Check in generated Dart bindings and add presubmit script

mojo/public/tools/bindings/mojom_list_dart_outputs.py

+#!/usr/bin/env python
+# Copyright 2014 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.
+
+"""Generates the list of dart source file outputs from a mojom.Module."""
+
+import argparse
+import os
+import re
+import shutil
+import sys
+
+SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
+sys.path.insert(0, os.path.join(SCRIPT_DIR, 'pylib'))
+
+from mojom.error import Error
+from mojom.parse.parser import Parse
+from mojom.parse.translate import Translate
+
+def mojom_path(name, namespace, attributes):
+  package_name = attributes['DartPackage']
+  if package_name == None:
+    package_name = 'mojom'
+  elements = [package_name, 'lib']
+  elements.extend(namespace.split('.'))
+  elements.append("%s.dart" % name)
+  return os.path.join(*elements)
+
+
+def process_mojom(path_to_mojom):
+  filename = os.path.abspath(path_to_mojom)
+  name = os.path.basename(filename)
+
+  # Read in mojom file.
+  try:
+    with open(filename) as f:
+      source = f.read()
+  except IOError:
+    print("Error reading %s" % filename)
+    sys.exit(2)
+
+  # Parse
+  try:
+    tree = Parse(source, name)
+  except Error:
+    print("Error parsing %s" % filename)
+    sys.exit(2)
+
+  mojom = Translate(tree, name)
+
+  # Output path
+  print(mojom_path(mojom['name'], mojom['namespace'], mojom['attributes']))
+
+
+def main():
+  parser = argparse.ArgumentParser(description='Output list of ')
+  parser.add_argument('--mojoms',
+                      metavar='mojoms',
+                      nargs='+',
+                      required=True)
+  args = parser.parse_args()
+
+  for mojom in args.mojoms:
+    process_mojom(mojom)
+
+  return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())