Home | History | Annotate | Download | only in tools 
      1 #!/usr/bin/env python
      2 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
      3 # Use of this source code is governed by a BSD-style license that can be
      4 # found in the LICENSE file.
      5 
      6 """Chrome Version Tool
      7 
      8 Scrapes Chrome channel information and prints out the requested nugget of
      9 information.
     10 """
     11 
     12 import json
     13 import optparse
     14 import os
     15 import string
     16 import sys
     17 import urllib
     18 
     19 URL = 'https://omahaproxy.appspot.com/json'
     20 
     21 
     22 def main():
     23   try:
     24     data = json.load(urllib.urlopen(URL))
     25   except Exception as e:
     26     print 'Error: could not load %s\n\n%s' % (URL, str(e))
     27     return 1
     28 
     29   # Iterate to find out valid values for OS, channel, and field options.
     30   oses = set()
     31   channels = set()
     32   fields = set()
     33 
     34   for os_versions in data:
     35     oses.add(os_versions['os'])
     36 
     37     for version in os_versions['versions']:
     38       for field in version:
     39         if field == 'channel':
     40           channels.add(version['channel'])
     41         else:
     42           fields.add(field)
     43 
     44   oses = sorted(oses)
     45   channels = sorted(channels)
     46   fields = sorted(fields)
     47 
     48   # Command line parsing fun begins!
     49   usage = ('%prog [options]\n'
     50            'Print out information about a particular Chrome channel.')
     51   parser = optparse.OptionParser(usage=usage)
     52 
     53   parser.add_option('-o', '--os',
     54                     choices=oses,
     55                     default='win',
     56                     help='The operating system of interest: %s '
     57                          '[default: %%default]' % ', '.join(oses))
     58   parser.add_option('-c', '--channel',
     59                     choices=channels,
     60                     default='stable',
     61                     help='The channel of interest: %s '
     62                          '[default: %%default]' % ', '.join(channels))
     63   parser.add_option('-f', '--field',
     64                     choices=fields,
     65                     default='version',
     66                     help='The field of interest: %s '
     67                          '[default: %%default] ' % ', '.join(fields))
     68   (opts, args) = parser.parse_args()
     69 
     70   # Print out requested data if available.
     71   for os_versions in data:
     72     if os_versions['os'] != opts.os:
     73       continue
     74 
     75     for version in os_versions['versions']:
     76       if version['channel'] != opts.channel:
     77         continue
     78 
     79       if opts.field not in version:
     80         continue
     81 
     82       print version[opts.field]
     83       return 0
     84 
     85   print 'Error: unable to find %s for Chrome %s %s.' % (
     86       opts.field, opts.os, opts.channel)
     87   return 1
     88 
     89 if __name__ == '__main__':
     90   sys.exit(main())
     91