Function RunLoggingOutputOnFail

pkg/image/exec/exec.go:85–108

RunLoggingOutputOnFail runs the cmd, logging error output if Run returns an error

(cmd Cmd, retries int)

// RunLoggingOutputOnFail runs the cmd, logging error output if Run returns an error
func RunLoggingOutputOnFail(cmd Cmd, retries int) error {
	var buff bytes.Buffer
	cmd.SetStdout(&buff)
	cmd.SetStderr(&buff)
	err := cmd.Run()
	if err != nil {
		// retry pulling up to retries times if necessary
		for i := 0; i < retries; i++ {
			time.Sleep(time.Second * time.Duration(i+1))
			err = cmd.Run()
			if err == nil {
				return nil
			}
		}

		// All retries failed or none were requested
		log.Errorf("failed with following error after %d retries:", retries)
		scanner := bufio.NewScanner(&buff)
		for scanner.Scan() {
			log.Error(scanner.Text())
		}
	}
	return err
}