Basic use of a custom REPL in Node

gistfile1.js

'use strict';
var repl                = require('repl'),
    pkg                 = require('../package.json');

var r = repl.start({
    prompt: pkg.name + ' >',
    input : process.stdin,
    output: process.stdout
});

r.context.howdy = function(){ console.log('Howdy');

r.on('exit', process.exit);