jade.js

var fs = require('fs');
var jade = require('jade');
var _ = require('lodash');
var async = require('async');

exports.generate = function (arr) {
    var fn = jade.compileFile('./template/seed1.jade', {pretty: true});
    var chapterFn = jade.compileFile('./template/seed2.jade', {pretty: true});
    var topicFn = jade.compileFile('./template/seed3.jade', {pretty: true});

    async.parallel([
        function(cb){
            async.each(arr[0],
                function (item, callback) {
                    fs.writeFile("./out/" + item.activity + '.html', fn(item), callback);
                }, function (err) {
                    console.log("done videos." + (err | ''));
                    cb(null, 'videos');
                }
            );
        },
        function(cb){
            async.each(arr[1],
                function (item, callback) {
                    fs.writeFile("./out/root/index.html, fn(item), callback);
                }, function (err) {
                    console.log("done videos." + (err | ''));
                    cb(null, 'videos');
                }
            );
        }
    ], function(){});

};