import "github.com/abiosoft/ishell"

func main(){
    // create new shell.
    shell := ishell.NewShell()

	// display welcome info.
	shell.Println("Sample Interactive Shell")

	// register a function for "greet" command.
    shell.Register("greet", func(cmd string, args []string) (string, error) {
        name := "Stranger"
        if len(args) > 0 {
            name = strings.Join(args, " ")
        }
		return "Hello "+name, nil
	})

    // register a function for "exit" command.
	shell.Register("exit", func(cmd string, args []string) (string, error) {
		shell.Stop()
		return "bye!", nil
	})

	// start shell
	shell.Start()
}

// simulate an authentication
shell.Register("login", func(cmd string, args []string) (string, error) {
    // get username
	shell.Println("Username:")
	username, _ := shell.ReadLine()

    // get password. Does not echo characters.
	shell.Println("Password:")
	password := shell.ReadPassword(false)

	... // do something with username and password

    return "Authentication Successful.", nil
})