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| 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()) |
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