def _ParseCommandLine()

in build/get_syzygy_binaries.py [0:0]

• 45 lines of code
• 10 McCabe index (conditional complexity)

def _ParseCommandLine():
  """Parses the command-line and returns an options structure."""
  option_parser = optparse.OptionParser()
  option_parser.add_option('--dry-run', action='store_true', default=False,
      help='If true then will simply list actions that would be performed.')
  option_parser.add_option('--force', action='store_true', default=False,
      help='Force an installation even if the binaries are up to date.')
  option_parser.add_option('--no-cleanup', action='store_true', default=False,
      help='Allow installation on non-Windows platforms, and skip the forced '
           'cleanup step.')
  option_parser.add_option('--output-dir', type='string',
      help='The path where the binaries will be replaced. Existing binaries '
           'will only be overwritten if not up to date.')
  option_parser.add_option('--overwrite', action='store_true', default=False,
      help='If specified then the installation will happily delete and rewrite '
           'the entire output directory, blasting any local changes.')
  option_parser.add_option('--revision', type='string',
      help='The SVN revision or GIT hash associated with the required version.')
  option_parser.add_option('--revision-file', type='string',
      help='A text file containing an SVN revision or GIT hash.')
  option_parser.add_option('--resource', type='string', action='append',
      dest='resources', help='A resource to be downloaded.')
  option_parser.add_option('--verbose', dest='log_level', action='store_const',
      default=logging.INFO, const=logging.DEBUG,
      help='Enables verbose logging.')
  option_parser.add_option('--quiet', dest='log_level', action='store_const',
      default=logging.INFO, const=logging.ERROR,
      help='Disables all output except for errors.')
  options, args = option_parser.parse_args()
  if args:
    option_parser.error('Unexpected arguments: %s' % args)
  if not options.output_dir:
    option_parser.error('Must specify --output-dir.')
  if not options.revision and not options.revision_file:
    option_parser.error('Must specify one of --revision or --revision-file.')
  if options.revision and options.revision_file:
    option_parser.error('Must not specify both --revision and --revision-file.')

  # Configure logging.
  logging.basicConfig(level=options.log_level)

  # If a revision file has been specified then read it.
  if options.revision_file:
    options.revision = open(options.revision_file, 'rb').read().strip()
    _LOGGER.debug('Parsed revision "%s" from file "%s".',
                 options.revision, options.revision_file)

  # Ensure that the specified SVN revision or GIT hash is valid.
  if not _REVISION_RE.match(options.revision):
    option_parser.error('Must specify a valid SVN or GIT revision.')

  # This just makes output prettier to read.
  options.output_dir = os.path.normpath(options.output_dir)

  return options