refactor external clusters to a helper

charts/postgres-cluster/templates/_external_clusters.tpl

@@ -0,0 +1,24 @@
+{{- define "cluster.externalClusters" -}}
+externalClusters:
+{{- if eq .Values.mode "standalone" }}
+{{- else if eq .Values.mode "recovery" }}
+  {{- if eq .Values.recovery.method "pgBaseBackup" }}
+  - name: pgBaseBackupSource
+     {{- include "cluster.externalSourceCluster" .Values.recovery.pgBaseBackup.source | nindent 4 }}
+  {{- else if eq .Values.recovery.method "import" }}
+  - name: importSource
+     {{- include "cluster.externalSourceCluster" .Values.recovery.import.source | nindent 4 }}
+  {{- else if eq .Values.recovery.method "objectStore" }}
+  - name: {{ include "cluster.recoveryServerName" . }}
+    plugin:
+      name: barman-cloud.cloudnative-pg.io
+      enabled: true
+      isWALArchiver: false
+      barmanObjectStore:
+        barmanObjectName: "{{ include "cluster.name" . }}-{{ .Values.recovery.objectStore.name }}"
+        serverName: {{ include "cluster.recoveryServerName" . }}
+  {{- end }}
+{{- else }}
+  {{ fail "Invalid cluster mode!" }}
+{{- end }}
+{{ end }}