piping from getit, via zlib and untarring

gistfile1.js

    out('!{grey}retrieving recipes from !{grey,underline}{0}', target);
    getit(target)
        .on('end', out.bind(null, '!{grey}extracting recipes'))
        .pipe(zlib.Gunzip())
        .pipe(tar.Parse({ path: opts.bakery }))
        .on('entry', function(entry) {
            if (reLibrary.test(entry.path) && entry.type == 'File') {
                promises.push(extractEntry(entry));
            }
        })
        .on('end', function() {
            when.all(promises, function() {
                out('!{check,green} done');
                if (callback) {
                    callback();
                }
            });
        });