Added tool to reset backport-potential tags once backports are merged

Change-Id: I27689231e22807fe5487b61573130087d0d659db

README.rst

@@ -940,3 +940,13 @@ Example::
   ./bugs-fixed-since.py --start=8.0.0 | ./annotate-lp-bugs neutron
 
 Pull in detailed description for bugs that are fixed in master since 8.0.0.
+
+
+lp-reset-backport-potential.py
+------------------------------
+
+Clean up <*>-backport-potential tags for bugs with in-stable-<*> tag set.
+
+Example::
+
+  ./lp-reset-backport-potential.py neutron python-neutronclient

lp-reset-backport-potential.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+"""
+This Launchpad tool is used to reset <release>-backport-potential tags once
+backports are merged.
+"""
+
+import argparse
+
+from launchpadlib.launchpad import Launchpad
+
+
+RELEASES = ('liberty', 'mitaka')
+
+
+def _parse_args():
+    parser = argparse.ArgumentParser(
+        description='Reset -backport-potential tags for closed bugs.')
+    parser.add_argument(
+        'projects', metavar='N', type=str, nargs='+',
+        help='Launchpad project names')
+    return parser.parse_args()
+
+
+def _cleanup_project(lp, project):
+    print('Processing project %s...' % project)
+    for release in RELEASES:
+        in_tag = 'in-stable-%s' % release
+        potential_tag = '%s-backport-potential' % release
+
+        for task in lp.projects[project].searchTasks(tags=[potential_tag]):
+            bug = task.bug
+            tags = bug.tags
+
+            if in_tag in tags:
+                print("Removing %s tag for %s" % (potential_tag, bug))
+                tags.remove(potential_tag)
+                bug.tags = tags
+                bug.lp_save()
+
+
+def main():
+    args = _parse_args()
+
+    lp = Launchpad.login_with('openstack-releasing', 'production')
+
+    for project in args.projects:
+        _cleanup_project(lp, project)
+
+
+if __name__ == '__main__':
+    main()