Features 11017 and 11018: setup of mgmt cluster and git repo

This change incorporates the changes to setup a mgmt cluster for
cloud-native operations in OSM following a GitOps model, which includes
the setup of an internal git repository.

Change-Id: If828d18ad64d852a9a89ec9ba7c2d3a96d281565
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/installers/mgmt-cluster/flux/scripts/helper-functions.rc b/installers/mgmt-cluster/flux/scripts/helper-functions.rc
new file mode 100644
index 0000000..adc326d
--- /dev/null
+++ b/installers/mgmt-cluster/flux/scripts/helper-functions.rc
@@ -0,0 +1,34 @@
+#!/bin/bash
+#######################################################################################
+# Copyright ETSI Contributors and Others.
+#
+# 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.
+#######################################################################################
+
+
+# Helper function to encrypt secrets in-place in manifest file
+function encrypt_secret_inplace() {
+  local FILE="$1"
+  local AGE_KEY_NAME=${AGE_KEY_NAME_MGMT:-"$2"}
+
+  # Load the contents of both keys
+  local PUBLIC_KEY=$(<"${CREDENTIALS_DIR}/${AGE_KEY_NAME}.pub")
+  # local PRIVATE_KEY=$(<"${CREDENTIALS_DIR}/${AGE_KEY_NAME}.key")
+
+  sops \
+    --age=${PUBLIC_KEY} \
+    --encrypt \
+    --encrypted-regex '^(data|stringData)$' \
+    --in-place "${FILE}"
+}