title: Symfony Assetic Merge all files in one
body: <p>Is there any ways, to merge all <strong>*.css files</strong> for example, from many layouts in one, using native <code>Symfony Assitic Manager</code>.</p>
  
  <p><strong>Example:</strong></p>
  
  <pre><code>**base.html.twig**    
  {% block stylesheets %}
        {% stylesheets   filter='cssrewrite,uglifycss' output='css/compiled/main.css'
        'bundles/sscore/bootstrap/css/bootstrap.css' %}
        &lt;link rel="stylesheet" href="{{ asset_url }}"/&gt;
        {% endstylesheets %}
  {% endblock %}
  
  **index.html.twig extends base.html.twig**    
  {% block stylesheets %}
  
        {{ parent() }}
  
        {% stylesheets   filter='cssrewrite,uglifycss' output='css/compiled/main.css'
        'bundles/sscore/main.css' %}
        &lt;link rel="stylesheet" href="{{ asset_url }}"/&gt;
        {% endstylesheets %}
  {% endblock %}
  </code></pre>
  
  <p>In prod env this example gives me two files, but i want one meged?</p>