app.js

/***
 *
 *
 *
 */
var vm = require('vm');
var events = require('events');
var util = require('util');
var fs = require('fs');
var npm = require('npm');
var Evn = require('./evn');


var App = module.exports = function(options) {
    this._requireCache = {};


    this.__Modules = options.modules;
    this.__Main = options.enter;
    this.__dirname = options.__dirname;

    this.options = options;

    events.EventEmitter.call(this);
    this.initEvn(new Evn(options, this));

};
/**
 * Inherits from EventEmitter
 */
util.inherits(App, events.EventEmitter);

App.prototype.wrapper = ['(function (evn) { ', '\n});'];

App.prototype.initEvn = function(evn) {
    this.evn = evn;
};

App.prototype.wrap = function(script) {
    return this.wrapper[0] + script + this.wrapper[1];
};
App.prototype.compile = function(source) {
    var self = this;

    if(!source) {
        return this.installDeps(function() {
            self.compile(self.__Modules[self.__Main])
        })
    }
    source = this.wrap(source);
    var fn = vm.runInThisContext(source, this.filename, true);
    var evn = this.evn;
    try {

        fn(this.evn || {});
        this.emit('compiled');

    } catch(err) {

        this.emit('app_error', err);
    }
};
App.prototype.compileModule = function(source, evn, filename) {
    var self = this;

    var source = this.wrap(source);
    var fn = vm.runInThisContext(source, filename || this.filename, true);
    try {
        fn(evn || this.evn || {});
        this.emit('compiled', fn);

    } catch(err) {

        this.emit('app_error', err);
    }
};
App.prototype.installDeps = function(callBack) {
    var self = this;

    npm.load(this.options, function(err) {
        if(err)
            return callBack(err);
        var deps = Object.keys(self.options.dependencies);
        npm.commands.install(self.__dirname, deps, function(err) {
            if(err) {
                return callBack(err);
            }
            callBack(null, deps);
        });
    });
};