Function showPromptForDownloadSecond

src/cmd/create.go:835–945

(imageFull string, errFirst *promptForDownloadError)

}

func showPromptForDownloadSecond(imageFull string, errFirst *promptForDownloadError) bool {
	oldState, err := term.GetState(os.Stdin)
	if err != nil {
		logrus.Debugf("Show prompt for download: failed to get terminal state: %s", err)
		return false
	}

	defer term.SetState(os.Stdin, oldState)

	lockedState := term.NewStateFrom(oldState,
		term.WithVMIN(1),
		term.WithVTIME(0),
		term.WithoutECHO(),
		term.WithoutICANON())

	if err := term.SetState(os.Stdin, lockedState); err != nil {
		logrus.Debugf("Show prompt for download: failed to set terminal state: %s", err)
		return false
	}

	parentCtx := context.Background()
	discardCtx, discardCancel := context.WithCancelCause(parentCtx)
	defer discardCancel(errors.New("clean-up"))

	discardCh, discardErrCh := discardInputAsync(discardCtx)

	var prompt string
	if errors.Is(errFirst, context.Canceled) {
		prompt = createPromptForDownload(imageFull, errFirst.ImageSize)
	} else {
		prompt = createPromptForDownload(imageFull, "")
	}

	fmt.Printf("\r")

	askCtx, askCancel := context.WithCancelCause(parentCtx)
	defer askCancel(errors.New("clean-up"))

	var askForConfirmationPreFnDone bool
	askForConfirmationPreFn := func() error {
		defer discardCancel(errors.New("clean-up"))
		if askForConfirmationPreFnDone {
			return nil
		}

		// Erase to end of line
		fmt.Printf("\033[K")

		// Save the cursor position.
		fmt.Printf("\033[s")

		if err := term.SetState(os.Stdin, oldState); err != nil {
			return fmt.Errorf("failed to restore terminal state: %w", err)
		}

		cause := errors.New("terminal restored")
		discardCancel(cause)