#!/usr/bin/env python

# Copyright 2012 Hewlett-Packard Development Company, L.P.
# Copyright 2014 Red Hat, 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 os
import sys

import yaml


def load_service_mapping(filepath="/usr/share/svc-map/services"):
    if not os.path.isfile(filepath):
        return {}
    with open(filepath, 'r') as data_file:
        return yaml.load(data_file.read())


def main():
    for arg in sys.argv[1:]:
        # We need to support the service name being different when installing
        # from source vs. packages. So, if the requested service file already
        # exists, just use that.
        if os.path.exists('/lib/systemd/system/%s.service' % arg):  # systemd
            print(arg)
        elif os.path.exists('/etc/init/%s.conf' % arg):  # upstart
            print(arg)
        else:
            service_map = load_service_mapping()
            name = service_map.get(arg, arg)
            print(name)
    sys.exit(0)


if __name__ == '__main__':
    main()