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utils.go
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utils.go
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/*
Copyright 2018 The Kubernetes Authors.
Copyright 2022 Google LLC
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
https://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 utils
import (
"os"
"os/exec"
"k8s.io/klog/v2"
)
func EnsureVariable(v *string, set bool, msgOnError string) {
if set && len(*v) == 0 {
klog.Fatal(msgOnError)
} else if !set && len(*v) != 0 {
klog.Fatal(msgOnError)
}
}
func isVariableSet(v string) bool {
return len(v) != 0
}
func runCommand(action string, cmd *exec.Cmd) error {
cmd.Stdout = os.Stdout
cmd.Stdin = os.Stdin
cmd.Stderr = os.Stderr
klog.Infof("%s", action)
klog.Infof("cmd env=%v", cmd.Env)
klog.Infof("cmd path=%v", cmd.Path)
klog.Infof("cmd args=%s", cmd.Args)
if err := cmd.Start(); err != nil {
return err
}
return cmd.Wait()
}