优化error输出

cmd/saastool/main.go

@@ -7,6 +7,7 @@ import (
 
 func main() {
 	if err := Run(os.Args[1:]...); err != nil {
+		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}
 }
@@ -45,8 +46,6 @@ func Run(args ...string) error {
 	case "daemon":
 		return RunDaemon(args...)
 	default:
-		err := fmt.Errorf(`unknown command "%v"`+"\n"+`Run 'saastool help' for usage`, name)
-		fmt.Fprintln(os.Stderr, err.Error())
-		return err
+		return fmt.Errorf(`Unknown command "%v"`+"\n"+`Run 'saastool help' for usage`, name)
 	}
 }