refactor: add handlers to manifest push commmand

cmd/oras/internal/display/handler.go

@@ -170,8 +170,11 @@ func NewTagHandler(printer *output.Printer, target option.Target) metadata.TagHa
 }
 
 // NewManifestPushHandler returns a manifest push handler.
-func NewManifestPushHandler(printer *output.Printer) metadata.ManifestPushHandler {
-	return text.NewManifestPushHandler(printer)
+func NewManifestPushHandler(printer *output.Printer, outputDescriptor bool, pretty bool, desc ocispec.Descriptor, target *option.Target) (status.ManifestPushHandler, metadata.ManifestPushHandler) {
+	if outputDescriptor {
+		return status.NewDiscardHandler(), metadata.NewDiscardHandler()
+	}
+	return status.NewTextManifestPushHandler(printer, desc), text.NewManifestPushHandler(printer, target)
 }
 
 // NewManifestIndexCreateHandler returns status, metadata and content handlers for index create command.

cmd/oras/internal/display/metadata/discard.go

@@ -31,6 +31,16 @@
 	return nil
 }
 
+// OnManifestPushed implements ManifestPushHandler.
+func (Discard) OnManifestPushed(ocispec.Descriptor) error {
+	return nil
+}
+
+// Render implements ManifestPushHandler.
+func (Discard) Render() error {
+	return nil
+}
+
 // OnTagged implements ManifestIndexCreateHandler.
 func (Discard) OnTagged(ocispec.Descriptor, string) error {
 	return nil

cmd/oras/internal/display/metadata/discard_test.go

@@ -27,3 +27,10 @@ func TestDiscard_OnTagged(t *testing.T) {
 		t.Errorf("testDiscard.OnTagged() error = %v, want nil", err)
 	}
 }
+
+func TestDiscardHandler_OnManifestPushed(t *testing.T) {
+	testDiscard := NewDiscardHandler()
+	if err := testDiscard.OnManifestPushed(ocispec.Descriptor{}); err != nil {
+		t.Errorf("DiscardHandler.OnManifestPushed() error = %v, wantErr nil", err)
+	}
+}

cmd/oras/internal/display/metadata/interface.go

@@ -83,6 +83,9 @@ type TagHandler interface {
 // ManifestPushHandler handles metadata output for manifest push events.
 type ManifestPushHandler interface {
 	TaggedHandler
+	Renderer
+
+	OnManifestPushed(desc ocispec.Descriptor) error
 }
 
 // ManifestIndexCreateHandler handles metadata output for index create events.

cmd/oras/internal/display/metadata/text/manifest_push.go

@@ -18,22 +18,37 @@ package text
 import (
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"oras.land/oras/cmd/oras/internal/display/metadata"
+	"oras.land/oras/cmd/oras/internal/option"
 	"oras.land/oras/cmd/oras/internal/output"
 )
 
 // ManifestPushHandler handles text metadata output for manifest push events.
 type ManifestPushHandler struct {
 	printer *output.Printer
+	target  *option.Target
+	desc    ocispec.Descriptor
 }
 
 // NewManifestPushHandler returns a new handler for manifest push events.
-func NewManifestPushHandler(printer *output.Printer) metadata.ManifestPushHandler {
+func NewManifestPushHandler(printer *output.Printer, target *option.Target) metadata.ManifestPushHandler {
 	return &ManifestPushHandler{
 		printer: printer,
+		target:  target,
 	}
 }
 
 // OnTagged implements metadata.TaggedHandler.
 func (h *ManifestPushHandler) OnTagged(_ ocispec.Descriptor, tag string) error {
 	return h.printer.Println("Tagged", tag)
 }
+
+// OnManifestPushed implements metadata.ManifestPushHandler.
+func (h *ManifestPushHandler) OnManifestPushed(desc ocispec.Descriptor) error {
+	h.desc = desc
+	return h.printer.Println("Pushed:", h.target.AnnotatedReference())
+}
+
+// Render implements metadata.ManifestPushHandler.
+func (h *ManifestPushHandler) Render() error {
+	return h.printer.Println("Digest:", h.desc.Digest)
+}

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

@@ -100,6 +100,21 @@ func (DiscardHandler) OnFetched(string, ocispec.Descriptor) error {
 	return nil
 }
 
+// OnManifestPushSkipped implements ManifestPushHandler.
+func (DiscardHandler) OnManifestPushSkipped() error {
+	return nil
+}
+
+// OnManifestPushing implements ManifestPushHandler.
+func (DiscardHandler) OnManifestPushing() error {
+	return nil
+}
+
+// OnManifestPushed implements ManifestPushHandler.
+func (DiscardHandler) OnManifestPushed() error {
+	return nil
+}
+
 // OnManifestRemoved implements ManifestIndexUpdateHandler.
 func (DiscardHandler) OnManifestRemoved(digest.Digest) error {
 	return nil

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

@@ -21,6 +21,13 @@ import (
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
+func TestDiscardHandler_OnPushSkipped(t *testing.T) {
+	testDiscard := NewDiscardHandler()
+	if err := testDiscard.OnManifestPushSkipped(); err != nil {
+		t.Errorf("DiscardHandler.OnPushSkipped() error = %v, wantErr nil", err)
+	}
+}
+
 func TestDiscardHandler_OnManifestRemoved(t *testing.T) {
 	testDiscard := NewDiscardHandler()
 	if err := testDiscard.OnManifestRemoved("sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a"); err != nil {

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

@@ -66,6 +66,13 @@ type CopyHandler interface {
 	StopTracking() error
 }
 
+// ManifestPushHandler handles status output for manifest push command.
+type ManifestPushHandler interface {
+	OnManifestPushSkipped() error
+	OnManifestPushing() error
+	OnManifestPushed() error
+}
+
 // ManifestIndexCreateHandler handles status output for manifest index create command.
 type ManifestIndexCreateHandler interface {
 	OnFetching(manifestRef string) error

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

@@ -193,6 +193,32 @@ func (ch *TextCopyHandler) OnMounted(_ context.Context, desc ocispec.Descriptor)
 	return ch.printer.PrintStatus(desc, copyPromptMounted)
 }
 
+// TextManifestPushHandler handles text status output for manifest push events.
+type TextManifestPushHandler struct {
+	desc    ocispec.Descriptor
+	printer *output.Printer
+}
+
+// NewTextManifestPushHandler returns a new handler for manifest push command.
+func NewTextManifestPushHandler(printer *output.Printer, desc ocispec.Descriptor) ManifestPushHandler {
+	return &TextManifestPushHandler{
+		desc:    desc,
+		printer: printer,
+	}
+}
+
+func (mph *TextManifestPushHandler) OnManifestPushSkipped() error {
+	return mph.printer.PrintStatus(mph.desc, PushPromptExists)
+}
+
+func (mph *TextManifestPushHandler) OnManifestPushing() error {
+	return mph.printer.PrintStatus(mph.desc, PushPromptUploading)
+}
+
+func (mph *TextManifestPushHandler) OnManifestPushed() error {
+	return mph.printer.PrintStatus(mph.desc, PushPromptUploaded)
+}
+
 // TextManifestIndexCreateHandler handles text status output for manifest index create events.
 type TextManifestIndexCreateHandler struct {
 	printer *output.Printer

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

@@ -194,6 +194,13 @@ func TestTextPushHandler_PreCopy(t *testing.T) {
 	validatePrinted(t, "Uploading 0b442c23c1dd oci-image")
 }
 
+func TestTextManifestPushHandler_OnPushSkipped(t *testing.T) {
+	mph := NewTextManifestPushHandler(printer, ocispec.Descriptor{})
+	if mph.OnManifestPushSkipped() != nil {
+		t.Error("OnManifestExists() should not return an error")
+	}
+}
+
 func TestTextManifestIndexUpdateHandler_OnManifestAdded(t *testing.T) {
 	tests := []struct {
 		name    string

cmd/oras/root/manifest/push.go

@@ -101,7 +101,7 @@
 			return option.Parse(cmd, &opts)
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
-			opts.Printer.Verbose = opts.verbose && !opts.OutputDescriptor
+			opts.Printer.Verbose = opts.verbose
 			return pushManifest(cmd, opts)
 		},
 	}
@@ -151,6 +151,7 @@
 
 	// prepare manifest descriptor
 	desc := content.NewDescriptorFromBytes(mediaType, contentBytes)
+	statusHandler, metadataHandler := display.NewManifestPushHandler(opts.Printer, opts.OutputDescriptor, opts.Pretty.Pretty, desc, &opts.Target)
 
 	ref := opts.Reference
 	if ref == "" {
@@ -161,17 +162,17 @@
 		return err
 	}
 	if match {
-		if err := opts.Printer.PrintStatus(desc, "Exists"); err != nil {
+		if err := statusHandler.OnManifestPushSkipped(); err != nil {
 			return err
 		}
 	} else {
-		if err = opts.Printer.PrintStatus(desc, "Uploading"); err != nil {
+		if err = statusHandler.OnManifestPushing(); err != nil {
 			return err
 		}
 		if _, err := oras.TagBytes(ctx, target, mediaType, contentBytes, ref); err != nil {
 			return err
 		}
-		if err = opts.Printer.PrintStatus(desc, "Uploaded "); err != nil {
+		if err = statusHandler.OnManifestPushed(); err != nil {
 			return err
 		}
 	}
@@ -192,18 +193,17 @@
 		}
 		return opts.Output(os.Stdout, descJSON)
 	}
-	_ = opts.Printer.Println("Pushed", opts.AnnotatedReference())
+	if err := metadataHandler.OnManifestPushed(desc); err != nil {
+		return err
+	}
 	if len(opts.extraRefs) != 0 {
-		handler := display.NewManifestPushHandler(opts.Printer)
-		tagListener := listener.NewTaggedListener(target, handler.OnTagged)
+		tagListener := listener.NewTaggedListener(target, metadataHandler.OnTagged)
 		if _, err = oras.TagBytesN(ctx, tagListener, mediaType, contentBytes, opts.extraRefs, tagBytesNOpts); err != nil {
 			return err
 		}
 	}
 
-	_ = opts.Printer.Println("Digest:", desc.Digest)
-
-	return nil
+	return metadataHandler.Render()
 }
 
 // matchDigest checks whether the manifest's digest matches to it in the remote