Symfony Assetic Merge all files in one - php

Question

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

Answer 1

I don't think Assetic does what you are wanting it to do.
I think the easiest way to get those into the one file would be to just include the parent file in your stylesheets list and override the parent block like..
**index.html.twig extends base.html.twig**
{% block stylesheets %}
{% stylesheets filter='cssrewrite,uglifycss' output='css/compiled/main.css'
'bundles/sscore/bootstrap/css/bootstrap.css'
'bundles/sscore/main.css'
%}
<link rel="stylesheet" href="{{ asset_url }}"/>
{% endstylesheets %}
{% endblock %}

Answer 2

you can use scssphp , but you will need to install (scssphp) for that.
{% stylesheets filter="scssphp" output="styles/css/default_g.css"
"https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.4/jquery-ui.css"
"styles/css/myfileone.css"
"styles/css/myfileone2.css"
"styles/css/main.css"
"styles/css/myfile.css"
%}
<link rel="stylesheet" href="{{ asset('styles/css/default_g.css') }}" />
{% endstylesheets %}