image: fixed tags, catalog, push operation

app/imageoper/putman.go

@@ -95,6 +95,9 @@ func (oper *Operator) PutManifest(ctx context.Context, params *PutManifestParams
 		return res, code, err
 	}
 	inMan := &ocispec.Manifest{}
+	inMan.Subject = &ocispec.Descriptor{}
+	inMan.Subject.Platform = &ocispec.Platform{}
+
 	err = json.Unmarshal(inManData, inMan)
 	if err != nil {
 		err = fmt.Errorf("Manifest parsing error: %v", err)
@@ -107,9 +110,6 @@ func (oper *Operator) PutManifest(ctx context.Context, params *PutManifestParams
 	name := params.Name
 	reference := params.Reference
 
-	if inMan.Subject == nil {
-	}
-
 	arch := inMan.Subject.Platform.Architecture
 	os := inMan.Subject.Platform.OS
 	variant := inMan.Subject.Platform.Variant