Custom resource definition

Co-authored-by: Mathieu Lonjaret <mathieu.lonjaret@gmail.com>

vendor/k8s.io/apimachinery/pkg/runtime/converter.go

@@ -73,7 +73,6 @@ var (
 	mapStringInterfaceType = reflect.TypeOf(map[string]interface{}{})
 	stringType             = reflect.TypeOf(string(""))
 	int64Type              = reflect.TypeOf(int64(0))
-	uint64Type             = reflect.TypeOf(uint64(0))
 	float64Type            = reflect.TypeOf(float64(0))
 	boolType               = reflect.TypeOf(bool(false))
 	fieldCache             = newFieldsCache()
@@ -411,8 +410,7 @@ func (c *unstructuredConverter) ToUnstructured(obj interface{}) (map[string]inte
 	var u map[string]interface{}
 	var err error
 	if unstr, ok := obj.(Unstructured); ok {
-		// UnstructuredContent() mutates the object so we need to make a copy first
-		u = unstr.DeepCopyObject().(Unstructured).UnstructuredContent()
+		u = unstr.UnstructuredContent()
 	} else {
 		t := reflect.TypeOf(obj)
 		value := reflect.ValueOf(obj)
@@ -439,22 +437,32 @@ func (c *unstructuredConverter) ToUnstructured(obj interface{}) (map[string]inte
 }
 
 // DeepCopyJSON deep copies the passed value, assuming it is a valid JSON representation i.e. only contains
-// types produced by json.Unmarshal().
+// types produced by json.Unmarshal() and also int64.
+// bool, int64, float64, string, []interface{}, map[string]interface{}, json.Number and nil
 func DeepCopyJSON(x map[string]interface{}) map[string]interface{} {
 	return DeepCopyJSONValue(x).(map[string]interface{})
 }
 
 // DeepCopyJSONValue deep copies the passed value, assuming it is a valid JSON representation i.e. only contains
-// types produced by json.Unmarshal().
+// types produced by json.Unmarshal() and also int64.
+// bool, int64, float64, string, []interface{}, map[string]interface{}, json.Number and nil
 func DeepCopyJSONValue(x interface{}) interface{} {
 	switch x := x.(type) {
 	case map[string]interface{}:
+		if x == nil {
+			// Typed nil - an interface{} that contains a type map[string]interface{} with a value of nil
+			return x
+		}
 		clone := make(map[string]interface{}, len(x))
 		for k, v := range x {
 			clone[k] = DeepCopyJSONValue(v)
 		}
 		return clone
 	case []interface{}:
+		if x == nil {
+			// Typed nil - an interface{} that contains a type []interface{} with a value of nil
+			return x
+		}
 		clone := make([]interface{}, len(x))
 		for i, v := range x {
 			clone[i] = DeepCopyJSONValue(v)
@@ -584,10 +592,14 @@ func toUnstructured(sv, dv reflect.Value) error {
 		dv.Set(reflect.ValueOf(sv.Int()))
 		return nil
 	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
-			dv.Set(reflect.New(uint64Type))
+		uVal := sv.Uint()
+		if uVal > math.MaxInt64 {
+			return fmt.Errorf("unsigned value %d does not fit into int64 (overflow)", uVal)
 		}
-		dv.Set(reflect.ValueOf(sv.Uint()))
+		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {
+			dv.Set(reflect.New(int64Type))
+		}
+		dv.Set(reflect.ValueOf(int64(uVal)))
 		return nil
 	case reflect.Float32, reflect.Float64:
 		if dt.Kind() == reflect.Interface && dv.NumMethod() == 0 {