Making license presubmit check more verbose.

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):
@@ skipping 291 matching lines @@
     if accept_empty_files and not contents:
       continue
     if not license_re.search(contents):
       bad_files.append(f.LocalPath())
   if bad_files:
     if input_api.is_committing:
       res_type = output_api.PresubmitPromptWarning
     else:
       res_type = output_api.PresubmitNotifyResult
     return [res_type(
+        'License must match:\n%s\n' % license_re.pattern +
         'Found a bad license header in these files:', items=bad_files)]
   return []
 
 
 def CheckChangeSvnEolStyle(input_api, output_api, source_file_filter=None):
   """Checks that the source files have svn:eol-style=LF."""
   return CheckSvnProperty(input_api, output_api,
                           'svn:eol-style', 'LF',
                           input_api.AffectedSourceFiles(source_file_filter))
 
@@ skipping 507 matching lines @@
       input_api, output_api, source_file_filter=text_files))
   results.extend(input_api.canned_checks.CheckSvnForCommonMimeTypes(
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckLicense(
       input_api, output_api, license_header, source_file_filter=sources))
   results.extend(_CheckConstNSObject(
       input_api, output_api, source_file_filter=sources))
   results.extend(_CheckSingletonInHeaders(
       input_api, output_api, source_file_filter=sources))
   return results