Only generate code for files that are specified, not their imports.

mojo/public/tools/bindings/mojom_bindings_generator_v2.py

 #!/usr/bin/env python
 # Copyright 2015 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.
 
 """This script drives the mojom bindings generation."""
 
 
 import argparse
 import os
@@ skipping 65 matching lines @@
       "--output-dir": args.output_dir,
       "--generators": args.generators_string,
       "--depth": args.depth,
       }
 
   if args.python_sdk_dir:
     cmd_args["--python-sdk-dir"] = args.python_sdk_dir
 
   for name, value in cmd_args.iteritems():
     cmd.extend([name, value])
+  if args.no_gen_imports:
+    cmd.extend("--no-gen-imports")
 
   # Some language-specific args may be found in remaining_args. See
   # run_code_generators.py and look for GENERATOR_PREFIX for more information.
   cmd.extend(remaining_args)
+  if not args.no_gen_imports:
+    cmd.extend(args.filename)
 
   process = subprocess.Popen(cmd, stdin=subprocess.PIPE)
   process.communicate(serialized_file_graph)
   return process.wait()
 
 
 def main(argv):
   parser = argparse.ArgumentParser(
       description="Generate bindings from mojom files.")
   parser.add_argument("filename", nargs="+",
@@ skipping 12 matching lines @@
   parser.add_argument("-I", dest="import_directories", action="append",
                       metavar="directory", default=[],
                       help="add a directory to be searched for import files")
   parser.add_argument("-mojom-parser", dest="mojom_parser",
                       help="Location of the mojom parser.")
   parser.add_argument("--use_bundled_pylibs", action="store_true",
                       help="use Python modules bundled in the SDK")
   parser.add_argument("-p", "--python-sdk-dir", dest="python_sdk_dir",
                       help="Location of the compiled python bindings",
                       default="")
+  parser.add_argument("--no-gen-imports", action="store_true",
+                      help="Generate code only for the files that are "
+                      "specified on the command line. By default, code "
+                      "is generated for all specified files and their "
+                      "transitive imports.")
   (args, remaining_args) = parser.parse_known_args(argv)
 
   serialized_file_graph = RunParser(args)
 
   if serialized_file_graph:
     return RunGenerators(serialized_file_graph, args, remaining_args)
   return 1
 
 
 if __name__ == "__main__":
   sys.exit(main(sys.argv[1:]))