feat: add sub-command options to print support global flags

cmd/kubevpn/cmds/options.go

@@ -0,0 +1,33 @@
+package cmds
+
+import (
+	"os"
+
+	"github.com/spf13/cobra"
+	cmdutil "k8s.io/kubectl/pkg/cmd/util"
+	"k8s.io/kubectl/pkg/util/i18n"
+	"k8s.io/kubectl/pkg/util/templates"
+)
+
+var (
+	optionsExample = templates.Examples(i18n.T(`
+		# Print flags inherited by all commands
+		kubectl options`))
+)
+
+func CmdOptions(cmdutil.Factory) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "options",
+		Short:   i18n.T("Print the list of flags inherited by all commands"),
+		Long:    i18n.T("Print the list of flags inherited by all commands"),
+		Example: optionsExample,
+		Run: func(cmd *cobra.Command, args []string) {
+			cmd.Usage()
+		},
+	}
+
+	cmd.SetOut(os.Stdout)
+
+	templates.UseOptionsTemplates(cmd)
+	return cmd
+}

cmd/kubevpn/cmds/root.go

@@ -4,13 +4,17 @@ import (
 	"github.com/spf13/cobra"
 	"k8s.io/cli-runtime/pkg/genericclioptions"
 	cmdutil "k8s.io/kubectl/pkg/cmd/util"
+	"k8s.io/kubectl/pkg/util/i18n"
+	"k8s.io/kubectl/pkg/util/templates"
 )
 
 func NewKubeVPNCommand() *cobra.Command {
 	var cmd = &cobra.Command{
 		Use:   "kubevpn",
-		Short: "kubevpn",
-		Long:  `kubevpn`,
+		Short: i18n.T("kubevpn connect to Kubernetes cluster network"),
+		Long: templates.LongDesc(`
+      kubevpn connect to Kubernetes cluster network.
+      `),
 	}
 
 	flags := cmd.PersistentFlags()
@@ -20,12 +24,27 @@ func NewKubeVPNCommand() *cobra.Command {
 	matchVersionFlags.AddFlags(flags)
 	factory := cmdutil.NewFactory(matchVersionFlags)
 
-	cmd.AddCommand(CmdConnect(factory))
-	cmd.AddCommand(CmdReset(factory))
-	cmd.AddCommand(CmdControlPlane(factory))
-	cmd.AddCommand(CmdServe(factory))
-	cmd.AddCommand(CmdUpgrade(factory))
-	cmd.AddCommand(CmdWebhook(factory))
-	cmd.AddCommand(CmdVersion(factory))
+	groups := templates.CommandGroups{
+		{
+			Message: "Client Commands:",
+			Commands: []*cobra.Command{
+				CmdConnect(factory),
+				CmdReset(factory),
+				CmdUpgrade(factory),
+				CmdVersion(factory),
+				CmdOptions(factory),
+			},
+		},
+		{
+			Message: "Server Commands (DO NOT USE IT !!!):",
+			Commands: []*cobra.Command{
+				CmdControlPlane(factory),
+				CmdServe(factory),
+				CmdWebhook(factory),
+			},
+		},
+	}
+	groups.Add(cmd)
+	templates.ActsAsRootCommand(cmd, []string{"options"}, groups...)
 	return cmd
 }