Add first changes needed for OWNERS file support.

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 606 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 []
+
+
+def CheckOwners(input_api, output_api):
+  affected_files = set(input_api.change.AffectedFiles())
+  owners_db = input_api.owners_db
+
+  if input_api.is_commiting:
+    approving_reviewers = _GetApproversFor(input_api)
+    missing_files = owners_db.FilesNotCoveredBy(affected_files,
+                                                approving_reviewers):
+    if missing_files:
+        return [output_api.PresubmitPromptWarning('Missing approvals for: %s' %
+                ','.join(missing_files)]
+    return []
+  else:
+    suggested_reviewers = owners_db.OwnersFor(affected_files)[0]
+    _AddReviewers(suggested_reviewers)
+
+def _GetApproversFor(input_api)
+  # TODO: implement - copy from the lgtm verifier, add support for
+  # "defer to".
+  return ['maruel']

[M-A Ruel, 2011/02/24 16:25:57]

I know it's an example but it should use fully qualified email?

+
+def _AddReviewers(input_api):

[M-A Ruel, 2011/02/24 16:25:57]

This will need to be in presubmit_support.Change.

+  # TODO: implement?
+  pass