add mode to list-deliverables to show repo names

Sometimes we want the repository names, not the deliverable names. Add a
switch to list-deliverables to give that output.

Change-Id: Iaf0cd77237c0b1892aaa0864eb356012c57f036c
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

openstack_releases/cmds/list_deliverables.py

@@ -21,12 +21,19 @@ from openstack_releases import deliverable
 
 def main():
     parser = argparse.ArgumentParser()
-    parser.add_argument(
+    output_mode = parser.add_mutually_exclusive_group()
+    output_mode.add_argument(
         '-v', '--verbose',
         action='store_true',
         default=False,
         help='show more than the deliverable name',
     )
+    output_mode.add_argument(
+        '-r', '--repos',
+        action='store_true',
+        default=False,
+        help='show the repository names not deliverable names',
+    )
     parser.add_argument(
         '--team',
         help='the name of the project team, such as "Nova" or "Oslo"',
@@ -128,5 +135,8 @@ def main():
             continue
         if args.verbose:
             print('{:30} {:15} {}'.format(deliv.name, deliv.latest_release, deliv.team))
+        elif args.repos:
+            for r in sorted(deliv.repos):
+                print(r)
         else:
             print(deliv.name)