scan.js

var fs = require('fs');
var path = require('path');

fs.readFileSync('.jshintignore', {encoding: 'UTF-8'}).split('\n').forEach(function(line) {
  if (line && line.indexOf('.js') !== -1) {
    if (!fs.existsSync(path.join(process.cwd(), line))) {
      console.log('> ' + line);
    }
  }
});