Fix CRD validation error for 'items' field

Signed-off-by: He Xiaoxi <xxhe@alauda.io>

vendor/github.com/go-openapi/loads/spec.go

@@ -16,6 +16,7 @@ package loads
 
 import (
 	"bytes"
+	"encoding/gob"
 	"encoding/json"
 	"fmt"
 	"net/url"
@@ -50,6 +51,10 @@ func init() {
 	loaders = defaultLoader
 	spec.PathLoader = loaders.Fn
 	AddLoader(swag.YAMLMatcher, swag.YAMLDoc)
+
+	gob.Register(map[string]interface{}{})
+	gob.Register([]interface{}{})
+	//gob.Register(spec.Refable{})
 }
 
 // AddLoader for a document
@@ -76,7 +81,7 @@ func JSONSpec(path string) (*Document, error) {
 		return nil, err
 	}
 	// convert to json
-	return Analyzed(json.RawMessage(data), "")
+	return Analyzed(data, "")
 }
 
 // Document represents a swagger spec document
@@ -120,9 +125,9 @@ func Spec(path string) (*Document, error) {
 				lastErr = err2
 				continue
 			}
-			doc, err := Analyzed(b, "")
-			if err != nil {
-				return nil, err
+			doc, err3 := Analyzed(b, "")
+			if err3 != nil {
+				return nil, err3
 			}
 			if doc != nil {
 				doc.specFilePath = path
@@ -176,8 +181,8 @@ func Analyzed(data json.RawMessage, version string) (*Document, error) {
 		return nil, err
 	}
 
-	origsqspec := new(spec.Swagger)
-	if err := json.Unmarshal(raw, origsqspec); err != nil {
+	origsqspec, err := cloneSpec(swspec)
+	if err != nil {
 		return nil, err
 	}
 
@@ -252,6 +257,7 @@ func (d *Document) Raw() json.RawMessage {
 	return d.raw
 }
 
+// OrigSpec yields the original spec
 func (d *Document) OrigSpec() *spec.Swagger {
 	return d.origSpec
 }
@@ -277,3 +283,16 @@ func (d *Document) Pristine() *Document {
 func (d *Document) SpecFilePath() string {
 	return d.specFilePath
 }
+
+func cloneSpec(src *spec.Swagger) (*spec.Swagger, error) {
+	var b bytes.Buffer
+	if err := gob.NewEncoder(&b).Encode(src); err != nil {
+		return nil, err
+	}
+
+	var dst spec.Swagger
+	if err := gob.NewDecoder(&b).Decode(&dst); err != nil {
+		return nil, err
+	}
+	return &dst, nil
+}