Golang describe.NewHumanReadablePrinter函数代码示例

// NewCmdGet is a wrapper for the Kubernetes cli get command
func NewCmdGet(fullName string, f *clientcmd.Factory, out io.Writer) *cobra.Command {
	p := describe.NewHumanReadablePrinter(false, false)
	validArgs := p.HandledResources()

	cmd := kcmd.NewCmdGet(f.Factory, out)
	cmd.Long = getLong
	cmd.Example = fmt.Sprintf(getExample, fullName)
	cmd.ValidArgs = validArgs
	return cmd
}

//.........这里部分代码省略.........
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			if bopts.Version != nil {
				return nil, errors.New("cannot specify a version and a build")
			}
			return oc.BuildLogs(t.Namespace).Get(t.Name, *bopts), nil
		case *buildapi.BuildConfig:
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			builds, err := oc.Builds(t.Namespace).List(api.ListOptions{})
			if err != nil {
				return nil, err
			}
			builds.Items = buildapi.FilterBuilds(builds.Items, buildapi.ByBuildConfigLabelPredicate(t.Name))
			if len(builds.Items) == 0 {
				return nil, fmt.Errorf("no builds found for %q", t.Name)
			}
			if bopts.Version != nil {
				// If a version has been specified, try to get the logs from that build.
				desired := buildutil.BuildNameForConfigVersion(t.Name, int(*bopts.Version))
				return oc.BuildLogs(t.Namespace).Get(desired, *bopts), nil
			}
			sort.Sort(sort.Reverse(buildapi.BuildSliceByCreationTimestamp(builds.Items)))
			return oc.BuildLogs(t.Namespace).Get(builds.Items[0].Name, *bopts), nil
		default:
			return kLogsForObjectFunc(object, options)
		}
	}
	w.Printer = func(mapping *meta.RESTMapping, noHeaders, withNamespace, wide bool, showAll bool, showLabels, absoluteTimestamps bool, columnLabels []string) (kubectl.ResourcePrinter, error) {
		return describe.NewHumanReadablePrinter(noHeaders, withNamespace, wide, showAll, showLabels, absoluteTimestamps, columnLabels), nil
	}
	kCanBeExposed := w.Factory.CanBeExposed
	w.CanBeExposed = func(kind unversioned.GroupKind) error {
		if kind == deployapi.Kind("DeploymentConfig") {
			return nil
		}
		return kCanBeExposed(kind)
	}
	kCanBeAutoscaled := w.Factory.CanBeAutoscaled
	w.CanBeAutoscaled = func(kind unversioned.GroupKind) error {
		if kind == deployapi.Kind("DeploymentConfig") {
			return nil
		}
		return kCanBeAutoscaled(kind)
	}
	kAttachablePodForObjectFunc := w.Factory.AttachablePodForObject
	w.AttachablePodForObject = func(object runtime.Object) (*api.Pod, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			var err error
			var pods *api.PodList
			for pods == nil || len(pods.Items) == 0 {
				if t.Status.LatestVersion == 0 {
					time.Sleep(2 * time.Second)
				}
				if t, err = oc.DeploymentConfigs(t.Namespace).Get(t.Name); err != nil {
					return nil, err
				}

//.........这里部分代码省略.........
			}
			oc, _, err := w.Clients()
			if err != nil {
				return nil, err
			}
			builds, err := oc.Builds(t.Namespace).List(api.ListOptions{})
			if err != nil {
				return nil, err
			}
			builds.Items = buildapi.FilterBuilds(builds.Items, buildapi.ByBuildConfigPredicate(t.Name))
			if len(builds.Items) == 0 {
				return nil, fmt.Errorf("no builds found for %q", t.Name)
			}
			if bopts.Version != nil {
				// If a version has been specified, try to get the logs from that build.
				desired := buildutil.BuildNameForConfigVersion(t.Name, int(*bopts.Version))
				return oc.BuildLogs(t.Namespace).Get(desired, *bopts), nil
			}
			sort.Sort(sort.Reverse(buildapi.BuildSliceByCreationTimestamp(builds.Items)))
			return oc.BuildLogs(t.Namespace).Get(builds.Items[0].Name, *bopts), nil
		default:
			return kLogsForObjectFunc(object, options)
		}
	}
	// Saves current resource name (or alias if any) in PrintOptions. Once saved, it will not be overwritten by the
	// kubernetes resource alias look-up, as it will notice a non-empty value in `options.Kind`
	w.Printer = func(mapping *meta.RESTMapping, options kubectl.PrintOptions) (kubectl.ResourcePrinter, error) {
		if mapping != nil {
			options.Kind = mapping.Resource
			if alias, ok := resourceShortFormFor(mapping.Resource); ok {
				options.Kind = alias
			}
		}
		return describe.NewHumanReadablePrinter(options), nil
	}
	// PrintResourceInfos receives a list of resource infos and prints versioned objects if a generic output format was specified
	// otherwise, it iterates through info objects, printing each resource with a unique printer for its mapping
	w.PrintResourceInfos = func(cmd *cobra.Command, infos []*resource.Info, out io.Writer) error {
		printer, generic, err := cmdutil.PrinterForCommand(cmd)
		if err != nil {
			return nil
		}
		if !generic {
			for _, info := range infos {
				mapping := info.ResourceMapping()
				printer, err := w.PrinterForMapping(cmd, mapping, false)
				if err != nil {
					return err
				}
				if err := printer.PrintObj(info.Object, out); err != nil {
					return nil
				}
			}
			return nil
		}

		clientConfig, err := w.ClientConfig()
		if err != nil {
			return err
		}
		outputVersion, err := cmdutil.OutputVersion(cmd, clientConfig.GroupVersion)
		if err != nil {
			return err
		}
		object, err := resource.AsVersionedObject(infos, len(infos) != 1, outputVersion, api.Codecs.LegacyCodec(outputVersion))
		if err != nil {

//.........这里部分代码省略.........
		}

		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			dopts, ok := options.(*deployapi.DeploymentLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a DeploymentLogOptions")
			}
			return oc.DeploymentLogs(t.Namespace).Get(t.Name, *dopts), nil
		case *buildapi.Build:
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			if bopts.Version != nil {
				// should --version work with builds at all?
				return nil, errors.New("cannot specify a version and a build")
			}
			return oc.BuildLogs(t.Namespace).Get(t.Name, *bopts), nil
		case *buildapi.BuildConfig:
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			builds, err := oc.Builds(t.Namespace).List(labels.Everything(), fields.Everything())
			if err != nil {
				return nil, err
			}
			builds.Items = buildapi.FilterBuilds(builds.Items, buildapi.ByBuildConfigLabelPredicate(t.Name))
			if len(builds.Items) == 0 {
				return nil, fmt.Errorf("no builds found for %s", t.Name)
			}
			if bopts.Version != nil {
				// If a version has been specified, try to get the logs from that build.
				desired := buildutil.BuildNameForConfigVersion(t.Name, int(*bopts.Version))
				return oc.BuildLogs(t.Namespace).Get(desired, *bopts), nil
			}
			sort.Sort(sort.Reverse(buildapi.BuildSliceByCreationTimestamp(builds.Items)))
			return oc.BuildLogs(t.Namespace).Get(builds.Items[0].Name, *bopts), nil
		default:
			return kLogsForObjectFunc(object, options)
		}
	}
	w.Printer = func(mapping *meta.RESTMapping, noHeaders, withNamespace, wide bool, showAll bool, columnLabels []string) (kubectl.ResourcePrinter, error) {
		return describe.NewHumanReadablePrinter(noHeaders, withNamespace, wide, showAll, columnLabels), nil
	}
	kCanBeExposed := w.Factory.CanBeExposed
	w.CanBeExposed = func(kind string) error {
		if kind == "DeploymentConfig" {
			return nil
		}
		return kCanBeExposed(kind)
	}
	kAttachablePodForObjectFunc := w.Factory.AttachablePodForObject
	w.AttachablePodForObject = func(object runtime.Object) (*api.Pod, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			var err error
			var pods *api.PodList
			for pods == nil || len(pods.Items) == 0 {
				if t.Status.LatestVersion == 0 {
					time.Sleep(2 * time.Second)
				}
				if t, err = oc.DeploymentConfigs(t.Namespace).Get(t.Name); err != nil {
					return nil, err
				}
				latestDeploymentName := deployutil.LatestDeploymentNameForConfig(t)
				deployment, err := kc.ReplicationControllers(t.Namespace).Get(latestDeploymentName)
				if err != nil {
					if kerrors.IsNotFound(err) {
						continue
					}
					return nil, err
				}
				pods, err = kc.Pods(deployment.Namespace).List(labels.SelectorFromSet(deployment.Spec.Selector), fields.Everything())
				if err != nil {
					return nil, err
				}
				if len(pods.Items) == 0 {
					time.Sleep(2 * time.Second)
				}
			}
			var oldestPod *api.Pod
			for _, pod := range pods.Items {
				if oldestPod == nil || pod.CreationTimestamp.Before(oldestPod.CreationTimestamp) {
					oldestPod = &pod
				}
			}
			return oldestPod, nil
		default:
			return kAttachablePodForObjectFunc(object)
		}
	}

	return w
}

//.........这里部分代码省略.........
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			if bopts.Version != nil {
				return nil, errors.New("cannot specify a version and a build")
			}
			return oc.BuildLogs(t.Namespace).Get(t.Name, *bopts), nil
		case *buildapi.BuildConfig:
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			builds, err := oc.Builds(t.Namespace).List(api.ListOptions{})
			if err != nil {
				return nil, err
			}
			builds.Items = buildapi.FilterBuilds(builds.Items, buildapi.ByBuildConfigPredicate(t.Name))
			if len(builds.Items) == 0 {
				return nil, fmt.Errorf("no builds found for %q", t.Name)
			}
			if bopts.Version != nil {
				// If a version has been specified, try to get the logs from that build.
				desired := buildutil.BuildNameForConfigVersion(t.Name, int(*bopts.Version))
				return oc.BuildLogs(t.Namespace).Get(desired, *bopts), nil
			}
			sort.Sort(sort.Reverse(buildapi.BuildSliceByCreationTimestamp(builds.Items)))
			return oc.BuildLogs(t.Namespace).Get(builds.Items[0].Name, *bopts), nil
		default:
			return kLogsForObjectFunc(object, options)
		}
	}
	w.Printer = func(mapping *meta.RESTMapping, noHeaders, withNamespace, wide bool, showAll bool, showLabels, absoluteTimestamps bool, columnLabels []string) (kubectl.ResourcePrinter, error) {
		return describe.NewHumanReadablePrinter(noHeaders, withNamespace, wide, showAll, showLabels, absoluteTimestamps, columnLabels), nil
	}
	kCanBeExposed := w.Factory.CanBeExposed
	w.CanBeExposed = func(kind unversioned.GroupKind) error {
		if kind == deployapi.Kind("DeploymentConfig") {
			return nil
		}
		return kCanBeExposed(kind)
	}
	kCanBeAutoscaled := w.Factory.CanBeAutoscaled
	w.CanBeAutoscaled = func(kind unversioned.GroupKind) error {
		if kind == deployapi.Kind("DeploymentConfig") {
			return nil
		}
		return kCanBeAutoscaled(kind)
	}
	kAttachablePodForObjectFunc := w.Factory.AttachablePodForObject
	w.AttachablePodForObject = func(object runtime.Object) (*api.Pod, error) {
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			_, kc, err := w.Clients()
			if err != nil {
				return nil, err
			}
			selector := labels.SelectorFromSet(t.Spec.Selector)
			f := func(pods []*api.Pod) sort.Interface { return sort.Reverse(controller.ActivePods(pods)) }
			pod, _, err := cmdutil.GetFirstPod(kc, t.Namespace, selector, 1*time.Minute, f)
			return pod, err
		default:
			return kAttachablePodForObjectFunc(object)
		}
	}
	kProtocolsForObject := w.Factory.ProtocolsForObject

//.........这里部分代码省略.........
		OpenShiftClientConfig: clientConfig,
		clients:               clients,
	}

	w.Object = func() (meta.RESTMapper, runtime.ObjectTyper) {
		if cfg, err := clientConfig.ClientConfig(); err == nil {
			return kubectl.OutputVersionMapper{mapper, cfg.Version}, api.Scheme
		}
		return mapper, api.Scheme
	}

	kRESTClient := w.Factory.RESTClient
	w.RESTClient = func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
		if latest.OriginKind(mapping.Kind, mapping.APIVersion) {
			client, err := clients.ClientForVersion(mapping.APIVersion)
			if err != nil {
				return nil, err
			}
			return client.RESTClient, nil
		}
		return kRESTClient(mapping)
	}

	// Save original Describer function
	kDescriberFunc := w.Factory.Describer
	w.Describer = func(mapping *meta.RESTMapping) (kubectl.Describer, error) {
		if latest.OriginKind(mapping.Kind, mapping.APIVersion) {
			oClient, kClient, err := w.Clients()
			if err != nil {
				return nil, fmt.Errorf("unable to create client %s: %v", mapping.Kind, err)
			}

			cfg, err := clients.ClientConfigForVersion(mapping.APIVersion)
			if err != nil {
				return nil, fmt.Errorf("unable to load a client %s: %v", mapping.Kind, err)
			}

			describer, ok := describe.DescriberFor(mapping.Kind, oClient, kClient, cfg.Host)
			if !ok {
				return nil, fmt.Errorf("no description has been implemented for %q", mapping.Kind)
			}
			return describer, nil
		}
		return kDescriberFunc(mapping)
	}
	kScalerFunc := w.Factory.Scaler
	w.Scaler = func(mapping *meta.RESTMapping) (kubectl.Scaler, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}

		if mapping.Kind == "DeploymentConfig" {
			return deployscaler.NewDeploymentConfigScaler(oc, kc), nil
		}
		return kScalerFunc(mapping)
	}
	kReaperFunc := w.Factory.Reaper
	w.Reaper = func(mapping *meta.RESTMapping) (kubectl.Reaper, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}

		if mapping.Kind == "DeploymentConfig" {
			return deployreaper.NewDeploymentConfigReaper(oc, kc), nil
		}
		return kReaperFunc(mapping)
	}
	kGeneratorFunc := w.Factory.Generator
	w.Generator = func(name string) (kubectl.Generator, bool) {
		if generator, ok := generators[name]; ok {
			return generator, true
		}
		return kGeneratorFunc(name)
	}
	kPodSelectorForObjectFunc := w.Factory.PodSelectorForObject
	w.PodSelectorForObject = func(object runtime.Object) (string, error) {
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			return kubectl.MakeLabels(t.Template.ControllerTemplate.Selector), nil
		default:
			return kPodSelectorForObjectFunc(object)
		}
	}
	kPortsForObjectFunc := w.Factory.PortsForObject
	w.PortsForObject = func(object runtime.Object) ([]string, error) {
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			return getPorts(t.Template.ControllerTemplate.Template.Spec), nil
		default:
			return kPortsForObjectFunc(object)
		}
	}
	w.Printer = func(mapping *meta.RESTMapping, noHeaders, withNamespace, wide bool, columnLabels []string) (kubectl.ResourcePrinter, error) {
		return describe.NewHumanReadablePrinter(noHeaders, withNamespace, wide, columnLabels), nil
	}

	return w
}

//.........这里部分代码省略.........
	w.RESTClient = func(mapping *meta.RESTMapping) (resource.RESTClient, error) {
		if latest.OriginKind(mapping.Kind, mapping.APIVersion) {
			client, err := clients.ClientForVersion(mapping.APIVersion)
			if err != nil {
				return nil, err
			}
			return client.RESTClient, nil
		}
		return kRESTClient(mapping)
	}

	// Save original Describer function
	kDescriberFunc := w.Factory.Describer
	w.Describer = func(mapping *meta.RESTMapping) (kubectl.Describer, error) {
		if latest.OriginKind(mapping.Kind, mapping.APIVersion) {
			oClient, kClient, err := w.Clients()
			if err != nil {
				return nil, fmt.Errorf("unable to create client %s: %v", mapping.Kind, err)
			}

			cfg, err := clients.ClientConfigForVersion(mapping.APIVersion)
			if err != nil {
				return nil, fmt.Errorf("unable to load a client %s: %v", mapping.Kind, err)
			}

			describer, ok := describe.DescriberFor(mapping.Kind, oClient, kClient, cfg.Host)
			if !ok {
				return nil, fmt.Errorf("no description has been implemented for %q", mapping.Kind)
			}
			return describer, nil
		}
		return kDescriberFunc(mapping)
	}
	w.Scaler = func(mapping *meta.RESTMapping) (kubectl.Scaler, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}
		return deploy.ScalerFor(mapping.Kind, oc, kc)
	}
	w.Reaper = func(mapping *meta.RESTMapping) (kubectl.Reaper, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}
		return deployreaper.ReaperFor(mapping.Kind, oc, kc)
	}
	kGeneratorFunc := w.Factory.Generator
	w.Generator = func(name string) (kubectl.Generator, bool) {
		if generator, ok := generators[name]; ok {
			return generator, true
		}
		return kGeneratorFunc(name)
	}
	w.PodSelectorForObject = func(object runtime.Object) (string, error) {
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			return kubectl.MakeLabels(t.Template.ControllerTemplate.Selector), nil
		case *api.ReplicationController:
			return kubectl.MakeLabels(t.Spec.Selector), nil
		case *api.Pod:
			if len(t.Labels) == 0 {
				return "", fmt.Errorf("the pod has no labels and cannot be exposed")
			}
			return kubectl.MakeLabels(t.Labels), nil
		case *api.Service:
			if t.Spec.Selector == nil {
				return "", fmt.Errorf("the service has no pod selector set")
			}
			return kubectl.MakeLabels(t.Spec.Selector), nil
		default:
			kind, err := meta.NewAccessor().Kind(object)
			if err != nil {
				return "", err
			}
			return "", fmt.Errorf("it is not possible to get a pod selector from %s", kind)
		}
	}
	w.PortsForObject = func(object runtime.Object) ([]string, error) {
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			return getPorts(t.Template.ControllerTemplate.Template.Spec), nil
		case *api.ReplicationController:
			return getPorts(t.Spec.Template.Spec), nil
		case *api.Pod:
			return getPorts(t.Spec), nil
		default:
			kind, err := meta.NewAccessor().Kind(object)
			if err != nil {
				return nil, err
			}
			return nil, fmt.Errorf("it is not possible to get ports from %s", kind)
		}
	}
	w.Printer = func(mapping *meta.RESTMapping, noHeaders, withNamespace bool) (kubectl.ResourcePrinter, error) {
		return describe.NewHumanReadablePrinter(noHeaders, withNamespace), nil
	}

	return w
}

//.........这里部分代码省略.........
	w.Scaler = func(mapping *meta.RESTMapping) (kubectl.Scaler, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}

		if mapping.Kind == "DeploymentConfig" {
			return deployscaler.NewDeploymentConfigScaler(oc, kc), nil
		}
		return kScalerFunc(mapping)
	}
	kReaperFunc := w.Factory.Reaper
	w.Reaper = func(mapping *meta.RESTMapping) (kubectl.Reaper, error) {
		oc, kc, err := w.Clients()
		if err != nil {
			return nil, err
		}

		if mapping.Kind == "DeploymentConfig" {
			return deployreaper.NewDeploymentConfigReaper(oc, kc), nil
		}
		return kReaperFunc(mapping)
	}
	kGeneratorFunc := w.Factory.Generator
	w.Generator = func(name string) (kubectl.Generator, bool) {
		if generator, ok := generators[name]; ok {
			return generator, true
		}
		return kGeneratorFunc(name)
	}
	kPodSelectorForObjectFunc := w.Factory.PodSelectorForObject
	w.PodSelectorForObject = func(object runtime.Object) (string, error) {
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			return kubectl.MakeLabels(t.Template.ControllerTemplate.Selector), nil
		default:
			return kPodSelectorForObjectFunc(object)
		}
	}
	kPortsForObjectFunc := w.Factory.PortsForObject
	w.PortsForObject = func(object runtime.Object) ([]string, error) {
		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			return getPorts(t.Template.ControllerTemplate.Template.Spec), nil
		default:
			return kPortsForObjectFunc(object)
		}
	}
	kLogsForObjectFunc := w.Factory.LogsForObject
	w.LogsForObject = func(object, options runtime.Object) (*kclient.Request, error) {
		oc, _, err := w.Clients()
		if err != nil {
			return nil, err
		}

		switch t := object.(type) {
		case *deployapi.DeploymentConfig:
			dopts, ok := options.(*deployapi.DeploymentLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a DeploymentLogOptions")
			}
			return oc.DeploymentLogs(t.Namespace).Get(t.Name, *dopts), nil
		case *buildapi.Build:
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			return oc.BuildLogs(t.Namespace).Get(t.Name, *bopts), nil
		case *buildapi.BuildConfig:
			bopts, ok := options.(*buildapi.BuildLogOptions)
			if !ok {
				return nil, errors.New("provided options object is not a BuildLogOptions")
			}
			buildsForBCSelector := labels.SelectorFromSet(map[string]string{buildapi.BuildConfigLabel: t.Name})
			builds, err := oc.Builds(t.Namespace).List(buildsForBCSelector, fields.Everything())
			if err != nil {
				return nil, err
			}
			if len(builds.Items) == 0 {
				return nil, fmt.Errorf("no builds found for %s", t.Name)
			}
			sort.Sort(sort.Reverse(buildapi.BuildSliceByCreationTimestamp(builds.Items)))
			return oc.BuildLogs(t.Namespace).Get(builds.Items[0].Name, *bopts), nil
		default:
		}
		return kLogsForObjectFunc(object, options)
	}
	w.Printer = func(mapping *meta.RESTMapping, noHeaders, withNamespace, wide bool, showAll bool, columnLabels []string) (kubectl.ResourcePrinter, error) {
		return describe.NewHumanReadablePrinter(noHeaders, withNamespace, wide, showAll, columnLabels), nil
	}
	kCanBeExposed := w.Factory.CanBeExposed
	w.CanBeExposed = func(kind string) error {
		if kind == "DeploymentConfig" {
			return nil
		}
		return kCanBeExposed(kind)
	}

	return w
}