index.js

#!/usr/bin/env node
var electron = require('electron');
var proc = require('child_process');
var watch = require('watch');
var fs = require('fs');

var child;
child = proc.spawn(electron,process.argv.slice(2, process.argc));
const readline = require('readline');

var settings = (fs.existsSync('./.electromonrc')?fs.readFileSync('./.electromonrc','utf-8'):'');
 watch.watchTree('.',{ignoreDotFiles:true}, function (f, curr, prev) {
    if (typeof f == 'object' && prev === null && curr === null) {
      // Finished walking the tree
    } else{
        if(settings!='') {
          if(RegExp(settings.replace(/\n/g,'')).test(f)==false){
            debounce(restart(),500);
          }
        }
        else {
          debounce(restart(),500);
        }
    }
  });

child.stdout.pipe(process.stdout);

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

console.log('Starting Electron App @ ' + process.cwd());

rl.on('line', (cmd) => {
  if(cmd == 'rs'){
    restart();
  }
});
rl.on('SIGINT', (cmd) => {
    console.log('Shutting Down Electron');
    child.stdin.pause();
    child.kill();
    process.exit();
})
function restart(){
    console.log('Restarting');
    child.stdin.pause();
    child.kill();
      child = proc.spawn(electron,process.argv.slice(2, process.argc));
    settings = (fs.existsSync('./.electromonrc')?fs.readFileSync('./.electromonrc','utf-8'):'');
    child.stdout.pipe(process.stdout);
}

function debounce(func, wait, immediate) {
	var timeout;
	return function() {
		var context = this, args = arguments;
		var later = function() {
			timeout = null;
			if (!immediate) func.apply(context, args);
		};
		var callNow = immediate && !timeout;
		clearTimeout(timeout);
		timeout = setTimeout(later, wait);
		if (callNow) func.apply(context, args);
	};
};
// One-liner for current directory, ignores .dotfiles