feat: support manifest and blob deletion for OCI layout

cmd/oras/internal/option/target.go

@@ -28,8 +28,10 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/pflag"
 	"oras.land/oras-go/v2"
+	"oras.land/oras-go/v2/content"
 	"oras.land/oras-go/v2/content/oci"
 	"oras.land/oras-go/v2/registry"
+	"oras.land/oras-go/v2/registry/remote"
 	oerrors "oras.land/oras/cmd/oras/internal/errors"
 	"oras.land/oras/cmd/oras/internal/fileref"
 )
@@ -114,26 +116,69 @@ func parseOCILayoutReference(raw string) (path string, ref string, err error) {
 	return
 }
 
+func (opts *Target) newOCIStore() (*oci.Store, error) {
+	var err error
+	opts.Path, opts.Reference, err = parseOCILayoutReference(opts.RawReference)
+	if err != nil {
+		return nil, err
+	}
+	return oci.New(opts.Path)
+}
+
+func (opts *Target) newRepository(common Common, logger logrus.FieldLogger) (*remote.Repository, error) {
+	repo, err := opts.NewRepository(opts.RawReference, common, logger)
+	if err != nil {
+		return nil, err
+	}
+	tmp := repo.Reference
+	tmp.Reference = ""
+	opts.Path = tmp.String()
+	opts.Reference = repo.Reference.Reference
+	return repo, nil
+}
+
 // NewTarget generates a new target based on opts.
 func (opts *Target) NewTarget(common Common, logger logrus.FieldLogger) (oras.GraphTarget, error) {
 	switch opts.Type {
 	case TargetTypeOCILayout:
-		var err error
-		opts.Path, opts.Reference, err = parseOCILayoutReference(opts.RawReference)
+		return opts.newOCIStore()
+	case TargetTypeRemote:
+		return opts.newRepository(common, logger)
+	}
+	return nil, fmt.Errorf("unknown target type: %q", opts.Type)
+}
+
+type ResolvableDeleter interface {
+	content.Resolver
+	content.Deleter
+}
+
+// NewBlobDeleter generates a new blob deleter based on opts.
+func (opts *Target) NewBlobDeleter(common Common, logger logrus.FieldLogger) (ResolvableDeleter, error) {
+	switch opts.Type {
+	case TargetTypeOCILayout:
+		return opts.newOCIStore()
+	case TargetTypeRemote:
+		repo, err := opts.newRepository(common, logger)
 		if err != nil {
 			return nil, err
 		}
-		return oci.New(opts.Path)
+		return repo.Blobs(), nil
+	}
+	return nil, fmt.Errorf("unknown target type: %q", opts.Type)
+}
+
+// NewManifestDeleter generates a new blob deleter based on opts.
+func (opts *Target) NewManifestDeleter(common Common, logger logrus.FieldLogger) (ResolvableDeleter, error) {
+	switch opts.Type {
+	case TargetTypeOCILayout:
+		return opts.newOCIStore()
 	case TargetTypeRemote:
-		repo, err := opts.NewRepository(opts.RawReference, common, logger)
+		repo, err := opts.newRepository(common, logger)
 		if err != nil {
 			return nil, err
 		}
-		tmp := repo.Reference
-		tmp.Reference = ""
-		opts.Path = tmp.String()
-		opts.Reference = repo.Reference.Reference
-		return repo, nil
+		return repo.Manifests(), nil
 	}
 	return nil, fmt.Errorf("unknown target type: %q", opts.Type)
 }

cmd/oras/root/blob/delete.go

@@ -33,9 +33,7 @@ type deleteBlobOptions struct {
 	option.Confirmation
 	option.Descriptor
 	option.Pretty
-	option.Remote
-
-	targetRef string
+	option.Target
 }
 
 func deleteCmd() *cobra.Command {
@@ -57,13 +55,13 @@ Example - Delete a blob and print its descriptor:
   `,
 		Args: cobra.ExactArgs(1),
 		PreRunE: func(cmd *cobra.Command, args []string) error {
+			opts.RawReference = args[0]
 			if opts.OutputDescriptor && !opts.Force {
 				return errors.New("must apply --force to confirm the deletion if the descriptor is outputted")
 			}
 			return option.Parse(&opts)
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
-			opts.targetRef = args[0]
 			return deleteBlob(cmd.Context(), opts)
 		},
 	}
@@ -74,27 +72,25 @@ Example - Delete a blob and print its descriptor:
 
 func deleteBlob(ctx context.Context, opts deleteBlobOptions) (err error) {
 	ctx, logger := opts.WithContext(ctx)
-	repo, err := opts.NewRepository(opts.targetRef, opts.Common, logger)
+	blobs, err := opts.NewBlobDeleter(opts.Common, logger)
 	if err != nil {
 		return err
 	}
-
-	if _, err = repo.Reference.Digest(); err != nil {
-		return fmt.Errorf("%s: blob reference must be of the form <name@digest>", opts.targetRef)
+	if err := opts.EnsureReferenceNotEmpty(); err != nil {
+		return err
 	}
 
 	// add both pull and delete scope hints for dst repository to save potential delete-scope token requests during deleting
-	ctx = registryutil.WithScopeHint(ctx, repo, auth.ActionPull, auth.ActionDelete)
-	blobs := repo.Blobs()
-	desc, err := blobs.Resolve(ctx, opts.targetRef)
+	ctx = registryutil.WithScopeHint(ctx, blobs, auth.ActionPull, auth.ActionDelete)
+	desc, err := blobs.Resolve(ctx, opts.Reference)
 	if err != nil {
 		if errors.Is(err, errdef.ErrNotFound) {
 			if opts.Force && !opts.OutputDescriptor {
 				// ignore nonexistent
-				fmt.Println("Missing", opts.targetRef)
+				fmt.Println("Missing", opts.RawReference)
 				return nil
 			}
-			return fmt.Errorf("%s: the specified blob does not exist", opts.targetRef)
+			return fmt.Errorf("%s: the specified blob does not exist", opts.RawReference)
 		}
 		return err
 	}
@@ -109,7 +105,7 @@ func deleteBlob(ctx context.Context, opts deleteBlobOptions) (err error) {
 	}
 
 	if err = blobs.Delete(ctx, desc); err != nil {
-		return fmt.Errorf("failed to delete %s: %w", opts.targetRef, err)
+		return fmt.Errorf("failed to delete %s: %w", opts.RawReference, err)
 	}
 
 	if opts.OutputDescriptor {
@@ -120,7 +116,7 @@ func deleteBlob(ctx context.Context, opts deleteBlobOptions) (err error) {
 		return opts.Output(os.Stdout, descJSON)
 	}
 
-	fmt.Println("Deleted", opts.targetRef)
+	fmt.Println("Deleted", opts.AnnotatedReference())
 
 	return nil
 }

cmd/oras/root/manifest/delete.go

@@ -24,7 +24,6 @@ import (
 	"github.com/spf13/cobra"
 	"oras.land/oras-go/v2/errdef"
 	"oras.land/oras-go/v2/registry/remote/auth"
-	oerrors "oras.land/oras/cmd/oras/internal/errors"
 	"oras.land/oras/cmd/oras/internal/option"
 	"oras.land/oras/internal/registryutil"
 )
@@ -34,9 +33,7 @@ type deleteOptions struct {
 	option.Confirmation
 	option.Descriptor
 	option.Pretty
-	option.Remote
-
-	targetRef string
+	option.Target
 }
 
 func deleteCmd() *cobra.Command {
@@ -61,13 +58,13 @@ Example - Delete a manifest by digest 'sha256:99e4703fbf30916f549cd6bfa9cdbab614
 `,
 		Args: cobra.ExactArgs(1),
 		PreRunE: func(cmd *cobra.Command, args []string) error {
+			opts.RawReference = args[0]
 			if opts.OutputDescriptor && !opts.Force {
 				return errors.New("must apply --force to confirm the deletion if the descriptor is outputted")
 			}
 			return option.Parse(&opts)
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
-			opts.targetRef = args[0]
 			return deleteManifest(cmd.Context(), opts)
 		},
 	}
@@ -79,13 +76,12 @@ Example - Delete a manifest by digest 'sha256:99e4703fbf30916f549cd6bfa9cdbab614
 
 func deleteManifest(ctx context.Context, opts deleteOptions) error {
 	ctx, logger := opts.WithContext(ctx)
-	repo, err := opts.NewRepository(opts.targetRef, opts.Common, logger)
+	manifests, err := opts.NewManifestDeleter(opts.Common, logger)
 	if err != nil {
 		return err
 	}
-
-	if repo.Reference.Reference == "" {
-		return oerrors.NewErrEmptyTagOrDigest(repo.Reference)
+	if err := opts.EnsureReferenceNotEmpty(); err != nil {
+		return err
 	}
 
 	// add both pull and delete scope hints for dst repository to save potential delete-scope token requests during deleting
@@ -94,17 +90,16 @@ func deleteManifest(ctx context.Context, opts deleteOptions) error {
 		// possibly needed when adding a new referrers index
 		hints = append(hints, auth.ActionPush)
 	}
-	ctx = registryutil.WithScopeHint(ctx, repo, hints...)
-	manifests := repo.Manifests()
-	desc, err := manifests.Resolve(ctx, opts.targetRef)
+	ctx = registryutil.WithScopeHint(ctx, manifests, hints...)
+	desc, err := manifests.Resolve(ctx, opts.Reference)
 	if err != nil {
 		if errors.Is(err, errdef.ErrNotFound) {
 			if opts.Force && !opts.OutputDescriptor {
 				// ignore nonexistent
-				fmt.Println("Missing", opts.targetRef)
+				fmt.Println("Missing", opts.RawReference)
 				return nil
 			}
-			return fmt.Errorf("%s: the specified manifest does not exist", opts.targetRef)
+			return fmt.Errorf("%s: the specified manifest does not exist", opts.RawReference)
 		}
 		return err
 	}
@@ -119,7 +114,7 @@ func deleteManifest(ctx context.Context, opts deleteOptions) error {
 	}
 
 	if err = manifests.Delete(ctx, desc); err != nil {
-		return fmt.Errorf("failed to delete %s: %w", opts.targetRef, err)
+		return fmt.Errorf("failed to delete %s: %w", opts.RawReference, err)
 	}
 
 	if opts.OutputDescriptor {
@@ -130,7 +125,7 @@ func deleteManifest(ctx context.Context, opts deleteOptions) error {
 		return opts.Output(os.Stdout, descJSON)
 	}
 
-	fmt.Println("Deleted", opts.targetRef)
+	fmt.Println("Deleted", opts.AnnotatedReference())
 
 	return nil
 }

go.mod

@@ -14,7 +14,7 @@ require (
 	golang.org/x/sync v0.5.0
 	golang.org/x/term v0.15.0
 	gopkg.in/yaml.v3 v3.0.1
-	oras.land/oras-go/v2 v2.3.1-0.20231026053328-062ed0e058f8
+	oras.land/oras-go/v2 v2.3.1-0.20231121114731-79a08b452e76
 )
 
 require (

go.sum

@@ -41,3 +41,5 @@ gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 oras.land/oras-go/v2 v2.3.1-0.20231026053328-062ed0e058f8 h1:MOs3GufGAl0KY0e19iZ0aYjFQFSFqY9+a/Elt8ThzdI=
 oras.land/oras-go/v2 v2.3.1-0.20231026053328-062ed0e058f8/go.mod h1:5AQXVEu1X/FKp1F9DMOb5ZItZBOa0y5dha0yCm4NR9c=
+oras.land/oras-go/v2 v2.3.1-0.20231121114731-79a08b452e76 h1:U3oxpjdj2zkw35OjhBaa7xLloGXPPGjwpC8Czp5+zTk=
+oras.land/oras-go/v2 v2.3.1-0.20231121114731-79a08b452e76/go.mod h1:W2rj9/rGtsTh9lmU3S0uq3iwvR6wNvUuD8nmOFmWBUY=

test/e2e/suite/command/blob.go

@@ -245,12 +245,32 @@ var _ = Describe("1.1 registry users:", func() {
 
 var _ = Describe("OCI image layout users:", func() {
 	When("running `blob delete`", func() {
-		It("should not support deleting a blob", func() {
+		It("should delete a blob with interactive confirmation", func() {
+			// prepare
 			toDeleteRef := LayoutRef(PrepareTempOCI(ImageRepo), foobar.FooBlobDigest)
+			// test
 			ORAS("blob", "delete", Flags.Layout, toDeleteRef).
 				WithInput(strings.NewReader("y")).
-				MatchErrKeyWords("Error:", "unknown flag", Flags.Layout).
-				ExpectFailure().
+				MatchKeyWords("Deleted", toDeleteRef).Exec()
+			// validate
+			ORAS("blob", "fetch", toDeleteRef, Flags.Layout, "--output", "-").ExpectFailure().Exec()
+		})
+
+		It("should delete a blob with force flag and output descriptor", func() {
+			// prepare
+			toDeleteRef := LayoutRef(PrepareTempOCI(ImageRepo), foobar.FooBlobDigest)
+			// test
+			ORAS("blob", "delete", Flags.Layout, toDeleteRef, "--force", "--descriptor").MatchContent(foobar.FooBlobDescriptor).Exec()
+			// validate
+			ORAS("blob", "fetch", Flags.Layout, toDeleteRef, "--output", "-").ExpectFailure().Exec()
+		})
+
+		It("should return success when deleting a non-existent blob with force flag set", func() {
+			// prepare
+			toDeleteRef := RegistryRef(ZOTHost, ImageRepo, invalidDigest)
+			// test
+			ORAS("blob", "delete", Flags.Layout, toDeleteRef, "--force").
+				MatchKeyWords("Missing", toDeleteRef).
 				Exec()
 		})
 	})

test/e2e/suite/command/manifest.go

@@ -494,6 +494,46 @@ var _ = Describe("OCI image layout users:", func() {
 			ORAS("manifest", "fetch-config", Flags.Layout, root).ExpectFailure().MatchErrKeyWords("Error:", "no tag or digest").Exec()
 		})
 	})
+
+	When("running `manifest delete`", func() {
+		It("should do confirmed deletion via input", func() {
+			// prepare
+			toDeleteRef := LayoutRef(PrepareTempOCI(ImageRepo), foobar.Tag)
+			// test
+			ORAS("manifest", "delete", Flags.Layout, toDeleteRef).
+				WithInput(strings.NewReader("y")).Exec()
+			// validate
+			ORAS("manifest", "fetch", Flags.Layout, toDeleteRef).ExpectFailure().MatchErrKeyWords(": not found").Exec()
+		})
+
+		It("should do confirmed deletion via flag", func() {
+			// prepare
+			toDeleteRef := LayoutRef(PrepareTempOCI(ImageRepo), foobar.Tag)
+			// test
+			ORAS("manifest", "delete", Flags.Layout, toDeleteRef, "-f").Exec()
+			// validate
+			ORAS("manifest", "fetch", Flags.Layout, toDeleteRef).ExpectFailure().MatchErrKeyWords(": not found").Exec()
+		})
+
+		It("should do forced deletion and output descriptor", func() {
+			// prepare
+			toDeleteRef := LayoutRef(PrepareTempOCI(ImageRepo), foobar.Tag)
+			// test
+			ORAS("manifest", "delete", Flags.Layout, toDeleteRef, "-f", "--descriptor").
+				MatchContent("{\"mediaType\":\"application/vnd.oci.image.manifest.v1+json\",\"digest\":\"sha256:fd6ed2f36b5465244d5dc86cb4e7df0ab8a9d24adc57825099f522fe009a22bb\",\"size\":851,\"annotations\":{\"org.opencontainers.image.ref.name\":\"foobar\"}}").
+				Exec()
+			// validate
+			ORAS("manifest", "fetch", Flags.Layout, toDeleteRef).MatchErrKeyWords(": not found").ExpectFailure().Exec()
+		})
+
+		It("should succeed when deleting a non-existent manifest with force flag set", func() {
+			// prepare
+			toDeleteRef := LayoutRef(PrepareTempOCI(ImageRepo), invalidDigest)
+			ORAS("manifest", "delete", Flags.Layout, toDeleteRef, "--force").
+				MatchKeyWords("Missing", toDeleteRef).
+				Exec()
+		})
+	})
 })
 
 var _ = Describe("1.0 registry users:", func() {