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