check sublime custom install packages

gistfile1.txt

var fs = require('fs');

var _temp = [fs.readdirSync('Packages'),
             fs.readdirSync('Pristine Packages')]
_temp[1] = _temp[1].map(function( line ) {
  return line.replace(/\.sublime-package$/,'');
});
var _   = require('underscore');
var ret = _.without.apply(null, ( _temp[1].splice(0,0,_temp[0]), _temp[1] ) );

console.log( ret );