build: bump github.com/opencontainers/image-spec to v1.1.0-rc5 (#615)

1. Bump `github.com/opencontainers/image-spec` to `v1.1.0-rc5` in go mod
2. Replace "index.json" and "blobs" with corresponding constants in the
spec
3. Fix testable examples that broke by the spec change - `MediaType`
became a required field in `Descriptor`

Resolve: #599
Signed-off-by: Lixia (Sylvia) Lei <lixlei@microsoft.com>

Author: Wwwsylvia

content/oci/oci.go

@@ -38,16 +38,6 @@ import (
 	"oras.land/oras-go/v2/internal/resolver"
 )
 
-// ociImageIndexFile is the file name of the index
-// from the OCI Image Layout Specification.
-// Reference: https://github.com/opencontainers/image-spec/blob/v1.1.0-rc4/image-layout.md#indexjson-file
-const ociImageIndexFile = "index.json"
-
-// ociBlobsDir is the name of the blobs directory
-// from the OCI Image Layout Specification.
-// Reference: https://github.com/opencontainers/image-spec/blob/v1.1.0-rc4/image-layout.md#content
-const ociBlobsDir = "blobs"
-
 // Store implements `oras.Target`, and represents a content store
 // based on file system with the OCI-Image layout.
 // Reference: https://github.com/opencontainers/image-spec/blob/v1.1.0-rc4/image-layout.md
@@ -89,13 +79,13 @@ func NewWithContext(ctx context.Context, root string) (*Store, error) {
 	store := &Store{
 		AutoSaveIndex: true,
 		root:          rootAbs,
-		indexPath:     filepath.Join(rootAbs, ociImageIndexFile),
+		indexPath:     filepath.Join(rootAbs, ocispec.ImageIndexFile),
 		storage:       storage,
 		tagResolver:   resolver.NewMemory(),
 		graph:         graph.NewMemory(),
 	}
 
-	if err := ensureDir(filepath.Join(rootAbs, ociBlobsDir)); err != nil {
+	if err := ensureDir(filepath.Join(rootAbs, ocispec.ImageBlobsDir)); err != nil {
 		return nil, err
 	}
 	if err := store.ensureOCILayoutFile(); err != nil {

content/oci/oci_test.go

@@ -109,7 +109,7 @@ func TestStore_Success(t *testing.T) {
 	}
 
 	// validate index.json
-	indexFilePath := filepath.Join(tempDir, ociImageIndexFile)
+	indexFilePath := filepath.Join(tempDir, "index.json")
 	indexFile, err := os.Open(indexFilePath)
 	if err != nil {
 		t.Errorf("error opening layout file, error = %v", err)
@@ -361,7 +361,7 @@ func TestStore_NotExistingRoot(t *testing.T) {
 	}
 
 	// validate index.json
-	indexFilePath := filepath.Join(root, ociImageIndexFile)
+	indexFilePath := filepath.Join(root, "index.json")
 	indexFile, err := os.Open(indexFilePath)
 	if err != nil {
 		t.Errorf("error opening layout file, error = %v", err)
@@ -930,7 +930,7 @@ func TestStore_TagByDigest(t *testing.T) {
 func TestStore_BadIndex(t *testing.T) {
 	tempDir := t.TempDir()
 	content := []byte("whatever")
-	path := filepath.Join(tempDir, ociImageIndexFile)
+	path := filepath.Join(tempDir, "index.json")
 	os.WriteFile(path, content, 0666)
 
 	_, err := New(tempDir)

content/oci/readonlyoci.go

@@ -154,7 +154,7 @@ func validateOCILayout(layout *ocispec.ImageLayout) error {
 
 // loadIndexFile reads index.json from s.fsys.
 func (s *ReadOnlyStore) loadIndexFile(ctx context.Context) error {
-	indexFile, err := s.fsys.Open(ociImageIndexFile)
+	indexFile, err := s.fsys.Open(ocispec.ImageIndexFile)
 	if err != nil {
 		return fmt.Errorf("failed to open index file: %w", err)
 	}

content/oci/readonlyoci_test.go

@@ -123,11 +123,11 @@ func TestReadOnlyStore(t *testing.T) {
 	// build fs
 	fsys := fstest.MapFS{}
 	for i, desc := range descs {
-		path := strings.Join([]string{ociBlobsDir, desc.Digest.Algorithm().String(), desc.Digest.Encoded()}, "/")
+		path := strings.Join([]string{"blobs", desc.Digest.Algorithm().String(), desc.Digest.Encoded()}, "/")
 		fsys[path] = &fstest.MapFile{Data: blobs[i]}
 	}
 	fsys[ocispec.ImageLayoutFile] = &fstest.MapFile{Data: layoutJSON}
-	fsys[ociImageIndexFile] = &fstest.MapFile{Data: indexJSON}
+	fsys["index.json"] = &fstest.MapFile{Data: indexJSON}
 
 	// test read-only store
 	ctx := context.Background()
@@ -507,7 +507,7 @@ func TestReadOnlyStore_TarFS(t *testing.T) {
 func TestReadOnlyStore_BadIndex(t *testing.T) {
 	content := []byte("whatever")
 	fsys := fstest.MapFS{
-		ociImageIndexFile: &fstest.MapFile{Data: content},
+		"index.json": &fstest.MapFile{Data: content},
 	}
 
 	ctx := context.Background()
@@ -603,11 +603,11 @@ func TestReadOnlyStore_Copy_OCIToMemory(t *testing.T) {
 	// build fs
 	fsys := fstest.MapFS{}
 	for i, desc := range descs {
-		path := strings.Join([]string{ociBlobsDir, desc.Digest.Algorithm().String(), desc.Digest.Encoded()}, "/")
+		path := strings.Join([]string{"blobs", desc.Digest.Algorithm().String(), desc.Digest.Encoded()}, "/")
 		fsys[path] = &fstest.MapFile{Data: blobs[i]}
 	}
 	fsys[ocispec.ImageLayoutFile] = &fstest.MapFile{Data: layoutJSON}
-	fsys[ociImageIndexFile] = &fstest.MapFile{Data: indexJSON}
+	fsys["index.json"] = &fstest.MapFile{Data: indexJSON}
 
 	// test read-only store
 	ctx := context.Background()
@@ -717,11 +717,11 @@ func TestReadOnlyStore_Tags(t *testing.T) {
 	// build fs
 	fsys := fstest.MapFS{}
 	for i, desc := range descs {
-		path := strings.Join([]string{ociBlobsDir, desc.Digest.Algorithm().String(), desc.Digest.Encoded()}, "/")
+		path := strings.Join([]string{"blobs", desc.Digest.Algorithm().String(), desc.Digest.Encoded()}, "/")
 		fsys[path] = &fstest.MapFile{Data: blobs[i]}
 	}
 	fsys[ocispec.ImageLayoutFile] = &fstest.MapFile{Data: layoutJSON}
-	fsys[ociImageIndexFile] = &fstest.MapFile{Data: indexJSON}
+	fsys["index.json"] = &fstest.MapFile{Data: indexJSON}
 
 	// test read-only store
 	ctx := context.Background()

content/oci/readonlystorage.go

@@ -95,5 +95,5 @@ func blobPath(dgst digest.Digest) (string, error) {
 		return "", fmt.Errorf("cannot calculate blob path from invalid digest %s: %w: %v",
 			dgst.String(), errdef.ErrInvalidDigest, err)
 	}
-	return path.Join(ociBlobsDir, dgst.Algorithm().String(), dgst.Encoded()), nil
+	return path.Join(ocispec.ImageBlobsDir, dgst.Algorithm().String(), dgst.Encoded()), nil
 }

content/oci/readonlystorage_test.go

@@ -38,7 +38,7 @@ func TestReadOnlyStorage_Exists(t *testing.T) {
 	dgst := digest.FromBytes(blob)
 	desc := content.NewDescriptorFromBytes("", blob)
 	fsys := fstest.MapFS{
-		strings.Join([]string{ociBlobsDir, dgst.Algorithm().String(), dgst.Encoded()}, "/"): {},
+		strings.Join([]string{"blobs", dgst.Algorithm().String(), dgst.Encoded()}, "/"): {},
 	}
 	s := NewStorageFromFS(fsys)
 	ctx := context.Background()
@@ -76,7 +76,7 @@ func TestReadOnlyStorage_Fetch(t *testing.T) {
 	dgst := digest.FromBytes(blob)
 	desc := content.NewDescriptorFromBytes("", blob)
 	fsys := fstest.MapFS{
-		strings.Join([]string{ociBlobsDir, dgst.Algorithm().String(), dgst.Encoded()}, "/"): {
+		strings.Join([]string{"blobs", dgst.Algorithm().String(), dgst.Encoded()}, "/"): {
 			Data: blob,
 		},
 	}
@@ -123,7 +123,7 @@ func TestReadOnlyStorage_DirFS(t *testing.T) {
 	dgst := digest.FromBytes(blob)
 	desc := content.NewDescriptorFromBytes("test", blob)
 	// write blob to disk
-	path := filepath.Join(tempDir, ociBlobsDir, dgst.Algorithm().String(), dgst.Encoded())
+	path := filepath.Join(tempDir, "blobs", dgst.Algorithm().String(), dgst.Encoded())
 	if err := os.MkdirAll(filepath.Dir(path), 0777); err != nil {
 		t.Fatal("error calling Mkdir(), error =", err)
 	}

content/oci/storage_test.go

@@ -289,7 +289,7 @@ func TestStorage_Fetch_ExistingBlobs(t *testing.T) {
 	}
 
 	tempDir := t.TempDir()
-	path := filepath.Join(tempDir, ociBlobsDir, dgst.Algorithm().String(), dgst.Encoded())
+	path := filepath.Join(tempDir, "blobs", dgst.Algorithm().String(), dgst.Encoded())
 	if err := os.MkdirAll(filepath.Dir(path), 0777); err != nil {
 		t.Fatal("error calling Mkdir(), error =", err)
 	}

go.mod

@@ -4,6 +4,6 @@ go 1.20
 
 require (
 	github.com/opencontainers/go-digest v1.0.0
-	github.com/opencontainers/image-spec v1.1.0-rc4
+	github.com/opencontainers/image-spec v1.1.0-rc5
 	golang.org/x/sync v0.4.0
 )

go.sum

@@ -1,6 +1,6 @@
 github.com/opencontainers/go-digest v1.0.0 h1:apOUWs51W5PlhuyGyz9FCeeBIOUDA/6nW8Oi/yOhh5U=
 github.com/opencontainers/go-digest v1.0.0/go.mod h1:0JzlMkj0TRzQZfJkVvzbP0HBR3IKzErnv2BNG4W4MAM=
-github.com/opencontainers/image-spec v1.1.0-rc4 h1:oOxKUJWnFC4YGHCCMNql1x4YaDfYBTS5Y4x/Cgeo1E0=
-github.com/opencontainers/image-spec v1.1.0-rc4/go.mod h1:X4pATf0uXsnn3g5aiGIsVnJBR4mxhKzfwmvK/B2NTm8=
+github.com/opencontainers/image-spec v1.1.0-rc5 h1:Ygwkfw9bpDvs+c9E34SdgGOj41dX/cbdlwvlWt0pnFI=
+github.com/opencontainers/image-spec v1.1.0-rc5/go.mod h1:X4pATf0uXsnn3g5aiGIsVnJBR4mxhKzfwmvK/B2NTm8=
 golang.org/x/sync v0.4.0 h1:zxkM55ReGkDlKSM+Fu41A+zmbZuaPVbGMzvvdUPznYQ=
 golang.org/x/sync v0.4.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=

registry/remote/example_test.go

@@ -40,18 +40,20 @@ import (
 )
 
 const (
-	exampleRepositoryName                 = "example"
-	exampleTag                            = "latest"
-	exampleConfig                         = "Example config content"
-	exampleLayer                          = "Example layer content"
-	exampleUploadUUid                     = "0bc84d80-837c-41d9-824e-1907463c53b3"
-	ManifestDigest                        = "sha256:0b696106ecd0654e031f19e0a8cbd1aee4ad457d7c9cea881f07b12a930cd307"
-	ReferenceManifestDigest               = "sha256:6983f495f7ee70d43e571657ae8b39ca3d3ca1b0e77270fd4fbddfb19832a1cf"
+	_                     = ExampleUnplayable
+	exampleRepositoryName = "example"
+	exampleTag            = "latest"
+	exampleConfig         = "Example config content"
+	exampleLayer          = "Example layer content"
+	exampleUploadUUid     = "0bc84d80-837c-41d9-824e-1907463c53b3"
+	// For ExampleRepository_Push_artifactReferenceManifest:
+	ManifestDigest          = "sha256:a3f9d449466b9b7194c3a76ca4890d792e11eb4e62e59aa8b4c3cce0a56f129d"
+	ReferenceManifestDigest = "sha256:2d30397701742b04550891851529abe6b071e4fae920a91897d34612662a3bf6"
+	// For Example_pushAndIgnoreReferrersIndexError:
 	referrersAPIUnavailableRepositoryName = "no-referrers-api"
-	referrerDigest                        = "sha256:21c623eb8ccd273f2702efd74a0abb455dd06a99987f413c2114fb00961ebfe7"
+	referrerDigest                        = "sha256:4caba1e18385eb152bd92e9fee1dc01e47c436e594123b3c2833acfcad9883e2"
 	referrersTag                          = "sha256-c824a9aa7d2e3471306648c6d4baa1abbcb97ff0276181ab4722ca27127cdba0"
 	referrerIndexDigest                   = "sha256:7baac5147dd58d56fdbaad5a888fa919235a3a90cb71aaa8b56ee5d19f4cd838"
-	_                                     = ExampleUnplayable
 )
 
 var (
@@ -107,8 +109,10 @@ var (
 		Size:         int64(len(exampleManifestWithBlobs))}
 	subjectDescriptor          = content.NewDescriptorFromBytes(ocispec.MediaTypeImageManifest, []byte(`{"layers":[]}`))
 	referrerManifestContent, _ = json.Marshal(ocispec.Manifest{
+		Versioned: specs.Versioned{SchemaVersion: 2},
 		MediaType: ocispec.MediaTypeImageManifest,
 		Subject:   &subjectDescriptor,
+		Config:    ocispec.DescriptorEmptyJSON,
 	})
 	referrerDescriptor = content.NewDescriptorFromBytes(ocispec.MediaTypeImageManifest, referrerManifestContent)
 	referrerIndex, _   = json.Marshal(ocispec.Index{
@@ -304,7 +308,11 @@ func ExampleRepository_Push_artifactReferenceManifest() {
 
 	// 1. assemble the referenced artifact manifest
 	manifest := ocispec.Manifest{
+		Versioned: specs.Versioned{
+			SchemaVersion: 2, // historical value. does not pertain to OCI or docker version
+		},
 		MediaType: ocispec.MediaTypeImageManifest,
+		Config:    content.NewDescriptorFromBytes(ocispec.MediaTypeImageConfig, []byte("config bytes")),
 	}
 	manifestContent, err := json.Marshal(manifest)
 	if err != nil {