Recursively iterate through folders to document image assets

gistfile1.js

#!/usr/bin/env node
var fs = require('fs')
  , util = require('util')
  , path = require('path');
var total = 0;

/**
 *
 * Iterate through the filesystem and create a file that documents assets created
 *
 */
function processDir(dir, done) {
  var assets = [];

  fs.readdir(dir, function(err, files){
    if( err ) throw err;

    var pending = files.length;
    total += files.length;

    if(!pending) done(null, assets);

    files.forEach(function(file) { 

      fs.stat(path.join(dir, file), function( err, stat ) {
        if( err ) console.log(err);

        if( stat && stat.isDirectory() && file != 'node_modules' ) {
          processDir(path.join(dir, file), function(err, results){
            assets = assets.concat(results);
            if(!--pending) { done(null, assets); }
          });
        }
        else{
          if( /\.(png|jpg|gif)/.test(file) ) assets.push(file);
          if(!--pending) { done(null, assets); }
        }
      });
    });
  });
}

var start = process.hrtime();
processDir(__dirname, function( err, results) {
  var diff = process.hrtime(start);
  var ms = (diff[0] * 1e9 + diff[1]) * 1e-6;
  console.log("Total number of assets produced:", results.length);
  console.log("Total number of items checked:", total);
  console.log("Total execution time: %dms", ms );
  fs.writeFile('results.txt', results.join('\n'));
});