DustJS templates compiler into single file

gistfile1.js

var
  path = require("path"),
  fs = require("fs"),

  dust_path = path.join(__dirname, "/lib/dust"),
  tpls_path = path.join(__dirname, "../js/app"),

  parser = require(path.join(dust_path, "/parser")),
  compiler = require(path.join(dust_path, "/compiler")),

  tpls = [],
  compiled = "",
  compiled_file = path.join(__dirname, "../js/templates.build.js");

compiler.parse = parser.parse;

function walk(filename, callback)
{
  fs.stat(filename, function(err, stats)
  {
    if (stats.isFile() && filename.match(/\.js$/)) {
      // Filename - do callback
      callback(filename);
    } else if (stats.isDirectory()) {
      // Directory - walk recursive
      fs.readdir(filename, function(err, files)
      {
        for (var i = 0; i < files.length; i++) {
          walk(filename + '/' + files[i], callback);
        }
      });
    }
  });
}

var traverseFileSystem = function(currentPath)
{
  var files = fs.readdirSync(currentPath);
  for (var i in files) {
    var currentFile = currentPath + '/' + files[i];
    var stats = fs.statSync(currentFile);
    if (stats.isFile()) {
      if (path.extname(currentFile) === ".html") {
        tpls.push(currentFile);
      }

    }
    else if (stats.isDirectory()) {
      traverseFileSystem(currentFile);
    }
  }
};

traverseFileSystem(tpls_path);

tpls.forEach(function(file)
             {
               var name = path.basename(file, ".html");

               tpl = fs.readFileSync(file, "utf-8");

               compiled += compiler.compile(tpl, name) + "\n";

               console.log("processed " + name);

             });

fs.writeFileSync(compiled_file, compiled);