node-writing-stream.js

var fs = require("fs");
var mkdirp = require("mkdirp");
var path = require("path");

function fileStream(dest) {
  mkdirp.sync(path.dirname(dest));
  return fs.createWriteStream(dest);
}

var writableStream = fileStream("./somecontent.js");
writableStream.write("test");