func getImage(s *graph.TagStore, img, imgID string) (string, error) {
// both Image and ImageID is actually ids, nothing to guess
if strings.HasPrefix(imgID, img) {
return img, nil
}
id, err := s.GetID(img)
if err != nil {
if err == graph.ErrNameIsNotExist {
return imgID, nil
}
return "", err
}
if id != imgID {
return imgID, nil
}
return img, nil
}
