blob: edcd1d40304e56f240ed0360e5396dddd1ebaa78 [file] [log] [blame]
// 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)
})
}