Function showPromptForDownloadFirst

src/cmd/create.go:768–833

(imageFull string)

}

func showPromptForDownloadFirst(imageFull string) (bool, error) {
	prompt := createPromptForDownload(imageFull, " ... MB")

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

	askCh, askErrCh := askForConfirmationAsync(askCtx, prompt, nil)

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

	imageSizeCh, imageSizeErrCh := getImageSizeFromRegistryAsync(imageSizeCtx, imageFull)

	var imageSize string
	var shouldPullImage bool

	select {
	case val := <-askCh:
		shouldPullImage = val
		cause := fmt.Errorf("%w: received confirmation without image size", context.Canceled)
		imageSizeCancel(cause)
	case err := <-askErrCh:
		shouldPullImage = false
		cause := fmt.Errorf("failed to ask for confirmation without image size: %w", err)
		imageSizeCancel(cause)
	case val := <-imageSizeCh:
		imageSize = val
		cause := fmt.Errorf("%w: received image size", context.Canceled)
		askCancel(cause)
	case err := <-imageSizeErrCh:
		cause := fmt.Errorf("failed to get image size: %w", err)
		askCancel(cause)
	}

	if imageSizeCtx.Err() != nil && askCtx.Err() == nil {
		cause := context.Cause(imageSizeCtx)
		logrus.Debugf("Show prompt for download: image size canceled: %s", cause)
		return shouldPullImage, nil
	}

	var done bool

	if imageSizeCtx.Err() == nil && askCtx.Err() != nil {
		select {
		case val := <-askCh:
			logrus.Debugf("Show prompt for download: received pending confirmation without image size")
			shouldPullImage = val
			done = true
		case err := <-askErrCh:
			logrus.Debugf("Show prompt for download: failed to ask for confirmation without image size: %s",
				err)
		}
	} else {
		panic("code should not be reached")
	}

	cause := context.Cause(askCtx)