add decoration watch

Author: ColdsteelRail

xset/api/xset_controller_types.go

@@ -102,7 +102,7 @@ type SubResourcePvcAdapter interface {
 // X target when creating, (3) manage decoration update when decoration changed.
 type DecorationAdapter interface {
 	// WatchDecoration allows controller to watch decoration change.
-	WatchDecoration(c *controller.Controller)
+	WatchDecoration(c *controller.Controller) error
 	// GetDecorationGroupVersionKind returns decoration gvk.
 	GetDecorationGroupVersionKind() metav1.GroupVersionKind
 	// GetDecorationPatcherFromTarget returns patcher for decoration from target.

xset/xset_controller.go

@@ -148,7 +148,10 @@ func SetUpWithManager(mgr ctrl.Manager, xsetController api.XSetController) error
 
 	// watch for decoration changed
 	if adapter, ok := xsetController.(api.DecorationAdapter); ok {
-		adapter.WatchDecoration(&c)
+		err = adapter.WatchDecoration(&c)
+		if err != nil {
+			return err
+		}
 	}
 
 	return nil