koa-bundle

Generic asset pipeline with caching, etags, minification, gzipping and sourcemaps.

The child of node-enchilada and static-cache.

Examples

• Browserify (with a callback and options)

var bundle = Bundle({ debug: true, root: __dirname) }, function(file, fn) {
  Browserify({ debug: file.debug })
    .add(file.path)
    .transform(require('babelify'))
    .bundle(fn);
}))
app.use(bundle('app.js'));

• Duo (using generators)

var bundle = Bundle(function *(file) {
  return yield Duo(file.root)
    .entry(file.path)
    .use(require('duo-sass')())
    .run();
})
app.use(bundle('app.css'));

• Gulp (using currying and globbing)

var bundle = Bundler({ root: __dirname }, function(file, fn) {
  var gulp = Gulp.src(file.path, { cwd: file.root });

  if ('styl' == file.type) {
    gulp.pipe(styl())
      .on('error', fn);
  }

  gulp.pipe(myth())
    .on('error', fn)

  if ('production' == process.env.NODE_ENV) {
    gulp
      .pipe(csso())
      .on('error', fn);
  }

  gulp.on('end', fn);
});

// ... in another file, single middleware
app.use(bundle());

// multiple endpoints
bundle('app.styl');
bundle('app.js');

Installation

npm install koa-bundle

API

bundle(settings, handler) => bundler([path]) => middleware

bundle(handler)(glob) => bundler([path]) => middleware

Create a bundler with an optional set of settings and a handler.

A handler can be a synchronous function, asynchronous function, generator or promise. The handler passes a File object that has the following properties:

var File = {
  type: "js",
  src: "... JS ...",
  path: "dashboard.js",
  root: "/Users/Matt/Projects/..."
  minify: true,
  debug: false,
  cache: true,
  gzip: true,
}

The available settings are:

• debug: enables sourcemaps
• minify: minify JS and CSS
• cache: cache responses across requests and add etags
• gzip: gzip the response if it's supported

The default settings depend on the environment (NODE_ENV):

• Production:

  • debug: false
  • minify: true
  • cache: true
  • gzip: true

• Development:

  • debug: true
  • minify: false
  • cache: false
  • gzip: false

The bundler returns a function that you can then pass a path into:

var bundle = Bundler(settings, handler);
app.use(bundle('app.js'));

The path is relative to settings.root or process.cwd(). The script[src] and link[href] is relative the root specified.

TODO

• Warmup cache in production
• More examples
• Testing

Credits

• node-enchilada and browserify-middleware for some ideas and general design.
• static-cache for the caching, etagging and gzipping.
• sponsored by Lapwing Labs.

License

MIT

Copyright (c) 2015 Matthew Mueller <[email protected]>