IDL compiler: Filter files during pre-caching of templates

Source/bindings/scripts/unstable/code_generator_v8.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 179 matching lines @@
     # If file itself executed, cache templates
     try:
         cache_dir = argv[1]
         dummy_filename = argv[2]
     except IndexError as err:
         print 'Usage: %s OUTPUT_DIR DUMMY_FILENAME' % argv[0]
         return 1
 
     # Cache templates
     jinja_env = initialize_jinja_env(cache_dir)
-    for template_filename in os.listdir(templates_dir):
+    template_filenames = [filename for filename in os.listdir(templates_dir)
+                          # Skip .svn, directories, etc.
+                          if filename.endswith(('.cpp', '.h'))]
+    for template_filename in template_filenames:
         jinja_env.get_template(template_filename)
 
     # Create a dummy file as output for the build system,
     # since filenames of individual cache files are unpredictable and opaque
     # (they are hashes of the template path, which varies based on environment)
     with open(dummy_filename, 'w') as dummy_file:
         pass  # |open| creates or touches the file
 
 
 if __name__ == '__main__':
     sys.exit(main(sys.argv))