Add infrastructure to download golang and build AppRTC collider.

download_appengine_sdk.py

Index: download_appengine_sdk.py
===================================================================
--- download_appengine_sdk.py	(revision 293292)
+++ download_appengine_sdk.py	(working copy)
@@ -1,77 +0,0 @@
-#!/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))