/**
* This function generates from the customized bootstrap.less und font-awesome.less a combined css file
*
* @param string|null $writeTo Where to dump the generated file.
*/
public static function generateCombinedBootstrapFontAwesomeCSS($writeTo = null)
{
// Also change build.xml if you change the default writeTo path here!
$writeTo = is_string($writeTo) ? $writeTo : 'src/web/bootstrap-font-awesome.css';
$parser = new \Less_Parser();
$parser->setOptions(array('relativeUrls' => false, 'compress' => true));
$parser->parseFile('src/style/bootstrap-font-awesome.less');
file_put_contents($writeTo, $parser->getCss());
}