change ExtFields to value instead of Pointer.

internal/resource/base.go

@@ -101,8 +101,8 @@ func (*Base) NumCols(n string) map[string]bool {
 }
 
 // ExtFields returns extended fields in relation to headers.
-func (*Base) ExtFields() (*TypeMeta, error) {
-	return nil, errors.New("Base does not have extended fields.")
+func (*Base) ExtFields() (TypeMeta, error) {
+	return TypeMeta{}, errors.New("Base does not have extended fields.")
 }
 
 // Get a resource by name

internal/resource/crd.go

@@ -92,12 +92,12 @@ func (r *CustomResourceDefinition) Fields(ns string) Row {
 }
 
 // ExtFields returns extended fields.
-func (r *CustomResourceDefinition) ExtFields() (*TypeMeta, error) {
-	m := &TypeMeta{}
+func (r *CustomResourceDefinition) ExtFields() (TypeMeta, error) {
+	m := TypeMeta{}
 	i := r.instance
 	spec, ok := i.Object["spec"].(map[string]interface{})
 	if !ok {
-		return nil, errors.New("missing crd specs")
+		return m, errors.New("missing crd specs")
 	}
 
 	if meta, ok := i.Object["metadata"].(map[string]interface{}); ok {
@@ -107,7 +107,7 @@ func (r *CustomResourceDefinition) ExtFields() (*TypeMeta, error) {
 	m.Namespaced = isNamespaced(spec["scope"].(string))
 	names, ok := spec["names"].(map[string]interface{})
 	if !ok {
-		return nil, errors.New("missing crd names")
+		return m, errors.New("missing crd names")
 	}
 	m.Kind = names["kind"].(string)
 	m.Singular, m.Plural = names["singular"].(string), names["plural"].(string)

internal/resource/list.go

@@ -90,7 +90,7 @@ type (
 	Columnar interface {
 		Header(ns string) Row
 		Fields(ns string) Row
-		ExtFields() (*TypeMeta, error)
+		ExtFields() (TypeMeta, error)
 		Name() string
 		SetPodMetrics(*mv1beta1.PodMetrics)
 		SetNodeMetrics(*mv1beta1.NodeMetrics)