exists(dir):
                os.mkdir(dir)
            with open(path, 'w') as out:
                out.write(deb.data.get_content(cron_file))
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