+               //Here we define the parameters that are allowed to configure the bundle.
+               //TODO: see https://github.com/symfony/symfony/blob/master/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php for default value and description
+               //TODO: see http://symfony.com/doc/current/components/config/definition.html
+               //TODO: see https://github.com/symfony/assetic-bundle/blob/master/DependencyInjection/Configuration.php#L63
+               //TODO: use bin/console config:dump-reference to dump class infos
+               $treeBuilder
+                       //Parameters
+                       ->root('parameters')
+                               ->children()
+                                       ->arrayNode('rapsys_pack')
+                                               ->children()
+                                                       ->scalarNode('coutput')->defaultValue('css/*.pack.css')->end()
+                                                       ->scalarNode('joutput')->defaultValue('js/*.pack.js')->end()
+                                                       ->scalarNode('ioutput')->defaultValue('img/*.pack.jpg')->end()
+                                                       ->arrayNode('cfilter')
+                                                               ->treatNullLike(array())
+                                                               ->scalarPrototype()->end()
+                                                               ->defaultValue(array('Rapsys\PackBundle\Twig\Filter\CPackFilter'))
+                                                       ->end()
+                                                       ->arrayNode('jfilter')
+                                                               ->treatNullLike(array())
+                                                               ->scalarPrototype()->end()
+                                                               ->defaultValue(array('Rapsys\PackBundle\Twig\Filter\JPackFilter'))
+                                                       ->end()
+                                                       ->arrayNode('ifilter')
+                                                               ->treatNullLike(array())
+                                                               ->scalarPrototype()->end()
+                                                               ->defaultValue(array('Rapsys\PackBundle\Twig\Filter\IPackFilter'))
+                                                       ->end()
+                                                       ->scalarNode('prefix')->defaultValue($this->projectDir)->end()
+                                                       ->scalarNode('scheme')->defaultValue('https://')->end()
+                                                       ->integerNode('timeout')->min(0)->defaultValue((int)ini_get('default_socket_timeout'))->end()
+                                                       ->scalarNode('agent')->defaultValue(ini_get('user_agent'))->end()
+                                                       ->integerNode('redirect')->min(1)->defaultValue(20)->end()
+                                               ->end()
+                                       ->end()
+                                       ->arrayNode('rapsys_pack_cpackfilter')
+                                               ->children()
+                                                       ->scalarNode('bin')->defaultValue(function () use ($finder) { return $finder->find('cpack', '/usr/local/bin/cpack'); })->end()
+                                               ->end()
+                                       ->end()
+                                       ->arrayNode('rapsys_pack_jpackfilter')
+                                               ->children()
+                                                       ->scalarNode('bin')->defaultValue(function () use ($finder) { return $finder->find('jpack', '/usr/local/bin/jpack'); })->end()
+                                               ->end()
+                                       ->end()
+                               ->end()
+                       ->end();
+
+               return $treeBuilder;
+       }