feat: scope help printer to root command run

cmd/goyco/cli.go

@@ -69,6 +69,7 @@ func printRunUsage() {
 func buildRootCommand(cfg *config.Config) *cli.Command {
 	helpPrinterOnce.Do(func() {
 		defaultHelpPrinter = cli.HelpPrinter
+	})
 	cli.HelpPrinter = func(w io.Writer, templ string, data interface{}) {
 		if cmd, ok := data.(*cli.Command); ok && cmd.Root() == cmd {
 			printRootUsage()
@@ -76,7 +77,6 @@ func buildRootCommand(cfg *config.Config) *cli.Command {
 		}
 		defaultHelpPrinter(w, templ, data)
 	}
-	})
 
 	root := &cli.Command{
 		Name:        "goyco",
@@ -94,6 +94,10 @@ func buildRootCommand(cfg *config.Config) *cli.Command {
 			commands.SetJSONOutput(cmd.Bool("json"))
 			return ctx, nil
 		},
+		After: func(ctx context.Context, cmd *cli.Command) error {
+			cli.HelpPrinter = defaultHelpPrinter
+			return nil
+		},
 		Action: func(_ context.Context, cmd *cli.Command) error {
 			if cmd.NArg() == 0 {
 				printRootUsage()

cmd/goyco/cli_test.go

@@ -132,7 +132,7 @@ func TestPrintRunUsage(t *testing.T) {
 	printRunUsage()
 }
 
-func TestDispatchCommand(t *testing.T) {
+func TestRootCommandDispatch(t *testing.T) {
 	t.Run("unknown command", func(t *testing.T) {
 		cfg := testutils.NewTestConfig()
 		cmd := buildRootCommand(cfg)