new way of doin

helm-charts/dashy/charts/common/templates/lib/configmap/_validation.tpl

@@ -0,0 +1,21 @@
+{{/* Configmap Validation */}}
+{{/* Call this template:
+{{ include "tc.v1.common.lib.configmap.validation" (dict "objectData" $objectData) -}}
+objectData:
+  labels: The labels of the configmap.
+  annotations: The annotations of the configmap.
+  data: The data of the configmap.
+*/}}
+
+{{- define "tc.v1.common.lib.configmap.validation" -}}
+  {{- $objectData := .objectData -}}
+
+  {{- if not $objectData.data -}}
+    {{- fail "ConfigMap - Expected non-empty <data>" -}}
+  {{- end -}}
+
+  {{- if not (kindIs "map" $objectData.data) -}}
+    {{- fail (printf "ConfigMap - Expected <data> to be a dictionary, but got [%v]" (kindOf $objectData.data)) -}}
+  {{- end -}}
+
+{{- end -}}