Translate some ant to python

build/android/dex.py

Index: build/android/dex.py
diff --git a/build/android/dex.py b/build/android/dex.py
new file mode 100755
index 0000000000000000000000000000000000000000..a447a993b637dbdcb3c6495da500832829f03475
--- /dev/null
+++ b/build/android/dex.py
@@ -0,0 +1,41 @@
+#!/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.
+
+import fnmatch
+import optparse
+import os
+import subprocess
+import sys
+
+from pylib import build_utils
+
+
+def DoDex(options, paths):
+  dx_binary = os.path.join(options.android_sdk_root, 'platform-tools', 'dx')
+  dex_cmd = [dx_binary, '--dex', '--output', options.dex_path] + paths
+  subprocess.check_call(dex_cmd)
+
+
+def main(argv):
+  parser = optparse.OptionParser()
+  parser.add_option('--android-sdk-root', help='Android sdk root directory.')
+  parser.add_option('--dex-path', help='Dex output path.')
+  parser.add_option('--stamp', help='Path to touch on success.')
+
+  # TODO(newt): remove this once http://crbug.com/177552 is fixed in ninja.
+  parser.add_option('--ignore', help='Ignored.')
+
+  options, paths = parser.parse_args()
+
+  DoDex(options, paths)
+
+  if options.stamp:
+    build_utils.Touch(options.stamp)
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))
+