Add "PostRendererArgs" option to be passed to helm (#1133)

* Add "PostRendererArgs" option to be passed to helm

This allows using PowerShell scripts on Windows as Post Renderer.

Signed-off-by: Maarten Boekhold <maarten.boekhold@finastra.com>

test/integration/test-cases/postrender/input/add-cm.bash

@@ -1,13 +1,13 @@
 #!/usr/bin/env bash
-
-cat $1
+configmap_name=$1
+cat
 echo "---"
 
 cat <<EOS
 apiVersion: v1
 kind: ConfigMap
 data:
-  one: ONE
+  name: ${configmap_name} 
 metadata:
-  name: cm1
+  name: ${configmap_name} 
 EOS

test/integration/test-cases/postrender/input/add-cm2.bash

@@ -1,13 +0,0 @@
-#!/usr/bin/env bash
-
-cat $1
-echo "---"
-
-cat <<EOS
-apiVersion: v1
-kind: ConfigMap
-data:
-  two: TWO
-metadata:
-  name: cm2
-EOS

test/integration/test-cases/postrender/input/helmfile.yaml

@@ -21,7 +21,9 @@ releases:
           namespace: {{`{{ .Release.Namespace }}`}}
         data:
           bar: BAR
-  postRenderer: ./add-cm2.bash
+  postRenderer: ./add-cm.bash
+  postRendererArgs: 
+    - cm2
 - name: baz
   chart: ../../../charts/raw
   values: