how to auto restart electron browser process upon file changes

monelectron.js

#!/usr/bin/env node

require('babel-register');

const electron = require('electron-prebuilt');
const proc = require('child_process');
const sleep = require('sleep');

const RxNode = require('rx-node');
const Rx = require('rx');
const fs = require('fs');

const chokidar = require('chokidar');
const readline = require('readline');
const {curry, append, remove, compose, replace, prop, map} = require('ramda');

var log = console.log.bind(console);

var fileWatcher = chokidar.watch('./src/browser', { ignored: /[\/\\]\./, persistent: true });
const rl = readline.createInterface({ input: process.stdin, output: process.stdout });

var restart = compose(start, stop, sleep.sleep);
var closeShop = compose(terminateApp, stop);

fileWatcher.on('raw', function(event, path, details) { restart(1); });
RxNode.fromReadLineStream(rl).subscribe((cmd) => { if (cmd === 'rs') {restart(0);} });

rl.on('SIGINT', (cmd) => closeShop());

var child;

function stop() {
  console.log('Stopping app');
  child.removeListener('exit', closeShop);
  child.stdin.pause();
  child.kill();
}

function start() {
  console.log('');
  console.log('v'.repeat(80));
  console.log('Starting Electron App @ ' + proc.execSync('pwd',{encoding:'utf-8'}));
  child = proc.spawn(electron,['.']);
  child.stdout.pipe(process.stdout);
  child.on('exit', closeShop);
}

function terminateApp() {
  process.exit();
}

start();