[Android] Add process_resources.py to build Android library resources.

build/android/process_resources.py

+#!/usr/bin/env python
+#
+# Copyright (c) 2012 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.
+
+"""Process Android library resources to generate R.java and crunched images."""
+
+import optparse
+import os
+import subprocess
+import sys
+
+
+REQUIRED_VARIABLES = ['ANDROID_JAR', 'AAPT', 'DUMMY_MANIFEST', 'RES_DIR',
+                      'CRUNCHED_RES_DIR', 'R_PACKAGE', 'R_DIR']
+
+
+def parse_args():
+  parser = optparse.OptionParser()
+  parser.add_option('-D', action='append', dest='defines',

[cjhopman, 2012/12/11 16:54:29]

I'd prefer that each of the required variables were its own regular python
option. I think it will make both the python and gyp files cleaner.

+                    help='define variable NAME to be VALUE',
+                    metavar='NAME=VALUE', default=[])
+  (options, args) = parser.parse_args()
+
+  defines = {}
+  for define in options.defines:
+    name, _, value = define.partition('=')
+    if name not in REQUIRED_VARIABLES:
+      parser.error('Unknown variable defined: {0}'.format(name))
+    defines[name] = value
+
+  missing_variables = set(REQUIRED_VARIABLES).difference(defines.keys())
+  if missing_variables:
+    parser.error('No definitions for required variables: {0}'
+                 .format(sorted(missing_variables)))
+
+  return defines
+
+
+def main():
+  defines = parse_args()
+
+  # Generate R.java.
+  subprocess.check_call([defines['AAPT'],
+                         'package',
+                         '-m',
+                         '--non-constant-id',
+                         '--custom-package', defines['R_PACKAGE'],
+                         '-M', defines['DUMMY_MANIFEST'],
+                         '-S', defines['RES_DIR'],
+                         '-I', defines['ANDROID_JAR'],
+                         '-J', defines['R_DIR']])
+
+  # Crunch image resources.
+  subprocess.check_call([defines['AAPT'],
+                         'crunch',
+                         '-S', defines['RES_DIR'],
+                         '-C', defines['CRUNCHED_RES_DIR']])
+
+
+if __name__ == '__main__':
+  main()