title: Coffeescript watch src directory to compile
body: <p>I am doing this -</p>
  
  <p><code>$ coffee -c assets/js</code></p>
  
  <p>To compile all .coffee files into .js files in that directory. But i don't understand how I can watch the directory ?</p>
  
  <p>I try this but get error -</p>
  
  <pre><code>$ coffee -wc assets/js
  
  /usr/lib/node_modules/coffee-script/lib/coffee-script/command.js:287
        if (e.code !== 'ENOENT') throw e;
                                       ^
  Error: watch EMFILE
      at errnoException (fs.js:648:11)
      at FSWatcher.start (fs.js:676:11)
      at Object.watch (fs.js:704:11)
      at /usr/lib/node_modules/coffee-script/lib/coffee-script/command.js:256:27
      at Object.oncomplete (/usr/lib/node_modules/coffee-script/lib/coffee-script/command.js:85:25)
  </code></pre>
  
  <p>Any help will be greatly appreciated!</p>