/**
* Returns LESS compiler set up for use with MediaWiki
*
* @since 1.22
* @since 1.26 added $extraVars parameter
* @param Config $config
* @param array $extraVars Associative array of extra (i.e., other than the
* globally-configured ones) that should be used for compilation.
* @throws MWException
* @return Less_Parser
*/
public static function getLessCompiler(Config $config, $extraVars = array())
{
// When called from the installer, it is possible that a required PHP extension
// is missing (at least for now; see bug 47564). If this is the case, throw an
// exception (caught by the installer) to prevent a fatal error later on.
if (!class_exists('Less_Parser')) {
throw new MWException('MediaWiki requires the less.php parser');
}
$parser = new Less_Parser();
$parser->ModifyVars(array_merge(self::getLessVars($config), $extraVars));
$parser->SetImportDirs(array_fill_keys($config->get('ResourceLoaderLESSImportPaths'), ''));
$parser->SetOption('relativeUrls', false);
$parser->SetCacheDir($config->get('CacheDirectory') ?: wfTempDir());
return $parser;
}