Vars should expand in ingress/spec/tls/secretName

https://github.com/kubernetes-sigs/kustomize/issues/799

pkg/target/variableref_test.go

@@ -635,6 +635,7 @@ spec:
   tls:
   - hosts:
     - $(DEPLOYMENT_NAME).example.com
+    secretName: $(DEPLOYMENT_NAME).example.com-tls
 `)
 	th.writeF("/app/base/service.yaml", `
 apiVersion: v1
@@ -713,6 +714,7 @@ spec:
   tls:
   - hosts:
     - kustomized-nginx.example.com
+    secretName: kustomized-nginx.example.com-tls
 `)
 }
 

pkg/transformers/config/defaultconfig/varreference.go

@@ -96,6 +96,9 @@ varReference:
 
 - path: spec/tls/hosts
   kind: Ingress
+  
+- path: spec/tls/secretName
+  kind: Ingress
 
 - path: spec/template/spec/containers/args
   kind: Job