Add script to validate installed Android SDK packages

build/check_play_services_version.py

Index: build/check_play_services_version.py
diff --git a/build/check_play_services_version.py b/build/check_play_services_version.py
new file mode 100755
index 0000000000000000000000000000000000000000..de5696ba60c677707323c0a3ff2b6d03e8408303
--- /dev/null
+++ b/build/check_play_services_version.py
@@ -0,0 +1,101 @@
+#!/usr/bin/env 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.
+
+'''Checks the status of an android SDK package.
+
+Verifies the given package has been installed from the Android SDK Manager and
+that it is at an appropriate version. Prints only when there is an error.
+'''
+
+import argparse
+import os
+import re
+import json
+
+UDPATE_SCRIPT_PATH = 'build/install-build-deps-android.sh'
+
+SDK_EXTRAS_JSON_FILE = os.path.join(os.path.dirname(__file__),
+                                    'android_sdk_extras.json')
+
+REPO_NOT_FOUND_MSG = ('Could not find the Google Play services package in '
+                      '{checked_location}. Please run {script} to download it. '
+                      'You might have to run it as root.')
+UPDATE_NEEDED_MSG = ('Google Play services package version {required_version} '

[cjhopman, 2015/05/22 20:25:22]

Places in this file explicitly refer to google play services as the package and
other places refer to m2repo. These references should be made generic if we want
this to be used for different packages.

[dgn, 2015/06/08 14:34:10]

Done.

+                     'is required. Version {actual_version} found. Please run '
+                     '{script} to update it. You might have to run it as root.')
+REQUIRED_VERSION_ERROR_MSG = ('Could not retrieve the required Google Play '
+                              'services package version.')
+
+BOLD_STYLE = '\033[1m'

[cjhopman, 2015/05/22 20:25:22]

I don't think I'd hardcode in these escape codes. You could use
third_party/colorama if you really want to style the output.

[dgn, 2015/06/08 14:34:09]

Done.

+END_STYLE = '\033[0m'
+
+def print_and_exit(msg):

[cjhopman, 2015/05/22 20:25:22]

python functions use CapWords() style

[dgn, 2015/06/08 14:34:09]

Done.

+  """Should always exit with a success code for gyp to pick up the message. """
+  print('---------------\n')
+  print(BOLD_STYLE + msg + END_STYLE)
+  print('\n---------------')
+  exit(0)
+
+
+def parse_args():
+  parser = argparse.ArgumentParser(description=__doc__)
+  parser.add_argument('package_id',
+                      help=('Id of the package to check for. The list of '
+                            'possible ids can be obtained by running '
+                            'third_party/android_tools/sdk/tools/android list '
+                            'sdk --extended'))
+  parser.add_argument('package_location',
+                      help=('Absolute path to the expected install location of '
+                            'the package'))
+
+  return parser.parse_args()
+
+
+def get_required_version(package_id):
+  with open(SDK_EXTRAS_JSON_FILE, 'r') as json_file:
+    packages = json.load(json_file)
+
+  for package in packages:
+    if package['package_id'] == package_id:
+      return int(package['version'].split('.')[0])
+
+  print_and_exit(REQUIRED_VERSION_ERROR_MSG)
+
+
+def check_m2repo_version(location, required_version):
+  version_file_path = os.path.join(location, 'source.properties')
+  # Extracts the version of the package described by the property file. We only
+  # care about the major version number here.
+  version_pattern = re.compile(r'^Pkg\.Revision=(?P<version>\d+).*$',
+                               re.MULTILINE)
+
+  if not os.path.isdir(location) or not os.path.isfile(version_file_path):
+    print_and_exit(REPO_NOT_FOUND_MSG.format(
+      checked_location=location,
+      script=UDPATE_SCRIPT_PATH))
+
+  with open(version_file_path, 'r') as f:
+    match = version_pattern.search(f.read())
+
+    if not match:
+      print_and_exit(REPO_NOT_FOUND_MSG.format(
+        checked_location=location,
+        script=UDPATE_SCRIPT_PATH))
+
+    pkg_version = int(match.group('version'))
+    if pkg_version < required_version:
+      print_and_exit(UPDATE_NEEDED_MSG.format(
+        required_version=required_version,
+        actual_version=pkg_version,
+        script=UDPATE_SCRIPT_PATH))
+
+  # Everything looks ok, print nothing.
+
+
+if __name__ == '__main__':
+  args = parse_args()
+  required_version = get_required_version(args.package_id)
+  check_m2repo_version(args.package_location, required_version)
+  exit(0)