feat: support inspect the config

cmd/inspect.go

@@ -49,6 +49,7 @@ func init() {
 	flags.BoolVar(&inspectConfig.Remote, "remote", false, "inspect model artifact from remote registry")
 	flags.BoolVar(&inspectConfig.PlainHTTP, "plain-http", false, "use plain HTTP instead of HTTPS")
 	flags.BoolVar(&inspectConfig.Insecure, "insecure", false, "allow insecure connections")
+	flags.BoolVar(&inspectConfig.Config, "config", false, "inspect the config of the model artifact")
 
 	if err := viper.BindPFlags(flags); err != nil {
 		panic(fmt.Errorf("bind cache inspect flags to viper: %w", err))

pkg/backend/backend.go

@@ -59,7 +59,7 @@ type Backend interface {
 	Prune(ctx context.Context, dryRun, removeUntagged bool) error
 
 	// Inspect inspects the model artifact.
-	Inspect(ctx context.Context, target string, cfg *config.Inspect) (*InspectedModelArtifact, error)
+	Inspect(ctx context.Context, target string, cfg *config.Inspect) (any, error)
 
 	// Extract extracts the model artifact.
 	Extract(ctx context.Context, target string, cfg *config.Extract) error

pkg/backend/inspect.go

@@ -66,7 +66,7 @@ type InspectedModelArtifactLayer struct {
 }
 
 // Inspect inspects the target from the storage.
-func (b *backend) Inspect(ctx context.Context, target string, cfg *config.Inspect) (*InspectedModelArtifact, error) {
+func (b *backend) Inspect(ctx context.Context, target string, cfg *config.Inspect) (any, error) {
 	logrus.Infof("inspect: starting inspect operation for target %s [config: %+v]", target, cfg)
 	_, err := ParseReference(target)
 	if err != nil {
@@ -92,6 +92,10 @@ func (b *backend) Inspect(ctx context.Context, target string, cfg *config.Inspec
 
 	logrus.Debugf("inspect: loaded model config for target %s [family: %s, name: %s]", target, config.Descriptor.Family, config.Descriptor.Name)
 
+	if cfg.Config {
+		return config, nil
+	}
+
 	inspectedModelArtifact := &InspectedModelArtifact{
 		ID:           manifest.Config.Digest.String(),
 		Digest:       godigest.FromBytes(manifestRaw).String(),

pkg/backend/inspect_test.go

@@ -131,7 +131,8 @@ func TestInspect(t *testing.T) {
 	mockStore.On("PullManifest", ctx, "example.com/repo", "tag").Return([]byte(manifest), "sha256:9ca701e8784e5656e2c36f10f82410a0af4c44f859590a28a3d1519ee1eea89d", nil)
 	mockStore.On("PullBlob", ctx, "example.com/repo", "sha256:e31b55920173ba79526491fbd01efe609c1d0d72c3a83df85b2c4fe74df2eea2").Return(io.NopCloser(bytes.NewReader([]byte(config))), nil)
 
-	inspected, err := b.Inspect(ctx, target, &pkgconfig.Inspect{})
+	inspectedAny, err := b.Inspect(ctx, target, &pkgconfig.Inspect{})
+	inspected := inspectedAny.(*InspectedModelArtifact)
 	assert.NoError(t, err)
 	assert.Equal(t, "sha256:e31b55920173ba79526491fbd01efe609c1d0d72c3a83df85b2c4fe74df2eea2", inspected.ID)
 	assert.Equal(t, "sha256:9ca701e8784e5656e2c36f10f82410a0af4c44f859590a28a3d1519ee1eea89d", inspected.Digest)

pkg/config/inspect.go

@@ -20,12 +20,14 @@ type Inspect struct {
 	Remote    bool
 	PlainHTTP bool
 	Insecure  bool
+	Config    bool
 }
 
 func NewInspect() *Inspect {
 	return &Inspect{
 		Remote:    false,
 		PlainHTTP: false,
 		Insecure:  false,
+		Config:    false,
 	}
 }