Node: Recurse through a directory and upload files to s3, using async, knox, underscore

gistfile1.js

// recurse through tempdir and upload all files
        (function uploadFile(filepath, callback){
          fs.stat(filepath, function(err, stats){
            if(err) return callback(err);
            else{
              if(stats.isDirectory()){
                fs.readdir(filepath, function(err, files){
                  var files = _.map(files, function(file){ return path.join(filepath, file) });
                  async.each(files, uploadFile, callback);
                });
              }else{
                var destination = filepath.replace(basePath,'');
                if(destination[0] !== '/') destination = ('/' + destination);
                client.putFile(filepath, destination, callback);
              }
            }
          });
        })(basePath, callback);  

In this example also in an async chain, hence the callback on 18