Support passing files/directories to git cl format

presubmit_canned_checks.py

 # 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.
 
 """Generic presubmit checks that can be reused by other presubmit checks."""
 
 import os as _os
 _HERE = _os.path.dirname(_os.path.abspath(__file__))
 
 
@@ skipping 1027 matching lines @@
         input_api, output_api))
     snapshot("checking do not submit in files")
     results.extend(input_api.canned_checks.CheckDoNotSubmitInFiles(
         input_api, output_api))
   snapshot("done")
   return results
 
 
 def CheckPatchFormatted(input_api, output_api):
   import git_cl
-  code, _ = git_cl.RunGitWithCode(['cl', 'format', '--dry-run'],
-                                    suppress_stderr=True)
+  cmd = ['cl', 'format', '--dry-run', input_api.PresubmitLocalPath()]
+  code, _ = git_cl.RunGitWithCode(cmd, suppress_stderr=True)
   if code == 2:
     return [output_api.PresubmitPromptWarning(
       'Your patch is not formatted, please run git cl format.')]
   # As this is just a warning, ignore all other errors if the user
   # happens to have a broken clang-format, doesn't use git, etc etc.
   return []