Change the way we generate versions

ppapi/generators/generator.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 import os
 import sys
 
 # Note: some of these files are imported to register cmdline options.
 from idl_generator import Generator
@@ skipping 18 matching lines @@
     script_dir = os.path.abspath(os.path.dirname(__file__))
     if current_dir != script_dir:
       print '\nIncorrect CWD, default run skipped.'
       print 'When running with no arguments set CWD to the scripts directory:'
       print '\t' + script_dir + '\n'
       print 'This ensures correct default paths and behavior.\n'
       return 1
 
   filenames = ParseOptions(args)
   ast = ParseFiles(filenames)
+  if ast.errors:
+    print 'Found %d errors.  Aborting build.\n' % ast.errors
+    return 1
   return Generator.Run(ast)
 
 
 if __name__ == '__main__':
   sys.exit(Main())
+