Method LayerInfosForCopy

pkg/blobcache/src.go:177–209

(ctx context.Context, instanceDigest *digest.Digest)

}

func (s *blobCacheSource) LayerInfosForCopy(ctx context.Context, instanceDigest *digest.Digest) ([]types.BlobInfo, error) {
	signatures, err := s.source.GetSignaturesWithFormat(ctx, instanceDigest)
	if err != nil {
		return nil, fmt.Errorf("error checking if image %q has signatures: %w", transports.ImageName(s.reference), err)
	}
	canReplaceBlobs := len(signatures) == 0

	infos, err := s.source.LayerInfosForCopy(ctx, instanceDigest)
	if err != nil {
		return nil, fmt.Errorf("error getting layer infos for copying image %q through cache: %w", transports.ImageName(s.reference), err)
	}
	if infos == nil {
		img, err := image.FromUnparsedImage(ctx, &s.sys, image.UnparsedInstance(s.source, instanceDigest))
		if err != nil {
			return nil, fmt.Errorf("error opening image to get layer infos for copying image %q through cache: %w", transports.ImageName(s.reference), err)
		}
		infos = img.LayerInfos()
	}

	if canReplaceBlobs && s.reference.compress != types.PreserveOriginal {
		replacedInfos := make([]types.BlobInfo, 0, len(infos))
		for _, info := range infos {
			info, err = s.layerInfoForCopy(info)
			if err != nil {
				return nil, err
			}
			replacedInfos = append(replacedInfos, info)
		}
		infos = replacedInfos
	}

	return infos, nil
}

// SupportsGetBlobAt() returns true if GetBlobAt (BlobChunkAccessor) is supported.
func (s *blobCacheSource) SupportsGetBlobAt() bool {