bug #29597 [DI] fix reporting bindings on overriden services as unused (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
----------

[DI] fix reporting bindings on overriden services as unused

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #28326
| License       | MIT
| Doc PR        | -

Commits
-------

e07ad2b477 [DI] fix reporting bindings on overriden services as unused

src/Symfony/Component/DependencyInjection/Compiler/ResolveBindingsPass.php

@@ -34,6 +34,8 @@ class ResolveBindingsPass extends AbstractRecursivePass
      */
     public function process(ContainerBuilder $container)
     {
+        $this->usedBindings = $container->getRemovedBindingIds();
+
         try {
             parent::process($container);
 

src/Symfony/Component/DependencyInjection/ContainerBuilder.php

@@ -123,6 +123,8 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
 
     private $removedIds = array();
 
+    private $removedBindingIds = array();
+
     private static $internalTypes = array(
         'int' => true,
         'float' => true,
@@ -531,7 +533,8 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
             throw new BadMethodCallException(sprintf('Setting service "%s" for an unknown or non-synthetic service definition on a compiled container is not allowed.', $id));
         }
 
-        unset($this->definitions[$id], $this->aliasDefinitions[$id], $this->removedIds[$id]);
+        $this->removeId($id);
+        unset($this->removedIds[$id]);
 
         parent::set($id, $service);
     }
@@ -544,8 +547,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     public function removeDefinition($id)
     {
         if (isset($this->definitions[$id = $this->normalizeId($id)])) {
-            unset($this->definitions[$id]);
+            $this->removeId($id);
-            $this->removedIds[$id] = true;
         }
     }
 
@@ -876,7 +878,8 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
             throw new InvalidArgumentException(sprintf('An alias can not reference itself, got a circular reference on "%s".', $alias));
         }
 
-        unset($this->definitions[$alias], $this->removedIds[$alias]);
+        $this->removeId($alias);
+        unset($this->removedIds[$alias]);
 
         return $this->aliasDefinitions[$alias] = $id;
     }
@@ -889,8 +892,7 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
     public function removeAlias($alias)
     {
         if (isset($this->aliasDefinitions[$alias = $this->normalizeId($alias)])) {
-            unset($this->aliasDefinitions[$alias]);
+            $this->removeId($alias);
-            $this->removedIds[$alias] = true;
         }
     }
 
@@ -1019,7 +1021,8 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
 
         $id = $this->normalizeId($id);
 
-        unset($this->aliasDefinitions[$id], $this->removedIds[$id]);
+        $this->removeId($id);
+        unset($this->removedIds[$id]);
 
         return $this->definitions[$id] = $definition;
     }
@@ -1552,6 +1555,18 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
         return $services;
     }
 
+    /**
+     * Gets removed binding ids.
+     *
+     * @return array
+     *
+     * @internal
+     */
+    public function getRemovedBindingIds()
+    {
+        return $this->removedBindingIds;
+    }
+
     /**
      * Computes a reasonably unique hash of a value.
      *
@@ -1656,4 +1671,21 @@ class ContainerBuilder extends Container implements TaggedContainerInterface
 
         return false;
     }
+
+    private function removeId($id)
+    {
+        $this->removedIds[$id] = true;
+        unset($this->aliasDefinitions[$id]);
+
+        if (!isset($this->definitions[$id])) {
+            return;
+        }
+
+        foreach ($this->definitions[$id]->getBindings() as $binding) {
+            list(, $identifier) = $binding->getValues();
+            $this->removedBindingIds[$identifier] = true;
+        }
+
+        unset($this->definitions[$id]);
+    }
 }

src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveBindingsPassTest.php

@@ -111,4 +111,22 @@ class ResolveBindingsPassTest extends TestCase
 
         $this->assertEquals(array(array('setDefaultLocale', array('fr'))), $definition->getMethodCalls());
     }
+
+    public function testOverriddenBindings()
+    {
+        $container = new ContainerBuilder();
+
+        $binding = new BoundArgument('bar');
+
+        $container->register('foo', 'stdClass')
+            ->setBindings(array('$foo' => clone $binding));
+        $container->register('bar', 'stdClass')
+            ->setBindings(array('$foo' => clone $binding));
+
+        $container->register('foo', 'stdClass');
+
+        (new ResolveBindingsPass())->process($container);
+
+        $this->assertInstanceOf('stdClass', $container->get('foo'));
+    }
 }

src/Symfony/Component/DependencyInjection/Tests/Compiler/ResolveChildDefinitionsPassTest.php

@@ -434,7 +434,7 @@ class ResolveChildDefinitionsPassTest extends TestCase
 
     /**
      * @expectedException \Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException
-     * @expectedExceptionMessageRegExp /^Circular reference detected for service "c", path: "c -> b -> a -> c"./
+     * @expectedExceptionMessageRegExp /^Circular reference detected for service "a", path: "a -> c -> b -> a"./
      */
     public function testProcessDetectsChildDefinitionIndirectCircularReference()
     {

src/Symfony/Component/DependencyInjection/Tests/ContainerBuilderTest.php

@@ -559,7 +559,7 @@ class ContainerBuilderTest extends TestCase
         $config->setDefinition('baz', new Definition('BazClass'));
         $config->setAlias('alias_for_foo', 'foo');
         $container->merge($config);
-        $this->assertEquals(array('service_container', 'foo', 'bar', 'baz'), array_keys($container->getDefinitions()), '->merge() merges definitions already defined ones');
+        $this->assertEquals(array('foo', 'bar', 'service_container', 'baz'), array_keys($container->getDefinitions()), '->merge() merges definitions already defined ones');
 
         $aliases = $container->getAliases();
         $this->assertArrayHasKey('alias_for_foo', $aliases);

src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/instanceof.expected.yml

@@ -4,6 +4,9 @@ services:
         class: Symfony\Component\DependencyInjection\ContainerInterface
         public: true
         synthetic: true
+    foo:
+        class: App\FooService
+        public: true
     Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo:
         class: Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo
         public: true
@@ -16,6 +19,3 @@ services:
 
         shared: false
         configurator: c
-    foo:
-        class: App\FooService
-        public: true

src/Symfony/Component/DependencyInjection/Tests/Fixtures/config/prototype.expected.yml

@@ -4,15 +4,6 @@ services:
         class: Symfony\Component\DependencyInjection\ContainerInterface
         public: true
         synthetic: true
-    Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo:
-        class: Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo
-        public: true
-        tags:
-            - { name: foo }
-            - { name: baz }
-        deprecated: '%service_id%'
-        arguments: [1]
-        factory: f
     Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Sub\Bar:
         class: Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Sub\Bar
         public: true
@@ -23,3 +14,12 @@ services:
         lazy: true
         arguments: [1]
         factory: f
+    Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo:
+        class: Symfony\Component\DependencyInjection\Tests\Fixtures\Prototype\Foo
+        public: true
+        tags:
+            - { name: foo }
+            - { name: baz }
+        deprecated: '%service_id%'
+        arguments: [1]
+        factory: f