Merge pull request #36764 from ymqytw/make_edit_before_create_iterate

Automatic merge from submit-queue

make kubectl create --edit iterate

`kubectl create --edit` is broken after #36148 merged.
`kubectl create --edit` will fail when a manifest that contains multiple resources.
I guess the root cause is that dynamic typer doesn't support a list of resources currently.

This PR makes `kubectl create --edit` iterate again as `kubectl create`.

hack/make-rules/test-cmd.sh

@@ -728,21 +728,34 @@ runTests() {
   kubectl delete -f hack/testdata/pod.yaml "${kube_flags[@]}"
 
   ### Create valid-pod POD
-  # Pre-condition: no POD exists
-  create_and_use_new_namespace
-  kube::test::get_object_assert pods "{{range.items}}{{$id_field}}:{{end}}" ''
-  ## kubectl create --edit can update the image field of a POD. tmp-editor.sh is a fake editor
+  # Pre-condition: no services and no rcs exist
+  kube::test::get_object_assert service "{{range.items}}{{$id_field}}:{{end}}" ''
+  kube::test::get_object_assert rc "{{range.items}}{{$id_field}}:{{end}}" ''
+  ## kubectl create --edit can update the label filed of multiple resources. tmp-editor.sh is a fake editor
   TEMP=$(mktemp /tmp/tmp-editor-XXXXXXXX.sh)
-  echo -e "#!/bin/bash\n$SED -i \"s/gcr.io\/google_containers\/serve_hostname/nginx/g\" \$1" > ${TEMP}
+  echo -e "#!/bin/bash\n$SED -i \"s/mock/modified/g\" \$1" > ${TEMP}
   chmod +x ${TEMP}
   # Command
-  EDITOR=${TEMP} kubectl create --edit -f test/fixtures/doc-yaml/admin/limitrange/valid-pod.yaml "${kube_flags[@]}"
-  # Post-condition: valid-pod POD is created and has image gcr.io/google_containers/serve_hostname
-  kube::test::get_object_assert pods "{{range.items}}{{$id_field}}:{{end}}" 'valid-pod:'
-  kube::test::get_object_assert pods "{{range.items}}{{$image_field}}:{{end}}" 'nginx:'
+  EDITOR=${TEMP} kubectl create --edit -f hack/testdata/multi-resource-json.json "${kube_flags[@]}"
+  # Post-condition: service named modified and rc named modified are created
+  kube::test::get_object_assert service "{{range.items}}{{$id_field}}:{{end}}" 'modified:'
+  kube::test::get_object_assert rc "{{range.items}}{{$id_field}}:{{end}}" 'modified:'
+  # Clean up
+  kubectl delete service/modified "${kube_flags[@]}"
+  kubectl delete rc/modified "${kube_flags[@]}"
+
+  # Pre-condition: no services and no rcs exist
+  kube::test::get_object_assert service "{{range.items}}{{$id_field}}:{{end}}" ''
+  kube::test::get_object_assert rc "{{range.items}}{{$id_field}}:{{end}}" ''
+  # Command
+  EDITOR=${TEMP} kubectl create --edit -f hack/testdata/multi-resource-list.json "${kube_flags[@]}"
+  # Post-condition: service named modified and rc named modified are created
+  kube::test::get_object_assert service "{{range.items}}{{$id_field}}:{{end}}" 'modified:'
+  kube::test::get_object_assert rc "{{range.items}}{{$id_field}}:{{end}}" 'modified:'
   # Clean up
   rm ${TEMP}
-  kubectl delete pods/valid-pod "${kube_flags[@]}"
+  kubectl delete service/modified "${kube_flags[@]}"
+  kubectl delete rc/modified "${kube_flags[@]}"
 
   ## kubectl create --edit won't create anything if user makes no changes
   [ "$(EDITOR=cat kubectl create --edit -f test/fixtures/doc-yaml/admin/limitrange/valid-pod.yaml -o json 2>&1 | grep 'Edit cancelled')" ]

pkg/kubectl/cmd/edit.go

@@ -143,7 +143,7 @@ func runEdit(f cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args
 		return err
 	}
 
-	infos, err := r.Infos()
+	normalEditInfos, err := r.Infos()
 	if err != nil {
 		return err
 	}
@@ -153,6 +153,7 @@ func runEdit(f cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args
 		edit               = editor.NewDefaultEditor(f.EditorEnvs())
 	)
 
+	editFn := func(info *resource.Info, err error) error {
 		var (
 			results  = editResults{}
 			original = []byte{}
@@ -161,7 +162,16 @@ func runEdit(f cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args
 		)
 
 		containsError := false
+		var infos []*resource.Info
 		for {
+			switch editMode {
+			case NormalEditMode:
+				infos = normalEditInfos
+			case EditBeforeCreateMode:
+				infos = []*resource.Info{info}
+			default:
+				err = fmt.Errorf("Not supported edit mode %q", editMode)
+			}
 			originalObj, err := resource.AsVersionedObject(infos, false, defaultVersion, encoder)
 			if err != nil {
 				return err
@@ -318,6 +328,18 @@ func runEdit(f cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args
 				containsError = true
 			}
 		}
+	}
+
+	switch editMode {
+	// If doing normal edit we cannot use Visit because we need to edit a list for convenience. Ref: #20519
+	case NormalEditMode:
+		return editFn(nil, nil)
+	// If doing an edit before created, we don't want a list and instead want the normal behavior as kubectl create.
+	case EditBeforeCreateMode:
+		return r.Visit(editFn)
+	default:
+		return fmt.Errorf("Not supported edit mode %q", editMode)
+	}
 }
 
 func getPrinter(cmd *cobra.Command) (*editPrinterOptions, error) {