bundle-admin-maid.js

module.exports = function(maid) {

  maid.files('js', ['**/*.js'])

  maid.files('stylus', ['public/css/**/*.styl'])

  maid('test', function(done) {
    maid.exec('@./node_modules/.bin/mocha -r should -R spec', done)
  })

  maid('lint', function(done) {
    maid.exec('jshint lib test', done)
  })

  maid('qa', 'test', 'lint')

  maid('buildCss', function(done) {
    processStylus(
      { src: 'public/css/screen.styl'
      , dest: 'public/css/screen.css'
      }, done)
  })

  //  This would run forever
  maid('watch', function() {

    maid.watch(
      maid.files('stylus'),
      maid.task.buildCss)

    maid.watch(
      maid.files('js'),
      [ maid.task.lint, maid.task.test ]) // Run both tasks if anything changes
  })
}

bundle-admin-processors-stylus.js

var stylus = require('stylus')
  , nib = require('nib')
  , fs = require('fs')

module.exports = function processStylus(input, cb) {

  fs.readFile(input.src, function (err, data) {

    if (err) {
      return cb(err)
    }

    stylus
      .use(nib())
      .set('compress', true)
      .set('more options', { foo: 1 })
      .define('my function', function () { /* ... */ })
      .compile(data, function (err) {
        if (err) {
          return cb(err)
        }
        fs.writeFile(input.dest, function (err) {
          if (err) {
            return cb(err)
          }
          cb(null, 'yay')
        })
      })
  })
}

maid.js

// global maid.js
var bundles = require('bundles.json')

module.exports = function (maid) {
  maid.loadTasks('./bundles/**/maid.js')

  // or if order is important

  // Try to load a build script for all of
  // the bundles specified in bundles.json
  bundles.forEach(function (bundle) {
    
    try {
      maid.load(require(bundle + '/maid'))
    } catch (e) {
      // No build script for bundle
    }

  })

  // This would run all buildCss across all bundles then run all buildJavascript
  // across all bundles
  maid('build', 'buildCss', 'buildJavascript')
  
}