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//go:build !containers_image_storage_stub
// +build !containers_image_storage_stub
package storage
import (
"context"
"github.com/containers/image/v5/internal/image"
"github.com/containers/image/v5/types"
"github.com/containers/storage"
digest "github.com/opencontainers/go-digest"
)
var (
// ErrNoSuchImage is returned when we attempt to access an image which
// doesn't exist in the storage area.
ErrNoSuchImage = storage.ErrNotAnImage
)
type storageImageCloser struct {
types.ImageCloser
size int64
}
// manifestBigDataKey returns a key suitable for recording a manifest with the specified digest using storage.Store.ImageBigData and related functions.
// If a specific manifest digest is explicitly requested by the user, the key returned by this function should be used preferably;
// for compatibility, if a manifest is not available under this key, check also storage.ImageDigestBigDataKey
func manifestBigDataKey(digest digest.Digest) string {
return storage.ImageDigestManifestBigDataNamePrefix + "-" + digest.String()
}
// signatureBigDataKey returns a key suitable for recording the signatures associated with the manifest with the specified digest using storage.Store.ImageBigData and related functions.
// If a specific manifest digest is explicitly requested by the user, the key returned by this function should be used preferably;
func signatureBigDataKey(digest digest.Digest) string {
return "signature-" + digest.Encoded()
}
// Size() returns the previously-computed size of the image, with no error.
func (s *storageImageCloser) Size() (int64, error) {
return s.size, nil
}
// newImage creates an image that also knows its size
func newImage(ctx context.Context, sys *types.SystemContext, s storageReference) (types.ImageCloser, error) {
src, err := newImageSource(sys, s)
if err != nil {
return nil, err
}
img, err := image.FromSource(ctx, sys, src)
if err != nil {
return nil, err
}
size, err := src.getSize()
if err != nil {
return nil, err
}
return &storageImageCloser{ImageCloser: img, size: size}, nil
}
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