octodns-compare: Prefix filtering and status code on configuration mismatch

octodns/cmds/compare.py

@@ -7,6 +7,7 @@ from __future__ import absolute_import, division, print_function, \
     unicode_literals
 
 from pprint import pprint
+import sys
 
 from octodns.cmds.args import ArgumentParser
 from octodns.manager import Manager
@@ -23,13 +24,25 @@ def main():
                         help='Second source(s) to pull data from')
     parser.add_argument('--zone', default=None, required=True,
                         help='Zone to compare')
-
+    parser.add_argument('--ignore-prefix', default=None, required=False,
+                        help='Record prefix to ignore from list of changes')
     args = parser.parse_args()
 
     manager = Manager(args.config_file)
     changes = manager.compare(args.a, args.b, args.zone)
+
+    # Filter changes list based on ignore-prefix argument if present
+    if args.ignore_prefix:
+        pattern = args.ignore_prefix
+        changes = [c for c in changes
+                   if not c.record.fqdn.startswith(pattern)]
+
     pprint(changes)
 
+    # Exit with non-zero exit code if changes exist
+    if len(changes):
+        sys.exit(1)
+
 
 if __name__ == '__main__':
     main()