deprecate Versioned in favor of oci.Versioned

Update the Manifest types to use the oci implementation of the Versioned
struct.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

internal/client/repository_test.go

@@ -18,13 +18,13 @@ import (
 
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/internal/dcontext"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/ocischema"
 	"github.com/distribution/distribution/v3/registry/api/errcode"
 	"github.com/distribution/distribution/v3/testutil"
 	"github.com/distribution/reference"
 	"github.com/google/uuid"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -928,10 +928,8 @@ func newRandomOCIManifest(t *testing.T, blobCount int) (*ocischema.Manifest, dig
 	}
 
 	m := ocischema.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: v1.MediaTypeImageManifest,
-		},
 		Config: distribution.Descriptor{
 			Digest:    "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",
 			Size:      123,

manifest/manifestlist/manifestlist.go

@@ -8,6 +8,7 @@ import (
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/manifest"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -18,6 +19,11 @@ const (
 
 // SchemaVersion provides a pre-initialized version structure for this
 // packages version of the manifest.
+//
+// Deprecated: use [specs.Versioned] and set MediaType on the manifest
+// to [MediaTypeManifestList].
+//
+//nolint:staticcheck // ignore SA1019: manifest.Versioned is deprecated:
 var SchemaVersion = manifest.Versioned{
 	SchemaVersion: 2,
 	MediaType:     MediaTypeManifestList,
@@ -84,7 +90,10 @@ type ManifestDescriptor struct {
 
 // ManifestList references manifests for various platforms.
 type ManifestList struct {
-	manifest.Versioned
+	specs.Versioned
+
+	// MediaType is the media type of this schema.
+	MediaType string `json:"mediaType,omitempty"`
 
 	// Manifests references a list of manifests
 	Manifests []ManifestDescriptor `json:"manifests"`
@@ -127,10 +136,8 @@ func FromDescriptors(descriptors []ManifestDescriptor) (*DeserializedManifestLis
 // fromDescriptorsWithMediaType is for testing purposes, it's useful to be able to specify the media type explicitly
 func fromDescriptorsWithMediaType(descriptors []ManifestDescriptor, mediaType string) (*DeserializedManifestList, error) {
 	m := ManifestList{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: SchemaVersion.SchemaVersion,
 		MediaType: mediaType,
-		},
 	}
 
 	m.Manifests = make([]ManifestDescriptor, len(descriptors))
@@ -175,7 +182,14 @@ func (m *DeserializedManifestList) MarshalJSON() ([]byte, error) {
 // Payload returns the raw content of the manifest list. The contents can be
 // used to calculate the content identifier.
 func (m DeserializedManifestList) Payload() (string, []byte, error) {
-	return m.MediaType, m.canonical, nil
+	var mediaType string
+	if m.MediaType == "" {
+		mediaType = v1.MediaTypeImageIndex
+	} else {
+		mediaType = m.MediaType
+	}
+
+	return mediaType, m.canonical, nil
 }
 
 // validateManifestList returns an error if the byte slice is invalid JSON or if it

manifest/ocischema/builder.go

@@ -5,8 +5,8 @@ import (
 	"errors"
 
 	"github.com/distribution/distribution/v3"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -58,10 +58,8 @@ func (mb *Builder) SetMediaType(mediaType string) error {
 // Build produces a final manifest from the given references.
 func (mb *Builder) Build(ctx context.Context) (distribution.Manifest, error) {
 	m := Manifest{
-		Versioned: manifest.Versioned{
+		Versioned:   specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType:   mb.mediaType,
-		},
 		Layers:      make([]distribution.Descriptor, len(mb.layers)),
 		Annotations: mb.annotations,
 	}

manifest/ocischema/index.go

@@ -8,11 +8,17 @@ import (
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/manifest"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 // IndexSchemaVersion provides a pre-initialized version structure for OCI Image
 // Indices.
+//
+// Deprecated: use [specs.Versioned] and set MediaType on the manifest
+// to [v1.MediaTypeImageIndex].
+//
+//nolint:staticcheck // ignore SA1019: manifest.Versioned is deprecated:
 var IndexSchemaVersion = manifest.Versioned{
 	SchemaVersion: 2,
 	MediaType:     v1.MediaTypeImageIndex,
@@ -48,7 +54,10 @@ func unmarshalImageIndex(b []byte) (distribution.Manifest, distribution.Descript
 
 // ImageIndex references manifests for various platforms.
 type ImageIndex struct {
-	manifest.Versioned
+	specs.Versioned
+
+	// MediaType is the media type of this schema.
+	MediaType string `json:"mediaType,omitempty"`
 
 	// Manifests references a list of manifests
 	Manifests []distribution.Descriptor `json:"manifests"`
@@ -84,10 +93,8 @@ func FromDescriptors(descriptors []distribution.Descriptor, annotations map[stri
 // fromDescriptorsWithMediaType is for testing purposes, it's useful to be able to specify the media type explicitly
 func fromDescriptorsWithMediaType(descriptors []distribution.Descriptor, annotations map[string]string, mediaType string) (_ *DeserializedImageIndex, err error) {
 	m := ImageIndex{
-		Versioned: manifest.Versioned{
+		Versioned:   specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: IndexSchemaVersion.SchemaVersion,
 		MediaType:   mediaType,
-		},
 		Annotations: annotations,
 	}
 

manifest/ocischema/manifest.go

@@ -8,11 +8,17 @@ import (
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/manifest"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
 // SchemaVersion provides a pre-initialized version structure for OCI Image
-// Manifests
+// Manifests.
+//
+// Deprecated: use [specs.Versioned] and set MediaType on the manifest
+// to [v1.MediaTypeImageManifest].
+//
+//nolint:staticcheck // ignore SA1019: manifest.Versioned is deprecated:
 var SchemaVersion = manifest.Versioned{
 	SchemaVersion: 2,
 	MediaType:     v1.MediaTypeImageManifest,
@@ -44,7 +50,10 @@ func unmarshalOCISchema(b []byte) (distribution.Manifest, distribution.Descripto
 
 // Manifest defines a ocischema manifest.
 type Manifest struct {
-	manifest.Versioned
+	specs.Versioned
+
+	// MediaType is the media type of this schema.
+	MediaType string `json:"mediaType,omitempty"`
 
 	// Config references the image configuration as a blob.
 	Config distribution.Descriptor `json:"config"`
@@ -124,7 +133,7 @@ func (m *DeserializedManifest) MarshalJSON() ([]byte, error) {
 
 // Payload returns the raw content of the manifest. The contents can be used to
 // calculate the content identifier.
-func (m DeserializedManifest) Payload() (string, []byte, error) {
+func (m *DeserializedManifest) Payload() (string, []byte, error) {
 	return v1.MediaTypeImageManifest, m.canonical, nil
 }
 

manifest/ocischema/manifest_test.go

@@ -7,8 +7,8 @@ import (
 	"testing"
 
 	"github.com/distribution/distribution/v3"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/manifestlist"
+	"github.com/opencontainers/image-spec/specs-go"
 
 	"github.com/opencontainers/go-digest"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
@@ -42,10 +42,8 @@ const expectedManifestSerialization = `{
 
 func makeTestManifest(mediaType string) Manifest {
 	return Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: mediaType,
-		},
 		Config: distribution.Descriptor{
 			MediaType:   v1.MediaTypeImageConfig,
 			Digest:      "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",

manifest/schema2/builder.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/distribution/distribution/v3"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 // Builder is a type for constructing manifests.
@@ -35,7 +36,8 @@ func NewManifestBuilder(configDescriptor distribution.Descriptor, configJSON []b
 // Build produces a final manifest from the given references.
 func (mb *Builder) Build(ctx context.Context) (distribution.Manifest, error) {
 	m := Manifest{
-		Versioned: SchemaVersion,
+		Versioned: specs.Versioned{SchemaVersion: defaultSchemaVersion},
+		MediaType: defaultMediaType,
 		Layers:    make([]distribution.Descriptor, len(mb.dependencies)),
 	}
 	copy(m.Layers, mb.dependencies)

manifest/schema2/manifest.go

@@ -8,6 +8,7 @@ import (
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/manifest"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 const (
@@ -33,15 +34,25 @@ const (
 	MediaTypeUncompressedLayer = "application/vnd.docker.image.rootfs.diff.tar"
 )
 
+const (
+	defaultSchemaVersion = 2
+	defaultMediaType     = MediaTypeManifest
+)
+
 // SchemaVersion provides a pre-initialized version structure for this
 // packages version of the manifest.
+//
+// Deprecated: use [specs.Versioned] and set MediaType on the manifest
+// to [MediaTypeManifest].
+//
+//nolint:staticcheck // ignore SA1019: manifest.Versioned is deprecated:
 var SchemaVersion = manifest.Versioned{
-	SchemaVersion: 2,
+	SchemaVersion: defaultSchemaVersion,
-	MediaType:     MediaTypeManifest,
+	MediaType:     defaultMediaType,
 }
 
 func init() {
-	if err := distribution.RegisterManifestSchema(MediaTypeManifest, unmarshalSchema2); err != nil {
+	if err := distribution.RegisterManifestSchema(defaultMediaType, unmarshalSchema2); err != nil {
 		panic(fmt.Sprintf("Unable to register manifest: %s", err))
 	}
 }
@@ -55,13 +66,16 @@ func unmarshalSchema2(b []byte) (distribution.Manifest, distribution.Descriptor,
 	return m, distribution.Descriptor{
 		Digest:    digest.FromBytes(b),
 		Size:      int64(len(b)),
-		MediaType: MediaTypeManifest,
+		MediaType: defaultMediaType,
 	}, nil
 }
 
 // Manifest defines a schema2 manifest.
 type Manifest struct {
-	manifest.Versioned
+	specs.Versioned
+
+	// MediaType is the media type of this schema.
+	MediaType string `json:"mediaType,omitempty"`
 
 	// Config references the image configuration as a blob.
 	Config distribution.Descriptor `json:"config"`
@@ -116,9 +130,8 @@ func (m *DeserializedManifest) UnmarshalJSON(b []byte) error {
 		return err
 	}
 
-	if mfst.MediaType != MediaTypeManifest {
+	if mfst.MediaType != defaultMediaType {
-		return fmt.Errorf("mediaType in manifest should be '%s' not '%s'",
+		return fmt.Errorf("mediaType in manifest should be '%s' not '%s'", defaultMediaType, mfst.MediaType)
-			MediaTypeManifest, mfst.MediaType)
 	}
 
 	m.Manifest = mfst

manifest/schema2/manifest_test.go

@@ -7,7 +7,7 @@ import (
 	"testing"
 
 	"github.com/distribution/distribution/v3"
-	"github.com/distribution/distribution/v3/manifest"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 const expectedManifestSerialization = `{
@@ -29,10 +29,8 @@ const expectedManifestSerialization = `{
 
 func makeTestManifest(mediaType string) Manifest {
 	return Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: mediaType,
-		},
 		Config: distribution.Descriptor{
 			MediaType: MediaTypeImageConfig,
 			Digest:    "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",

manifest/versioned.go

@@ -3,6 +3,8 @@ package manifest
 // Versioned provides a struct with the manifest schemaVersion and mediaType.
 // Incoming content with unknown schema version can be decoded against this
 // struct to check the version.
+//
+// Deprecated: use [specs.Versioned] and set MediaType on the Manifest itself.
 type Versioned struct {
 	// SchemaVersion is the image manifest schema that this image follows
 	SchemaVersion int `json:"schemaVersion"`

notifications/bridge_test.go

@@ -4,13 +4,13 @@ import (
 	"testing"
 
 	"github.com/distribution/distribution/v3"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/schema2"
 	v2 "github.com/distribution/distribution/v3/registry/api/v2"
 	"github.com/distribution/reference"
 	events "github.com/docker/go-events"
 	"github.com/google/uuid"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -29,7 +29,6 @@ var (
 	}
 	request      = RequestRecord{}
 	tag          = "latest"
-	ociMediaType = v1.MediaTypeImageManifest
 	artifactType = "application/vnd.example.sbom.v1"
 	cfg          = distribution.Descriptor{
 		MediaType: artifactType,
@@ -143,14 +142,13 @@ func TestEventBridgeRepoDeleted(t *testing.T) {
 }
 
 func createTestEnv(t *testing.T, fn testSinkFn) Listener {
-	manifest := schema2.Manifest{
+	mfst := schema2.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			MediaType: ociMediaType,
+		MediaType: v1.MediaTypeImageManifest,
-		},
 		Config:    cfg,
 	}
 
-	deserializedManifest, err := schema2.FromStruct(manifest)
+	deserializedManifest, err := schema2.FromStruct(mfst)
 	if err != nil {
 		t.Fatalf("creating OCI manifest: %v", err)
 	}

notifications/listener_test.go

@@ -14,6 +14,7 @@ import (
 	"github.com/distribution/distribution/v3/testutil"
 	"github.com/distribution/reference"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 func TestListener(t *testing.T) {
@@ -143,7 +144,8 @@ func checkTestRepository(t *testing.T, repository distribution.Repository, remov
 	}
 
 	m := schema2.Manifest{
-		Versioned: schema2.SchemaVersion,
+		Versioned: specs.Versioned{SchemaVersion: 2},
+		MediaType: schema2.MediaTypeManifest,
 		Config: distribution.Descriptor{
 			MediaType: "foo/bar",
 			Digest:    configDgst,

registry/handlers/api_test.go

@@ -21,7 +21,6 @@ import (
 
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/configuration"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/manifestlist"
 	"github.com/distribution/distribution/v3/manifest/schema2"
 	"github.com/distribution/distribution/v3/registry/api/errcode"
@@ -33,6 +32,7 @@ import (
 	"github.com/distribution/reference"
 	"github.com/gorilla/handlers"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 var headerConfig = http.Header{
@@ -1577,10 +1577,8 @@ func testManifestAPISchema2(t *testing.T, env *testEnv, imageName reference.Name
 	// --------------------------------
 	// Attempt to push manifest with missing config and missing layers
 	manifest := &schema2.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: schema2.MediaTypeManifest,
-		},
 		Config: distribution.Descriptor{
 			Digest:    "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",
 			Size:      3253,
@@ -1900,10 +1898,8 @@ func testManifestAPIManifestList(t *testing.T, env *testEnv, args manifestArgs)
 	// --------------------------------
 	// Attempt to push manifest list that refers to an unknown manifest
 	manifestList := &manifestlist.ManifestList{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: manifestlist.MediaTypeManifestList,
-		},
 		Manifests: []manifestlist.ManifestDescriptor{
 			{
 				Descriptor: distribution.Descriptor{
@@ -2639,10 +2635,8 @@ func createRepository(env *testEnv, t *testing.T, imageName string, tag string)
 	}
 
 	manifest := &schema2.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: schema2.MediaTypeManifest,
-		},
 		Config: distribution.Descriptor{
 			Digest:    "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",
 			Size:      3253,
@@ -2736,10 +2730,8 @@ func TestRegistryAsCacheMutationAPIs(t *testing.T) {
 
 	// Manifest upload
 	manifest := &schema2.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: schema2.MediaTypeManifest,
-		},
 		Config: distribution.Descriptor{
 			Digest:    "sha256:1a9ec845ee94c202b2d5da74a24f0ed2058318bfa9879fa541efaecba272e86b",
 			Size:      3253,

registry/proxy/proxymanifeststore_test.go

@@ -17,6 +17,7 @@ import (
 	"github.com/distribution/distribution/v3/testutil"
 	"github.com/distribution/reference"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 type statsManifest struct {
@@ -153,7 +154,8 @@ func populateRepo(ctx context.Context, t *testing.T, repository distribution.Rep
 	}
 
 	m := schema2.Manifest{
-		Versioned: schema2.SchemaVersion,
+		Versioned: specs.Versioned{SchemaVersion: 2},
+		MediaType: schema2.MediaTypeManifest,
 		Config: distribution.Descriptor{
 			MediaType: "foo/bar",
 			Digest:    configDigest,

registry/storage/manifestlisthandler.go

@@ -35,17 +35,17 @@ func (ms *manifestListHandler) Unmarshal(ctx context.Context, dgst digest.Digest
 func (ms *manifestListHandler) Put(ctx context.Context, manifestList distribution.Manifest, skipDependencyVerification bool) (digest.Digest, error) {
 	dcontext.GetLogger(ms.ctx).Debug("(*manifestListHandler).Put")
 
-	var schemaVersion, expectedSchemaVersion int
+	var schemaVersion int
 	switch m := manifestList.(type) {
 	case *manifestlist.DeserializedManifestList:
-		expectedSchemaVersion = manifestlist.SchemaVersion.SchemaVersion
 		schemaVersion = m.SchemaVersion
 	case *ocischema.DeserializedImageIndex:
-		expectedSchemaVersion = ocischema.IndexSchemaVersion.SchemaVersion
 		schemaVersion = m.SchemaVersion
 	default:
 		return "", fmt.Errorf("wrong type put to manifestListHandler: %T", manifestList)
 	}
+
+	const expectedSchemaVersion = 2
 	if schemaVersion != expectedSchemaVersion {
 		return "", fmt.Errorf("unrecognized manifest list schema version %d, expected %d", schemaVersion, expectedSchemaVersion)
 	}

registry/storage/manifeststore.go

@@ -7,11 +7,11 @@ import (
 
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/internal/dcontext"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/manifestlist"
 	"github.com/distribution/distribution/v3/manifest/ocischema"
 	"github.com/distribution/distribution/v3/manifest/schema2"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -88,7 +88,13 @@ func (ms *manifestStore) Get(ctx context.Context, dgst digest.Digest, options ..
 		return nil, err
 	}
 
-	var versioned manifest.Versioned
+	// versioned is a minimal representation of a manifest with version and mediatype.
+	var versioned struct {
+		specs.Versioned
+
+		// MediaType is the media type of this schema.
+		MediaType string `json:"mediaType,omitempty"`
+	}
 	if err = json.Unmarshal(content, &versioned); err != nil {
 		return nil, err
 	}

registry/storage/manifeststore_test.go

@@ -9,7 +9,6 @@ import (
 	"testing"
 
 	"github.com/distribution/distribution/v3"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/manifestlist"
 	"github.com/distribution/distribution/v3/manifest/ocischema"
 	"github.com/distribution/distribution/v3/manifest/schema2"
@@ -19,6 +18,7 @@ import (
 	"github.com/distribution/distribution/v3/testutil"
 	"github.com/distribution/reference"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -94,10 +94,8 @@ func testManifestStorage(t *testing.T, options ...RegistryOption) {
 	builder := schema2.NewManifestBuilder(d, sampleConfig)
 
 	m := &schema2.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: schema2.MediaTypeManifest,
-		},
 		Config: distribution.Descriptor{
 			Digest:    digest.FromBytes(sampleConfig),
 			Size:      int64(len(sampleConfig)),
@@ -393,7 +391,7 @@ func testOCIManifestStorage(t *testing.T, testname string, includeMediaTypes boo
 		t.Fatalf("%s: unexpected MediaType for result, %s", testname, fetchedManifest.MediaType)
 	}
 
-	if fetchedManifest.SchemaVersion != ocischema.SchemaVersion.SchemaVersion {
+	if fetchedManifest.SchemaVersion != 2 {
 		t.Fatalf("%s: unexpected schema version for result, %d", testname, fetchedManifest.SchemaVersion)
 	}
 

registry/storage/ocimanifesthandler_test.go

@@ -7,10 +7,10 @@ import (
 	"testing"
 
 	"github.com/distribution/distribution/v3"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/ocischema"
 	"github.com/distribution/distribution/v3/registry/storage/driver/inmemory"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -49,10 +49,8 @@ func TestVerifyOCIManifestNonDistributableLayer(t *testing.T) {
 	}
 
 	template := ocischema.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: v1.MediaTypeImageManifest,
-		},
 		Config:    config,
 	}
 
@@ -189,10 +187,8 @@ func TestVerifyOCIManifestBlobLayerAndConfig(t *testing.T) {
 	}
 
 	template := ocischema.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: v1.MediaTypeImageManifest,
-		},
 	}
 
 	checkFn := func(m ocischema.Manifest, rerr error) {

registry/storage/schema2manifesthandler_test.go

@@ -7,10 +7,10 @@ import (
 
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/internal/dcontext"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/schema2"
 	"github.com/distribution/distribution/v3/registry/storage/driver/inmemory"
 	"github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 func TestVerifyManifestForeignLayer(t *testing.T) {
@@ -45,10 +45,8 @@ func TestVerifyManifestForeignLayer(t *testing.T) {
 	}
 
 	template := schema2.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: schema2.MediaTypeManifest,
-		},
 		Config:    config,
 	}
 
@@ -176,10 +174,8 @@ func TestVerifyManifestBlobLayerAndConfig(t *testing.T) {
 	}
 
 	template := schema2.Manifest{
-		Versioned: manifest.Versioned{
+		Versioned: specs.Versioned{SchemaVersion: 2},
-			SchemaVersion: 2,
 		MediaType: schema2.MediaTypeManifest,
-		},
 	}
 
 	checkFn := func(m schema2.Manifest, rerr error) {

registry/storage/tagstore_test.go

@@ -6,11 +6,11 @@ import (
 	"testing"
 
 	"github.com/distribution/distribution/v3"
-	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/schema2"
 	"github.com/distribution/distribution/v3/registry/storage/driver/inmemory"
 	"github.com/distribution/reference"
 	digest "github.com/opencontainers/go-digest"
+	"github.com/opencontainers/image-spec/specs-go"
 )
 
 type tagsTestEnv struct {
@@ -243,10 +243,8 @@ func TestTagIndexes(t *testing.T) {
 			t.Fatal(err)
 		}
 		m := schema2.Manifest{
-			Versioned: manifest.Versioned{
+			Versioned: specs.Versioned{SchemaVersion: 2},
-				SchemaVersion: 2,
 			MediaType: schema2.MediaTypeManifest,
-			},
 			Config: distribution.Descriptor{
 				Digest:    conf.Digest,
 				Size:      1,