Make console more robust to typos

cmd/tmsp-cli/tmsp-cli.go

@@ -123,6 +123,14 @@ func before(c *cli.Context) error {
 	return nil
 }
 
+// badCmd is called when we invoke with an invalid first argument (just for console for now)
+func badCmd(c *cli.Context, cmd string) {
+	fmt.Println("Unknown command:", cmd)
+	fmt.Println("Please try one of the following:")
+	fmt.Println("")
+	cli.DefaultAppComplete(c)
+}
+
 //--------------------------------------------------------------------------------
 
 func cmdBatch(app *cli.App, c *cli.Context) error {
@@ -149,6 +157,8 @@ func cmdBatch(app *cli.App, c *cli.Context) error {
 }
 
 func cmdConsole(app *cli.App, c *cli.Context) error {
+	// don't hard exit on mistyped commands (eg. check vs check_tx)
+	app.CommandNotFound = badCmd
 	for {
 		fmt.Printf("\n> ")
 		bufReader := bufio.NewReader(os.Stdin)
@@ -162,10 +172,10 @@ func cmdConsole(app *cli.App, c *cli.Context) error {
 		args := []string{"tmsp-cli"}
 		args = append(args, strings.Split(string(line), " ")...)
 		if err := app.Run(args); err != nil {
-			return err
+			// if the command doesn't succeed, inform the user without exiting
+			fmt.Println("Error:", err.Error())
 		}
 	}
-	return nil
 }
 
 // Have the application echo a message