const _ = require('lodash')
const yaml = require('js-yaml')
const fs = require('fs');

const dotPaths = [...]
const cfg = {}

_.each(dotPaths, function(path) {
  _.set(cfg, path, path)
});

fs.writeFile('mongod.conf', yaml.safeDump(cfg), (err) => {
  if (err) throw err;
  console.log('mongod.conf saved.')
});