Golang Factory.PrinterForMapping方法代码示例

//.........这里部分代码省略.........

	patch := cmdutil.GetFlagString(cmd, "patch")
	if len(patch) == 0 {
		return cmdutil.UsageError(cmd, "Must specify -p to patch")
	}
	patchBytes, err := yaml.ToJSON([]byte(patch))
	if err != nil {
		return fmt.Errorf("unable to parse %q: %v", patch, err)
	}

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

	count := 0
	err = r.Visit(func(info *resource.Info, err error) error {
		if err != nil {
			return err
		}
		name, namespace := info.Name, info.Namespace
		mapping := info.ResourceMapping()
		client, err := f.ClientForMapping(mapping)
		if err != nil {
			return err
		}

		if !options.Local {
			helper := resource.NewHelper(client, mapping)
			_, err := helper.Patch(namespace, name, patchType, patchBytes)
			if err != nil {
				return err
			}
			if cmdutil.ShouldRecord(cmd, info) {
				// don't return an error on failure.  The patch itself succeeded, its only the hint for that change that failed
				// don't bother checking for failures of this replace, because a failure to indicate the hint doesn't fail the command
				// also, don't force the replacement.  If the replacement fails on a resourceVersion conflict, then it means this
				// record hint is likely to be invalid anyway, so avoid the bad hint
				patch, err := cmdutil.ChangeResourcePatch(info, f.Command())
				if err == nil {
					helper.Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch)
				}
			}
			count++

			if options.OutputFormat == "name" || len(options.OutputFormat) == 0 {
				cmdutil.PrintSuccess(mapper, options.OutputFormat == "name", out, "", name, false, "patched")
			}
			return nil
		}

		count++

		patchedObj, err := api.Scheme.DeepCopy(info.VersionedObject)
		if err != nil {
			return err
		}
		originalObjJS, err := runtime.Encode(api.Codecs.LegacyCodec(mapping.GroupVersionKind.GroupVersion()), info.VersionedObject.(runtime.Object))
		if err != nil {
			return err
		}
		originalPatchedObjJS, err := getPatchedJSON(patchType, originalObjJS, patchBytes, patchedObj.(runtime.Object))
		if err != nil {
			return err
		}
		targetObj, err := runtime.Decode(api.Codecs.UniversalDecoder(), originalPatchedObjJS)
		if err != nil {
			return err
		}
		// TODO: if we ever want to go generic, this allows a clean -o yaml without trying to print columns or anything
		// rawExtension := &runtime.Unknown{
		//	Raw: originalPatchedObjJS,
		// }

		printer, err := f.PrinterForMapping(cmd, mapping, false)
		if err != nil {
			return err
		}
		if err := printer.PrintObj(targetObj, out); err != nil {
			return err
		}

		return nil
	})
	if err != nil {
		return err
	}
	if count == 0 {
		return fmt.Errorf("no objects passed to patch")
	}
	return nil
}

// 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, cmd *cobra.Command, args []string, options *GetOptions) error {
	selector := cmdutil.GetFlagString(cmd, "selector")
	allNamespaces := cmdutil.GetFlagBool(cmd, "all-namespaces")
	mapper, typer := f.Object()

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

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

	// 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.Filenames...).
			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
		}
		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)
			}
		}

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

		kubectl.WatchLoop(w, func(e watch.Event) error {
			return printer.PrintObj(e.Object, out)
		})
		return nil
	}

	b := resource.NewBuilder(mapper, typer, resource.ClientMapperFunc(f.ClientForMapping), f.Decoder(true)).
		NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
		FilenameParam(enforceNamespace, options.Filenames...).
		SelectorParam(selector).
		ExportParam(export).
		ResourceTypeOrNameArgs(true, args...).
		ContinueOnError().
		Latest()
	printer, generic, err := cmdutil.PrinterForCommand(cmd)
	if err != nil {
		return err
	}

	if generic {
		clientConfig, err := f.ClientConfig()
//.........这里部分代码省略.........

// 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, cmd *cobra.Command, args []string) error {
	selector := cmdutil.GetFlagString(cmd, "selector")
	allNamespaces := cmdutil.GetFlagBool(cmd, "all-namespaces")
	mapper, typer := f.Object()

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

	filenames := cmdutil.GetFlagStringSlice(cmd, "filename")

	if len(args) == 0 && len(filenames) == 0 {
		fmt.Fprint(out, "You must specify the type of resource to get. ", valid_resources, `   * componentstatuses (aka 'cs')
   * endpoints (aka 'ep')
`)
		return cmdutil.UsageError(cmd, "Required resource not specified.")
	}

	// 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, f.ClientMapperForCommand()).
			NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
			FilenameParam(enforceNamespace, filenames...).
			SelectorParam(selector).
			ResourceTypeOrNameArgs(true, args...).
			SingleResourceType().
			Latest().
			Do()
		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 a single resource - %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
		}
		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)
			}
		}

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

		kubectl.WatchLoop(w, func(e watch.Event) error {
			return printer.PrintObj(e.Object, out)
		})
		return nil
	}

	b := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
		NamespaceParam(cmdNamespace).DefaultNamespace().AllNamespaces(allNamespaces).
		FilenameParam(enforceNamespace, filenames...).
		SelectorParam(selector).
		ResourceTypeOrNameArgs(true, args...).
		ContinueOnError().
		Latest()
	printer, generic, err := cmdutil.PrinterForCommand(cmd)
	if err != nil {
		return err
	}

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

		singular := false
		r := b.Flatten().Do()
		infos, err := r.IntoSingular(&singular).Infos()
		if err != nil {
//.........这里部分代码省略.........

// 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
//.........这里部分代码省略.........

// 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
//.........这里部分代码省略.........

func RunLabel(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []string) error {
	resources, labelArgs := []string{}, []string{}
	first := true
	for _, s := range args {
		isLabel := strings.Contains(s, "=") || strings.HasSuffix(s, "-")
		switch {
		case first && isLabel:
			first = false
			fallthrough
		case !first && isLabel:
			labelArgs = append(labelArgs, s)
		case first && !isLabel:
			resources = append(resources, s)
		case !first && !isLabel:
			return cmdutil.UsageError(cmd, "all resources must be specified before label changes: %s", s)
		}
	}
	filenames := cmdutil.GetFlagStringSlice(cmd, "filename")
	if len(resources) < 1 && len(filenames) == 0 {
		return cmdutil.UsageError(cmd, "one or more resources must be specified as <resource> <name> or <resource>/<name>")
	}
	if len(labelArgs) < 1 {
		return cmdutil.UsageError(cmd, "at least one label update is required")
	}

	selector := cmdutil.GetFlagString(cmd, "selector")
	all := cmdutil.GetFlagBool(cmd, "all")
	overwrite := cmdutil.GetFlagBool(cmd, "overwrite")
	resourceVersion := cmdutil.GetFlagString(cmd, "resource-version")

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

	labels, remove, err := parseLabels(labelArgs)
	if err != nil {
		return cmdutil.UsageError(cmd, err.Error())
	}
	mapper, typer := f.Object()
	b := resource.NewBuilder(mapper, typer, f.ClientMapperForCommand()).
		ContinueOnError().
		NamespaceParam(cmdNamespace).DefaultNamespace().
		FilenameParam(enforceNamespace, filenames...).
		SelectorParam(selector).
		ResourceTypeOrNameArgs(all, resources...).
		Flatten().
		Latest()

	one := false
	r := b.Do().IntoSingular(&one)
	if err := r.Err(); err != nil {
		return err
	}

	// only apply resource version locking on a single resource
	if !one && len(resourceVersion) > 0 {
		return cmdutil.UsageError(cmd, "--resource-version may only be used with a single resource")
	}

	// TODO: support bulk generic output a la Get
	return r.Visit(func(info *resource.Info, err error) error {
		if err != nil {
			return err
		}
		obj, err := cmdutil.UpdateObject(info, func(obj runtime.Object) error {
			err := labelFunc(obj, overwrite, resourceVersion, labels, remove)
			if err != nil {
				return err
			}
			return nil
		})
		if err != nil {
			return err
		}

		printer, err := f.PrinterForMapping(cmd, info.Mapping, false)
		if err != nil {
			return err
		}
		return printer.PrintObj(obj, out)
	})
}