fix: issue with helm template and oci chart

Signed-off-by: Terry Howe <terrylhowe@gmail.com>

pkg/registry/client.go

@@ -357,7 +357,7 @@ func (c *Client) Pull(ref string, options ...PullOption) (*PullResult, error) {
 	}
 	registryStore := content.Registry{Resolver: remotesResolver}
 
-	manifest, err := oras.Copy(ctx(c.out, c.debug), registryStore, parsedRef.OrasReference.String(), memoryStore, "",
+	manifest, err := oras.Copy(ctx(c.out, c.debug), registryStore, parsedRef.String(), memoryStore, "",
 		oras.WithPullEmptyNameAllowed(),
 		oras.WithAllowedMediaTypes(allowedMediaTypes),
 		oras.WithLayerDescriptors(func(l []ocispec.Descriptor) {
@@ -419,7 +419,7 @@ func (c *Client) Pull(ref string, options ...PullOption) (*PullResult, error) {
 		},
 		Chart: &DescriptorPullSummaryWithMeta{},
 		Prov:  &DescriptorPullSummary{},
-		Ref:   parsedRef.OrasReference.String(),
+		Ref:   parsedRef.String(),
 	}
 	var getManifestErr error
 	if _, manifestData, ok := memoryStore.Get(manifest); !ok {
@@ -590,7 +590,7 @@ func (c *Client) Push(data []byte, ref string, options ...PushOption) (*PushResu
 		return nil, err
 	}
 
-	if err := memoryStore.StoreManifest(parsedRef.OrasReference.String(), manifest, manifestData); err != nil {
+	if err := memoryStore.StoreManifest(parsedRef.String(), manifest, manifestData); err != nil {
 		return nil, err
 	}
 
@@ -620,7 +620,7 @@ func (c *Client) Push(data []byte, ref string, options ...PushOption) (*PushResu
 		},
 		Chart: chartSummary,
 		Prov:  &descriptorPushSummary{}, // prevent nil references
-		Ref:   parsedRef.OrasReference.String(),
+		Ref:   parsedRef.String(),
 	}
 	if operation.provData != nil {
 		result.Prov = &descriptorPushSummary{

pkg/registry/reference.go

@@ -69,3 +69,10 @@ func NewReference(raw string) (result Reference, err error) {
 	result.Tag = result.OrasReference.Reference
 	return result, nil
 }
+
+func (r *Reference) String() string {
+	if r.Tag == "" {
+		return r.OrasReference.String() + "@" + r.Digest
+	}
+	return r.OrasReference.String()
+}

pkg/registry/reference_test.go

@@ -40,6 +40,18 @@ func verify(t *testing.T, actual Reference, registry, repository, tag, digest st
 	if digest != actual.Digest {
 		t.Errorf("Digest expected %v actual %v", digest, actual.Digest)
 	}
+	expectedString := registry
+	if repository != "" {
+		expectedString = expectedString + "/" + repository
+	}
+	if tag != "" {
+		expectedString = expectedString + ":" + tag
+	} else {
+		expectedString = expectedString + "@" + digest
+	}
+	if actual.String() != expectedString {
+		t.Errorf("String expected %s actual %s", expectedString, actual.String())
+	}
 }
 
 func TestNewReference(t *testing.T) {