var pacman = function(name, spec, cb) {
var cache_dir = path.join(osenv.home(), '.npminstall');
// TODO never cache '*' items
// lookup latest version for * in registry?
// cache ~##.##.## without the loading ~
// This allows for exact pinned versions and ~ versions that match
// to hit the same cache item
if (spec && /^~\d+[.]\d+[.]\d+$/.test(spec)) {
spec = spec.replace('~', '');
}
if (!fs.existsSync(cache_dir)) {
fs.mkdirSync(cache_dir);
}
var key = crypto.createHash('md5')
.update(name).update(spec)
.digest('hex');
var tarfile = path.join(cache_dir, key + '.tar.gz');
if (fs.existsSync(tarfile)) {
return cb(null, tarfile);
}
fetch(name, spec, {})
.syphon(barrage(fs.createWriteStream(tarfile)))
.wait(function(err) {
cb(err, tarfile);
});
}
return new Promise(function (resolve, reject) {
npm(name, spec)
.on('error', reject)
.pipe(unpack(dest, function (err) {
if (err) reject(err);
else resolve(dest);
}))
}).then(function () {
step('download codemirror', function (callback) {
if (!completedCleanup) throw new Error('skipped because cleanup was unsucessful');
npm('codemirror', '*').pipe(unpack(__dirname + '/src', callback));
completedDownload = true;
}, '60 seconds');
step('cleanup', function (callback) {
rimraf(__dirname + '/src');
rimraf(__dirname + '/lib');
mkdirp(__dirname + '/lib');
npm('codemirror', '*').pipe(unpack(__dirname + '/src', callback));
}, '60 seconds');
step('download', function (callback) {
npm('codemirror', '*').pipe(unpack(__dirname + '/src', callback));
}, '60 seconds');