add digdelv +yaml system tests

bin/tests/system/digdelv/yamlget.py

@@ -0,0 +1,33 @@
+############################################################################
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+############################################################################
+
+try:
+    import yaml
+except:
+    print("No python yaml module, skipping")
+    exit(1)
+
+import subprocess
+import pprint
+import sys
+
+f = open(sys.argv[1], "r")
+for item in yaml.safe_load_all(f):
+    for key in sys.argv[2:]:
+        try:
+            key = int(key)
+        except: pass
+        try:
+            item = item[key]
+        except:
+            print('error: index not found')
+            exit(1)
+    print (item)