func GetImageDiffCache(s storage.Storage, imageID string) ([]byte, error) {
path := storage.ImageDiffPath(imageID)
if exists, _ := s.Exists(path); exists {
return s.Get(storage.ImageDiffPath(imageID))
}
// that indicates miss/successful hit/cache error...
// weird that we have no way of knowing that this is a cache miss outside of this function, but this is how
// docker-registry does it so we'll follow...
return nil, nil // nil error, because cache missed
}
func SetImageDiffCache(s storage.Storage, imageID string, diffJson []byte) error {
return s.Put(storage.ImageDiffPath(imageID), diffJson)
}