Function RunInteractiveCommandWithOutput

pkg/exec/exec.go:98–133

RunInteractiveCommandWithOutput writes to the host and also to the passed io.Writer

(command string, args []string, out io.Writer)

// RunInteractiveCommandWithOutput writes to the host and
// also to the passed io.Writer
func RunInteractiveCommandWithOutput(command string, args []string, out io.Writer) error {
	cmd := HostCommand(command, args...)
	cmd.Stdin = os.Stdin

	pr, pw := io.Pipe()
	defer func() {
		_ = pr.Close()
	}()
	cmd.Stdout = pw
	cmd.Stderr = pw

	err := cmd.Start()
	if err != nil {
		return err
	}

	go func() {
		_ = CleanAndCopy(out, pr)
		_ = pr.Close()
	}()

	sigs := make(chan os.Signal, 1)
	signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM, syscall.SIGQUIT)

	// Goroutine to handle signals so the script can do the right thing
	go func() {
		sig := <-sigs
		// Send the received signal to the child process
		if err := cmd.Process.Signal(sig); err != nil {
			panic(err)
		}
	}()

	err = cmd.Wait()
	return err
}

// RunHostCommand executes a command on the host and returns the
// combined stdout/stderr results and error