Code change:
<!-- Please only use this template for submitting enhancement requests --What would you like to be : Why is this needed: Because of is not recommended to create cronjob (with flags) anymore. But there is no imperative command available for to create cronjob. /sig CLI <!-- DO NOT EDIT BELOW THIS LINE --/kind feature
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i wanna work on this. give me several days
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text: <ins> /* Copyright 2018 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package create import ( "fmt" "github.com/spf13/cobra" batchv1 "k8s.io/api/batch/v1" batchv1beta1 "k8s.io/api/batch/v1beta1" corev1 "k8s.io/api/core/v1" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/apimachinery/pkg/runtime" "k8s.io/cli-runtime/pkg/genericclioptions" "k8s.io/cli-runtime/pkg/genericclioptions/resource" batchv1beta1client "k8s.io/client-go/kubernetes/typed/batch/v1beta1" cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util" "k8s.io/kubernetes/pkg/kubectl/scheme" "k8s.io/kubernetes/pkg/kubectl/util/templates" ) var ( cronjobLong = templates.LongDesc(` Create a cronjob with the specified name.`) cronjobExample = templates.Examples(` # Create a cronjob kubectl create cronjob my-job --image=busybox # Create a cronjob with command kubectl create cronjob my-job --image=busybox -- date # Create a cronjob with schedule kubectl create cronjob test-job --image=busybox --schedule="*/1 * * * *"`) ) type CreateCronJobOptions struct { PrintFlags *genericclioptions.PrintFlags PrintObj func(obj runtime.Object) error Name     string Image    string Schedule string Command  []string Restart  string Namespace string Client    batchv1beta1client.BatchV1beta1Interface DryRun    bool Builder   *resource.Builder Cmd       *cobra.Command genericclioptions.IOStreams } func NewCreateCronJobOptions(ioStreams genericclioptions.IOStreams) *CreateCronJobOptions { return &CreateCronJobOptions{ PrintFlags: genericclioptions.NewPrintFlags("created").WithTypeSetter(scheme.Scheme), IOStreams:  ioStreams, } } // NewCmdCreateCronJob is a command to to create CronJobs. func NewCmdCreateCronJob(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *cobra.Command { o := NewCreateCronJobOptions(ioStreams) cmd := &cobra.Command{ Use:     "cronjob NAME --image=image --schedule='0/5 * * * ?' -- [COMMAND] [args...]", Aliases: []string{"cj"}, Short:   cronjobLong, Long:    cronjobLong, Example: cronjobExample, Run: func(cmd *cobra.Command, args []string) { cmdutil.CheckErr(o.Complete(f, cmd, args)) cmdutil.CheckErr(o.Validate()) cmdutil.CheckErr(o.Run()) }, } o.PrintFlags.AddFlags(cmd) cmdutil.AddApplyAnnotationFlags(cmd) cmdutil.AddValidateFlags(cmd) cmdutil.AddDryRunFlag(cmd) cmd.Flags().StringVar(&o.Image, "image", o.Image, "Image name to run.") cmd.Flags().StringVar(&o.Schedule, "schedule", o.Schedule, "A schedule in the Cron format the job should be run with.") cmd.Flags().StringVar(&o.Restart, "restart", o.Restart, "job's restart policy. supported values: OnFailure, Never") return cmd } func (o *CreateCronJobOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []string) error { name, err := NameFromCommandArgs(cmd, args) if err != nil { return err } o.Name = name if len(args) > 1 { o.Command = args[1:] } if len(o.Restart) == 0 { o.Restart = "OnFailure" } clientConfig, err := f.ToRESTConfig() if err != nil { return err } o.Client, err = batchv1beta1client.NewForConfig(clientConfig) if err != nil { return err } o.Namespace, _, err = f.ToRawKubeConfigLoader().Namespace() if err != nil { return err } o.Builder = f.NewBuilder() o.Cmd = cmd o.DryRun = cmdutil.GetDryRunFlag(cmd) if o.DryRun { o.PrintFlags.Complete("%s (dry run)") } printer, err := o.PrintFlags.ToPrinter() if err != nil { return err } o.PrintObj = func(obj runtime.Object) error { return printer.PrintObj(obj, o.Out) } return nil } func (o *CreateCronJobOptions) Validate() error { if len(o.Image) == 0 { return fmt.Errorf("--image must be specified") } if len(o.Schedule) == 0 { return fmt.Errorf("--schedule must be specified") } return nil } func (o *CreateCronJobOptions) Run() error { var cronjob *batchv1beta1.CronJob cronjob = o.createCronJob() if !o.DryRun { var err error cronjob, err = o.Client.CronJobs(o.Namespace).Create(cronjob) if err != nil { return fmt.Errorf("failed to create cronjob: %v", err) } } return o.PrintObj(cronjob) } func (o *CreateCronJobOptions) createCronJob() *batchv1beta1.CronJob { return &batchv1beta1.CronJob{ TypeMeta: metav1.TypeMeta{APIVersion: batchv1beta1.SchemeGroupVersion.String(), Kind: "CronJob"}, ObjectMeta: metav1.ObjectMeta{ Name: o.Name, }, Spec: batchv1beta1.CronJobSpec{ Schedule: o.Schedule, JobTemplate: batchv1beta1.JobTemplateSpec{ ObjectMeta: metav1.ObjectMeta{ Name: o.Name, }, Spec: batchv1.JobSpec{ Template: corev1.PodTemplateSpec{ Spec: corev1.PodSpec{ Containers: []corev1.Container{ { Name:    o.Name, Image:   o.Image, Command: o.Command, }, }, RestartPolicy: corev1.RestartPolicy(o.Restart), }, }, }, }, }, } } </ins>