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package blobcache
import (
imageBlobCache "github.com/containers/image/v5/pkg/blobcache"
"github.com/containers/image/v5/types"
)
// BlobCache is an object which saves copies of blobs that are written to it while passing them
// through to some real destination, and which can be queried directly in order to read them
// back.
type BlobCache interface {
types.ImageReference
// HasBlob checks if a blob that matches the passed-in digest (and
// size, if not -1), is present in the cache.
HasBlob(types.BlobInfo) (bool, int64, error)
// Directories returns the list of cache directories.
Directory() string
// ClearCache() clears the contents of the cache directories. Note
// that this also clears content which was not placed there by this
// cache implementation.
ClearCache() error
}
// NewBlobCache creates a new blob cache that wraps an image reference. Any blobs which are
// written to the destination image created from the resulting reference will also be stored
// as-is to the specified directory or a temporary directory.
// The compress argument controls whether or not the cache will try to substitute a compressed
// or different version of a blob when preparing the list of layers when reading an image.
func NewBlobCache(ref types.ImageReference, directory string, compress types.LayerCompression) (BlobCache, error) {
return imageBlobCache.NewBlobCache(ref, directory, compress)
}
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