Golang resource.NewHelper函数代码示例

func runDelete(namespace, name string, mapping *meta.RESTMapping, c resource.RESTClient, helper *resource.Helper, cascade bool, gracePeriod int, clientsetFunc func() (*internalclientset.Clientset, error)) error {
	if !cascade {
		if helper == nil {
			helper = resource.NewHelper(c, mapping)
		}
		return helper.Delete(namespace, name)
	}
	cs, err := clientsetFunc()
	if err != nil {
		return err
	}
	r, err := kubectl.ReaperFor(mapping.GroupVersionKind.GroupKind(), cs)
	if err != nil {
		if _, ok := err.(*kubectl.NoSuchReaperError); !ok {
			return err
		}
		return resource.NewHelper(c, mapping).Delete(namespace, name)
	}
	var options *api.DeleteOptions
	if gracePeriod >= 0 {
		options = api.NewDeleteOptions(int64(gracePeriod))
	}
	if err := r.Stop(namespace, name, 2*time.Minute, options); err != nil {
		return err
	}
	return nil
}

func (o *ResourcesOptions) Run() error {
	allErrs := []error{}
	patches := CalculatePatches(o.Infos, o.Encoder, func(info *resource.Info) (bool, error) {
		transformed := false
		_, err := o.UpdatePodSpecForObject(info.Object, func(spec *api.PodSpec) error {
			containers, _ := selectContainers(spec.Containers, o.ContainerSelector)
			if len(containers) != 0 {
				for i := range containers {
					containers[i].Resources = o.ResourceRequirements
					transformed = true
				}
			} else {
				allErrs = append(allErrs, fmt.Errorf("error: unable to find container named %s", o.ContainerSelector))
			}
			return nil
		})
		return transformed, err
	})

	for _, patch := range patches {
		info := patch.Info
		if patch.Err != nil {
			allErrs = append(allErrs, fmt.Errorf("error: %s/%s %v\n", info.Mapping.Resource, info.Name, patch.Err))
			continue
		}

		//no changes
		if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
			allErrs = append(allErrs, fmt.Errorf("info: %s %q was not changed\n", info.Mapping.Resource, info.Name))
			continue
		}

		if cmdutil.GetDryRunFlag(o.Cmd) {
			fmt.Fprintln(o.Err, "info: running in local mode...")
			return o.PrintObject(o.Cmd, o.Mapper, info.Object, o.Out)
		}

		obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch.Patch)
		if err != nil {
			allErrs = append(allErrs, fmt.Errorf("failed to patch limit update to pod template %v\n", err))
			continue
		}
		info.Refresh(obj, true)

		//record this change (for rollout history)
		if o.Record || cmdutil.ContainsChangeCause(info) {
			if err := cmdutil.RecordChangeCause(obj, o.ChangeCause); err == nil {
				if obj, err = resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, obj); err != nil {
					allErrs = append(allErrs, fmt.Errorf("changes to %s/%s can't be recorded: %v\n", info.Mapping.Resource, info.Name, err))
				}
			}
		}
		info.Refresh(obj, true)
		cmdutil.PrintSuccess(o.Mapper, o.ShortOutput, o.Out, info.Mapping.Resource, info.Name, false, "resource requirements updated")
	}
	return utilerrors.NewAggregate(allErrs)
}

// RunSelector executes the command.
func (o *SelectorOptions) RunSelector() error {
	if !o.local {
		o.builder = o.builder.ResourceTypeOrNameArgs(o.all, o.resources...).
			Latest()
	}
	r := o.builder.Do()
	err := r.Err()
	if err != nil {
		return err
	}

	return r.Visit(func(info *resource.Info, err error) error {
		patch := &Patch{Info: info}
		CalculatePatch(patch, o.encoder, func(info *resource.Info) ([]byte, error) {
			selectErr := updateSelectorForObject(info.Object, *o.selector)

			if selectErr == nil {
				return runtime.Encode(o.encoder, info.Object)
			}
			return nil, selectErr
		})

		if patch.Err != nil {
			return patch.Err
		}
		if o.local || o.dryrun {
			fmt.Fprintln(o.out, "running in local/dry-run mode...")
			o.PrintObject(info.Object)
			return nil
		}

		patched, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch.Patch)
		if err != nil {
			return err
		}

		if o.record || cmdutil.ContainsChangeCause(info) {
			if err := cmdutil.RecordChangeCause(patched, o.changeCause); err == nil {
				if patched, err = resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, patched); err != nil {
					return fmt.Errorf("changes to %s/%s can't be recorded: %v\n", info.Mapping.Resource, info.Name, err)
				}
			}
		}

		info.Refresh(patched, true)
		cmdutil.PrintSuccess(o.mapper, false, o.out, info.Mapping.Resource, info.Name, o.dryrun, "selector updated")
		return nil
	})
}

func (o ResumeConfig) RunResume() error {
	allErrs := []error{}
	// Defaulting to SMPatchVersion_1_5 is safe, since Resumer only update a boolean variable
	for _, patch := range set.CalculatePatches(o.f, o.Infos, o.Encoder, strategicpatch.SMPatchVersion_1_5, o.Resumer) {
		info := patch.Info

		if patch.Err != nil {
			allErrs = append(allErrs, fmt.Errorf("error: %s %q %v", info.Mapping.Resource, info.Name, patch.Err))
			continue
		}

		if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
			cmdutil.PrintSuccess(o.Mapper, false, o.Out, info.Mapping.Resource, info.Name, false, "already resumed")
			continue
		}

		obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch.Patch)
		if err != nil {
			allErrs = append(allErrs, fmt.Errorf("failed to patch: %v", err))
			continue
		}

		info.Refresh(obj, true)
		cmdutil.PrintSuccess(o.Mapper, false, o.Out, info.Mapping.Resource, info.Name, false, "resumed")
	}

	return utilerrors.NewAggregate(allErrs)
}

// popCluster fetches the cluster object with the given name, deletes
// it and returns the deleted cluster object.
func popCluster(f cmdutil.Factory, name string) (*federationapi.Cluster, error) {
	// Boilerplate to create the secret in the host cluster.
	mapper, typer := f.Object()
	gvks, _, err := typer.ObjectKinds(&federationapi.Cluster{})
	if err != nil {
		return nil, err
	}
	gvk := gvks[0]
	mapping, err := mapper.RESTMapping(schema.GroupKind{Group: gvk.Group, Kind: gvk.Kind}, gvk.Version)
	if err != nil {
		return nil, err
	}
	client, err := f.ClientForMapping(mapping)
	if err != nil {
		return nil, err
	}

	rh := resource.NewHelper(client, mapping)
	obj, err := rh.Get("", name, false)

	if isNotFound(err) {
		// Cluster isn't registered, there isn't anything to be done here.
		return nil, nil
	} else if err != nil {
		return nil, err
	}
	cluster, ok := obj.(*federationapi.Cluster)
	if !ok {
		return nil, fmt.Errorf("unexpected object type: expected \"federation/v1beta1.Cluster\", got %T: obj: %#v", obj, obj)
	}

	// Remove the cluster resource in the federation API server by
	// calling rh.Delete()
	return cluster, rh.Delete("", name)
}

// Create attempts to create each item generically, gathering all errors in the
// event a failure occurs. The contents of list will be updated to include the
// version from the server.
func (b *Bulk) Create(list *kapi.List, namespace string) []error {
	resourceMapper := &resource.Mapper{b.Typer, b.Mapper, resource.ClientMapperFunc(b.RESTClientFactory)}
	after := b.After
	if after == nil {
		after = func(*resource.Info, error) {}
	}

	errs := []error{}
	for i, item := range list.Items {
		info, err := resourceMapper.InfoForObject(item)
		if err != nil {
			errs = append(errs, err)
			after(info, err)
			continue
		}
		data, err := info.Mapping.Codec.Encode(item)
		if err != nil {
			errs = append(errs, err)
			after(info, err)
			continue
		}
		obj, err := resource.NewHelper(info.Client, info.Mapping).Create(namespace, false, data)
		if err != nil {
			errs = append(errs, err)
			after(info, err)
			continue
		}
		info.Refresh(obj, true)
		list.Items[i] = obj
		after(info, nil)
	}
	return errs
}

// applyPatch reads the latest version of the object, writes it to version, then attempts to merge
// the changes onto it without conflict. If a conflict occurs jsonmerge.IsConflicting(err) is
// true. The info object is mutated
func applyPatch(delta *jsonmerge.Delta, info *resource.Info, version string) error {
	if err := info.Get(); err != nil {
		return patchError{err}
	}
	obj, err := resource.AsVersionedObject([]*resource.Info{info}, false, version)
	if err != nil {
		return patchError{err}
	}
	data, err := info.Mapping.Codec.Encode(obj)
	if err != nil {
		return patchError{err}
	}
	merged, err := delta.Apply(data)
	if err != nil {
		return patchError{err}
	}
	mergedObj, err := info.Mapping.Codec.Decode(merged)
	if err != nil {
		return patchError{err}
	}
	updated, err := resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, mergedObj)
	if err != nil {
		return err
	}
	info.Refresh(updated, true)
	return nil
}

func (o *DeploymentHookOptions) Run() error {
	infos := o.Infos
	singular := len(o.Infos) <= 1
	if o.Builder != nil {
		loaded, err := o.Builder.Do().IntoSingular(&singular).Infos()
		if err != nil {
			return err
		}
		infos = loaded
	}

	patches := CalculatePatches(infos, o.Encoder, func(info *resource.Info) (bool, error) {
		dc, ok := info.Object.(*deployapi.DeploymentConfig)
		if !ok {
			return false, nil
		}
		updated, err := o.updateDeploymentConfig(dc)
		return updated, err
	})

	if singular && len(patches) == 0 {
		return fmt.Errorf("%s/%s is not a deployment config or does not have an applicable strategy", infos[0].Mapping.Resource, infos[0].Name)
	}

	if o.PrintObject != nil {
		object, err := resource.AsVersionedObject(infos, !singular, o.OutputVersion, kapi.Codecs.LegacyCodec(o.OutputVersion))
		if err != nil {
			return err
		}
		return o.PrintObject(object)
	}

	failed := false
	for _, patch := range patches {
		info := patch.Info
		if patch.Err != nil {
			fmt.Fprintf(o.Err, "error: %s/%s %v\n", info.Mapping.Resource, info.Name, patch.Err)
			continue
		}

		if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
			fmt.Fprintf(o.Err, "info: %s %q was not changed\n", info.Mapping.Resource, info.Name)
			continue
		}

		obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, kapi.StrategicMergePatchType, patch.Patch)
		if err != nil {
			fmt.Fprintf(o.Err, "error: %v\n", err)
			failed = true
			continue
		}

		info.Refresh(obj, true)
		kcmdutil.PrintSuccess(o.Mapper, o.ShortOutput, o.Out, info.Mapping.Resource, info.Name, "updated")
	}
	if failed {
		return cmdutil.ErrExit
	}
	return nil
}

// RunCordonOrUncordon runs either Cordon or Uncordon.  The desired value for
// "Unschedulable" is passed as the first arg.
func (o *DrainOptions) RunCordonOrUncordon(desired bool) error {
	cmdNamespace, _, err := o.factory.DefaultNamespace()
	if err != nil {
		return err
	}

	if o.nodeInfo.Mapping.GroupVersionKind.Kind == "Node" {
		unsched := reflect.ValueOf(o.nodeInfo.Object).Elem().FieldByName("Spec").FieldByName("Unschedulable")
		if unsched.Bool() == desired {
			cmdutil.PrintSuccess(o.mapper, false, o.out, o.nodeInfo.Mapping.Resource, o.nodeInfo.Name, already(desired))
		} else {
			helper := resource.NewHelper(o.client, o.nodeInfo.Mapping)
			unsched.SetBool(desired)
			_, err := helper.Replace(cmdNamespace, o.nodeInfo.Name, true, o.nodeInfo.Object)
			if err != nil {
				return err
			}
			cmdutil.PrintSuccess(o.mapper, false, o.out, o.nodeInfo.Mapping.Resource, o.nodeInfo.Name, changed(desired))
		}
	} else {
		cmdutil.PrintSuccess(o.mapper, false, o.out, o.nodeInfo.Mapping.Resource, o.nodeInfo.Name, "skipped")
	}

	return nil
}

func (o PauseConfig) RunPause() error {
	allErrs := []error{}
	for _, patch := range set.CalculatePatches(o.Infos, o.Encoder, o.Pauser) {
		info := patch.Info
		if patch.Err != nil {
			allErrs = append(allErrs, fmt.Errorf("error: %s %q %v", info.Mapping.Resource, info.Name, patch.Err))
			continue
		}

		if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
			cmdutil.PrintSuccess(o.Mapper, false, o.Out, info.Mapping.Resource, info.Name, false, "already paused")
			continue
		}

		obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, api.StrategicMergePatchType, patch.Patch)
		if err != nil {
			allErrs = append(allErrs, fmt.Errorf("failed to patch: %v", err))
			continue
		}

		info.Refresh(obj, true)
		cmdutil.PrintSuccess(o.Mapper, false, o.Out, info.Mapping.Resource, info.Name, false, "paused")
	}

	return utilerrors.NewAggregate(allErrs)
}

func deleteResource(info *resource.Info, out io.Writer, shortOutput bool, mapper meta.RESTMapper) error {
	if err := resource.NewHelper(info.Client, info.Mapping).Delete(info.Namespace, info.Name); err != nil {
		return cmdutil.AddSourceToErr("deleting", info.Source, err)
	}
	cmdutil.PrintSuccess(mapper, shortOutput, out, info.Mapping.Resource, info.Name, "deleted")
	return nil
}

func encodeAndCreate(info *resource.Info, namespace string, obj runtime.Object) (runtime.Object, error) {
	data, err := info.Mapping.Codec.Encode(obj)
	if err != nil {
		return nil, err
	}
	return resource.NewHelper(info.Client, info.Mapping).Create(namespace, false, data)
}

func (o *TriggersOptions) Run() error {
	infos := o.Infos
	singleItemImplied := len(o.Infos) <= 1
	if o.Builder != nil {
		loaded, err := o.Builder.Do().IntoSingleItemImplied(&singleItemImplied).Infos()
		if err != nil {
			return err
		}
		infos = loaded
	}

	if o.PrintTable && o.PrintObject == nil {
		return o.printTriggers(infos)
	}

	updateTriggerFn := func(triggers *TriggerDefinition) error {
		o.updateTriggers(triggers)
		return nil
	}
	patches := CalculatePatches(infos, o.Encoder, func(info *resource.Info) (bool, error) {
		return UpdateTriggersForObject(info.Object, updateTriggerFn)
	})
	if singleItemImplied && len(patches) == 0 {
		return fmt.Errorf("%s/%s is not a deployment config or build config", infos[0].Mapping.Resource, infos[0].Name)
	}
	if o.PrintObject != nil {
		return o.PrintObject(infos)
	}

	failed := false
	for _, patch := range patches {
		info := patch.Info
		if patch.Err != nil {
			failed = true
			fmt.Fprintf(o.Err, "error: %s/%s %v\n", info.Mapping.Resource, info.Name, patch.Err)
			continue
		}

		if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
			fmt.Fprintf(o.Err, "info: %s %q was not changed\n", info.Mapping.Resource, info.Name)
			continue
		}

		glog.V(4).Infof("Calculated patch %s", patch.Patch)

		obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, kapi.StrategicMergePatchType, patch.Patch)
		if err != nil {
			handlePodUpdateError(o.Err, err, "triggered")
			failed = true
			continue
		}

		info.Refresh(obj, true)
		kcmdutil.PrintSuccess(o.Mapper, o.ShortOutput, o.Out, info.Mapping.Resource, info.Name, false, "updated")
	}
	if failed {
		return cmdutil.ErrExit
	}
	return nil
}

// save invokes the API to alter an object. The reporter passed to this method is the same returned by
// the migration visitor method (for this type, transformImageReferences). It should return an error
// if the input type cannot be saved. It returns migrate.ErrRecalculate if migration should be re-run
// on the provided object.
func (o *MigrateImageReferenceOptions) save(info *resource.Info, reporter migrate.Reporter) error {
	switch t := info.Object.(type) {
	case *imageapi.ImageStream:
		// update status first so that a subsequent spec update won't pull incorrect values
		if reporter.(imageChangeInfo).status {
			updated, err := o.Client.ImageStreams(t.Namespace).UpdateStatus(t)
			if err != nil {
				return migrate.DefaultRetriable(info, err)
			}
			info.Refresh(updated, true)
			return migrate.ErrRecalculate
		}
		if reporter.(imageChangeInfo).spec {
			updated, err := o.Client.ImageStreams(t.Namespace).Update(t)
			if err != nil {
				return migrate.DefaultRetriable(info, err)
			}
			info.Refresh(updated, true)
		}
		return nil
	default:
		if _, err := resource.NewHelper(info.Client, info.Mapping).Replace(info.Namespace, info.Name, false, info.Object); err != nil {
			return migrate.DefaultRetriable(info, err)
		}
	}
	return nil
}

// Run executes the BackendOptions or returns an error.
func (o *BackendsOptions) Run() error {
	infos := o.Infos
	singular := len(o.Infos) <= 1
	if o.Builder != nil {
		loaded, err := o.Builder.Do().IntoSingular(&singular).Infos()
		if err != nil {
			return err
		}
		infos = loaded
	}

	if o.PrintTable && o.PrintObject == nil {
		return o.printBackends(infos)
	}

	patches := CalculatePatches(infos, o.Encoder, func(info *resource.Info) (bool, error) {
		return UpdateBackendsForObject(info.Object, o.Transform.Apply)
	})
	if singular && len(patches) == 0 {
		return fmt.Errorf("%s/%s is not a deployment config or build config", infos[0].Mapping.Resource, infos[0].Name)
	}
	if o.PrintObject != nil {
		object, err := resource.AsVersionedObject(infos, !singular, o.OutputVersion, kapi.Codecs.LegacyCodec(o.OutputVersion))
		if err != nil {
			return err
		}
		return o.PrintObject(object)
	}

	failed := false
	for _, patch := range patches {
		info := patch.Info
		if patch.Err != nil {
			failed = true
			fmt.Fprintf(o.Err, "error: %s/%s %v\n", info.Mapping.Resource, info.Name, patch.Err)
			continue
		}

		if string(patch.Patch) == "{}" || len(patch.Patch) == 0 {
			fmt.Fprintf(o.Err, "info: %s %q was not changed\n", info.Mapping.Resource, info.Name)
			continue
		}

		glog.V(4).Infof("Calculated patch %s", patch.Patch)

		obj, err := resource.NewHelper(info.Client, info.Mapping).Patch(info.Namespace, info.Name, kapi.StrategicMergePatchType, patch.Patch)
		if err != nil {
			handlePodUpdateError(o.Err, err, "altered")
			failed = true
			continue
		}

		info.Refresh(obj, true)
		kcmdutil.PrintSuccess(o.Mapper, o.ShortOutput, o.Out, info.Mapping.Resource, info.Name, false, "updated")
	}
	if failed {
		return cmdutil.ErrExit
	}
	return nil
}