How to use the do.convert function in do

function errorHandler(error) {
  throw error;
}

var Do = require('do');
// Convert `readFile` from fs to use continuable style.
var fs = Do.convert(require('fs'), ['readFile']);

function safeRead(filename) { return function (callback, errback) {
  fs.readFile(filename)(callback, function (error) {
    if (error.errno === process.ENOENT) {
      callback("");
    } else {
      errback(error);
    }
  })
}}

safeRead(__filename)(console.log, errorHandler);

// Load some libraries
require.paths.unshift(__dirname + "/vendor");
var Haml = require('haml'),
    Markdown = require('markdown'),
    md5 = require('md5').md5,
    Do = require('do'),
    fs = Do.convert(require('fs'), ['readdir', 'stat', 'readFile', 'writeFile']),
    sys = Do.convert(require('sys'), ['exec']);

var ARTICLE_DIR = __dirname + '/data/articles',
    AUTHOR_DIR = __dirname + '/data/authors',
    SKIN_DIR = __dirname + '/data/skin',
    PUBLIC_DIR = __dirname + '/public';

var Filters = {

  // Extends markdown by allowing properties at the top.
  markdown: function (markdown) {
    var match;
    var props = {};
    while(match = markdown.match(/^([a-z]+):\s*(.*)\s*\n/i)) {
      var name = match[1].toLowerCase(),
          value = match[2];

// Load some libraries
require.paths.unshift(__dirname + "/vendor");
var Haml = require('haml'),
    Markdown = require('markdown'),
    md5 = require('md5').md5,
    Do = require('do'),
    fs = Do.convert(require('fs'), ['readdir', 'stat', 'readFile', 'writeFile']),
    sys = Do.convert(require('sys'), ['exec']);

var ARTICLE_DIR = __dirname + '/data/articles',
    AUTHOR_DIR = __dirname + '/data/authors',
    SKIN_DIR = __dirname + '/data/skin',
    PUBLIC_DIR = __dirname + '/public';

var Filters = {

  // Extends markdown by allowing properties at the top.
  markdown: function (markdown) {
    var match;
    var props = {};
    while(match = markdown.match(/^([a-z]+):\s*(.*)\s*\n/i)) {
      var name = match[1].toLowerCase(),
          value = match[2];
      markdown = markdown.substr(match[0].length);

function errorHandler(error) {
  throw error;
}

var Do = require('do');
var fs = Do.convert(require('fs'), ['readdir', 'stat', 'readFile']);

// Checks the `stat` of a file path and outputs the file contents if it's
// a real file
function loadFile(path, callback, errback) {
  fs.stat(path)(function (stat) {
    
    // Output undefined when the path isn't a regular file
    if (!stat.isFile()) {
      callback();
      return;
    }

    // Pass through the read to regular files as is.
    fs.readFile(path, 'utf8')(callback, errback)

  }, errback);