--- /dev/null
+<?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\ServiceLocator;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * 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;
+ }
+}