| #!/usr/bin/env python |
| # Copyright 2013 The Chromium Authors |
| # 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. |
| """ |
| |
| from __future__import print_function |
| |
| 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)) |
| exceptExceptionas e: |
| print('Error: could not load %s\n\n%s'%(URL, str(e))) |
| return1 |
| |
| # Iterate to find out valid values for OS, channel, and field options. |
| oses= set() |
| channels= set() |
| fields= set() |
| |
| for os_versionsin data: |
| oses.add(os_versions['os']) |
| |
| for versionin os_versions['versions']: |
| for fieldin 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_versionsin data: |
| if os_versions['os']!= opts.os: |
| continue |
| |
| for versionin os_versions['versions']: |
| if version['channel']!= opts.channel: |
| continue |
| |
| if opts.fieldnotin version: |
| continue |
| |
| print(version[opts.field]) |
| return0 |
| |
| print('Error: unable to find %s for Chrome %s %s.'%(opts.field, opts.os, |
| opts.channel)) |
| return1 |
| |
| if __name__=='__main__': |
| sys.exit(main()) |
