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#!/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.
"""
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))
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())
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