[WIP][NotForLand] IDL dictionary support

Source/bindings/scripts/aggregate_generated_dictionaries.py

Index: Source/bindings/scripts/aggregate_generated_dictionaries.py
diff --git a/Source/bindings/scripts/aggregate_generated_dictionaries.py b/Source/bindings/scripts/aggregate_generated_dictionaries.py
new file mode 100644
index 0000000000000000000000000000000000000000..c736b4bb3dd25d54570a7eef2aa5458f5f258d04
--- /dev/null
+++ b/Source/bindings/scripts/aggregate_generated_dictionaries.py
@@ -0,0 +1,61 @@
+# 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.
+
+"""Aggregate generated dictionary impl classes.
+
+Usage:
+aggregate_generated_dictionaries.py COMPONENT_DIR INTERFACES_INFO OUTPUT_FILE
+
+COMPONENT_DIR is the name of a component, i.e., 'core' or 'modules'.
+INTERFACES_INFO is a pickle file generated by compute_interfaces_info_overall.py.
+OUTPUT_FILE is the filename of output.
+"""
+
+import cPickle as pickle
+import posixpath
+import sys
+from utilities import write_file
+
+
+COPYRIGHT = """// 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.
+
+"""
+
+
+def generate_path(interface_name, interface_info):
+    return posixpath.join(interface_info['relative_dir'],
+                          '%s.cpp' % interface_name)
+
+
+def generate_content(generated_paths):
+    output = [COPYRIGHT,
+              '#define NO_IMPLICIT_ATOMICSTRING\n\n']
+    output.extend('#include "%s"\n' % generated_path
+                  for generated_path in sorted(generated_paths))
+    return ''.join(output)
+
+
+def main(args):
+    # FIXME: we might want to accept multiple output files.
+    if len(args) != 4:
+        raise Exception('Expected 3 arguments.')
+    component_dir = args[1]
+    interfaces_info_file_name = args[2]
+    output_file_name = args[3]
+    with open(interfaces_info_file_name) as interfaces_info_file:
+        interfaces_info = pickle.load(interfaces_info_file)
+
+    generated_paths = [
+        generate_path(interface_name, interface_info)
+        for interface_name, interface_info in interfaces_info.iteritems()
+        if (interface_info['component_dir'] == component_dir and
+            interface_info['is_dictionary'])]
+    contents = generate_content(generated_paths)
+    write_file(contents, output_file_name, only_if_changed=True)
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))