symfony · fabpot · Aug 30, 2021 · Jul 9, 2021 · Tobion · Aug 27, 2021
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -555,8 +555,15 @@ public function load(array $configs, ContainerBuilder $container)
         $container->registerForAutoconfiguration(LoggerAwareInterface::class)
             ->addMethodCall('setLogger', [new Reference('logger')]);
 
-        $container->registerAttributeForAutoconfiguration(AsEventListener::class, static function (ChildDefinition $definition, AsEventListener $attribute): void {
-            $definition->addTag('kernel.event_listener', get_object_vars($attribute));
+        $container->registerAttributeForAutoconfiguration(AsEventListener::class, static function (ChildDefinition $definition, AsEventListener $attribute, \Reflector $reflector) {
+            $tagAttributes = get_object_vars($attribute);
+            if ($reflector instanceof \ReflectionMethod) {
+                if (isset($tagAttributes['method'])) {
+                    throw new LogicException(sprintf('AsEventListener attribute cannot declare a method on "%s::%s()".', $reflector->class, $reflector->name));
+                }
+                $tagAttributes['method'] = $reflector->getName();
+            }
+            $definition->addTag('kernel.event_listener', $tagAttributes);
         });
         $container->registerAttributeForAutoconfiguration(AsController::class, static function (ChildDefinition $definition, AsController $attribute): void {
             $definition->addTag('controller.service_arguments');

diff --git a/src/Symfony/Component/DependencyInjection/CHANGELOG.md b/src/Symfony/Component/DependencyInjection/CHANGELOG.md
@@ -4,7 +4,8 @@ CHANGELOG
 5.4
 ---
 
-* Add `service_closure()` to the PHP-DSL
+ * Add `service_closure()` to the PHP-DSL
+ * Add support for autoconfigurable attributes on methods, properties and parameters
 
 5.3
 ---

diff --git a/src/Symfony/Component/DependencyInjection/Compiler/AttributeAutoconfigurationPass.php b/src/Symfony/Component/DependencyInjection/Compiler/AttributeAutoconfigurationPass.php
@@ -14,18 +14,66 @@
 use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
 
 /**
  * @author Alexander M. Turek <me@derrabus.de>
  */
 final class AttributeAutoconfigurationPass extends AbstractRecursivePass
 {
+    private $classAttributeConfigurators = [];
+    private $methodAttributeConfigurators = [];
+    private $propertyAttributeConfigurators = [];
+    private $parameterAttributeConfigurators = [];
+
     public function process(ContainerBuilder $container): void
     {
         if (80000 > \PHP_VERSION_ID || !$container->getAutoconfiguredAttributes()) {
             return;
         }
 
+        foreach ($container->getAutoconfiguredAttributes() as $attributeName => $callable) {
+            $callableReflector = new \ReflectionFunction(\Closure::fromCallable($callable));
+            if ($callableReflector->getNumberOfParameters() <= 2) {
+                $this->classAttributeConfigurators[$attributeName] = $callable;
+                continue;
+            }
+
+            $reflectorParameter = $callableReflector->getParameters()[2];
+            $parameterType = $reflectorParameter->getType();
+            $types = [];
+            if ($parameterType instanceof \ReflectionUnionType) {
+                foreach ($parameterType->getTypes() as $type) {
+                    $types[] = $type->getName();
+                }
+            } elseif ($parameterType instanceof \ReflectionNamedType) {
+                $types[] = $parameterType->getName();
+            } else {
+                throw new LogicException(sprintf('Argument "$%s" of attribute autoconfigurator should have a type, use one or more of "\ReflectionClass|\ReflectionMethod|\ReflectionProperty|\ReflectionParameter|\Reflector" in "%s" on line "%d".', $reflectorParameter->getName(), $callableReflector->getFileName(), $callableReflector->getStartLine()));
+            }
+
+            try {
+                $attributeReflector = new \ReflectionClass($attributeName);
+            } catch (\ReflectionException $e) {
+                continue;
+            }
+
+            $targets = $attributeReflector->getAttributes(\Attribute::class)[0] ?? 0;
+            $targets = $targets ? $targets->getArguments()[0] ?? -1 : 0;
+
+            foreach (['class', 'method', 'property', 'parameter'] as $symbol) {
+                if (['Reflector'] !== $types) {
+                    if (!\in_array('Reflection'.ucfirst($symbol), $types, true)) {
+                        continue;
+                    }
+                    if (!($targets & \constant('Attribute::TARGET_'.strtoupper($symbol)))) {
+                        throw new LogicException(sprintf('Invalid type "Reflection%s" on argument "$%s": attribute "%s" cannot target a '.$symbol.' in "%s" on line "%d".', ucfirst($symbol), $reflectorParameter->getName(), $attributeName, $callableReflector->getFileName(), $callableReflector->getStartLine()));
+                    }
+                }
+                $this->{$symbol.'AttributeConfigurators'}[$attributeName] = $callable;
+            }
+        }
+
         parent::process($container);
     }
 
@@ -35,21 +83,74 @@ protected function processValue($value, bool $isRoot = false)
             || !$value->isAutoconfigured()
             || $value->isAbstract()
             || $value->hasTag('container.ignore_attributes')
-            || !($reflector = $this->container->getReflectionClass($value->getClass(), false))
+            || !($classReflector = $this->container->getReflectionClass($value->getClass(), false))
         ) {
             return parent::processValue($value, $isRoot);
         }
 
-        $autoconfiguredAttributes = $this->container->getAutoconfiguredAttributes();
         $instanceof = $value->getInstanceofConditionals();
-        $conditionals = $instanceof[$reflector->getName()] ?? new ChildDefinition('');
-        foreach ($reflector->getAttributes() as $attribute) {
-            if ($configurator = $autoconfiguredAttributes[$attribute->getName()] ?? null) {
-                $configurator($conditionals, $attribute->newInstance(), $reflector);
+        $conditionals = $instanceof[$classReflector->getName()] ?? new ChildDefinition('');
+
+        if ($this->classAttributeConfigurators) {
+            foreach ($classReflector->getAttributes() as $attribute) {
+                if ($configurator = $this->classAttributeConfigurators[$attribute->getName()] ?? null) {
+                    $configurator($conditionals, $attribute->newInstance(), $classReflector);
+                }
             }
         }
-        if (!isset($instanceof[$reflector->getName()]) && new ChildDefinition('') != $conditionals) {
-            $instanceof[$reflector->getName()] = $conditionals;
+
+        if ($this->parameterAttributeConfigurators && $constructorReflector = $this->getConstructor($value, false)) {
+            foreach ($constructorReflector->getParameters() as $parameterReflector) {
+                foreach ($parameterReflector->getAttributes() as $attribute) {
+                    if ($configurator = $this->parameterAttributeConfigurators[$attribute->getName()] ?? null) {
+                        $configurator($conditionals, $attribute->newInstance(), $parameterReflector);
+                    }
+                }
+            }
+        }
+
+        if ($this->methodAttributeConfigurators || $this->parameterAttributeConfigurators) {
+            foreach ($classReflector->getMethods(\ReflectionMethod::IS_PUBLIC) as $methodReflector) {
+                if ($methodReflector->isStatic() || $methodReflector->isConstructor() || $methodReflector->isDestructor()) {
+                    continue;
+                }
+
+                if ($this->methodAttributeConfigurators) {
+                    foreach ($methodReflector->getAttributes() as $attribute) {
+                        if ($configurator = $this->methodAttributeConfigurators[$attribute->getName()] ?? null) {
+                            $configurator($conditionals, $attribute->newInstance(), $methodReflector);
+                        }
+                    }
+                }
+
+                if ($this->parameterAttributeConfigurators) {
+                    foreach ($methodReflector->getParameters() as $parameterReflector) {
+                        foreach ($parameterReflector->getAttributes() as $attribute) {
+                            if ($configurator = $this->parameterAttributeConfigurators[$attribute->getName()] ?? null) {
+                                $configurator($conditionals, $attribute->newInstance(), $parameterReflector);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        if ($this->propertyAttributeConfigurators) {
+            foreach ($classReflector->getProperties(\ReflectionProperty::IS_PUBLIC) as $propertyReflector) {
+                if ($propertyReflector->isStatic()) {
+                    continue;
+                }
+
+                foreach ($propertyReflector->getAttributes() as $attribute) {
+                    if ($configurator = $this->propertyAttributeConfigurators[$attribute->getName()] ?? null) {
+                        $configurator($conditionals, $attribute->newInstance(), $propertyReflector);
+                    }
+                }
+            }
+        }
+
+        if (!isset($instanceof[$classReflector->getName()]) && new ChildDefinition('') != $conditionals) {
+            $instanceof[$classReflector->getName()] = $conditionals;
             $value->setInstanceofConditionals($instanceof);
         }
 

diff --git a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
@@ -1309,7 +1309,15 @@ public function registerForAutoconfiguration(string $interface)
     /**
      * Registers an attribute that will be used for autoconfiguring annotated classes.
      *
-     * The configurator will receive a ChildDefinition instance, an instance of the attribute and the corresponding \ReflectionClass, in that order.
+     * The third argument passed to the callable is the reflector of the
+     * class/method/property/parameter that the attribute targets. Using one or many of
+     * \ReflectionClass|\ReflectionMethod|\ReflectionProperty|\ReflectionParameter as a type-hint
+     * for this argument allows filtering which attributes should be passed to the callable.
+     *
+     * @template T
+     *
+     * @param class-string<T>                                $attributeClass
+     * @param callable(ChildDefinition, T, \Reflector): void $configurator
      */
     public function registerAttributeForAutoconfiguration(string $attributeClass, callable $configurator): void
     {

diff --git a/...mfony/Component/DependencyInjection/Tests/Compiler/AttributeAutoconfigurationPassTest.php b/...mfony/Component/DependencyInjection/Tests/Compiler/AttributeAutoconfigurationPassTest.php
@@ -13,8 +13,10 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\DependencyInjection\Attribute\AsTaggedItem;
+use Symfony\Component\DependencyInjection\ChildDefinition;
 use Symfony\Component\DependencyInjection\Compiler\AttributeAutoconfigurationPass;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
 
 /**
  * @requires PHP 8
@@ -33,4 +35,17 @@ public function testProcessAddsNoEmptyInstanceofConditionals()
 
         $this->assertSame([], $container->getDefinition('foo')->getInstanceofConditionals());
     }
+
+    public function testAttributeConfiguratorCallableMissingType()
+    {
+        $container = new ContainerBuilder();
+        $container->registerAttributeForAutoconfiguration(AsTaggedItem::class, static function (ChildDefinition $definition, AsTaggedItem $attribute, $reflector) {});
+        $container->register('foo', \stdClass::class)
+            ->setAutoconfigured(true)
+        ;
+
+        $this->expectException(LogicException::class);
+        $this->expectExceptionMessage('Argument "$reflector" of attribute autoconfigurator should have a type, use one or more of "\ReflectionClass|\ReflectionMethod|\ReflectionProperty|\ReflectionParameter|\Reflector" in ');
+        (new AttributeAutoconfigurationPass())->process($container);
+    }
 }
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php b/src/Symfony/Component/DependencyInjection/Tests/Compiler/IntegrationTest.php
@@ -23,7 +23,11 @@
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\DependencyInjection\ServiceLocator;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\Attribute\CustomAnyAttribute;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\Attribute\CustomAutoconfiguration;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\Attribute\CustomMethodAttribute;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\Attribute\CustomParameterAttribute;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\Attribute\CustomPropertyAttribute;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\BarTagClass;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\FooBarTaggedClass;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\FooBarTaggedForDefaultPriorityClass;
@@ -37,6 +41,7 @@
 use Symfony\Component\DependencyInjection\Tests\Fixtures\TaggedService2;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\TaggedService3;
 use Symfony\Component\DependencyInjection\Tests\Fixtures\TaggedService3Configurator;
+use Symfony\Component\DependencyInjection\Tests\Fixtures\TaggedService4;
 use Symfony\Contracts\Service\ServiceProviderInterface;
 use Symfony\Contracts\Service\ServiceSubscriberInterface;
 
@@ -729,6 +734,86 @@ static function (Definition $definition, CustomAutoconfiguration $attribute) {
         ], $collector->collectedTags);
     }
 
+    /**
+     * @requires PHP 8
+     */
+    public function testTagsViaAttributeOnPropertyMethodAndParameter()
+    {
+        $container = new ContainerBuilder();
+        $container->registerAttributeForAutoconfiguration(
+            CustomMethodAttribute::class,
+            static function (ChildDefinition $definition, CustomMethodAttribute $attribute, \ReflectionMethod $reflector) {
+                $tagAttributes = get_object_vars($attribute);
+                $tagAttributes['method'] = $reflector->getName();
+
+                $definition->addTag('app.custom_tag', $tagAttributes);
+            }
+        );
+        $container->registerAttributeForAutoconfiguration(
+            CustomPropertyAttribute::class,
+            static function (ChildDefinition $definition, CustomPropertyAttribute $attribute, \ReflectionProperty $reflector) {
+                $tagAttributes = get_object_vars($attribute);
+                $tagAttributes['property'] = $reflector->getName();
+
+                $definition->addTag('app.custom_tag', $tagAttributes);
+            }
+        );
+        $container->registerAttributeForAutoconfiguration(
+            CustomParameterAttribute::class,
+            static function (ChildDefinition $definition, CustomParameterAttribute $attribute, \ReflectionParameter $reflector) {
+                $tagAttributes = get_object_vars($attribute);
+                $tagAttributes['parameter'] = $reflector->getName();
+
+                $definition->addTag('app.custom_tag', $tagAttributes);
+            }
+        );
+        $container->registerAttributeForAutoconfiguration(
+            CustomAnyAttribute::class,
+            eval(<<<'PHP'
+            return static function (\Symfony\Component\DependencyInjection\ChildDefinition $definition, \Symfony\Component\DependencyInjection\Tests\Fixtures\Attribute\CustomAnyAttribute $attribute, \ReflectionClass|\ReflectionMethod|\ReflectionProperty|\ReflectionParameter $reflector) {
+                $tagAttributes = get_object_vars($attribute);
+                if ($reflector instanceof \ReflectionClass) {
+                    $tagAttributes['class'] = $reflector->getName();
+                } elseif ($reflector instanceof \ReflectionMethod) {
+                    $tagAttributes['method'] = $reflector->getName();
+                } elseif ($reflector instanceof \ReflectionProperty) {
+                    $tagAttributes['property'] = $reflector->getName();
+                } elseif ($reflector instanceof \ReflectionParameter) {
+                    $tagAttributes['parameter'] = $reflector->getName();
+                }
+
+                $definition->addTag('app.custom_tag', $tagAttributes);
+            };
+PHP
+            ));
+
+        $container->register(TaggedService4::class)
+            ->setPublic(true)
+            ->setAutoconfigured(true);
+
+        $collector = new TagCollector();
+        $container->addCompilerPass($collector);
+
+        $container->compile();
+
+        self::assertSame([
+            TaggedService4::class => [
+                ['class' => TaggedService4::class],
+                ['parameter' => 'param1'],
+                ['someAttribute' => 'on param1 in constructor', 'priority' => 0, 'parameter' => 'param1'],
+                ['parameter' => 'param2'],
+                ['someAttribute' => 'on param2 in constructor', 'priority' => 0, 'parameter' => 'param2'],
+                ['method' => 'fooAction'],
+                ['someAttribute' => 'on fooAction', 'priority' => 0, 'method' => 'fooAction'],
+                ['someAttribute' => 'on param1 in fooAction', 'priority' => 0, 'parameter' => 'param1'],
+                ['method' => 'barAction'],
+                ['someAttribute' => 'on barAction', 'priority' => 0, 'method' => 'barAction'],
+                ['property' => 'name'],
+                ['someAttribute' => 'on name', 'priority' => 0, 'property' => 'name'],
+            ],
+        ], $collector->collectedTags);
+    }
+
     /**
      * @requires PHP 8
      */

diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Attribute/CustomAnyAttribute.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Attribute/CustomAnyAttribute.php
@@ -0,0 +1,17 @@
+<?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\Fixtures\Attribute;
+
+#[\Attribute(\Attribute::TARGET_CLASS | \Attribute::TARGET_METHOD | \Attribute::TARGET_PROPERTY | \Attribute::TARGET_PARAMETER)]
+final class CustomAnyAttribute
+{
+}
diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Attribute/CustomMethodAttribute.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/Attribute/CustomMethodAttribute.php
@@ -0,0 +1,22 @@
+<?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\Fixtures\Attribute;
+
+#[\Attribute(\Attribute::TARGET_METHOD)]
+final class CustomMethodAttribute
+{
+    public function __construct(
+        public string $someAttribute,
+        public int $priority = 0,
+    ) {
+    }
+}
diff --git a/...mfony/Component/DependencyInjection/Tests/Fixtures/Attribute/CustomParameterAttribute.php b/...mfony/Component/DependencyInjection/Tests/Fixtures/Attribute/CustomParameterAttribute.php
@@ -0,0 +1,22 @@
+<?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\Fixtures\Attribute;
+
+#[\Attribute(\Attribute::TARGET_PARAMETER)]
+final class CustomParameterAttribute
+{
+    public function __construct(
+        public string $someAttribute,
+        public int $priority = 0,
+    ) {
+    }
+}
-Original file line number
+Diff line change
@@ Expand Up / @@ -4,7 +4,8 @@ CHANGELOG @@
 .4
     ---
-    * Add `service_closure()` to the PHP-DSL
+     * Add `service_closure()` to the PHP-DSL
+     * Add support for autoconfigurable attributes on methods, properties and parameters
 .3
     ---
@@ Expand Down @@