istio.io/istio@v0.0.0-20240520182934-d79c90f27776/operator/pkg/util/label.go (about) 1 // Copyright Istio Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package util 16 17 import ( 18 "k8s.io/apimachinery/pkg/api/meta" 19 "k8s.io/apimachinery/pkg/runtime" 20 ) 21 22 // SetLabel is a helper function which sets the specified label and value on the specified object. 23 func SetLabel(resource runtime.Object, label, value string) error { 24 resourceAccessor, err := meta.Accessor(resource) 25 if err != nil { 26 return err 27 } 28 labels := resourceAccessor.GetLabels() 29 if labels == nil { 30 labels = map[string]string{} 31 } 32 labels[label] = value 33 resourceAccessor.SetLabels(labels) 34 return nil 35 }