doushio/pipeline.js

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var async = require('async'),
    crypto = require('crypto'),
    deps = require('./deps'),
    etc = require('./etc'),
    fs = require('fs'),
    make_client = require('./make_client'),
    tmp_file = require('tmp').file;

function (cb) {
	var md5 = crypto.createHash('MD5');
	tmp_file({dir: '.build', postfix: '.gen.js'}, function (err, tmp, fd) {
		if (err)
			return cb(err);
		var stream = fs.createWriteStream(null, {fd: fd});
		stream.once('error', cb);
		async.eachSeries(deps.VENDOR_DEPS, function (file, cb) {
			fs.readFile(file, function (err, buf) {
				if (err)
					return cb(err);
				md5.update(buf);
				stream.write(buf);
				md5.update('\n');
				stream.write('\n');
				cb(null);
			});
		}, function (err) {
			if (err)
				return cb(err);
			var hash = md5.digest('hex').slice(0, 10);
			var fnm = 'vendor-' + hash + '.min.js';
			stream.end(function () {
				etc.move(tmp, 'www/js/'+fnm, function (err) {
					if (err)
						return cb(err);
					cb(null, fnm);
				});
			});
		});
	});
}

function commit_assets(metadata, cb) {
	tmp_file({dir: '.build', postfix: '.json'}, function (err, tmp, fd) {
		if (err)
			return cb(err);
		var stream = fs.createWriteStream(null, {fd: fd});
		stream.once('error', cb);
		stream.end(JSON.stringify(metadata) + '\n', function () {
			etc.move(tmp, 'assets.json', cb);
		});
	});
}

function build(cb) {
	etc.checked_mkdir('.build', function (err) {
		if (err) return cb(err);
		build_vendor_js(function (err, vendorjs) {
			if (err)
				return cb(err);

			commit_assets({
				vendor: vendorjs,
			}, cb);
		});
	});
}

if (require.main === module) {
	build(function (err) {
		if (err) throw err;
	});
}