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  }