--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat Testwork.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Testwork\Cli;
+
+use Behat\Testwork\ServiceContainer\Configuration\ConfigurationTree;
+use Behat\Testwork\ServiceContainer\ExtensionManager;
+use Symfony\Component\Config\Definition\Dumper\YamlReferenceDumper;
+use Symfony\Component\Config\Definition\ReferenceDumper;
+use Symfony\Component\Console\Command\Command as BaseCommand;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * Extends Symfony console application with testwork functionality.
+ *
+ * @author Christophe Coevoet <stof>
+ */
+final class DumpReferenceCommand extends BaseCommand
+{
+ /**
+ * @var ExtensionManager
+ */
+ private $extensionManager;
+
+ /**
+ * Initializes dumper.
+ *
+ * @param ExtensionManager $extensionManager
+ */
+ public function __construct(ExtensionManager $extensionManager)
+ {
+ $this->extensionManager = $extensionManager;
+
+ parent::__construct('dump-reference');
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function execute(InputInterface $input, OutputInterface $output)
+ {
+ if (class_exists('Symfony\Component\Config\Definition\Dumper\YamlReferenceDumper')) {
+ $dumper = new YamlReferenceDumper();
+ } else {
+ // Support Symfony Config 2.3
+ $dumper = new ReferenceDumper();
+ }
+
+ $configTree = new ConfigurationTree();
+
+ $output->writeln($dumper->dumpNode($configTree->getConfigTree($this->extensionManager->getExtensions())));
+ }
+}