refactor: Move generate content key method to descriptor

cmd/oras/internal/display/status/utils.go

@@ -15,14 +15,6 @@ limitations under the License.
 
 package status
 
-import ocispec "github.com/opencontainers/image-spec/specs-go/v1"
-
-// GenerateContentKey generates a unique key for each content descriptor, using
-// its digest and name if applicable.
-func GenerateContentKey(desc ocispec.Descriptor) string {
-	return desc.Digest.String() + desc.Annotations[ocispec.AnnotationTitle]
-}
-
 // Prompts for pull events.
 const (
 	PullPromptDownloading = "Downloading"

cmd/oras/root/pull.go

@@ -35,6 +35,7 @@ import (
 	oerrors "oras.land/oras/cmd/oras/internal/errors"
 	"oras.land/oras/cmd/oras/internal/fileref"
 	"oras.land/oras/cmd/oras/internal/option"
+	"oras.land/oras/internal/descriptor"
 	"oras.land/oras/internal/graph"
 )
 
@@ -172,7 +173,7 @@ func doPull(ctx context.Context, src oras.ReadOnlyTarget, dst oras.GraphTarget,
 	var getConfigOnce sync.Once
 	opts.FindSuccessors = func(ctx context.Context, fetcher content.Fetcher, desc ocispec.Descriptor) ([]ocispec.Descriptor, error) {
 		statusFetcher := content.FetcherFunc(func(ctx context.Context, target ocispec.Descriptor) (fetched io.ReadCloser, fetchErr error) {
-			if _, ok := printed.LoadOrStore(status.GenerateContentKey(target), true); ok {
+			if _, ok := printed.LoadOrStore(descriptor.GenerateContentKey(target), true); ok {
 				return fetcher.Fetch(ctx, target)
 			}
 			if err := statusHandler.OnNodeDownloading(target); err != nil {
@@ -260,7 +261,7 @@ func doPull(ctx context.Context, src oras.ReadOnlyTarget, dst oras.GraphTarget,
 				}
 			}
 		}
-		printed.Store(status.GenerateContentKey(desc), true)
+		printed.Store(descriptor.GenerateContentKey(desc), true)
 		return statusHandler.OnNodeDownloaded(desc)
 	}
 
@@ -270,7 +271,7 @@ func doPull(ctx context.Context, src oras.ReadOnlyTarget, dst oras.GraphTarget,
 }
 
 func notifyOnce(notified *sync.Map, s ocispec.Descriptor, notify func(ocispec.Descriptor) error) error {
-	if _, loaded := notified.LoadOrStore(status.GenerateContentKey(s), true); !loaded {
+	if _, loaded := notified.LoadOrStore(descriptor.GenerateContentKey(s), true); !loaded {
 		return notify(s)
 	}
 	return nil

internal/descriptor/descriptor.go

@@ -46,3 +46,9 @@ func GetTitleOrMediaType(desc ocispec.Descriptor) (name string, isTitle bool) {
 	}
 	return name, true
 }
+
+// GenerateContentKey generates a unique key for each content descriptor using
+// digest and name.
+func GenerateContentKey(desc ocispec.Descriptor) string {
+	return desc.Digest.String() + desc.Annotations[ocispec.AnnotationTitle]
+}

internal/descriptor/descriptor_test.go

@@ -23,26 +23,71 @@ import (
 	"oras.land/oras/internal/descriptor"
 )
 
-func TestIsImageManifest(t *testing.T) {
-	imageDesc := ocispec.Descriptor{
+var (
+	artifactDesc = ocispec.Descriptor{
+		MediaType: "application/vnd.cncf.oras.artifact.manifest.v1+json",
+		Digest:    "sha256:772fbebcda7e6937de01295bae28360afd463c2d5f1f7aca59a3ef267608bc66",
+		Size:      568,
+	}
+
+	imageDesc = ocispec.Descriptor{
 		MediaType: "application/vnd.oci.image.manifest.v1+json",
 		Digest:    "sha256:2e0e0fe1fb3edbcdddad941c90d2b51e25a6bcd593e82545441a216de7bfa834",
 		Size:      474,
 	}
 
+	titledDesc = ocispec.Descriptor{
+		MediaType:   "application/vnd.oci.image.manifest.v1+json",
+		Digest:      "sha256:2e0e0fe1fb3edbcdddad941c90d2b51e25a6bcd593e82545441a216de7bfa834",
+		Size:        474,
+		Annotations: map[string]string{"org.opencontainers.image.title": "shaboozey"},
+	}
+)
+
+func TestDescriptor_IsImageManifest(t *testing.T) {
 	got := descriptor.IsImageManifest(imageDesc)
 	if !reflect.DeepEqual(got, true) {
 		t.Fatalf("IsImageManifest() got %v, want %v", got, true)
 	}
 
-	artifactDesc := ocispec.Descriptor{
-		MediaType: "application/vnd.cncf.oras.artifact.manifest.v1+json",
-		Digest:    "sha256:772fbebcda7e6937de01295bae28360afd463c2d5f1f7aca59a3ef267608bc66",
-		Size:      568,
-	}
-
 	got = descriptor.IsImageManifest(artifactDesc)
 	if !reflect.DeepEqual(got, false) {
 		t.Fatalf("IsImageManifest() got %v, want %v", got, false)
 	}
 }
+
+func TestDescriptor_ShortDigest(t *testing.T) {
+	expected := "2e0e0fe1fb3e"
+	got := descriptor.ShortDigest(titledDesc)
+	if expected != got {
+		t.Fatalf("GetTitleOrMediaType() got %v, want %v", got, expected)
+	}
+}
+
+func TestDescriptor_GetTitleOrMediaType(t *testing.T) {
+	expected := "application/vnd.oci.image.manifest.v1+json"
+	name, isTitle := descriptor.GetTitleOrMediaType(imageDesc)
+	if expected != name {
+		t.Fatalf("GetTitleOrMediaType() got %v, want %v", name, expected)
+	}
+	if false != isTitle {
+		t.Fatalf("GetTitleOrMediaType() got %v, want %v", isTitle, false)
+	}
+
+	expected = "shaboozey"
+	name, isTitle = descriptor.GetTitleOrMediaType(titledDesc)
+	if expected != name {
+		t.Fatalf("GetTitleOrMediaType() got %v, want %v", name, expected)
+	}
+	if true != isTitle {
+		t.Fatalf("GetTitleOrMediaType() got %v, want %v", isTitle, false)
+	}
+}
+
+func TestDescriptor_GenerateContentKey(t *testing.T) {
+	expected := "sha256:2e0e0fe1fb3edbcdddad941c90d2b51e25a6bcd593e82545441a216de7bfa834shaboozey"
+	got := descriptor.GenerateContentKey(titledDesc)
+	if expected != got {
+		t.Fatalf("GetTitleOrMediaType() got %v, want %v", got, expected)
+	}
+}