1 /* 2 Copyright 2022 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package klogflags 18 19 import ( 20 "flag" 21 22 "k8s.io/klog/v2" 23 ) 24 25 // Init is a replacement for klog.InitFlags which only adds those flags 26 // that are still supported for Kubernetes components (i.e. -v and -vmodule). 27 // See 28 // https://github.com/kubernetes/enhancements/tree/master/keps/sig-instrumentation/2845-deprecate-klog-specific-flags-in-k8s-components. 29 func Init(fs *flag.FlagSet) { 30 var allFlags flag.FlagSet 31 klog.InitFlags(&allFlags) 32 if fs == nil { 33 fs = flag.CommandLine 34 } 35 allFlags.VisitAll(func(f *flag.Flag) { 36 switch f.Name { 37 case "v", "vmodule": 38 fs.Var(f.Value, f.Name, f.Usage) 39 } 40 }) 41 } 42