Filter added to prune files before applying network annotation extractor.

tools/clang/scripts/run_tool.py

 #!/usr/bin/env python
 # Copyright (c) 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.
 """Wrapper script to help run clang tools across Chromium code.
 
 How to use run_tool.py:
 If you want to run a clang tool across all Chromium code:
 run_tool.py <tool> <path/to/compiledb>
 
@@ skipping 184 matching lines @@
       action='store_true',
       help='regenerate the compile database before running the tool')
   parser.add_argument(
       '--shard',
       metavar='<n>-of-<count>')
   parser.add_argument(
       '-p',
       required=True,
       help='path to the directory that contains the compile database')
   parser.add_argument(
+      '--source-filenames',
+      help='optional path to a file including filenames to process')
+  parser.add_argument(
       'path_filter',
       nargs='*',
       help='optional paths to filter what files the tool is run on')
   parser.add_argument(
       '--tool-args', nargs='*',
       help='optional arguments passed to the tool')
   args = parser.parse_args()
 
   os.environ['PATH'] = '%s%s%s' % (
       os.path.abspath(os.path.join(
           os.path.dirname(__file__),
           '../../../third_party/llvm-build/Release+Asserts/bin')),
       os.pathsep,
       os.environ['PATH'])
 
   if args.generate_compdb:
     with open(os.path.join(args.p, 'compile_commands.json'), 'w') as f:
       f.write(compile_db.GenerateWithNinja(args.p))
 
   if args.all:
     source_filenames = set(_GetFilesFromCompileDB(args.p))
+  elif args.source_filenames:
+    source_filenames = open(args.source_filenames, 'r').read().split('\n')
   else:
     git_filenames = set(_GetFilesFromGit(args.path_filter))
     # Filter out files that aren't C/C++/Obj-C/Obj-C++.
     extensions = frozenset(('.c', '.cc', '.cpp', '.m', '.mm'))
     source_filenames = [f
                         for f in git_filenames
                         if os.path.splitext(f)[1] in extensions]
 
   if args.shard:
     total_length = len(source_filenames)
@@ skipping 10 matching lines @@
 
   dispatcher = _CompilerDispatcher(args.tool, args.tool_args,
                                    args.p,
                                    source_filenames)
   dispatcher.Run()
   return -dispatcher.failed_count
 
 
 if __name__ == '__main__':
   sys.exit(main())