get_config.py

#!/usr/bin/env python

# Copyright The IETF Trust 2019, All Rights Reserved
# Copyright (c) 2018 Cisco and/or its affiliates.
# This software is licensed to you under the terms of the Apache License, Version 2.0 (the "License").
# You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
# The code, technical concepts, and all information contained herein, are the property of Cisco Technology, Inc.
# and/or its affiliated entities, under various laws including copyright, international treaties, patent,
# and/or contract. Any use of the material herein must be in accordance with the terms of the License.
# All rights not expressly granted by the License are reserved.
# Unless required by applicable law or agreed to separately in writing, software distributed under the
# License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
# either express or implied.

__author__ = 'Eric Vyncke'
__copyright__ = 'Copyright(c) 2018, Cisco Systems, Inc.,  Copyright The IETF Trust 2019, All Rights Reserved'
__license__ = 'Apache V2.0'
__email__ = 'evyncke@cisco.com'

"""
Extract a single value out of the main /etc/yangcatalog/yangcatalog.conf file
"""

import argparse
import configparser
import os

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Extract the value for a single key from a configuration file')
    parser.add_argument(
        '--config',
        help='Path to the config file ' 'Default is {}'.format(os.environ['YANGCATALOG_CONFIG_PATH']),
        type=str,
        default=os.environ['YANGCATALOG_CONFIG_PATH'],
    )
    parser.add_argument('--section', help='Mandatory configuration section.', type=str)
    parser.add_argument('--key', help='Mandatory key to search.', type=str)

    args = parser.parse_args()

    config = configparser.ConfigParser(interpolation=configparser.ExtendedInterpolation())
    config.read(args.config)
    print(config.get(args.section, args.key))