add --debug option to validate

Add a --debug option to the validate command line app to have it throw
an exception when there is an error so we can pinpoint where the error
is coming from more easily.

Change-Id: I2f9a23d99105e59985327fce596f77bd3f6e8293
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

openstack_releases/cmds/validate.py

@@ -816,6 +816,12 @@ def main():
         action='store_false',
         help='do not remove temporary files',
     )
+    parser.add_argument(
+        '--debug',
+        default=False,
+        action='store_true',
+        help='throw exception on error',
+    )
     parser.add_argument(
         'input',
         nargs='*',
@@ -872,6 +878,8 @@ def main():
         def mk_error(msg):
             print('ERROR: {}'.format(msg))
             errors.append('{}: {}'.format(filename, msg))
+            if args.debug:
+                raise RuntimeError(msg)
 
         validate_schema(deliverable_info, mk_warning, mk_error)
         validate_bugtracker(deliverable_info, mk_warning, mk_error)