use a compiler pass to register translation files in their new location

CraueFormFlowBundle.php

@@ -2,6 +2,8 @@
 
 namespace Craue\FormFlowBundle;
 
+use Craue\FormFlowBundle\DependencyInjection\Compiler\LoadTranslationsCompilerPass;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
 /**
@@ -10,4 +12,13 @@
  * @license http://opensource.org/licenses/mit-license.php MIT License
  */
 class CraueFormFlowBundle extends Bundle {
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function build(ContainerBuilder $container) {
+		parent::build($container);
+		$container->addCompilerPass(new LoadTranslationsCompilerPass());
+	}
+
 }

DependencyInjection/Compiler/LoadTranslationsCompilerPass.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Craue\FormFlowBundle\DependencyInjection\Compiler;
+
+use Symfony\Component\Config\Resource\DirectoryResource;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\Finder\Finder;
+
+/**
+ * Explicitly registers translation files in their uncommon location.
+ *
+ * @author Christian Raue <[email protected]>
+ * @copyright 2011-2014 Christian Raue
+ * @license http://opensource.org/licenses/mit-license.php MIT License
+ */
+class LoadTranslationsCompilerPass implements CompilerPassInterface {
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function process(ContainerBuilder $container) {
+		$dir = __DIR__ . '/../../FormFlow/Resources/translations';
+
+		// taken roughly from https://github.com/symfony/symfony/blob/ce15db564736d7a0cf02a0db688a0ee101959cb5/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php#L650
+		$container->addResource(new DirectoryResource($dir));
+
+		$finder = Finder::create()
+			->files()
+			->in($dir)
+			->filter(function (\SplFileInfo $file) {
+				$basename = $file->getBasename();
+				return substr_count($basename, '.') === 2 && preg_match('/\.\w+$/', $basename);
+			})
+		;
+
+		$translator = $container->findDefinition('translator');
+
+		foreach ($finder as $file) {
+			list($domain, $locale, $format) = explode('.', $file->getBasename(), 3);
+			$translator->addMethodCall('addResource', array($format, (string) $file, $locale, $domain));
+		}
+	}
+
+}