update support for artifactType when config mediatype is empty

Signed-off-by: yminer <yminer@vmware.com>

src/controller/artifact/abstractor.go

@@ -131,7 +131,12 @@ func (a *abstractor) abstractManifestV2Metadata(artifact *artifact.Artifact, con
 	if manifest.Annotations[wasm.AnnotationVariantKey] == wasm.AnnotationVariantValue || manifest.Annotations[wasm.AnnotationHandlerKey] == wasm.AnnotationHandlerValue {
 		artifact.MediaType = wasm.MediaType
 	}
-
+	// https://github.com/opencontainers/image-spec/blob/v1.1.0/specs-go/v1/mediatype.go
+	// if config descriptor is empty JSON{}, using manifest.ArtifactType as artifact.MediaType
+	// artifacts have historically been created without an artifactType field, and tooling to work with artifacts should fallback to the config.mediaType value.
+	if manifest.Config.MediaType == v1.MediaTypeEmptyJSON && manifest.ArtifactType != "" {
+		artifact.MediaType = manifest.ArtifactType
+	}
 	// set size
 	artifact.Size = int64(len(content)) + manifest.Config.Size
 	for _, layer := range manifest.Layers {

src/controller/artifact/abstractor_test.go

@@ -175,7 +175,27 @@ var (
     "com.example.key1": "value1"
   }
 }`
-
+	v2ManifestWithEmptyConfig = `{
+   "schemaVersion": 2,
+   "mediaType": "application/vnd.oci.image.manifest.v1+json",
+   "artifactType": "application/vnd.example+type",
+   "config": {
+     "mediaType": "application/vnd.oci.empty.v1+json",
+     "digest": "sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a",
+     "size": 2
+   },
+   "layers": [
+     {
+       "mediaType": "application/vnd.example+type",
+       "digest": "sha256:e258d248fda94c63753607f7c4494ee0fcbe92f1a76bfdac795c9d84101eb317",
+       "size": 1234
+     }
+   ],
+   "annotations": {
+     "oci.opencontainers.image.created": "2023-01-02T03:04:05Z",
+     "com.example.data": "payload"
+   }
+}`
 	index = `{
   "schemaVersion": 2,
   "manifests": [
@@ -267,6 +287,26 @@ func (a *abstractorTestSuite) TestAbstractMetadataOfV2Manifest() {
 	a.Equal("value1", artifact.Annotations["com.example.key1"])
 }
 
+// empty config layer
+func (a *abstractorTestSuite) TestAbstractMetadataOfV2ManifestWithEmptyConfig() {
+	// v1.MediaTypeImageManifest
+	manifest, _, err := distribution.UnmarshalManifest(v1.MediaTypeImageManifest, []byte(v2ManifestWithEmptyConfig))
+	a.Require().Nil(err)
+	a.regCli.On("PullManifest", mock.Anything, mock.Anything).Return(manifest, "", nil)
+	artifact := &artifact.Artifact{
+		ID: 1,
+	}
+	a.processor.On("AbstractMetadata", mock.Anything, mock.Anything, mock.Anything).Return(nil)
+	err = a.abstractor.AbstractMetadata(nil, artifact)
+	a.Require().Nil(err)
+	a.Assert().Equal(int64(1), artifact.ID)
+	a.Assert().Equal(v1.MediaTypeImageManifest, artifact.ManifestMediaType)
+	a.Assert().Equal("application/vnd.example+type", artifact.MediaType)
+	a.Assert().Equal(int64(1880), artifact.Size)
+	a.Require().Len(artifact.Annotations, 2)
+	a.Equal("payload", artifact.Annotations["com.example.data"])
+}
+
 // OCI index
 func (a *abstractorTestSuite) TestAbstractMetadataOfIndex() {
 	manifest, _, err := distribution.UnmarshalManifest(v1.MediaTypeImageIndex, []byte(index))

src/controller/artifact/processor/default_test.go

@@ -142,6 +142,29 @@ var (
     }
  }`
 	unknownConfig = `{NHL Peanut Butter on my NHL bagel}`
+
+	v2ManifestWithEmptyConfig = `{
+    "schemaVersion": 2,
+    "mediaType": "application/vnd.oci.image.manifest.v1+json",
+    "artifactType": "application/vnd.example+type",
+    "config": {
+      "mediaType": "application/vnd.oci.empty.v1+json",
+      "digest": "sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a",
+      "size": 2
+    },
+    "layers": [
+      {
+        "mediaType": "application/vnd.example+type",
+        "digest": "sha256:e258d248fda94c63753607f7c4494ee0fcbe92f1a76bfdac795c9d84101eb317",
+        "size": 1234
+      }
+    ],
+    "annotations": {
+      "oci.opencontainers.image.created": "2023-01-02T03:04:05Z",
+      "com.example.data": "payload"
+    }
+ }`
+	emptyConfig = `{}`
 )
 
 type defaultProcessorTestSuite struct {
@@ -244,6 +267,19 @@ func (d *defaultProcessorTestSuite) TestAbstractMetadataWithUnknownConfig() {
 	d.Len(unknownConfig, 35)
 }
 
+func (d *defaultProcessorTestSuite) TestAbstractMetadataWithEmptyConfig() {
+	manifest, _, err := distribution.UnmarshalManifest(v1.MediaTypeImageManifest, []byte(v2ManifestWithEmptyConfig))
+	d.Require().Nil(err)
+	manifestMediaType, content, err := manifest.Payload()
+	d.Require().Nil(err)
+
+	art := &artifact.Artifact{ManifestMediaType: manifestMediaType}
+	err = d.processor.AbstractMetadata(context.TODO(), art, content)
+	d.Assert().Equal(0, len(art.ExtraAttrs))
+	d.Assert().Equal(2, len(emptyConfig))
+	d.Require().Nil(err)
+}
+
 func TestDefaultProcessorTestSuite(t *testing.T) {
 	suite.Run(t, &defaultProcessorTestSuite{})
 }

src/go.mod

@@ -21,12 +21,12 @@ require (
 	github.com/go-asn1-ber/asn1-ber v1.5.5
 	github.com/go-ldap/ldap/v3 v3.4.6
 	github.com/go-openapi/errors v0.21.0
-	github.com/go-openapi/loads v0.21.2 // indirect
+	github.com/go-openapi/loads v0.21.2
 	github.com/go-openapi/runtime v0.26.2
-	github.com/go-openapi/spec v0.20.11 // indirect
+	github.com/go-openapi/spec v0.20.11
 	github.com/go-openapi/strfmt v0.21.8
 	github.com/go-openapi/swag v0.22.7
-	github.com/go-openapi/validate v0.22.3 // indirect
+	github.com/go-openapi/validate v0.22.3
 	github.com/go-redis/redis/v8 v8.11.4
 	github.com/gocarina/gocsv v0.0.0-20210516172204-ca9e8a8ddea8
 	github.com/gocraft/work v0.5.1
@@ -45,7 +45,7 @@ require (
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 	github.com/olekukonko/tablewriter v0.0.5
 	github.com/opencontainers/go-digest v1.0.0
-	github.com/opencontainers/image-spec v1.1.0-rc2.0.20221005185240-3a7f492d3f1b
+	github.com/opencontainers/image-spec v1.1.0
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.17.0
 	github.com/robfig/cron/v3 v3.0.1

src/go.sum

@@ -496,8 +496,8 @@ github.com/onsi/gomega v1.29.0 h1:KIA/t2t5UBzoirT4H9tsML45GEbo3ouUnBHsCfD2tVg=
 github.com/onsi/gomega v1.29.0/go.mod h1:9sxs+SwGrKI0+PWe4Fxa9tFQQBG5xSsSbMXOI8PPpoQ=
 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-rc2.0.20221005185240-3a7f492d3f1b h1:YWuSjZCQAPM8UUBLkYUk1e+rZcvWHJmFb6i6rM44Xs8=
-github.com/opencontainers/image-spec v1.1.0-rc2.0.20221005185240-3a7f492d3f1b/go.mod h1:3OVijpioIKYWTqjiG0zfF6wvoJ4fAXGbjdZuI2NgsRQ=
+github.com/opencontainers/image-spec v1.1.0 h1:8SG7/vwALn54lVB/0yZ/MMwhFrPYtpEHQb2IpWsCzug=
+github.com/opencontainers/image-spec v1.1.0/go.mod h1:W4s4sFTMaBeK1BQLXbG4AdM2szdn85PY75RI83NrTrM=
 github.com/opentracing/opentracing-go v1.2.0 h1:uEJPy/1a5RIPAJ0Ov+OIO8OxWu77jEv+1B0VhjKrZUs=
 github.com/opentracing/opentracing-go v1.2.0/go.mod h1:GxEUsuufX4nBwe+T+Wl9TAgYrxe9dPLANfrWvHYVTgc=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=