text: #!/usr/bin/env python3
  #
  # Copyright 2017 The Fontbakery Authors
  # Copyright 2017 The Google Font Tools Authors
  #
  # 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 __future__ import print_function
  
  import argparse
  import os
  import sys
  import requests
  import json
  from gftools.fonts_public_pb2 import FamilyProto
  from google.protobuf import text_format
  
  description = ("Comparison of category fields of local METADATA.pb files"
                 " with data corresponding metadata on the Google Fonts Developer API.\n\n"
                 " In order to use it you need to provide an API key.")
  parser = argparse.ArgumentParser(description=description)
  parser.add_argument('key', help='Key from Google Fonts Developer API')
  parser.add_argument('repo',
                      help=('Directory tree that contains'
                            ' directories with METADATA.pb files.'))
  parser.add_argument('--verbose',
                      help='Print additional information',
                      action="store_true")
  
  
  API_URL = 'https://www.googleapis.com/webfonts/v1/webfonts?key={}'
  def main():
      args = parser.parse_args()
      response = requests.get(API_URL.format(args.key))
      try:
          webfontList = response.json()['items']
          webfontListFamilyNames = [item['family'] for item in webfontList]
      except (ValueError, KeyError):
          sys.exit("Unable to load and parse"
                   " list of families from Google Web Fonts API.")
  
      for dirpath, dirnames, filenames in os.walk(args.repo):
          metadata_path = os.path.join(dirpath, 'METADATA.pb')
          if not os.path.exists(metadata_path):
              continue
  
          metadata = FamilyProto()
          text_data = open(metadata_path, "rb").read()
          text_format.Merge(text_data, metadata)
          try:
              family = metadata.name
          except KeyError:
              print(('ERROR: "{}" does not contain'
                     ' familyname info.').format(metadata_path),
                    file=sys.stderr)
              continue
  
          try:
              index = webfontListFamilyNames.index(family)
              webfontsItem = webfontList[index]
          except ValueError:
              if args.verbose:
                  print(('ERROR: Family "{}" could not be found'
                         ' in Google Web Fonts API.').format(family))
              continue
  
          if metadata.category == "SANS_SERIF":  # That's fine :-)
              category = "sans-serif"
          else:
              category = metadata.category.lower()
  
          if category != webfontsItem['category']:
              print(('ERROR: "{}" category "{}" in git'
                     ' does not match category "{}"'
                     ' in API.').format(family,
                                        metadata.category,
                                        webfontsItem['category']))
          else:
              if args.verbose:
                  print(('OK: "{}" '
                         'category "{}" in sync.').format(family,
                                                          metadata.category))
  
  if __name__ == '__main__':
    main()
  
  