Postcss filter

This is a fork of assetic-autoprefixer.

All credits goes to assetic-autoprefixer.

The original assetic-autoprefixer implements only the autoprefixer postcss module.

This fork adds a cssnext filter for the PHP assetic framework. The project is called Postcss as it could implement each postcss module and let you choose which one to use. As I am new with postcss I am starting with cssnext which is made of (many postcss modules)[http://cssnext.io/usage/] (including autoprefixed) and make it a good start.

Requirements

kriswallsmith/assetic is required to be installed in your php project. postcss/cssnext is required to be installed on your system.

Install kriswallsmith/assetic with composer

php composer.phar require kriswallsmith/assetic ~1.0

Install cssnext globally on your system

sudo npm install -g cssnext

Install cssnext locally on your system

npm install cssnext

Usage in PHP

use Bit3\Assetic\Filter\Postcss\CssnextFilter;

// if you have installed cssnext globally
$cssnextBinary = '/usr/bin/cssnext';

// if you have installed cssnext locally
$cssnextBinary = '/../node_modules/.bin/cssnext';

$cssnextFilter = new CssnextFilter($cssnextBinary);

// if node.js binary is not installed as /usr/bin/node
// (e.g. on debian/ubuntu the binary is named /usr/bin/nodejs)
$cssnextFilter->setNodeBin('/usr/bin/nodejs');

Usage in Symfony2

This project comes with a assetic filter configuration file, located in the config directory.

Define the cssnext binary path in the parameters.yml:

parameters:
  # if you have installed cssnext globally
  assetic.cssnext.bin: /usr/bin/cssnext

  # if you have installed cssnext locally
  assetic.cssnext.bin: %kernel.root_dir%/../node_modules/.bin/cssnext

  # if node.js binary is not installed as /usr/bin/node
  # (e.g. on debian/ubuntu the binary is named /usr/bin/nodejs)
  assetic.node.bin: /usr/bin/nodejs

Then enable the filter in the assetic configuration chapter:

# Assetic Configuration
assetic:
    filters:
        cssnext:
          resource: "%kernel.root_dir%/../vendor/netzmacht/assetic-postcss/config/cssnext.xml"
          # if you like, you can use apply_to here :-)
          # e.g, apply_to: "\.css"
          # otherwise you use the filter in your template with filter="cssnext"