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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

#############################################################################
##
## Copyright (C) 2020 The Qt Company Ltd.
## Contact: https://www.qt.io/licensing/
##
## This file is part of the release tools of the Qt Toolkit.
##
## $QT_BEGIN_LICENSE:GPL-EXCEPT$
## Commercial License Usage
## Licensees holding valid commercial Qt licenses may use this file in
## accordance with the commercial license agreement provided with the
## Software or, alternatively, in accordance with the terms contained in
## a written agreement between you and The Qt Company. For licensing terms
## and conditions see https://www.qt.io/terms-conditions. For further
## information use the contact form at https://www.qt.io/contact-us.
##
## GNU General Public License Usage
## Alternatively, this file may be used under the terms of the GNU
## General Public License version 3 as published by the Free Software
## Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
## included in the packaging of this file. Please review the following
## information to ensure the GNU General Public License requirements will
## be met: https://www.gnu.org/licenses/gpl-3.0.html.
##
## $QT_END_LICENSE$
##
#############################################################################

import os
import sys
import argparse

try:
    import urllib.request as request
except ImportError:
    # Python 2.x
    import urllib2 as request

try:
    from configparser import ConfigParser
    from io import StringIO
except ImportError:
    # Python 2.x
    from ConfigParser import ConfigParser
    from StringIO import StringIO


_pkg_remote_settings = None


class RemotePkgConfigError(Exception):
    pass


def read_packaging_keys_config_url(url):
    return request.urlopen(url).read().decode('utf-8').strip()


def parse_packaging_keys_config(config):
    buf = StringIO(config)
    settings = ConfigParser()

    try:
        settings.read_file(buf)
    except Exception:
        # Python 2.x
        settings.readfp(buf)
    return settings


def get_pkg_value(key, section="packaging", url=os.getenv("PACKAGING_KEYS_CONFIG_URL")):
    global _pkg_remote_settings
    if not _pkg_remote_settings:
        if not url:
            raise RemotePkgConfigError("Remote config URL not specified")
        _pkg_remote_settings = parse_packaging_keys_config(read_packaging_keys_config_url(url))
    return _pkg_remote_settings.get(section, key)


if __name__ == "__main__":
    parser = argparse.ArgumentParser(prog="Read values from remote config .ini file")
    parser.add_argument("--url", dest="url", type=str, default=os.getenv("PACKAGING_KEYS_CONFIG_URL"),
                        help="Url pointing to file to be read")
    parser.add_argument("--section", type=str, default="packaging", help="The config section within the .ini")
    parser.add_argument("--key", type=str, required=True, help="The config key within the section")
    args = parser.parse_args(sys.argv[1:])
    if not args.url or not args.section:
        parser.print_help(sys.stderr)
        sys.exit(1)

    print("{0}: '{1}'".format(args.key, get_pkg_value(args.key, args.section, args.url)))