Adding support for AppRTC closure compiling.

download_node.py

Index: download_node.py
===================================================================
--- download_node.py	(revision 0)
+++ download_node.py	(working copy)
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+#!/usr/bin/python
+# Copyright 2015 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 node binaries 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 glob
+import os
+import sys
+import tarfile
+import zipfile
+
+import utils
+
+
+def _GetNodeArchivePathForPlatform():
+  archive_extension = 'zip' if utils.GetPlatform() == 'win' else 'tar.gz'
+  return os.path.join(utils.GetPlatform(), 'node.%s' % archive_extension)
+
+
+def _StripVersionNumberFromNodeDir():
+  # The node dir will be called node-x-x-x.tar.gz, rename to just node.
+  unpacked_name = glob.glob('node*')
+  assert len(unpacked_name) == 1, 'Should have precisely one node!'
+  os.rename(unpacked_name[0], 'node')
+
+
+def main(argv):
+  if len(argv) == 1:
+    return 'Usage: %s <path to webrtc.DEPS>' % argv[0]
+  if not os.path.exists('.gclient'):
+    return 'Invoked from wrong dir; invoke from dir with .gclient'
+
+  webrtc_deps_path = argv[1]
+  node_path = os.path.join(webrtc_deps_path, 'node')
+  archive_path = os.path.join(node_path, _GetNodeArchivePathForPlatform())
+  old_archive_sha1 = utils.ComputeSHA1(archive_path)
+
+  utils.DownloadFilesFromGoogleStorage(node_path)
+
+  if (old_archive_sha1 != utils.ComputeSHA1(archive_path)
+      or not os.path.exists('node')):
+    utils.DeleteDirNextToGclient('node')
+    utils.UnpackToWorkingDir(archive_path)
+    _StripVersionNumberFromNodeDir()
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))
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