refactor adding enum for storage types

Signed-off-by: Mike Brown <brownwm@us.ibm.com>

manifest/manifestlist/manifestlist_test.go

@@ -111,6 +111,7 @@ func TestManifestList(t *testing.T) {
 	}
 }
 
+// TODO (mikebrow): add annotations on the index and individual manifests
 var expectedOCIImageIndexSerialization = []byte(`{
    "schemaVersion": 2,
    "mediaType": "application/vnd.oci.image.index.v1+json",

manifest/ocischema/builder_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/opencontainers/image-spec/specs-go/v1"
 )
 
+// TODO (not assigned): consider making mockBlobService common for ocischema, schema2, and schema1
 type mockBlobService struct {
 	descriptors map[digest.Digest]distribution.Descriptor
 }

manifest/ocischema/manifest.go

@@ -57,7 +57,6 @@ func (m Manifest) References() []distribution.Descriptor {
 	references := make([]distribution.Descriptor, 0, 1+len(m.Layers))
 	references = append(references, m.Config)
 	references = append(references, m.Layers...)
-	// TODO: (mikebrow/stevvooe) should we return annotations as references
 	return references
 }
 

manifest/ocischema/manifest_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/opencontainers/image-spec/specs-go/v1"
 )
 
+// TODO (mikebrow): add annotations to the test
 var expectedManifestSerialization = []byte(`{
    "schemaVersion": 2,
    "mediaType": "application/vnd.oci.image.manifest.v1+json",