Use mojo's scripts for downloading android tools on the bots

R=abarth@chromium.org

infra/.gitignore

 .recipe_deps
 dart-sdk
+android_tools
+*.pyc

infra/VERSION_LINUX_NDK

+7b727f0d4c853c9848847839a317300cb83f4ece

infra/VERSION_LINUX_SDK

+0d320c50b0ed188c7e1182388e2beb623a1d307d

infra/VERSION_MACOSX_NDK

+e21479f1ae8d2fac385c3965672c912d08dff280

infra/VERSION_MACOSX_SDK

+fa5ea0ca1e0c7c2e40914f3202c7545de4dbca9c

infra/download_android_tools.py

+#!/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 trimmed-down Android Tools from Google Cloud Storage and extracts
+them to INSTALL_DIR, updating INSTALL_DIR/VERSION_* stamp files with current
+version. Does nothing if INSTALL_DIR/VERSION_* are already up to date.
+"""
+
+import os
+import shutil
+import subprocess
+import sys
+import tarfile
+
+# Path constants. (All of these should be absolute paths.)
+THIS_DIR = os.path.abspath(os.path.dirname(__file__))
+INSTALL_DIR = os.path.join(THIS_DIR, 'android_tools')
+
+import find_depot_tools
+
+DEPOT_PATH = find_depot_tools.add_depot_tools_to_path()
+GSUTIL_PATH = os.path.join(DEPOT_PATH, 'gsutil.py')
+
+def RunCommand(command):
+  """Run command and return success (True) or failure."""
+
+  print 'Running %s' % (str(command))
+  if subprocess.call(command, shell=False) == 0:
+    return True
+  print 'Failed.'
+  return False
+
+def GetInstalledVersion(version_stamp):
+  version_file = os.path.join(INSTALL_DIR, version_stamp)
+  if not os.path.exists(version_file):
+    return None
+  with open(version_file) as f:
+    return f.read().strip()
+
+def VersionStampName(tools_name):
+  if sys.platform.startswith('linux'):
+    return 'VERSION_LINUX_' + tools_name.upper()
+  elif sys.platform == 'darwin':
+    return 'VERSION_MACOSX_' + tools_name.upper()
+  else:
+    raise Exception('Unsupported platform: ' + sys.platform)
+
+def UpdateTools(tools_name):
+  """Downloads zipped tools from Google Cloud Storage and extracts them,
+     stamping current version."""
+
+  # Read latest version.
+  version_stamp = VersionStampName(tools_name)
+  version = ''
+  with open(os.path.join(THIS_DIR, version_stamp)) as f:
+    version = f.read().strip()
+  # Return if installed binaries are up to date.
+  if version == GetInstalledVersion(version_stamp):
+    return
+
+  # Remove the old install directory checked out from git.
+  if os.path.exists(os.path.join(INSTALL_DIR, '.git')):
+    shutil.rmtree(INSTALL_DIR)
+  # Make sure that the install directory exists.
+  if not os.path.exists(INSTALL_DIR):
+    os.mkdir(INSTALL_DIR)
+  # Remove current installation.
+  tools_root = os.path.join(INSTALL_DIR, tools_name)
+  if os.path.exists(tools_root):
+    shutil.rmtree(tools_root)
+
+  # Download tools from GCS.
+  archive_path = os.path.join(INSTALL_DIR, tools_name + '.tar.gz')
+  download_cmd = ['python', GSUTIL_PATH, 'cp',
+                  'gs://mojo/android/tool/%s.tar.gz' % version,
+                  archive_path]
+  if not RunCommand(download_cmd):
+    print ('WARNING: Failed to download Android tools.')
+    return
+
+  print "Extracting Android tools (" + tools_name + ")"
+  with tarfile.open(archive_path) as arch:
+    arch.extractall(INSTALL_DIR)
+  os.remove(archive_path)
+  # Write version as the last step.
+  with open(os.path.join(INSTALL_DIR, version_stamp), 'w+') as f:
+    f.write('%s\n' % version)
+
+def main():
+  UpdateTools('sdk')
+  UpdateTools('ndk')
+
+if __name__ == '__main__':
+  sys.exit(main())

infra/find_depot_tools.py

+# Copyright (c) 2011 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.
+"""Small utility function to find depot_tools and add it to the python path.
+
+Will throw an ImportError exception if depot_tools can't be found since it
+imports breakpad.
+"""
+
+import os
+import sys
+
+
+def IsRealDepotTools(path):
+  return os.path.isfile(os.path.join(path, 'gclient.py'))
+
+
+def add_depot_tools_to_path():
+  """Search for depot_tools and add it to sys.path."""
+  # First look if depot_tools is already in PYTHONPATH.
+  for i in sys.path:
+    if i.rstrip(os.sep).endswith('depot_tools') and IsRealDepotTools(i):
+      return i
+  # Then look if depot_tools is in PATH, common case.
+  for i in os.environ['PATH'].split(os.pathsep):
+    if IsRealDepotTools(i):
+      sys.path.append(i.rstrip(os.sep))
+      return i
+  # Rare case, it's not even in PATH, look upward up to root.
+  root_dir = os.path.dirname(os.path.abspath(__file__))
+  previous_dir = os.path.abspath(__file__)
+  while root_dir and root_dir != previous_dir:
+    i = os.path.join(root_dir, 'depot_tools')
+    if IsRealDepotTools(i):
+      sys.path.append(i)
+      return i
+    previous_dir = root_dir
+    root_dir = os.path.dirname(root_dir)
+  print >> sys.stderr, 'Failed to find depot_tools'
+  return None
+
+add_depot_tools_to_path()
+
+# pylint: disable=W0611
+import breakpad