s3-npm-cache/lib/archive.js

Lightweight runtime to cache NPM dependencies in S3

var tar = require('tar.gz2'),
    fs = require('fs'),
    q = require('q');

var createZip = function (folder, fileName) {
    return tar({ level: 9, memLevel: 9 }).compress(folder, fileName);
};

var unzip = function (fileName, location) {
    return tar().extract(fileName, location);
};

module.exports = {
    createZip: createZip,
    unzip: unzip
};