Exemple #1
0
// ReadObjectsFromPath reads objects from the specified file for testing.
func ReadObjectsFromPath(path, namespace string, decoder runtime.Decoder, typer runtime.ObjectTyper) ([]runtime.Object, error) {
	data, err := ioutil.ReadFile(path)
	if err != nil {
		return nil, err
	}
	data, err = yaml.ToJSON(data)
	if err != nil {
		return nil, err
	}
	obj, err := runtime.Decode(decoder, data)
	if err != nil {
		return nil, err
	}
	if !meta.IsListType(obj) {
		if err := setNamespace(typer, obj, namespace); err != nil {
			return nil, err
		}
		return []runtime.Object{obj}, nil
	}
	list, err := meta.ExtractList(obj)
	if err != nil {
		return nil, err
	}
	errs := runtime.DecodeList(list, decoder)
	if len(errs) > 0 {
		return nil, errs[0]
	}
	for _, o := range list {
		if err := setNamespace(typer, o, namespace); err != nil {
			return nil, err
		}
	}
	return list, nil
}
func (s *CustomColumnsPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
	w := tabwriter.NewWriter(out, columnwidth, tabwidth, padding, padding_character, flags)
	headers := make([]string, len(s.Columns))
	for ix := range s.Columns {
		headers[ix] = s.Columns[ix].Header
	}
	fmt.Fprintln(w, strings.Join(headers, "\t"))
	parsers := make([]*jsonpath.JSONPath, len(s.Columns))
	for ix := range s.Columns {
		parsers[ix] = jsonpath.New(fmt.Sprintf("column%d", ix))
		if err := parsers[ix].Parse(s.Columns[ix].FieldSpec); err != nil {
			return err
		}
	}

	if meta.IsListType(obj) {
		objs, err := meta.ExtractList(obj)
		if err != nil {
			return err
		}
		for ix := range objs {
			if err := s.printOneObject(objs[ix], parsers, w); err != nil {
				return err
			}
		}
	} else {
		if err := s.printOneObject(obj, parsers, w); err != nil {
			return err
		}
	}
	return w.Flush()
}
Exemple #3
0
func (o objects) Add(obj runtime.Object) error {
	gvk, err := o.scheme.ObjectKind(obj)
	if err != nil {
		return err
	}
	kind := gvk.Kind

	switch {
	case meta.IsListType(obj):
		if kind != "List" {
			o.types[kind] = append(o.types[kind], obj)
		}

		list, err := meta.ExtractList(obj)
		if err != nil {
			return err
		}
		if errs := runtime.DecodeList(list, o.decoder); len(errs) > 0 {
			return errs[0]
		}
		for _, obj := range list {
			if err := o.Add(obj); err != nil {
				return err
			}
		}
	default:
		if status, ok := obj.(*unversioned.Status); ok && status.Details != nil {
			kind = status.Details.Kind
		}
		o.types[kind] = append(o.types[kind], obj)
	}

	return nil
}
// setListSelfLink sets the self link of a list to the base URL, then sets the self links
// on all child objects returned.
func setListSelfLink(obj runtime.Object, req *restful.Request, namer ScopeNamer) error {
	if !meta.IsListType(obj) {
		return nil
	}

	// TODO: List SelfLink generation should return a full URL?
	path, query, err := namer.GenerateListLink(req)
	if err != nil {
		return err
	}
	newURL := *req.Request.URL
	newURL.Path = path
	newURL.RawQuery = query
	// use the path that got us here
	newURL.Fragment = ""
	if err := namer.SetSelfLink(obj, newURL.String()); err != nil {
		glog.V(4).Infof("Unable to set self link on object: %v", err)
	}

	// Set self-link of objects in the list.
	items, err := meta.ExtractList(obj)
	if err != nil {
		return err
	}
	for i := range items {
		if err := setSelfLink(items[i], req, namer); err != nil {
			return err
		}
	}
	return meta.SetList(obj, items)

}
func (s *SortingPrinter) PrintObj(obj runtime.Object, out io.Writer) error {
	if !meta.IsListType(obj) {
		return s.Delegate.PrintObj(obj, out)
	}

	if err := s.sortObj(obj); err != nil {
		return err
	}
	return s.Delegate.PrintObj(obj, out)
}
Exemple #6
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func (t *tracker) Add(obj runtime.Object) error {
	if meta.IsListType(obj) {
		return t.addList(obj, false)
	}

	objMeta, err := meta.Accessor(obj)
	if err != nil {
		return err
	}
	return t.add(obj, objMeta.GetNamespace(), false)
}
Exemple #7
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func TestIsList(t *testing.T) {
	tests := []struct {
		obj    runtime.Object
		isList bool
	}{
		{&api.PodList{}, true},
		{&api.Pod{}, false},
	}
	for _, item := range tests {
		if e, a := item.isList, meta.IsListType(item.obj); e != a {
			t.Errorf("%v: Expected %v, got %v", reflect.TypeOf(item.obj), e, a)
		}
	}
}
Exemple #8
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// RetrieveLatest updates the Object on each Info by invoking a standard client
// Get.
func RetrieveLatest(info *Info, err error) error {
	if err != nil {
		return err
	}
	if meta.IsListType(info.Object) {
		return fmt.Errorf("watch is only supported on individual resources and resource collections, but a list of resources is found")
	}
	if len(info.Name) == 0 {
		return nil
	}
	if info.Namespaced() && len(info.Namespace) == 0 {
		return fmt.Errorf("no namespace set on resource %s %q", info.Mapping.Resource, info.Name)
	}
	return info.Get()
}
// setListSelfLink sets the self link of a list to the base URL, then sets the self links
// on all child objects returned. Returns the number of items in the list.
func setListSelfLink(obj runtime.Object, req *restful.Request, namer ScopeNamer) (int, error) {
	if !meta.IsListType(obj) {
		return 0, nil
	}

	uri, err := namer.GenerateListLink(req)
	if err != nil {
		return 0, err
	}
	if err := namer.SetSelfLink(obj, uri); err != nil {
		glog.V(4).Infof("Unable to set self link on object: %v", err)
	}

	count := 0
	err = meta.EachListItem(obj, func(obj runtime.Object) error {
		count++
		return setSelfLink(obj, req, namer)
	})
	return count, err
}
Exemple #10
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// RetrieveLatest updates the Object on each Info by invoking a standard client
// Get.
func RetrieveLatest(info *Info, err error) error {
	if err != nil {
		return err
	}
	if meta.IsListType(info.Object) {
		return fmt.Errorf("watch is only supported on individual resources and resource collections, but a list of resources is found")
	}
	if len(info.Name) == 0 {
		return nil
	}
	if info.Namespaced() && len(info.Namespace) == 0 {
		return fmt.Errorf("no namespace set on resource %s %q", info.Mapping.Resource, info.Name)
	}
	obj, err := NewHelper(info.Client, info.Mapping).Get(info.Namespace, info.Name, info.Export)
	if err != nil {
		return err
	}
	info.Object = obj
	info.ResourceVersion, _ = info.Mapping.MetadataAccessor.ResourceVersion(obj)
	return nil
}
Exemple #11
0
// Object returns a single object representing the output of a single visit to all
// found resources.  If the Builder was a singular context (expected to return a
// single resource by user input) and only a single resource was found, the resource
// will be returned as is.  Otherwise, the returned resources will be part of an
// api.List. The ResourceVersion of the api.List will be set only if it is identical
// across all infos returned.
func (r *Result) Object() (runtime.Object, error) {
	infos, err := r.Infos()
	if err != nil {
		return nil, err
	}

	versions := sets.String{}
	objects := []runtime.Object{}
	for _, info := range infos {
		if info.Object != nil {
			objects = append(objects, info.Object)
			versions.Insert(info.ResourceVersion)
		}
	}

	if len(objects) == 1 {
		if r.singular {
			return objects[0], nil
		}
		// if the item is a list already, don't create another list
		if meta.IsListType(objects[0]) {
			return objects[0], nil
		}
	}

	version := ""
	if len(versions) == 1 {
		version = versions.List()[0]
	}
	return &api.List{
		ListMeta: metav1.ListMeta{
			ResourceVersion: version,
		},
		Items: objects,
	}, err
}
Exemple #12
0
// RunConvert implements the generic Convert command
func (o *ConvertOptions) RunConvert() error {
	r := o.builder.Do()
	err := r.Err()
	if err != nil {
		return err
	}

	singular := false
	infos, err := r.IntoSingular(&singular).Infos()
	if err != nil {
		return err
	}

	if len(infos) == 0 {
		return fmt.Errorf("no objects passed to convert")
	}

	objects, err := resource.AsVersionedObject(infos, !singular, o.outputVersion, o.encoder)
	if err != nil {
		return err
	}

	if meta.IsListType(objects) {
		_, items, err := cmdutil.FilterResourceList(objects, nil, nil)
		if err != nil {
			return err
		}
		filteredObj, err := cmdutil.ObjectListToVersionedObject(items, o.outputVersion)
		if err != nil {
			return err
		}
		return o.printer.PrintObj(filteredObj, o.out)
	}

	return o.printer.PrintObj(objects, o.out)
}
Exemple #13
0
func (t *tracker) List(gvk schema.GroupVersionKind, ns string) (runtime.Object, error) {
	// Heuristic for list kind: original kind + List suffix. Might
	// not always be true but this tracker has a pretty limited
	// understanding of the actual API model.
	listGVK := gvk
	listGVK.Kind = listGVK.Kind + "List"

	list, err := t.scheme.New(listGVK)
	if err != nil {
		return nil, err
	}

	if !meta.IsListType(list) {
		return nil, fmt.Errorf("%q is not a list type", listGVK.Kind)
	}

	t.lock.RLock()
	defer t.lock.RUnlock()

	objs, ok := t.objects[gvk]
	if !ok {
		return list, nil
	}

	matchingObjs, err := filterByNamespaceAndName(objs, ns, "")
	if err != nil {
		return nil, err
	}
	if err := meta.SetList(list, matchingObjs); err != nil {
		return nil, err
	}
	if list, err = t.scheme.Copy(list); err != nil {
		return nil, err
	}
	return list, nil
}
Exemple #14
0
func runEdit(f cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args []string, options *resource.FilenameOptions, editMode EditMode) error {
	o, err := getPrinter(cmd)
	if err != nil {
		return err
	}

	mapper, resourceMapper, r, cmdNamespace, err := getMapperAndResult(f, args, options, editMode)
	if err != nil {
		return err
	}

	clientConfig, err := f.ClientConfig()
	if err != nil {
		return err
	}

	encoder := f.JSONEncoder()
	defaultVersion, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
	if err != nil {
		return err
	}

	infos, err := r.Infos()
	if err != nil {
		return err
	}

	var (
		windowsLineEndings = cmdutil.GetFlagBool(cmd, "windows-line-endings")
		edit               = editor.NewDefaultEditor(f.EditorEnvs())
	)

	var (
		results  = editResults{}
		original = []byte{}
		edited   = []byte{}
		file     string
	)

	containsError := false
	for {
		originalObj, err := resource.AsVersionedObject(infos, false, defaultVersion, encoder)
		if err != nil {
			return err
		}

		objToEdit := originalObj

		// generate the file to edit
		buf := &bytes.Buffer{}
		var w io.Writer = buf
		if windowsLineEndings {
			w = crlf.NewCRLFWriter(w)
		}

		if o.addHeader {
			results.header.writeTo(w)
		}

		if !containsError {
			if err := o.printer.PrintObj(objToEdit, w); err != nil {
				return preservedFile(err, results.file, errOut)
			}
			original = buf.Bytes()
		} else {
			// In case of an error, preserve the edited file.
			// Remove the comments (header) from it since we already
			// have included the latest header in the buffer above.
			buf.Write(manualStrip(edited))
		}

		// launch the editor
		editedDiff := edited
		edited, file, err = edit.LaunchTempFile(fmt.Sprintf("%s-edit-", filepath.Base(os.Args[0])), o.ext, buf)
		if err != nil {
			return preservedFile(err, results.file, errOut)
		}
		if editMode == NormalEditMode || containsError {
			if bytes.Equal(stripComments(editedDiff), stripComments(edited)) {
				// Ugly hack right here. We will hit this either (1) when we try to
				// save the same changes we tried to save in the previous iteration
				// which means our changes are invalid or (2) when we exit the second
				// time. The second case is more usual so we can probably live with it.
				// TODO: A less hacky fix would be welcome :)
				return preservedFile(fmt.Errorf("%s", "Edit cancelled, no valid changes were saved."), file, errOut)
			}
		}

		// cleanup any file from the previous pass
		if len(results.file) > 0 {
			os.Remove(results.file)
		}
		glog.V(4).Infof("User edited:\n%s", string(edited))

		// Apply validation
		schema, err := f.Validator(cmdutil.GetFlagBool(cmd, "validate"), cmdutil.GetFlagString(cmd, "schema-cache-dir"))
		if err != nil {
			return preservedFile(err, file, errOut)
		}
		err = schema.ValidateBytes(stripComments(edited))
		if err != nil {
			results = editResults{
				file: file,
			}
			containsError = true
			fmt.Fprintln(out, results.addError(errors.NewInvalid(api.Kind(""), "", field.ErrorList{field.Invalid(nil, "The edited file failed validation", fmt.Sprintf("%v", err))}), infos[0]))
			continue
		}

		// Compare content without comments
		if bytes.Equal(stripComments(original), stripComments(edited)) {
			os.Remove(file)
			fmt.Fprintln(errOut, "Edit cancelled, no changes made.")
			return nil
		}

		lines, err := hasLines(bytes.NewBuffer(edited))
		if err != nil {
			return preservedFile(err, file, errOut)
		}
		if !lines {
			os.Remove(file)
			fmt.Fprintln(errOut, "Edit cancelled, saved file was empty.")
			return nil
		}

		results = editResults{
			file: file,
		}

		// parse the edited file
		updates, err := resourceMapper.InfoForData(edited, "edited-file")
		if err != nil {
			// syntax error
			containsError = true
			results.header.reasons = append(results.header.reasons, editReason{head: fmt.Sprintf("The edited file had a syntax error: %v", err)})
			continue
		}
		// not a syntax error as it turns out...
		containsError = false

		namespaceVisitor := resource.NewFlattenListVisitor(updates, resourceMapper)
		// need to make sure the original namespace wasn't changed while editing
		if err = namespaceVisitor.Visit(resource.RequireNamespace(cmdNamespace)); err != nil {
			return preservedFile(err, file, errOut)
		}

		// iterate through all items to apply annotations
		mutatedObjects, err := visitAnnotation(cmd, f, updates, resourceMapper, encoder)
		if err != nil {
			return preservedFile(err, file, errOut)
		}

		// if we mutated a list in the visitor, persist the changes on the overall object
		if meta.IsListType(updates.Object) {
			meta.SetList(updates.Object, mutatedObjects)
		}

		switch editMode {
		case NormalEditMode:
			err = visitToPatch(originalObj, updates, mapper, resourceMapper, encoder, out, errOut, defaultVersion, &results, file)
		case EditBeforeCreateMode:
			err = visitToCreate(updates, mapper, resourceMapper, out, errOut, defaultVersion, &results, file)
		default:
			err = fmt.Errorf("Not supported edit mode %q", editMode)
		}
		if err != nil {
			return preservedFile(err, results.file, errOut)
		}

		// Handle all possible errors
		//
		// 1. retryable: propose kubectl replace -f
		// 2. notfound: indicate the location of the saved configuration of the deleted resource
		// 3. invalid: retry those on the spot by looping ie. reloading the editor
		if results.retryable > 0 {
			fmt.Fprintf(errOut, "You can run `%s replace -f %s` to try this update again.\n", filepath.Base(os.Args[0]), file)
			return cmdutil.ErrExit
		}
		if results.notfound > 0 {
			fmt.Fprintf(errOut, "The edits you made on deleted resources have been saved to %q\n", file)
			return cmdutil.ErrExit
		}

		if len(results.edit) == 0 {
			if results.notfound == 0 {
				os.Remove(file)
			} else {
				fmt.Fprintf(out, "The edits you made on deleted resources have been saved to %q\n", file)
			}
			return nil
		}

		if len(results.header.reasons) > 0 {
			containsError = true
		}
	}
}
Exemple #15
0
func (t *tracker) add(obj runtime.Object, replaceExisting bool) error {
	if meta.IsListType(obj) {
		return t.addList(obj, replaceExisting)
	}

	gvks, _, err := t.scheme.ObjectKinds(obj)
	if err != nil {
		return err
	}
	if len(gvks) == 0 {
		return fmt.Errorf("no registered kinds for %v", obj)
	}

	t.lock.Lock()
	defer t.lock.Unlock()

	for _, gvk := range gvks {
		gr := unversioned.GroupResource{Group: gvk.Group, Resource: gvk.Kind}

		// To avoid the object from being accidentally modified by caller
		// after it's been added to the tracker, we always store the deep
		// copy.
		obj, err = t.scheme.Copy(obj)
		if err != nil {
			return err
		}

		if status, ok := obj.(*unversioned.Status); ok && status.Details != nil {
			gvk.Kind = status.Details.Kind
		}

		newMeta, err := meta.Accessor(obj)
		if err != nil {
			return err
		}

		if err := checkNamespace(gvk, newMeta.GetNamespace()); err != nil {
			return err
		}

		for i, existingObj := range t.objects[gvk] {
			oldMeta, err := meta.Accessor(existingObj)
			if err != nil {
				return err
			}
			if oldMeta.GetNamespace() == newMeta.GetNamespace() && oldMeta.GetName() == newMeta.GetName() {
				if replaceExisting {
					t.objects[gvk][i] = obj
					return nil
				}
				return errors.NewAlreadyExists(gr, newMeta.GetName())
			}
		}

		if replaceExisting {
			// Tried to update but no matching object was found.
			return errors.NewNotFound(gr, newMeta.GetName())
		}

		t.objects[gvk] = append(t.objects[gvk], obj)
	}

	return nil
}
Exemple #16
0
// RunGet implements the generic Get command
// TODO: convert all direct flag accessors to a struct and pass that instead of cmd
func RunGet(f *cmdutil.Factory, out io.Writer, errOut io.Writer, cmd *cobra.Command, args []string, options *GetOptions) error {
	if len(options.Raw) > 0 {
		restClient, err := f.RESTClient()
		if err != nil {
			return err
		}

		stream, err := restClient.Get().RequestURI(options.Raw).Stream()
		if err != nil {
			return err
		}
		defer stream.Close()

		for {
			buffer := make([]byte, 1024, 1024)
			bytesRead, err := stream.Read(buffer)
			if bytesRead > 0 {
				fmt.Printf("%s", string(buffer[:bytesRead]))
			}
			if err == io.EOF {
				return nil
			}
			if err != nil {
				return err
			}
		}
	}

	selector := cmdutil.GetFlagString(cmd, "selector")
	allNamespaces := cmdutil.GetFlagBool(cmd, "all-namespaces")
	showKind := cmdutil.GetFlagBool(cmd, "show-kind")
	mapper, typer := f.Object()
	printAll := false

	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
	if err != nil {
		return err
	}

	if allNamespaces {
		enforceNamespace = false
	}

	if len(args) == 0 && cmdutil.IsFilenameEmpty(options.Filenames) {
		fmt.Fprint(errOut, "You must specify the type of resource to get. ", valid_resources)
		return cmdutil.UsageError(cmd, "Required resource not specified.")
	}

	// determine if args contains "all"
	for _, a := range args {
		if a == "all" {
			printAll = true
			break
		}
	}

	// always show resources when getting by name or filename
	argsHasNames, err := resource.HasNames(args)
	if err != nil {
		return err
	}
	if len(options.Filenames) > 0 || argsHasNames {
		cmd.Flag("show-all").Value.Set("true")
	}
	export := cmdutil.GetFlagBool(cmd, "export")

	// handle watch separately since we cannot watch multiple resource types
	isWatch, isWatchOnly := cmdutil.GetFlagBool(cmd, "watch"), cmdutil.GetFlagBool(cmd, "watch-only")
	if isWatch || isWatchOnly {
		r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
			NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
			FilenameParam(enforceNamespace, &options.FilenameOptions).
			SelectorParam(selector).
			ExportParam(export).
			ResourceTypeOrNameArgs(true, args...).
			SingleResourceType().
			Latest().
			Do()
		err := r.Err()
		if err != nil {
			return err
		}
		infos, err := r.Infos()
		if err != nil {
			return err
		}
		if len(infos) != 1 {
			return fmt.Errorf("watch is only supported on individual resources and resource collections - %d resources were found", len(infos))
		}
		info := infos[0]
		mapping := info.ResourceMapping()
		printer, err := f.PrinterForMapping(cmd, mapping, allNamespaces)
		if err != nil {
			return err
		}
		obj, err := r.Object()
		if err != nil {
			return err
		}

		// watching from resourceVersion 0, starts the watch at ~now and
		// will return an initial watch event.  Starting form ~now, rather
		// the rv of the object will insure that we start the watch from
		// inside the watch window, which the rv of the object might not be.
		rv := "0"
		isList := meta.IsListType(obj)
		if isList {
			// the resourceVersion of list objects is ~now but won't return
			// an initial watch event
			rv, err = mapping.MetadataAccessor.ResourceVersion(obj)
			if err != nil {
				return err
			}
		}

		// print the current object
		if !isWatchOnly {
			if err := printer.PrintObj(obj, out); err != nil {
				return fmt.Errorf("unable to output the provided object: %v", err)
			}
			printer.AfterPrint(errOut, mapping.Resource)
		}

		// print watched changes
		w, err := r.Watch(rv)
		if err != nil {
			return err
		}

		first := true
		kubectl.WatchLoop(w, func(e watch.Event) error {
			if !isList && first {
				// drop the initial watch event in the single resource case
				first = false
				return nil
			}
			err := printer.PrintObj(e.Object, out)
			if err == nil {
				printer.AfterPrint(errOut, mapping.Resource)
			}
			return err
		})
		return nil
	}

	r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
		NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
		FilenameParam(enforceNamespace, &options.FilenameOptions).
		SelectorParam(selector).
		ExportParam(export).
		ResourceTypeOrNameArgs(true, args...).
		ContinueOnError().
		Latest().
		Flatten().
		Do()
	err = r.Err()
	if err != nil {
		return err
	}

	printer, generic, err := cmdutil.PrinterForCommand(cmd)
	if err != nil {
		return err
	}

	if generic {
		clientConfig, err := f.ClientConfig()
		if err != nil {
			return err
		}

		allErrs := []error{}
		singular := false
		infos, err := r.IntoSingular(&singular).Infos()
		if err != nil {
			if singular {
				return err
			}
			allErrs = append(allErrs, err)
		}

		// the outermost object will be converted to the output-version, but inner
		// objects can use their mappings
		version, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
		if err != nil {
			return err
		}
		res := ""
		if len(infos) > 0 {
			res = infos[0].ResourceMapping().Resource
		}

		obj, err := resource.AsVersionedObject(infos, !singular, version, f.JSONEncoder())
		if err != nil {
			return err
		}

		if err := printer.PrintObj(obj, out); err != nil {
			allErrs = append(allErrs, err)
		}
		printer.AfterPrint(errOut, res)
		return utilerrors.NewAggregate(allErrs)
	}

	allErrs := []error{}
	infos, err := r.Infos()
	if err != nil {
		allErrs = append(allErrs, err)
	}

	objs := make([]runtime.Object, len(infos))
	for ix := range infos {
		objs[ix] = infos[ix].Object
	}

	sorting, err := cmd.Flags().GetString("sort-by")
	if err != nil {
		return err
	}
	var sorter *kubectl.RuntimeSort
	if len(sorting) > 0 && len(objs) > 1 {
		clientConfig, err := f.ClientConfig()
		if err != nil {
			return err
		}

		version, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
		if err != nil {
			return err
		}

		for ix := range infos {
			objs[ix], err = infos[ix].Mapping.ConvertToVersion(infos[ix].Object, version)
			if err != nil {
				allErrs = append(allErrs, err)
				continue
			}
		}

		// TODO: questionable
		if sorter, err = kubectl.SortObjects(f.Decoder(true), objs, sorting); err != nil {
			return err
		}
	}

	// use the default printer for each object
	printer = nil
	var lastMapping *meta.RESTMapping
	w := kubectl.GetNewTabWriter(out)

	if mustPrintWithKinds(objs, infos, sorter, printAll) {
		showKind = true
	}

	for ix := range objs {
		var mapping *meta.RESTMapping
		var original runtime.Object
		if sorter != nil {
			mapping = infos[sorter.OriginalPosition(ix)].Mapping
			original = infos[sorter.OriginalPosition(ix)].Object
		} else {
			mapping = infos[ix].Mapping
			original = infos[ix].Object
		}
		if printer == nil || lastMapping == nil || mapping == nil || mapping.Resource != lastMapping.Resource {
			if printer != nil {
				w.Flush()
				printer.AfterPrint(errOut, lastMapping.Resource)
			}
			printer, err = f.PrinterForMapping(cmd, mapping, allNamespaces)
			if err != nil {
				allErrs = append(allErrs, err)
				continue
			}
			lastMapping = mapping
		}
		if resourcePrinter, found := printer.(*kubectl.HumanReadablePrinter); found {
			resourceName := resourcePrinter.GetResourceKind()
			if mapping != nil {
				if resourceName == "" {
					resourceName = mapping.Resource
				}
				if alias, ok := kubectl.ResourceShortFormFor(mapping.Resource); ok {
					resourceName = alias
				} else if resourceName == "" {
					resourceName = "none"
				}
			} else {
				resourceName = "none"
			}

			if showKind {
				resourcePrinter.EnsurePrintWithKind(resourceName)
			}

			if err := printer.PrintObj(original, w); err != nil {
				allErrs = append(allErrs, err)
			}
			continue
		}
		if err := printer.PrintObj(original, w); err != nil {
			allErrs = append(allErrs, err)
			continue
		}
	}
	w.Flush()
	if printer != nil {
		printer.AfterPrint(errOut, lastMapping.Resource)
	}
	return utilerrors.NewAggregate(allErrs)
}
Exemple #17
0
func RunEdit(f *cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args []string, options *EditOptions) error {
	var printer kubectl.ResourcePrinter
	var ext string
	switch format := cmdutil.GetFlagString(cmd, "output"); format {
	case "json":
		printer = &kubectl.JSONPrinter{}
		ext = ".json"
	case "yaml":
		printer = &kubectl.YAMLPrinter{}
		ext = ".yaml"
	default:
		return cmdutil.UsageError(cmd, "The flag 'output' must be one of yaml|json")
	}

	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
	if err != nil {
		return err
	}

	mapper, typer := f.Object(cmdutil.GetIncludeThirdPartyAPIs(cmd))
	resourceMapper := &resource.Mapper{
		ObjectTyper:  typer,
		RESTMapper:   mapper,
		ClientMapper: resource.ClientMapperFunc(f.ClientForMapping),

		// NB: we use `f.Decoder(false)` to get a plain deserializer for
		// the resourceMapper, since it's used to read in edits and
		// we don't want to convert into the internal version when
		// reading in edits (this would cause us to potentially try to
		// compare two different GroupVersions).
		Decoder: f.Decoder(false),
	}

	r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
		NamespaceParam(cmdNamespace).DefaultNamespace().
		FilenameParam(enforceNamespace, options.Recursive, options.Filenames...).
		ResourceTypeOrNameArgs(true, args...).
		Flatten().
		Latest().
		Do()
	err = r.Err()
	if err != nil {
		return err
	}

	infos, err := r.Infos()
	if err != nil {
		return err
	}

	clientConfig, err := f.ClientConfig()
	if err != nil {
		return err
	}

	encoder := f.JSONEncoder()
	defaultVersion, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
	if err != nil {
		return err
	}
	originalObj, err := resource.AsVersionedObject(infos, false, defaultVersion, encoder)
	if err != nil {
		return err
	}

	var (
		windowsLineEndings = cmdutil.GetFlagBool(cmd, "windows-line-endings")
		edit               = editor.NewDefaultEditor(f.EditorEnvs())
		results            = editResults{}
		original           = []byte{}
		edited             = []byte{}
		file               string
	)

	containsError := false

	for {
		// infos mutates over time to be the list of things we've tried and failed to edit
		// this means that our overall list changes over time.
		objToEdit, err := resource.AsVersionedObject(infos, false, defaultVersion, encoder)
		if err != nil {
			return err
		}

		// generate the file to edit
		buf := &bytes.Buffer{}
		var w io.Writer = buf
		if windowsLineEndings {
			w = crlf.NewCRLFWriter(w)
		}
		if err := results.header.writeTo(w); err != nil {
			return preservedFile(err, results.file, errOut)
		}
		if !containsError {
			if err := printer.PrintObj(objToEdit, w); err != nil {
				return preservedFile(err, results.file, errOut)
			}
			original = buf.Bytes()
		} else {
			// In case of an error, preserve the edited file.
			// Remove the comments (header) from it since we already
			// have included the latest header in the buffer above.
			buf.Write(manualStrip(edited))
		}

		// launch the editor
		editedDiff := edited
		edited, file, err = edit.LaunchTempFile(fmt.Sprintf("%s-edit-", filepath.Base(os.Args[0])), ext, buf)
		if err != nil {
			return preservedFile(err, results.file, errOut)
		}
		if bytes.Equal(stripComments(editedDiff), stripComments(edited)) {
			// Ugly hack right here. We will hit this either (1) when we try to
			// save the same changes we tried to save in the previous iteration
			// which means our changes are invalid or (2) when we exit the second
			// time. The second case is more usual so we can probably live with it.
			// TODO: A less hacky fix would be welcome :)
			fmt.Fprintln(errOut, "Edit cancelled, no valid changes were saved.")
			return nil
		}

		// cleanup any file from the previous pass
		if len(results.file) > 0 {
			os.Remove(results.file)
		}
		glog.V(4).Infof("User edited:\n%s", string(edited))

		// Compare content without comments
		if bytes.Equal(stripComments(original), stripComments(edited)) {
			os.Remove(file)
			fmt.Fprintln(errOut, "Edit cancelled, no changes made.")
			return nil
		}
		lines, err := hasLines(bytes.NewBuffer(edited))
		if err != nil {
			return preservedFile(err, file, errOut)
		}
		if !lines {
			os.Remove(file)
			fmt.Fprintln(errOut, "Edit cancelled, saved file was empty.")
			return nil
		}

		results = editResults{
			file: file,
		}

		// parse the edited file
		updates, err := resourceMapper.InfoForData(edited, "edited-file")
		if err != nil {
			// syntax error
			containsError = true
			results.header.reasons = append(results.header.reasons, editReason{head: fmt.Sprintf("The edited file had a syntax error: %v", err)})
			continue
		}
		// not a syntax error as it turns out...
		containsError = false

		namespaceVisitor := resource.NewFlattenListVisitor(updates, resourceMapper)
		// need to make sure the original namespace wasn't changed while editing
		if err = namespaceVisitor.Visit(resource.RequireNamespace(cmdNamespace)); err != nil {
			return preservedFile(err, file, errOut)
		}

		mutatedObjects := []runtime.Object{}
		annotationVisitor := resource.NewFlattenListVisitor(updates, resourceMapper)
		// iterate through all items to apply annotations
		if err = annotationVisitor.Visit(func(info *resource.Info, incomingErr error) error {
			// put configuration annotation in "updates"
			if err := kubectl.CreateOrUpdateAnnotation(cmdutil.GetFlagBool(cmd, cmdutil.ApplyAnnotationsFlag), info, encoder); err != nil {
				return err
			}
			if cmdutil.ShouldRecord(cmd, info) {
				if err := cmdutil.RecordChangeCause(info.Object, f.Command()); err != nil {
					return err
				}
			}
			mutatedObjects = append(mutatedObjects, info.Object)

			return nil

		}); err != nil {
			return preservedFile(err, file, errOut)
		}

		// if we mutated a list in the visitor, persist the changes on the overall object
		if meta.IsListType(updates.Object) {
			meta.SetList(updates.Object, mutatedObjects)
		}

		patchVisitor := resource.NewFlattenListVisitor(updates, resourceMapper)
		err = patchVisitor.Visit(func(info *resource.Info, incomingErr error) error {
			currOriginalObj := originalObj

			// if we're editing a list, then navigate the list to find the item that we're currently trying to edit
			if meta.IsListType(originalObj) {
				currOriginalObj = nil
				editObjUID, err := meta.NewAccessor().UID(info.Object)
				if err != nil {
					return err
				}

				listItems, err := meta.ExtractList(originalObj)
				if err != nil {
					return err
				}

				// iterate through the list to find the item with the matching UID
				for i := range listItems {
					originalObjUID, err := meta.NewAccessor().UID(listItems[i])
					if err != nil {
						return err
					}
					if editObjUID == originalObjUID {
						currOriginalObj = listItems[i]
						break
					}
				}
				if currOriginalObj == nil {
					return fmt.Errorf("no original object found for %#v", info.Object)
				}

			}

			originalSerialization, err := runtime.Encode(encoder, currOriginalObj)
			if err != nil {
				return err
			}
			editedSerialization, err := runtime.Encode(encoder, info.Object)
			if err != nil {
				return err
			}

			// compute the patch on a per-item basis
			// use strategic merge to create a patch
			originalJS, err := yaml.ToJSON(originalSerialization)
			if err != nil {
				return err
			}
			editedJS, err := yaml.ToJSON(editedSerialization)
			if err != nil {
				return err
			}

			if reflect.DeepEqual(originalJS, editedJS) {
				// no edit, so just skip it.
				cmdutil.PrintSuccess(mapper, false, out, info.Mapping.Resource, info.Name, "skipped")
				return nil
			}

			patch, err := strategicpatch.CreateStrategicMergePatch(originalJS, editedJS, currOriginalObj)
			// TODO: change all jsonmerge to strategicpatch
			// for checking preconditions
			preconditions := []jsonmerge.PreconditionFunc{}
			if err != nil {
				glog.V(4).Infof("Unable to calculate diff, no merge is possible: %v", err)
				return err
			} else {
				preconditions = append(preconditions, jsonmerge.RequireKeyUnchanged("apiVersion"))
				preconditions = append(preconditions, jsonmerge.RequireKeyUnchanged("kind"))
				preconditions = append(preconditions, jsonmerge.RequireMetadataKeyUnchanged("name"))
				results.version = defaultVersion
			}

			if hold, msg := jsonmerge.TestPreconditionsHold(patch, preconditions); !hold {
				fmt.Fprintf(errOut, "error: %s", msg)
				return preservedFile(nil, file, errOut)
			}

			patched, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch)
			if err != nil {
				fmt.Fprintln(out, results.addError(err, info))
				return nil
			}
			info.Refresh(patched, true)
			cmdutil.PrintSuccess(mapper, false, out, info.Mapping.Resource, info.Name, "edited")
			return nil
		})
		if err != nil {
			return preservedFile(err, results.file, errOut)
		}

		// Handle all possible errors
		//
		// 1. retryable: propose kubectl replace -f
		// 2. notfound: indicate the location of the saved configuration of the deleted resource
		// 3. invalid: retry those on the spot by looping ie. reloading the editor
		if results.retryable > 0 {
			fmt.Fprintf(errOut, "You can run `%s replace -f %s` to try this update again.\n", filepath.Base(os.Args[0]), file)
			return errExit
		}
		if results.notfound > 0 {
			fmt.Fprintf(errOut, "The edits you made on deleted resources have been saved to %q\n", file)
			return errExit
		}

		if len(results.edit) == 0 {
			if results.notfound == 0 {
				os.Remove(file)
			} else {
				fmt.Fprintf(out, "The edits you made on deleted resources have been saved to %q\n", file)
			}
			return nil
		}

		// loop again and edit the remaining items
		infos = results.edit
	}
}
Exemple #18
0
// RunGet implements the generic Get command
// TODO: convert all direct flag accessors to a struct and pass that instead of cmd
func RunGet(f cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args []string, options *GetOptions) error {
	if len(options.Raw) > 0 {
		restClient, err := f.RESTClient()
		if err != nil {
			return err
		}

		stream, err := restClient.Get().RequestURI(options.Raw).Stream()
		if err != nil {
			return err
		}
		defer stream.Close()

		_, err = io.Copy(out, stream)
		if err != nil && err != io.EOF {
			return err
		}
		return nil
	}

	selector := cmdutil.GetFlagString(cmd, "selector")
	allNamespaces := cmdutil.GetFlagBool(cmd, "all-namespaces")
	showKind := cmdutil.GetFlagBool(cmd, "show-kind")
	mapper, typer, err := f.UnstructuredObject()
	if err != nil {
		return err
	}
	filterFuncs := f.DefaultResourceFilterFunc()
	filterOpts := f.DefaultResourceFilterOptions(cmd, allNamespaces)

	cmdNamespace, enforceNamespace, err := f.DefaultNamespace()
	if err != nil {
		return err
	}

	if allNamespaces {
		enforceNamespace = false
	}

	if len(args) == 0 && cmdutil.IsFilenameEmpty(options.Filenames) {
		fmt.Fprint(errOut, "You must specify the type of resource to get. ", valid_resources)

		fullCmdName := cmd.Parent().CommandPath()
		usageString := "Required resource not specified."
		if len(fullCmdName) > 0 && cmdutil.IsSiblingCommandExists(cmd, "explain") {
			usageString = fmt.Sprintf("%s\nUse \"%s explain <resource>\" for a detailed description of that resource (e.g. %[2]s explain pods).", usageString, fullCmdName)
		}

		return cmdutil.UsageError(cmd, usageString)
	}

	// always show resources when getting by name or filename
	argsHasNames, err := resource.HasNames(args)
	if err != nil {
		return err
	}
	if len(options.Filenames) > 0 || argsHasNames {
		cmd.Flag("show-all").Value.Set("true")
	}
	export := cmdutil.GetFlagBool(cmd, "export")

	// handle watch separately since we cannot watch multiple resource types
	isWatch, isWatchOnly := cmdutil.GetFlagBool(cmd, "watch"), cmdutil.GetFlagBool(cmd, "watch-only")
	if isWatch || isWatchOnly {
		r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.UnstructuredClientForMapping), runtime.UnstructuredJSONScheme).
			NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
			FilenameParam(enforceNamespace, &options.FilenameOptions).
			SelectorParam(selector).
			ExportParam(export).
			ResourceTypeOrNameArgs(true, args...).
			SingleResourceType().
			Latest().
			Do()
		err := r.Err()
		if err != nil {
			return err
		}
		infos, err := r.Infos()
		if err != nil {
			return err
		}
		if len(infos) != 1 {
			return fmt.Errorf("watch is only supported on individual resources and resource collections - %d resources were found", len(infos))
		}
		info := infos[0]
		mapping := info.ResourceMapping()
		printer, err := f.PrinterForMapping(cmd, mapping, allNamespaces)
		if err != nil {
			return err
		}
		obj, err := r.Object()
		if err != nil {
			return err
		}

		// watching from resourceVersion 0, starts the watch at ~now and
		// will return an initial watch event.  Starting form ~now, rather
		// the rv of the object will insure that we start the watch from
		// inside the watch window, which the rv of the object might not be.
		rv := "0"
		isList := meta.IsListType(obj)
		if isList {
			// the resourceVersion of list objects is ~now but won't return
			// an initial watch event
			rv, err = mapping.MetadataAccessor.ResourceVersion(obj)
			if err != nil {
				return err
			}
		}

		// print the current object
		filteredResourceCount := 0
		if !isWatchOnly {
			if err := printer.PrintObj(obj, out); err != nil {
				return fmt.Errorf("unable to output the provided object: %v", err)
			}
			filteredResourceCount++
			cmdutil.PrintFilterCount(filteredResourceCount, mapping.Resource, filterOpts)
		}

		// print watched changes
		w, err := r.Watch(rv)
		if err != nil {
			return err
		}

		first := true
		filteredResourceCount = 0
		intr := interrupt.New(nil, w.Stop)
		intr.Run(func() error {
			_, err := watch.Until(0, w, func(e watch.Event) (bool, error) {
				if !isList && first {
					// drop the initial watch event in the single resource case
					first = false
					return false, nil
				}
				err := printer.PrintObj(e.Object, out)
				if err != nil {
					return false, err
				}
				filteredResourceCount++
				cmdutil.PrintFilterCount(filteredResourceCount, mapping.Resource, filterOpts)
				return false, nil
			})
			return err
		})
		return nil
	}

	r := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.UnstructuredClientForMapping), runtime.UnstructuredJSONScheme).
		NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
		FilenameParam(enforceNamespace, &options.FilenameOptions).
		SelectorParam(selector).
		ExportParam(export).
		ResourceTypeOrNameArgs(true, args...).
		ContinueOnError().
		Latest().
		Flatten().
		Do()
	err = r.Err()
	if err != nil {
		return err
	}

	printer, generic, err := cmdutil.PrinterForCommand(cmd)
	if err != nil {
		return err
	}

	if generic {
		// we flattened the data from the builder, so we have individual items, but now we'd like to either:
		// 1. if there is more than one item, combine them all into a single list
		// 2. if there is a single item and that item is a list, leave it as its specific list
		// 3. if there is a single item and it is not a a list, leave it as a single item
		var errs []error
		singular := false
		infos, err := r.IntoSingular(&singular).Infos()
		if err != nil {
			if singular {
				return err
			}
			errs = append(errs, err)
		}
		if len(infos) == 0 && len(errs) == 0 {
			outputEmptyListWarning(errOut)
		}

		res := ""
		if len(infos) > 0 {
			res = infos[0].ResourceMapping().Resource
		}

		var obj runtime.Object
		if singular {
			obj = infos[0].Object
		} else {
			// we have more than one item, so coerce all items into a list
			list := &runtime.UnstructuredList{
				Object: map[string]interface{}{
					"kind":       "List",
					"apiVersion": "v1",
					"metadata":   map[string]interface{}{},
				},
			}
			for _, info := range infos {
				list.Items = append(list.Items, info.Object.(*runtime.Unstructured))
			}
			obj = list
		}

		isList := meta.IsListType(obj)
		if isList {
			filteredResourceCount, items, err := cmdutil.FilterResourceList(obj, filterFuncs, filterOpts)
			if err != nil {
				return err
			}

			// take the filtered items and create a new list for display
			list := &runtime.UnstructuredList{
				Object: map[string]interface{}{
					"kind":       "List",
					"apiVersion": "v1",
					"metadata":   map[string]interface{}{},
				},
			}
			if listMeta, err := meta.ListAccessor(obj); err == nil {
				list.Object["selfLink"] = listMeta.GetSelfLink()
				list.Object["resourceVersion"] = listMeta.GetResourceVersion()
			}

			for _, item := range items {
				list.Items = append(list.Items, item.(*runtime.Unstructured))
			}
			if err := printer.PrintObj(list, out); err != nil {
				errs = append(errs, err)
			}

			cmdutil.PrintFilterCount(filteredResourceCount, res, filterOpts)
			return utilerrors.Reduce(utilerrors.Flatten(utilerrors.NewAggregate(errs)))
		}

		filteredResourceCount := 0
		if isFiltered, err := filterFuncs.Filter(obj, filterOpts); !isFiltered {
			if err != nil {
				glog.V(2).Infof("Unable to filter resource: %v", err)
			} else if err := printer.PrintObj(obj, out); err != nil {
				errs = append(errs, err)
			}
		} else if isFiltered {
			filteredResourceCount++
		}

		cmdutil.PrintFilterCount(filteredResourceCount, res, filterOpts)
		return utilerrors.Reduce(utilerrors.Flatten(utilerrors.NewAggregate(errs)))
	}

	allErrs := []error{}
	errs := sets.NewString()
	infos, err := r.Infos()
	if err != nil {
		allErrs = append(allErrs, err)
	}
	if len(infos) == 0 && len(allErrs) == 0 {
		outputEmptyListWarning(errOut)
	}

	objs := make([]runtime.Object, len(infos))
	for ix := range infos {
		objs[ix] = infos[ix].Object
	}

	sorting, err := cmd.Flags().GetString("sort-by")
	if err != nil {
		return err
	}
	var sorter *kubectl.RuntimeSort
	if len(sorting) > 0 && len(objs) > 1 {
		// TODO: questionable
		if sorter, err = kubectl.SortObjects(f.Decoder(true), objs, sorting); err != nil {
			return err
		}
	}

	// use the default printer for each object
	printer = nil
	var lastMapping *meta.RESTMapping
	w := kubectl.GetNewTabWriter(out)
	filteredResourceCount := 0

	if resource.MultipleTypesRequested(args) || cmdutil.MustPrintWithKinds(objs, infos, sorter) {
		showKind = true
	}

	for ix := range objs {
		var mapping *meta.RESTMapping
		var original runtime.Object
		if sorter != nil {
			mapping = infos[sorter.OriginalPosition(ix)].Mapping
			original = infos[sorter.OriginalPosition(ix)].Object
		} else {
			mapping = infos[ix].Mapping
			original = infos[ix].Object
		}
		if printer == nil || lastMapping == nil || mapping == nil || mapping.Resource != lastMapping.Resource {
			if printer != nil {
				w.Flush()
				cmdutil.PrintFilterCount(filteredResourceCount, lastMapping.Resource, filterOpts)
			}
			printer, err = f.PrinterForMapping(cmd, mapping, allNamespaces)
			if err != nil {
				if !errs.Has(err.Error()) {
					errs.Insert(err.Error())
					allErrs = append(allErrs, err)
				}
				continue
			}

			// add linebreak between resource groups (if there is more than one)
			// skip linebreak above first resource group
			noHeaders := cmdutil.GetFlagBool(cmd, "no-headers")
			if lastMapping != nil && !noHeaders {
				fmt.Fprintf(errOut, "%s\n", "")
			}

			lastMapping = mapping
		}

		// filter objects if filter has been defined for current object
		if isFiltered, err := filterFuncs.Filter(original, filterOpts); isFiltered {
			if err == nil {
				filteredResourceCount++
				continue
			}
			if !errs.Has(err.Error()) {
				errs.Insert(err.Error())
				allErrs = append(allErrs, err)
			}
		}

		if resourcePrinter, found := printer.(*kubectl.HumanReadablePrinter); found {
			resourceName := resourcePrinter.GetResourceKind()
			if mapping != nil {
				if resourceName == "" {
					resourceName = mapping.Resource
				}
				if alias, ok := kubectl.ResourceShortFormFor(mapping.Resource); ok {
					resourceName = alias
				} else if resourceName == "" {
					resourceName = "none"
				}
			} else {
				resourceName = "none"
			}

			if showKind {
				resourcePrinter.EnsurePrintWithKind(resourceName)
			}

			if err := printer.PrintObj(original, w); err != nil {
				if !errs.Has(err.Error()) {
					errs.Insert(err.Error())
					allErrs = append(allErrs, err)
				}
			}
			continue
		}
		if err := printer.PrintObj(original, w); err != nil {
			if !errs.Has(err.Error()) {
				errs.Insert(err.Error())
				allErrs = append(allErrs, err)
			}
			continue
		}
	}
	w.Flush()
	if printer != nil && lastMapping != nil {
		cmdutil.PrintFilterCount(filteredResourceCount, lastMapping.Resource, filterOpts)
	}
	return utilerrors.NewAggregate(allErrs)
}
Exemple #19
0
func visitToPatch(originalObj runtime.Object, updates *resource.Info, mapper meta.RESTMapper, resourceMapper *resource.Mapper, encoder runtime.Encoder, out, errOut io.Writer, defaultVersion unversioned.GroupVersion, results *editResults, file string) error {
	patchVisitor := resource.NewFlattenListVisitor(updates, resourceMapper)
	err := patchVisitor.Visit(func(info *resource.Info, incomingErr error) error {
		currOriginalObj := originalObj

		// if we're editing a list, then navigate the list to find the item that we're currently trying to edit
		if meta.IsListType(originalObj) {
			currOriginalObj = nil
			editObjUID, err := meta.NewAccessor().UID(info.Object)
			if err != nil {
				return err
			}

			listItems, err := meta.ExtractList(originalObj)
			if err != nil {
				return err
			}

			// iterate through the list to find the item with the matching UID
			for i := range listItems {
				originalObjUID, err := meta.NewAccessor().UID(listItems[i])
				if err != nil {
					return err
				}
				if editObjUID == originalObjUID {
					currOriginalObj = listItems[i]
					break
				}
			}
			if currOriginalObj == nil {
				return fmt.Errorf("no original object found for %#v", info.Object)
			}

		}

		originalSerialization, err := runtime.Encode(encoder, currOriginalObj)
		if err != nil {
			return err
		}
		editedSerialization, err := runtime.Encode(encoder, info.Object)
		if err != nil {
			return err
		}

		// compute the patch on a per-item basis
		// use strategic merge to create a patch
		originalJS, err := yaml.ToJSON(originalSerialization)
		if err != nil {
			return err
		}
		editedJS, err := yaml.ToJSON(editedSerialization)
		if err != nil {
			return err
		}

		if reflect.DeepEqual(originalJS, editedJS) {
			// no edit, so just skip it.
			cmdutil.PrintSuccess(mapper, false, out, info.Mapping.Resource, info.Name, false, "skipped")
			return nil
		}

		preconditions := []strategicpatch.PreconditionFunc{strategicpatch.RequireKeyUnchanged("apiVersion"),
			strategicpatch.RequireKeyUnchanged("kind"), strategicpatch.RequireMetadataKeyUnchanged("name")}
		patch, err := strategicpatch.CreateTwoWayMergePatch(originalJS, editedJS, currOriginalObj, preconditions...)
		if err != nil {
			glog.V(4).Infof("Unable to calculate diff, no merge is possible: %v", err)
			if strategicpatch.IsPreconditionFailed(err) {
				return fmt.Errorf("%s", "At least one of apiVersion, kind and name was changed")
			}
			return err
		}

		results.version = defaultVersion
		patched, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch)
		if err != nil {
			fmt.Fprintln(out, results.addError(err, info))
			return nil
		}
		info.Refresh(patched, true)
		cmdutil.PrintSuccess(mapper, false, out, info.Mapping.Resource, info.Name, false, "edited")
		return nil
	})
	return err
}