fetch_modules

#!/usr/bin/env node
var fs = require('fs')
var http = require('http')
var path = require('path')
var url = require('url')
var es = require('esprima')
var estraverse = require('estraverse')
var mkdirp = require('mkdirp')

var base = process.argv[2]

function readFile(base) {

 try {
 var code = fs.readFileSync(base).toString()

 estraverse.traverse(es.parse(code), {
 enter: function (node, parent) {
 if (node.type == 'VariableDeclarator' && node.init.callee.name == 'require') {

 var p = node.init.arguments[0].value
 var match = p.indexOf(':') > -1

 if (match) {

 var origin = url.parse(p)
 var fullpath = path.join(__dirname, '/node_modules', origin.hostname, origin.pathname)
 var dirname = path.dirname(fullpath)
 var filename = path.basename(fullpath)

 mkdirp.sync(dirname)

 var writestream = fs.createWriteStream(fullpath)

 var req = http.request(url.parse(p), function(res) {
 res.setEncoding('utf8')
 res.pipe(writestream)
 })

 req.on('error', function(e) {
 console.log('problem getting module: ' + e.message);
 })

 req.end()

 }
 else {
 readFile(path.resolve(p) + '.js')
 }
 } 
 }
 })

 } catch($) { return }
}

readFile(base)