Adding apprtc and downloading of google appengine sdk to webrtc.DEPS.

download_appengine_sdk.py

+#!/usr/bin/python
+# Copyright 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.
+
+"""Downloads the appengine SDK from WebRTC storage and unpacks it.
+
+Requires that depot_tools is installed and in the PATH. This script expects
+to run with Chrome's base dir as the working directory, e.g. where the .gclient
+file is. This is what should happen if this script is invoked as a hook action.
+"""
+
+import hashlib
+import os
+import shutil
+import sys
+import subprocess
+import zipfile
+
+
+def _DownloadAppEngineZipFile(webrtc_deps_path):
+  print 'Downloading files in %s...' % webrtc_deps_path
+
+  extension = 'bat' if 'win32' in sys.platform else 'py'
+  cmd = ['download_from_google_storage.%s' % extension,
+         '--bucket=chromium-webrtc-resources',
+         '--directory', webrtc_deps_path]
+  subprocess.check_call(cmd)
+
+
+def _ComputeSHA1(path):
+  if not os.path.exists(path):
+    return 0
+
+  sha1 = hashlib.sha1()
+  file_to_hash = open(path, 'rb')
+  try:
+    sha1.update(file_to_hash.read())
+  finally:
+    file_to_hash.close()
+
+  return sha1.hexdigest()
+
+
+# This is necessary since Windows won't allow us to unzip onto an existing dir.
+def _DeleteOldAppEngineDir():
+  app_engine_dir = 'google_appengine'
+  print 'Deleting %s in %s...' % (app_engine_dir, os.getcwd())
+  shutil.rmtree(app_engine_dir, ignore_errors=True)
+
+
+def _Unzip(path):
+  print 'Unzipping %s in %s...' % (path, os.getcwd())
+  zip_file = zipfile.ZipFile(path)
+  try:
+    zip_file.extractall()
+  finally:
+    zip_file.close()
+
+
+def main(argv):
+  if len(argv) == 1:
+    return 'Usage: %s <path to webrtc.DEPS>' % argv[0]
+
+  webrtc_deps_path = argv[1]
+  zip_path = os.path.join(webrtc_deps_path, 'google-appengine.zip')
+  old_zip_sha1 = _ComputeSHA1(zip_path)
+
+  _DownloadAppEngineZipFile(webrtc_deps_path)
+
+  if old_zip_sha1 != _ComputeSHA1(zip_path):
+    _DeleteOldAppEngineDir()
+    _Unzip(zip_path)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))