Add script to generate yaml files from helm

hack/add-namespace.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+
+# Copyright 2020 The Kubernetes Authors.
+#
+# 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.
+
+import sys
+
+from ruamel.yaml import YAML
+
+yaml=YAML()
+yaml.indent(mapping=2, sequence=4, offset=2)
+
+for manifest in yaml.load_all(sys.stdin.read()):
+    if manifest:
+        # helm template does not have support for namespace declaration
+        if 'metadata' in manifest and 'namespace' not in manifest['metadata']:
+            manifest['metadata']['namespace'] = sys.argv[1]
+
+        # respect existing replicas definition
+        if 'spec' in manifest and 'replicas' in manifest['spec']:
+            del manifest['spec']['replicas']
+
+        print('---')
+        yaml.dump(manifest, sys.stdout)