text: # Copyright 2016 Cisco Systems, 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.
  
  from distutils.dist import Distribution
  import os
  from subprocess import call
  
  from django.core.management.base import BaseCommand
  
  
  class Command(BaseCommand):
      help = ('Extract strings that have been marked for translation into .POT '
              'files.')
  
      def add_arguments(self, parser):
          parser.add_argument('-m', '--module', type=str, nargs='+',
                              default=['openstack_dashboard', 'horizon'],
                              help=("The target python module(s) to extract "
                                    "strings from"))
          parser.add_argument('-d', '--domain', choices=['django', 'djangojs'],
                              nargs='+', default=['django', 'djangojs'],
                              help="Domain(s) of the .pot file")
          parser.add_argument('--check-only', action='store_true',
                              help=("Checks that extraction works correctly, "
                                    "then deletes the .pot file to avoid "
                                    "polluting the source code"))
  
      def handle(self, *args, **options):
          cmd = ('python setup.py {quiet} extract_messages '
                 '-F babel-{domain}.cfg '
                 '--input-dirs {module} '
                 '-o {potfile}')
          distribution = Distribution()
          distribution.parse_config_files(distribution.find_config_files())
  
          quiet = '-q' if int(options['verbosity']) == 0 else ''
          if options['check_only']:
              cmd += " ; rm {potfile}"
  
          for module in options['module']:
              for domain in options['domain']:
                  potfile = '{module}/locale/{domain}.pot'.format(module=module,
                                                                  domain=domain)
                  if not os.path.exists(potfile):
                      with open(potfile, 'wb') as f:
                          f.write(b'')
  
                  call(cmd.format(module=module, domain=domain, potfile=potfile,
                                  quiet=quiet), shell=True)
  