func (s *dirImageSource) GetSignatures(ctx context.Context, instanceDigest *digest.Digest) ([][]byte, error) {
	if instanceDigest != nil {
		return nil, errors.Errorf(`Manifests lists are not supported by "dir:"`)
	}
	signatures := [][]byte{}
	for i := 0; ; i++ {
		signature, err := ioutil.ReadFile(s.ref.signaturePath(i))
		if err != nil {
			if os.IsNotExist(err) {
				break
			}
			return nil, err
		}
		signatures = append(signatures, signature)
	}
	return signatures, nil
}
func (s *dirImageSource) GetSignatures(ctx context.Context, instanceDigest *digest.Digest) ([][]byte, error) {
	if instanceDigest != nil {
		return nil, errors.Errorf(`Manifests lists are not supported by "dir:"`)
	}
	signatures := [][]byte{}
	for i := 0; ; i++ {
		signature, err := ioutil.ReadFile(s.ref.signaturePath(i))
		if err != nil {
			if os.IsNotExist(err) {
				break
			}
			return nil, err
		}
		signatures = append(signatures, signature)
	}
	return signatures, nil
}
func ( s * dirImageSource ) GetSignatures ( ctx context . Context , instanceDigest * digest . Digest ) ( [ ] [ ] byte , error ) { if instanceDigest != nil { return nil , errors . Errorf ( `Manifests lists are not supported by "dir:"` ) } signatures := [ ] [ ] byte { } for i := 0 ; ; i ++ { signature , err := ioutil . ReadFile ( s . ref . signaturePath ( i ) ) if err != nil { if os . IsNotExist ( err ) { break } return nil , err } signatures = append ( signatures , signature ) } return signatures , nil }
// GetSignatures returns the image's signatures.  It may use a remote (= slow) service.
// If instanceDigest is not nil, it contains a digest of the specific manifest instance to retrieve signatures for
// (when the primary manifest is a manifest list); this never happens if the primary manifest is not a manifest list
// (e.g. if the source never returns manifest lists).
GetSignatures returns the image s signatures . It may use a remote ( = slow ) service . If instanceDigest is not nil it contains a digest of the specific manifest instance to retrieve signatures for ( when the primary manifest is a manifest list ) ; this never happens if the primary manifest is not a manifest list ( e . g . if the source never returns manifest lists ) .