Add shell completion

main.go

@@ -18,6 +18,7 @@ func main() {
 		cmds.NewCertCommand(),
 		cmds.NewSecretsEncryptCommand(),
 		cmds.NewTokenCommand(),
+		cmds.NewCompletionCommand(),
 	}
 
 	if err := app.Run(configfilearg.MustParse(os.Args)); err != nil {

pkg/cli/cmds/cmds_test.go

@@ -20,6 +20,7 @@ func Test_NewCommands(t *testing.T) {
 		NewCertCommand(),
 		NewSecretsEncryptCommand(),
 		NewTokenCommand(),
+		NewCompletionCommand(),
 	}
 
 	for _, command := range app.Commands {

pkg/cli/cmds/completion.go

@@ -0,0 +1,18 @@
+package cmds
+
+import (
+	"github.com/k3s-io/k3s/pkg/cli/cmds"
+	"github.com/k3s-io/k3s/pkg/cli/completion"
+	"github.com/urfave/cli"
+)
+
+var (
+	k3sCompletionBase = mustCmdFromK3S(cmds.NewCompletionCommand(completion.Run), K3SFlagSet{
+		"i": copyFlag,
+	})
+)
+
+func NewCompletionCommand() cli.Command {
+	cmd := k3sCompletionBase
+	return cmd
+}

pkg/cli/cmds/root.go

@@ -232,6 +232,7 @@ func validateCloudProviderName(clx *cli.Context, role CLIRole) {
 func NewApp() *cli.App {
 	app := cli.NewApp()
 	app.Name = appName
+	app.EnableBashCompletion = true
 	app.Usage = "Rancher Kubernetes Engine 2"
 	app.Version = fmt.Sprintf("%s (%s)", version.Version, version.GitCommit)
 	cli.VersionPrinter = func(c *cli.Context) {