requirejs wrapper for file directory in / out

wrapRequreJS.js

var fs = require("fs");
var inPath = __dirname + "/in";
var outPath = __dirname + "/out";

fs.readdir(inPath, function(err, files) {
    if (err) throw err;
    for (var i in files) {
        fs.readFile(inPath + "/" +files[i], doWrap(files[i]));
    }
});

function doWrap(file) {
    return function(err, data) {
        if (err) throw err;

        fs.writeFile(outPath+"/"+file,'define(function(require, exports, module) { ' + data + ' });' , function(err) {
            if (err) throw err;
            console.log(file+' saved!');
        });

    };
}