When the tree is closed, it's closed.

presubmit_canned_checks.py

 # 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.
 
 """Generic presubmit checks that can be reused by other presubmit checks."""
 
 ### Description checks
 
 def CheckChangeHasTestField(input_api, output_api):
   """Requires that the changelist have a TEST= field."""
@@ skipping 334 matching lines @@
   """Checks that an url's content doesn't match a regexp that would mean that
   the tree is closed."""
   if not input_api.is_committing:
     return []
   try:
     connection = input_api.urllib2.urlopen(url)
     status = connection.read()
     connection.close()
     if input_api.re.match(closed, status):
       long_text = status + '\n' + url
-      return [output_api.PresubmitPromptWarning('The tree is closed.',
-                                                long_text=long_text)]
+      return [output_api.PresubmitError('The tree is closed dude!',
+                                        long_text=long_text)]
   except IOError:
     pass
   return []
 
 
 def RunPythonUnitTests(input_api, output_api, unit_tests):
   """Run the unit tests out of process, capture the output and use the result
   code to determine success.
   """
   # We don't want to hinder users from uploading incomplete patches.
@@ skipping 121 matching lines @@
     pending_builds_len = len(builder.get('pending_builds', []))
     if pending_builds_len > max_pendings:
       out.append('%s has %d build(s) pending' %
                   (builder_name, pending_builds_len))
   if out:
     return [output_api.PresubmitPromptWarning(
         'Build(s) pending. It is suggested to wait that no more than %d '
             'builds are pending.' % max_pendings,
         long_text='\n'.join(out))]
   return []