allow tpl for postgresql secret

charts/stable/postgresql/Chart.yaml

@@ -3,7 +3,7 @@ appVersion: auto
 dependencies:
 - name: common
   repository: https://truecharts.org/
-  version: 6.9.2
+  version: 6.10.3
 deprecated: false
 description: PostgresSQL
 home: https://github.com/truecharts/apps/tree/master/stable/postgres
@@ -25,4 +25,4 @@ name: postgresql
 sources:
 - https://www.postgresql.org/
 type: application
-version: 1.1.3
+version: 1.2.0

charts/stable/postgresql/values.yaml

@@ -34,13 +34,13 @@ persistence:
 postgresqlPassword: "testpass"
 postgresqlUsername: "test"
 postgresqlDatabase: "test"
-# existingSecret: ""
+existingSecret: ""
 
 
 envValueFrom:
   POSTGRES_PASSWORD:
     secretKeyRef:
-      name: '{{ .Values.existingSecret | default ( include "common.names.fullname" . ) }}'
+      name: '{{ ( tpl .Values.existingSecret $ ) | default ( include "common.names.fullname" . ) }}'
       key: "postgresql-password"
 
 envTpl: