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vendor/symfony/dependency-injection/Compiler/RegisterEnvVarProcessorsPass.php

@@ -0,0 +1,78 @@
+<?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\Compiler;
+
+use Symfony\Component\DependencyInjection\Argument\ServiceClosureArgument;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\EnvVarProcessor;
+use Symfony\Component\DependencyInjection\EnvVarProcessorInterface;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\ParameterBag\EnvPlaceholderParameterBag;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\ServiceLocator;
+
+/**
+ * Creates the container.env_var_processors_locator service.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class RegisterEnvVarProcessorsPass implements CompilerPassInterface
+{
+    private static $allowedTypes = array('array', 'bool', 'float', 'int', 'string');
+
+    public function process(ContainerBuilder $container)
+    {
+        $bag = $container->getParameterBag();
+        $types = array();
+        $processors = array();
+        foreach ($container->findTaggedServiceIds('container.env_var_processor') as $id => $tags) {
+            if (!$r = $container->getReflectionClass($class = $container->getDefinition($id)->getClass())) {
+                throw new InvalidArgumentException(sprintf('Class "%s" used for service "%s" cannot be found.', $class, $id));
+            } elseif (!$r->isSubclassOf(EnvVarProcessorInterface::class)) {
+                throw new InvalidArgumentException(sprintf('Service "%s" must implement interface "%s".', $id, EnvVarProcessorInterface::class));
+            }
+            foreach ($class::getProvidedTypes() as $prefix => $type) {
+                $processors[$prefix] = new ServiceClosureArgument(new Reference($id));
+                $types[$prefix] = self::validateProvidedTypes($type, $class);
+            }
+        }
+
+        if ($bag instanceof EnvPlaceholderParameterBag) {
+            foreach (EnvVarProcessor::getProvidedTypes() as $prefix => $type) {
+                if (!isset($types[$prefix])) {
+                    $types[$prefix] = self::validateProvidedTypes($type, EnvVarProcessor::class);
+                }
+            }
+            $bag->setProvidedTypes($types);
+        }
+
+        if ($processors) {
+            $container->register('container.env_var_processors_locator', ServiceLocator::class)
+                ->setPublic(true)
+                ->setArguments(array($processors))
+            ;
+        }
+    }
+
+    private static function validateProvidedTypes($types, $class)
+    {
+        $types = explode('|', $types);
+
+        foreach ($types as $type) {
+            if (!\in_array($type, self::$allowedTypes)) {
+                throw new InvalidArgumentException(sprintf('Invalid type "%s" returned by "%s::getProvidedTypes()", expected one of "%s".', $type, $class, implode('", "', self::$allowedTypes)));
+            }
+        }
+
+        return $types;
+    }
+}