Move native system generator to a separate script.

client/dom/scripts/dartdomgenerator.py

 #!/usr/bin/python
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This is the entry point to create Dart APIs from the IDL database."""
 
 import dartgenerator
 import database
 import logging.config
@@ skipping 144 matching lines @@
   parser.add_option('--systems', dest='systems',
                     action='store', type='string',
                     default='frog,dummy,wrapping',
                     help='Systems to generate (frog, native, dummy, '
                          'htmlfrog, htmldartium)')
   parser.add_option('--output-dir', dest='output_dir',
                     action='store', type='string',
                     default=None,
                     help='Directory to put the generated files')
   parser.add_option('--use-database-cache', dest='use_database_cache',
-                    action='store',
+                    action='store_true',
                     default=False,
                     help='''Use the cached database from the previous run to
                     improve startup performance''')
   (options, args) = parser.parse_args()
 
   current_dir = os.path.dirname(__file__)
   systems = options.systems.split(',')
   num_html_systems = ('htmlfrog' in systems) + ('htmldartium' in systems)
   if num_html_systems > 0 and num_html_systems < len(systems):
     print 'Cannot generate html and dom bindings at the same time'
@@ skipping 12 matching lines @@
   # Copy dummy DOM where dartc build expects it.
   if 'dummy' in systems:
     # TODO(sra): Make other tools pick this up directly, or do a copy_dart into
     # a specific directory.
     source = os.path.join(output_dir, 'dom_dummy.dart')
     target = os.path.join(output_dir, 'dom.dart')
     shutil.copyfile(source, target)
 
 if __name__ == '__main__':
   sys.exit(main())