# Copyright 2014 Open Source Robotics Foundation, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to 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.
# See the License for the specific language governing permissions and
# limitations under the License.

import subprocess


def dpkg_parsechangelog(source_dir, fields):
    cmd = ['dpkg-parsechangelog']
    output = subprocess.check_output(cmd, cwd=source_dir)
    values = {}
    for line in output.decode().splitlines():
        for field in fields:
            prefix = '%s: ' % field
            if line.startswith(prefix):
                values[field] = line[len(prefix):]
    assert len(fields) == len(values.keys())
    return [values[field] for field in fields]
