Make fieldPath part of getting a reference rather than part of making an event.

pkg/api/ref.go

@@ -62,6 +62,16 @@ func GetReference(obj runtime.Object) (*ObjectReference, error) {
 	}, nil
 }
 
+// GetPartialReference is exactly like GetReference, but allows you to set the FieldPath.
+func GetPartialReference(obj runtime.Object, fieldPath string) (*ObjectReference, error) {
+	ref, err := GetReference(obj)
+	if err != nil {
+		return nil, err
+	}
+	ref.FieldPath = fieldPath
+	return ref, nil
+}
+
 // Allow clients to preemptively get a reference to an API object and pass it to places that
 // intend only to get a reference to that object. This simplifies the event recording interface.
 func (*ObjectReference) IsAnAPIObject() {}