scm.SVN.GenerateDiff() expects an array.

presubmit_support.py

 #!/usr/bin/python
 # Copyright (c) 2010 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.
 
 """Enables directory-specific presubmit checks to run at upload and/or commit.
 """
 
 __version__ = '1.3.5'
 
@@ skipping 540 matching lines @@
         self._is_text_file = False
       elif self.IsDirectory():
         self._is_text_file = False
       else:
         mime_type = scm.SVN.GetFileProperty(self.AbsoluteLocalPath(),
                                             'svn:mime-type')
         self._is_text_file = (not mime_type or mime_type.startswith('text/'))
     return self._is_text_file
 
   def GenerateScmDiff(self):
-    return scm.SVN.GenerateDiff(self.AbsoluteLocalPath())
+    return scm.SVN.GenerateDiff([self.AbsoluteLocalPath()])
+
 
 class GitAffectedFile(AffectedFile):
   """Representation of a file in a change out of a git checkout."""
   # Method 'NNN' is abstract in class 'NNN' but is not overridden
   # pylint: disable=W0223
 
   def __init__(self, *args, **kwargs):
     AffectedFile.__init__(self, *args, **kwargs)
     self._server_path = None
     self._is_text_file = None
@@ skipping 585 matching lines @@
                                options.commit,
                                options.verbose,
                                sys.stdout,
                                sys.stdin,
                                options.default_presubmit,
                                options.may_prompt)
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))