Remove Sames

pkg/backend/httpstate/state.go

@@ -354,6 +354,8 @@ func convertEngineEvent(e engine.Event) (*apitype.UpdateEngineEvent, error) {
 		m := p.Metadata
 		if m.Old != nil && m.New != nil && m.Old.Outputs != nil && m.New.Outputs != nil {
 			changes = m.Old.Outputs.Diff(m.New.Outputs)
+			// Don't send data to the service we won't endup rendering.
+			changes.RemoveSames()
 		}
 
 		updateEvent.ResourceOpFinished = &apitype.ResourceOpFinishedEvent{

pkg/resource/properties_diff.go

@@ -74,6 +74,29 @@ func (diff *ObjectDiff) Keys() []PropertyKey {
 	return ks
 }
 
+// RemoveSames removes all references to "same" property values.
+func (diff *ObjectDiff) RemoveSames() {
+	removeSamesFromValueDiff := func(vd *ValueDiff) {
+		if arrayDiff := vd.Array; arrayDiff != nil {
+			arrayDiff.Sames = nil
+			for k, v := range arrayDiff.Updates {
+				removeSamesFromValueDiff(&v)
+			}
+		}
+		if objDiff := vd.Object; objDiff != nil {
+			objDiff.Sames = nil
+			for k, v := range objDiff.Updates {
+				removeSamesFromValueDiff(&v)
+			}
+		}
+	}
+
+	diff.Sames = nil
+	for k, v := range diff.Updates {
+		removeSamesFromValueDiff(&v)
+	}
+}
+
 // ValueDiff holds the results of diffing two property values.
 type ValueDiff struct {
 	Old    PropertyValue // the old value.