1.fix kubectl get * --all-namespaces

namespace miss error
	2.also add a test case
	modified:   pkg/kubectl/cmd/get/get.go
	modified:   hack/make-rules/test-cmd-util.sh

hack/make-rules/test-cmd-util.sh

@@ -4474,6 +4474,20 @@ run_kubectl_all_namespace_tests() {
   # Command
   kubectl get pods --all-namespaces --namespace=default
 
+  ### Check --all-namespaces option shows namespaces
+  # Create objects in multiple namespaces
+  kubectl create "${kube_flags[@]}" namespace all-ns-test-1
+  kubectl create "${kube_flags[@]}" serviceaccount test -n all-ns-test-1
+  kubectl create "${kube_flags[@]}" namespace all-ns-test-2
+  kubectl create "${kube_flags[@]}" serviceaccount test -n all-ns-test-2
+  # Ensure listing across namespaces displays the namespace
+  output_message=$(kubectl get serviceaccounts --all-namespaces "${kube_flags[@]}")
+  kube::test::if_has_string "${output_message}" "all-ns-test-1"
+  kube::test::if_has_string "${output_message}" "all-ns-test-2"
+  # Clean up
+  kubectl delete "${kube_flags[@]}" namespace all-ns-test-1
+  kubectl delete "${kube_flags[@]}" namespace all-ns-test-2
+
   ### Clean up
   # Pre-condition: valid-pod exists
   kube::test::get_object_assert pods "{{range.items}}{{$id_field}}:{{end}}" 'valid-pod:'

pkg/kubectl/cmd/get/get.go

@@ -614,6 +614,22 @@ func (o *GetOptions) decodeIntoTable(encoder runtime.Encoder, obj runtime.Object
 		return nil, err
 	}
 
+	for i := range table.Rows {
+		row := &table.Rows[i]
+		if row.Object.Raw == nil || row.Object.Object != nil {
+			//if row already has Object.Object
+			//we don't change it
+			continue
+		}
+
+		converted, err := runtime.Decode(unstructured.UnstructuredJSONScheme, row.Object.Raw)
+		if err != nil {
+			//if error happens, we just continue
+			continue
+		}
+		row.Object.Object = converted
+	}
+
 	return table, nil
 }