PHPJS builder in nodejs

phpjs-builder.js

var fs = require("fs");

var dir = __dirname+"/functions";

var mainDirs = [];
var mainFiles = [];

var files = fs.readdirSync(dir);

for(var i in files){
    var fileStats = fs.statSync(dir+"/"+files[i]);
    if(fileStats.isDirectory()){
        mainDirs.push(dir+"/"+files[i]);
    }
}

for(var j in mainDirs){
    var files2 = fs.readdirSync(mainDirs[j]);
    for(var k in files2){
        var currentFile = mainDirs[j]+"/"+files2[k];
        var fileStats2 = fs.statSync(currentFile);
        if(fileStats2.isFile()){
            mainFiles.push({
                id:files2[k].replace(".js","") ,
                file: mainDirs[j]+"/"+files2[k]
            });
        }
    }
}

var compiledFileS = "var PHPJS = {\n";
var compiledFileE = "}";

for(var l in mainFiles){
    compiledFileS += '"'+mainFiles[l].id+'" : ' + fs.readFileSync(mainFiles[l].file);
    if(mainFiles.length-1 != l)
        compiledFileS += ",";
}

compiledFileS += compiledFileE;

fs.writeFileSync(__dirname+"/out.js", compiledFileS );

function doCompress(){
    //npm install node-minify
    
    var compressor = require('node-minify');
    
    // Using UglifyJS for JS
    new compressor.minify({
        type: 'uglifyjs',
        fileIn: __dirname+"/out.js",
        fileOut: __dirname+"/out-min.js",
        callback: function(err){
            console.log(err);
        }
    });
}