ubuntu-dev-tools/ubuntu-iso

#!/usr/bin/python3

# ubuntuiso - tool to examine Ubuntu CD (ISO) installation media
# Copyright (C) 2008 Canonical Ltd.
# Author: Matt Zimmerman <mdz@ubuntu.com>
#
# ##################################################################
#
# 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, version 2
# of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# See file /usr/share/common-licenses/GPL-2 for more details.
#
# ##################################################################

# pylint: disable=invalid-name
# pylint: enable=invalid-name

import argparse
import subprocess
import sys

from ubuntutools import getLogger

Logger = getLogger()


def extract(iso, path):
    command = ["isoinfo", "-R", "-i", iso, "-x", path]
    pipe = subprocess.run(
        command, check=False, encoding="utf-8", stdout=subprocess.PIPE, stderr=subprocess.PIPE
    )

    if pipe.returncode != 0:
        sys.stderr.write(pipe.stderr)
        sys.exit(pipe.returncode)

    return pipe.stdout


def main():
    desc = "Given an ISO, %(prog)s will display the Ubuntu version information"
    parser = argparse.ArgumentParser(usage="%(prog)s [options] iso...", description=desc)
    parser.add_argument("isos", nargs="*", help=argparse.SUPPRESS)
    args = parser.parse_args()
    err = False

    for iso in args.isos:
        if len(args.isos) > 1:
            prefix = f"{iso}:"
        else:
            prefix = ""

        version = extract(iso, "/.disk/info")

        if len(version) == 0:
            Logger.error("%s does not appear to be an Ubuntu ISO", iso)
            err = True
            continue

        Logger.info(prefix + version)

    if err:
        sys.exit(1)


if __name__ == "__main__":
    main()
    sys.exit(0)