# Copyright (c) 2013 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# 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.

# TODO(mikal): move eventlet imports to nova.__init__ once we move to PBR
import os
import sys

# NOTE(mikal): All of this is because if dnspython is present in your
# environment then eventlet monkeypatches socket.getaddrinfo() with an
# implementation which doesn't work for IPv6. What we're checking here is
# that the magic environment variable was set when the import happened.
if ('eventlet' in sys.modules and
        os.environ.get('EVENTLET_NO_GREENDNS', '').lower() != 'yes'):
    raise ImportError('eventlet imported before nova/cmd/__init__ '
                      '(env var set to %s)'
                      % os.environ.get('EVENTLET_NO_GREENDNS'))

os.environ['EVENTLET_NO_GREENDNS'] = 'yes'

import eventlet

eventlet.monkey_patch(os=False)