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1 #!/usr/bin/python | |
2 # Copyright 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 """Downloads the appengine SDK from WebRTC storage and unpacks it. | |
7 | |
8 Requires that depot_tools is installed and in the PATH. This script expects | |
9 to run with Chrome's base dir as the working directory, e.g. where the .gclient | |
10 file is. This is what should happen if this script is invoked as a hook action. | |
11 """ | |
12 | |
13 import hashlib | |
14 import os | |
15 import shutil | |
16 import sys | |
17 import subprocess | |
18 import zipfile | |
19 | |
20 | |
21 def _DownloadAppEngineZipFile(webrtc_deps_path): | |
22 print 'Downloading files in %s...' % webrtc_deps_path | |
23 | |
24 extension = 'bat' if 'win32' in sys.platform else 'py' | |
25 cmd = ['download_from_google_storage.%s' % extension, | |
26 '--bucket=chromium-webrtc-resources', | |
27 '--directory', webrtc_deps_path] | |
28 subprocess.check_call(cmd) | |
29 | |
30 | |
31 def _ComputeSHA1(path): | |
32 if not os.path.exists(path): | |
33 return 0 | |
34 | |
35 sha1 = hashlib.sha1() | |
36 file_to_hash = open(path, 'rb') | |
37 try: | |
38 sha1.update(file_to_hash.read()) | |
39 finally: | |
40 file_to_hash.close() | |
41 | |
42 return sha1.hexdigest() | |
43 | |
44 | |
45 # This is necessary since Windows won't allow us to unzip onto an existing dir. | |
46 def _DeleteOldAppEngineDir(): | |
47 app_engine_dir = 'google_appengine' | |
48 print 'Deleting %s in %s...' % (app_engine_dir, os.getcwd()) | |
49 shutil.rmtree(app_engine_dir, ignore_errors=True) | |
50 | |
51 | |
52 def _Unzip(path): | |
53 print 'Unzipping %s in %s...' % (path, os.getcwd()) | |
54 zip_file = zipfile.ZipFile(path) | |
55 try: | |
56 zip_file.extractall() | |
57 finally: | |
58 zip_file.close() | |
59 | |
60 | |
61 def main(argv): | |
62 if len(argv) == 1: | |
63 return 'Usage: %s <path to webrtc.DEPS>' % argv[0] | |
64 | |
65 webrtc_deps_path = argv[1] | |
66 zip_path = os.path.join(webrtc_deps_path, 'google-appengine.zip') | |
67 old_zip_sha1 = _ComputeSHA1(zip_path) | |
68 | |
69 _DownloadAppEngineZipFile(webrtc_deps_path) | |
70 | |
71 if old_zip_sha1 != _ComputeSHA1(zip_path): | |
72 _DeleteOldAppEngineDir() | |
73 _Unzip(zip_path) | |
74 | |
75 | |
76 if __name__ == '__main__': | |
77 sys.exit(main(sys.argv)) | |
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