| #!/usr/bin/env python |
| # Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Chrome Version Tool |
| |
| Scrapes Chrome channel information and prints out the requested nugget of |
| information. |
| """ |
| |
| import json |
| import optparse |
| import os |
| import string |
| import sys |
| import urllib |
| |
| URL = 'https://omahaproxy.appspot.com/json' |
| |
| |
| def main(): |
| try: |
| data = json.load(urllib.urlopen(URL)) |
| except Exception as e: |
| print 'Error: could not load %s\n\n%s' % (URL, str(e)) |
| return 1 |
| |
| # Iterate to find out valid values for OS, channel, and field options. |
| oses = set() |
| channels = set() |
| fields = set() |
| |
| for os_versions in data: |
| oses.add(os_versions['os']) |
| |
| for version in os_versions['versions']: |
| for field in version: |
| if field == 'channel': |
| channels.add(version['channel']) |
| else: |
| fields.add(field) |
| |
| oses = sorted(oses) |
| channels = sorted(channels) |
| fields = sorted(fields) |
| |
| # Command line parsing fun begins! |
| usage = ('%prog [options]\n' |
| 'Print out information about a particular Chrome channel.') |
| parser = optparse.OptionParser(usage=usage) |
| |
| parser.add_option('-o', '--os', |
| choices=oses, |
| default='win', |
| help='The operating system of interest: %s ' |
| '[default: %%default]' % ', '.join(oses)) |
| parser.add_option('-c', '--channel', |
| choices=channels, |
| default='stable', |
| help='The channel of interest: %s ' |
| '[default: %%default]' % ', '.join(channels)) |
| parser.add_option('-f', '--field', |
| choices=fields, |
| default='version', |
| help='The field of interest: %s ' |
| '[default: %%default] ' % ', '.join(fields)) |
| (opts, args) = parser.parse_args() |
| |
| # Print out requested data if available. |
| for os_versions in data: |
| if os_versions['os'] != opts.os: |
| continue |
| |
| for version in os_versions['versions']: |
| if version['channel'] != opts.channel: |
| continue |
| |
| if opts.field not in version: |
| continue |
| |
| print version[opts.field] |
| return 0 |
| |
| print 'Error: unable to find %s for Chrome %s %s.' % ( |
| opts.field, opts.os, opts.channel) |
| return 1 |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |