From 0d817e09997881ebe3fb4180b98e0f13314f8b27 Mon Sep 17 00:00:00 2001
From: Evan Anderson <argent@google.com>
Date: Sat, 8 Dec 2018 00:32:50 +0000
Subject: [PATCH] Fix #673: add support for status.domainInternal

---
 .../eventing/subscription/reconcile.go        | 16 ++++---
 .../eventing/subscription/reconcile_test.go   | 44 +++++++++++++++++++
 2 files changed, 54 insertions(+), 6 deletions(-)

diff --git a/pkg/controller/eventing/subscription/reconcile.go b/pkg/controller/eventing/subscription/reconcile.go
index 87dfce24be8..62922355920 100644
--- a/pkg/controller/eventing/subscription/reconcile.go
+++ b/pkg/controller/eventing/subscription/reconcile.go
@@ -224,15 +224,19 @@ func (r *reconciler) resolveSubscriberSpec(namespace string, s v1alpha1.Subscrib
 		return "", err
 	}
 	t := duckv1alpha1.AddressableType{}
-	err = duck.FromUnstructured(obj, &t)
-	if err != nil {
-		glog.Warningf("Failed to deserialize legacy target: %s", err)
-		return "", err
+	if err := duck.FromUnstructured(obj, &t); err == nil {
+		if t.Status.Address != nil {
+			return domainToURL(t.Status.Address.Hostname), nil
+		}
 	}
 
-	if t.Status.Address != nil {
-		return domainToURL(t.Status.Address.Hostname), nil
+	legacy := duckv1alpha1.LegacyTarget{}
+	if err := duck.FromUnstructured(obj, &legacy); err == nil {
+		if legacy.Status.DomainInternal != "" {
+			return domainToURL(legacy.Status.DomainInternal), nil
+		}
 	}
+
 	return "", fmt.Errorf("status does not contain address")
 }
 
diff --git a/pkg/controller/eventing/subscription/reconcile_test.go b/pkg/controller/eventing/subscription/reconcile_test.go
index b0737db271f..bd74767c365 100644
--- a/pkg/controller/eventing/subscription/reconcile_test.go
+++ b/pkg/controller/eventing/subscription/reconcile_test.go
@@ -416,6 +416,50 @@ var testCases = []controllertesting.TestCase{
 				},
 			},
 		},
+	}, {
+		Name: "new subscription: adds status, target points to the legacy targetable interface",
+		InitialState: []runtime.Object{
+			Subscription().EmptyNonNilReply(),
+		},
+		// TODO: JSON patch is not working on the fake, see
+		// https://github.com/kubernetes/client-go/issues/478. Marking this as expecting a specific
+		// failure for now, until upstream is fixed.
+		WantResult: reconcile.Result{},
+		WantPresent: []runtime.Object{
+			Subscription().ReferencesResolved().PhysicalSubscriber(targetDNS).EmptyNonNilReply(),
+		},
+		WantErrMsg: "invalid JSON document",
+		Scheme:     scheme.Scheme,
+		Objects: []runtime.Object{
+			// Source channel
+			&unstructured.Unstructured{
+				Object: map[string]interface{}{
+					"apiVersion": eventingv1alpha1.SchemeGroupVersion.String(),
+					"kind":       channelKind,
+					"metadata": map[string]interface{}{
+						"namespace": testNS,
+						"name":      fromChannelName,
+					},
+					"spec": map[string]interface{}{
+						"subscribable": map[string]interface{}{},
+					},
+				},
+			},
+			// Subscriber (using knative route)
+			&unstructured.Unstructured{
+				Object: map[string]interface{}{
+					"apiVersion": "serving.knative.dev/v1alpha1",
+					"kind":       routeKind,
+					"metadata": map[string]interface{}{
+						"namespace": testNS,
+						"name":      routeName,
+					},
+					"status": map[string]interface{}{
+						"domainInternal": targetDNS,
+					},
+				},
+			},
+		},
 	}, {
 		Name: "new subscription: adds status, all targets resolved, subscribers modified -- empty but non-nil subscriber",
 		InitialState: []runtime.Object{