recursive mkdir

mkdir.js

function mkdir(dir, mode, callback) {

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

  if (typeof mode === 'function') {
    callback = mode;
    mode = null;
  }

  mode = mode || 0777;

  dir = path.normalize(dir);
  dir = dir.split(path.sep);

  if (dir[0] == '') {
    dir[0] = path.sep;
  }

  function fs_mkdir(newdir, complete) {

    fs.stat(newdir, function(error, stats) {
      if (!error) {
        return complete(error, newdir)
      }

      fs.mkdir(newdir, mode, function(error) {
        complete(error, newdir)
      })
    });
  }

  fs_mkdir(dir.shift(), function(error, prev_path) {

    if (!dir.length || error) {
      return typeof callback === 'function' && callback(error, prev_path)
    }

    fs_mkdir(path.join(prev_path, dir.shift()), arguments.callee)
  })
}