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// Copyright 2022 The Kubernetes 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 klog_test
import (
"flag"
"fmt"
"os"
"k8s.io/klog/v2"
)
func ExampleFlushAndExit() {
// Set up klog so that we can test it below.
var fs flag.FlagSet
klog.InitFlags(&fs)
state := klog.CaptureState()
defer state.Restore()
if err := fs.Set("skip_headers", "true"); err != nil {
panic(err)
}
if err := fs.Set("logtostderr", "false"); err != nil {
panic(err)
}
klog.SetOutput(os.Stdout)
klog.OsExit = func(exitCode int) {
fmt.Printf("os.Exit(%d)\n", exitCode)
}
// If we were to return or exit without flushing, this message would
// get lost because it is buffered in memory by klog when writing to
// files. Output to stderr is not buffered.
klog.InfoS("exiting...")
exitCode := 10
klog.FlushAndExit(klog.ExitFlushTimeout, exitCode)
// Output:
// "exiting..."
// os.Exit(10)
}
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