support customize notification receiver

Signed-off-by: wanjunlei <wanjunlei@yunify.com>

vendor/sigs.k8s.io/controller-runtime/pkg/internal/objectutil/filter.go

@@ -0,0 +1,42 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package objectutil
+
+import (
+	apimeta "k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+// FilterWithLabels returns a copy of the items in objs matching labelSel
+func FilterWithLabels(objs []runtime.Object, labelSel labels.Selector) ([]runtime.Object, error) {
+	outItems := make([]runtime.Object, 0, len(objs))
+	for _, obj := range objs {
+		meta, err := apimeta.Accessor(obj)
+		if err != nil {
+			return nil, err
+		}
+		if labelSel != nil {
+			lbls := labels.Set(meta.GetLabels())
+			if !labelSel.Matches(lbls) {
+				continue
+			}
+		}
+		outItems = append(outItems, obj.DeepCopyObject())
+	}
+	return outItems, nil
+}