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#!/usr/bin/env python
"""Fetch the most recent GAE SDK and decompress it in the current directory.
Usage:
fetch_gae_sdk.py [<dest_dir>]
Current releases are listed here:
https://www.googleapis.com/storage/v1/b/appengine-sdks/o?prefix=featured
"""
from __future__ import print_function
import json
import os
import StringIO
import sys
import urllib2
import zipfile
_SDK_URL = (
'https://www.googleapis.com/storage/v1/b/appengine-sdks/o?prefix=featured')
def get_gae_versions():
try:
version_info_json = urllib2.urlopen(_SDK_URL).read()
except:
return {}
try:
version_info = json.loads(version_info_json)
except:
return {}
return version_info.get('items', {})
def _version_tuple(v):
version_string = os.path.splitext(v['name'])[0].rpartition('_')[2]
return tuple(int(x) for x in version_string.split('.'))
def get_sdk_urls(sdk_versions):
python_releases = [v for v in sdk_versions
if v['name'].startswith('featured/google_appengine')]
current_releases = sorted(python_releases, key=_version_tuple,
reverse=True)
return [release['mediaLink'] for release in current_releases]
def main(argv):
if len(argv) > 2:
print('Usage: {0} [<destination_dir>]'.format(argv[0]))
return 1
dest_dir = argv[1] if len(argv) > 1 else '.'
if not os.path.exists(dest_dir):
os.makedirs(dest_dir)
if os.path.exists(os.path.join(dest_dir, 'google_appengine')):
print('GAE SDK already installed at {0}, exiting.'.format(dest_dir))
return 0
sdk_versions = get_gae_versions()
if not sdk_versions:
print('Error fetching GAE SDK version info')
return 1
sdk_urls = get_sdk_urls(sdk_versions)
for sdk_url in sdk_urls:
try:
sdk_contents = StringIO.StringIO(urllib2.urlopen(sdk_url).read())
break
except:
pass
else:
print('Could not read SDK from any of ', sdk_urls)
return 1
sdk_contents.seek(0)
try:
zip_contents = zipfile.ZipFile(sdk_contents)
zip_contents.extractall(dest_dir)
except:
print('Error extracting SDK contents')
return 1
if __name__ == '__main__':
sys.exit(main(sys.argv[:]))