def METHOD_NAME():
  # Set up argument parser.
  parser = argparse.ArgumentParser(description='Create translation files.')
  parser.add_argument(
      '--author',
      default='Ellen Spertus <ellen.spertus@gmail.com>',
      help='name and email address of contact for translators')
  parser.add_argument('--lang', default='en',
                      help='ISO 639-1 source language code')
  parser.add_argument('--output_dir', default='json',
                      help='relative directory for output files')
  parser.add_argument('--input_file', default='messages.js',
                      help='input file')
  parser.add_argument('--quiet', action='store_true', default=False,
                      help='only display warnings, not routine info')
  args = parser.parse_args()
  if (not args.output_dir.endswith(os.path.sep)):
    args.output_dir += os.path.sep
  # Read and parse input file.
  results = []
  synonyms = {}
  constants = {}  # Values that are constant across all languages.
  description = ''
  infile = codecs.open(args.input_file, 'r', 'utf-8')
  for line in infile:
    if line.startswith('///'):
      if description:
        description = description + ' ' + line[3:].strip()
      else:
        description = line[3:].strip()
    else:
      match = _INPUT_DEF_PATTERN.match(line)
      if match:
        key = match.group(1)
        value = match.group(2).replace("\\'", "'")
        if not description:
          print('Warning: No description for ' + result['meaning'])
        if (description and _CONSTANT_DESCRIPTION_PATTERN.search(description)):
          constants[key] = value
        else:
          result = {}
          result['meaning'] = key
          result['source'] = value
          result['description'] = description
          results.append(result)
        description = ''
      else:
        match = _INPUT_SYN_PATTERN.match(line)
        if match:
          if description:
            print('Warning: Description preceding definition of synonym {0}.'.
                  format(match.group(1)))
            description = ''
          synonyms[match.group(1)] = match.group(2)
  infile.close()
  # Create <lang_file>.json, keys.json, and qqq.json.
  write_files(args.author, args.lang, args.output_dir, results, False)
  # Create synonyms.json.
  synonym_file_name = os.path.join(os.curdir, args.output_dir, 'synonyms.json')
  with open(synonym_file_name, 'w') as outfile:
    json.dump(synonyms, outfile)
  if not args.quiet:
    print("Wrote {0} synonym pairs to {1}.".format(
        len(synonyms), synonym_file_name))
  # Create constants.json
  constants_file_name = os.path.join(os.curdir, args.output_dir, 'constants.json')
  with open(constants_file_name, 'w') as outfile:
    json.dump(constants, outfile)
  if not args.quiet:
    print("Wrote {0} constant pairs to {1}.".format(
        len(constants), synonym_file_name))