ExpressJs Local development server that stream compiles sass, jade and coffeescript

server.coffee

util = require 'util'
path = require 'path'
fs = require 'fs'
require 'string.prototype.endswith'

express = require "express"

compile = require "compile-middleware"

sass = require "node-sass"
coffee = require "coffee-script"
jade = require 'jade'


port = 8000
assetMiddleware =
    js: compile
        src : './src/assets/'
        src_ext : '.coffee'
        headers:
            'content-type': 'application/javascript'
        filename : (request) ->
            request.path.replace ".js", ""
        render : (file, cb, deps) ->
            fs.readFile file, 'utf8', (err, content) ->
                if not err
                    cb null, coffee.compile(content)
                cb err

    css: compile
        src : './src/assets/'
        src_ext : '.scss'
        headers:
            'content-type': 'text/css'
        filename : (request) ->
            request.path.replace ".css", ""
        render : (file, cb, deps) ->
            fs.readFile file, 'utf8', (err, content) ->
                if not err
                    cb null, sass.renderSync(content, { includePaths: [ __dirname + "/src/assets/css", ] })
                cb err

    html: compile
        src : './src/assets/'
        src_ext : '.jade'
        headers:
            'content-type': "text/html"
        filename : (request) ->
            source = request.path.replace ".html", ""
            if source.endsWith '/'
                source += "index"
            source
        render : (file, cb, deps) ->
            fs.readFile file, 'utf8', (err, content) ->
                if not err
                    cb null, jade.compile(content, {})()
                cb err

app = express()

app.set 'views', __dirname + '/src/views'
app.set 'view engine', 'jade'

app.use assetMiddleware.js
app.use assetMiddleware.css
app.use assetMiddleware.html

app.get '/', (req, res) ->
  res.render 'index.jade'

app.use express.static 'src/assets'
app.use express.favicon 'src/assets/img/favicon.png'
app.use express.logger 'dev'

app.listen port

util.puts 'Listening on ' + port + '...'
util.puts 'Press Ctrl + C to stop.'