// If the image does not exist, it returns false and an optional error message, for debug purposes.
func Exists(image string) (bool, error) {
	ref, err := name.ParseReference(image)
	if err != nil {
		return false, fmt.Errorf("parsing reference %q: %w", image, err)
	}
	_, err = remote.Get(ref, remote.WithAuthFromKeychain(authn.DefaultKeychain))
	if err == nil {
		// image exists

			bases[keys[i]] = rbi
		}
		basesMu.Unlock()
	}()

	t0 := time.Now()
	for i, b := range keys {
		b, i := b, i
		go func() {
			defer wg.Done()
			ref, err := name.ParseReference(b.name)
			if err != nil {
				log.WithLabels("image", b).Warnf("base failed: %v", err)
				return
			}
			plat := v1.Platform{
				Architecture: b.arch,
				OS:           "linux",
			}

	convertedTag := tag
	if converted, found := h.tagMap[imageName+":"+tag]; found {
		convertedTag = converted
	}

	u := fmt.Sprintf("%v/%v:%v", *registry, imageName, convertedTag)
	ref, err := name.ParseReference(u)
	if err != nil {
		return "", fmt.Errorf("could not parse url in image reference: %v", err)
	}

	t := remote.DefaultTransport.(*http.Transport).Clone()