| // Copyright Istio 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 cmd |
| |
| import ( |
| "flag" |
| "os" |
| "os/signal" |
| "syscall" |
| ) |
| |
| import ( |
| "github.com/spf13/cobra" |
| "github.com/spf13/pflag" |
| "istio.io/pkg/log" |
| ) |
| |
| // WaitSignal awaits for SIGINT or SIGTERM and closes the channel |
| func WaitSignal(stop chan struct{}) { |
| sigs := make(chan os.Signal, 1) |
| signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM) |
| <-sigs |
| close(stop) |
| _ = log.Sync() |
| } |
| |
| // WaitSignalFunc awaits for SIGINT or SIGTERM and calls the cancel function |
| func WaitSignalFunc(cancel func()) { |
| sigs := make(chan os.Signal, 1) |
| signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM) |
| <-sigs |
| cancel() |
| _ = log.Sync() |
| } |
| |
| // AddFlags adds all command line flags to the given command. |
| func AddFlags(rootCmd *cobra.Command) { |
| rootCmd.PersistentFlags().AddGoFlagSet(flag.CommandLine) |
| } |
| |
| // PrintFlags logs the flags in the flagset |
| func PrintFlags(flags *pflag.FlagSet) { |
| flags.VisitAll(func(flag *pflag.Flag) { |
| log.Infof("FLAG: --%s=%q", flag.Name, flag.Value) |
| }) |
| } |