go mod changes

vendor/github.com/docker/distribution/reference/normalize.go

@@ -56,35 +56,6 @@ func ParseNormalizedNamed(s string) (Named, error) {
 	return named, nil
 }
 
-// ParseDockerRef normalizes the image reference following the docker convention. This is added
-// mainly for backward compatibility.
-// The reference returned can only be either tagged or digested. For reference contains both tag
-// and digest, the function returns digested reference, e.g. docker.io/library/busybox:latest@
-// sha256:7cc4b5aefd1d0cadf8d97d4350462ba51c694ebca145b08d7d41b41acc8db5aa will be returned as
-// docker.io/library/busybox@sha256:7cc4b5aefd1d0cadf8d97d4350462ba51c694ebca145b08d7d41b41acc8db5aa.
-func ParseDockerRef(ref string) (Named, error) {
-	named, err := ParseNormalizedNamed(ref)
-	if err != nil {
-		return nil, err
-	}
-	if _, ok := named.(NamedTagged); ok {
-		if canonical, ok := named.(Canonical); ok {
-			// The reference is both tagged and digested, only
-			// return digested.
-			newNamed, err := WithName(canonical.Name())
-			if err != nil {
-				return nil, err
-			}
-			newCanonical, err := WithDigest(newNamed, canonical.Digest())
-			if err != nil {
-				return nil, err
-			}
-			return newCanonical, nil
-		}
-	}
-	return TagNameOnly(named), nil
-}
-
 // splitDockerDomain splits a repository name to domain and remotename string.
 // If no valid domain is found, the default domain is used. Repository name
 // needs to be already validated before.

vendor/github.com/docker/distribution/reference/reference.go

@@ -205,7 +205,7 @@ func Parse(s string) (Reference, error) {
 	var repo repository
 
 	nameMatch := anchoredNameRegexp.FindStringSubmatch(matches[1])
-	if len(nameMatch) == 3 {
+	if nameMatch != nil && len(nameMatch) == 3 {
 		repo.domain = nameMatch[1]
 		repo.path = nameMatch[2]
 	} else {