[DI][Routing] recursive directory loading

Issue #11045

For now, the Routing DirectoryLoader requires the type `directory`
to be specified so it does not conflict with `AnnotationDirectoryLoader`.
However, this could be refactored.

Author: lavoiesl

Loader/DirectoryLoader.php

@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Loader;
+
+use Symfony\Component\Config\Resource\DirectoryResource;
+
+/**
+ * DirectoryLoader is a recursive loader to go through directories
+ *
+ * @author Sebastien Lavoie <seb@wemakecustom.com>
+ */
+class DirectoryLoader extends FileLoader
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function load($file, $type = null)
+    {
+        $file = rtrim($file, '/');
+        $path = $this->locator->locate($file);
+        $this->container->addResource(new DirectoryResource($path));
+
+        foreach (scandir($path) as $dir) {
+            if ($dir[0] !== '.') {
+                if (is_dir($path.'/'.$dir)) {
+                    $dir .= '/'; // append / to allow recursion
+                }
+
+                $this->setCurrentDir($path);
+
+                $this->import($dir, null, false, $path);
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function supports($resource, $type = null)
+    {
+        if ('directory' === $type) {
+            return true;
+        }
+
+        if (null === $type) {
+            return preg_match('/\/$/', $resource) === 1;
+        }
+
+        return false;
+    }
+}

Tests/Fixtures/directory/import/import.yml

@@ -0,0 +1,2 @@
+imports:
+    - { resource: ../recurse/ }

Tests/Fixtures/directory/recurse/simple.ini

@@ -0,0 +1,2 @@
+[parameters]
+  ini = ini

Tests/Fixtures/directory/recurse/simple.yml

@@ -0,0 +1,2 @@
+parameters:
+    yaml: yaml

Tests/Fixtures/directory/simple.php

@@ -0,0 +1,3 @@
+<?php
+
+$container->setParameter('php', 'php');

Tests/Loader/DirectoryLoaderTest.php

@@ -0,0 +1,85 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Tests\Loader;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
+use Symfony\Component\DependencyInjection\Loader\IniFileLoader;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\DependencyInjection\Loader\DirectoryLoader;
+use Symfony\Component\Config\Loader\LoaderResolver;
+use Symfony\Component\Config\FileLocator;
+
+class DirectoryLoaderTest extends \PHPUnit_Framework_TestCase
+{
+    private static $fixturesPath;
+
+    private $container;
+    private $loader;
+
+    public static function setUpBeforeClass()
+    {
+        self::$fixturesPath = realpath(__DIR__.'/../Fixtures/');
+    }
+
+    protected function setUp()
+    {
+        $locator = new FileLocator(self::$fixturesPath);
+        $this->container = new ContainerBuilder();
+        $this->loader = new DirectoryLoader($this->container, $locator);
+        $resolver = new LoaderResolver(array(
+            new PhpFileLoader($this->container, $locator),
+            new IniFileLoader($this->container, $locator),
+            new YamlFileLoader($this->container, $locator),
+            $this->loader,
+        ));
+        $this->loader->setResolver($resolver);
+    }
+
+    public function testDirectoryCanBeLoadedRecursively()
+    {
+        $this->loader->load('directory/');
+        $this->assertEquals(array('ini' => 'ini', 'yaml' => 'yaml', 'php' => 'php'), $this->container->getParameterBag()->all(), '->load() takes a single directory');
+    }
+
+    public function testImports()
+    {
+        $this->loader->resolve('directory/import/import.yml')->load('directory/import/import.yml');
+        $this->assertEquals(array('ini' => 'ini', 'yaml' => 'yaml'), $this->container->getParameterBag()->all(), '->load() takes a single file that imports a directory');
+    }
+
+    /**
+     * @covers Symfony\Component\DependencyInjection\Loader\DirectoryLoader::__construct
+     * @covers Symfony\Component\DependencyInjection\Loader\DirectoryLoader::load
+     *
+     * @expectedException        \InvalidArgumentException
+     * @expectedExceptionMessage The file "foo" does not exist (in:
+     */
+    public function testExceptionIsRaisedWhenDirectoryDoesNotExist()
+    {
+        $this->loader->load('foo/');
+    }
+
+    /**
+     * @covers Symfony\Component\DependencyInjection\Loader\DirectoryLoader::supports
+     */
+    public function testSupports()
+    {
+        $loader  = new DirectoryLoader(new ContainerBuilder(), new FileLocator());
+
+        $this->assertTrue($loader->supports('directory/'), '->supports("directory/") returns true');
+        $this->assertTrue($loader->supports('directory/', 'directory'), '->supports("directory/", "directory") returns true');
+        $this->assertFalse($loader->supports('directory'), '->supports("directory") returns false');
+        $this->assertTrue($loader->supports('directory', 'directory'), '->supports("directory", "directory") returns true');
+        $this->assertFalse($loader->supports('directory', 'foo'), '->supports("directory, "foo") returns false');
+    }
+}