Update deletion for index type of accessory (#20073)

update delete for index accessory

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

revert error code

update lint and comments

src/controller/artifact/controller.go

@@ -356,7 +356,16 @@ func (c *controller) deleteDeeply(ctx context.Context, id int64, isRoot, isAcces
 	for _, acc := range art.Accessories {
 		// only hard ref accessory should be removed
 		if acc.IsHard() {
-			if err = c.deleteDeeply(ctx, acc.GetData().ArtifactID, true, true); err != nil {
+			// if this acc artifact has parent(is child), set isRoot to false
+			parents, err := c.artMgr.ListReferences(ctx, &q.Query{
+				Keywords: map[string]interface{}{
+					"ChildID": acc.GetData().ArtifactID,
+				},
+			})
+			if err != nil {
+				return err
+			}
+			if err = c.deleteDeeply(ctx, acc.GetData().ArtifactID, len(parents) == 0, true); err != nil {
 				return err
 			}
 		}
@@ -369,7 +378,12 @@ func (c *controller) deleteDeeply(ctx context.Context, id int64, isRoot, isAcces
 			!errors.IsErr(err, errors.NotFoundCode) {
 			return err
 		}
-		if err = c.deleteDeeply(ctx, reference.ChildID, false, false); err != nil {
+		// if the child artifact is an accessory, set isAccessory to true
+		accs, err := c.accessoryMgr.List(ctx, q.New(q.KeyWords{"ArtifactID": reference.ChildID}))
+		if err != nil {
+			return err
+		}
+		if err = c.deleteDeeply(ctx, reference.ChildID, false, len(accs) > 0); err != nil {
 			return err
 		}
 	}

src/server/registry/manifest.go

@@ -145,6 +145,8 @@ func deleteManifest(w http.ResponseWriter, req *http.Request) {
 	// add parse digest here is to return ErrDigestInvalidFormat before GetByReference throws an NOT_FOUND(404)
 	// Do not add the logic into GetByReference as it's a shared method for PUT/GET/DELETE/Internal call,
 	// and NOT_FOUND satisfy PUT/GET/Internal call.
+	// According to https://github.com/opencontainers/distribution-spec/blob/v1.1.0/spec.md#deleting-tags
+	// If tag deletion is disabled, the registry MUST respond with either a 400 Bad Request or a 405 Method Not Allowed
 	if _, err := digest.Parse(reference); err != nil {
 		lib_http.SendError(w, errors.Wrapf(err, "unsupported digest %s", reference).WithCode(errors.UNSUPPORTED))
 		return