Log deprecations on a dedicated Monolog channel

Author: l-vo

Resources/config/debug_prod.xml

@@ -15,12 +15,13 @@
             <tag name="kernel.event_subscriber" />
             <tag name="monolog.logger" channel="php" />
             <argument>null</argument><!-- Exception handler -->
-            <argument type="service" id="logger" on-invalid="null" />
+            <argument type="service" id="monolog.logger.php" on-invalid="null" />
             <argument>null</argument><!-- Log levels map for enabled error levels -->
             <argument>%debug.error_handler.throw_at%</argument>
             <argument>%kernel.debug%</argument>
             <argument type="service" id="debug.file_link_formatter" />
             <argument>%kernel.debug%</argument>
+            <argument type="service" id="monolog.logger.deprecation" on-invalid="null" />
         </service>
 
         <service id="debug.file_link_formatter" class="Symfony\Component\HttpKernel\Debug\FileLinkFormatter">

Tests/DependencyInjection/FrameworkExtensionTest.php

@@ -425,7 +425,7 @@ public function testEnabledPhpErrorsConfig()
         $container = $this->createContainerFromFile('php_errors_enabled');
 
         $definition = $container->getDefinition('debug.debug_handlers_listener');
-        $this->assertEquals(new Reference('logger', ContainerInterface::NULL_ON_INVALID_REFERENCE), $definition->getArgument(1));
+        $this->assertEquals(new Reference('monolog.logger.php', ContainerInterface::NULL_ON_INVALID_REFERENCE), $definition->getArgument(1));
         $this->assertNull($definition->getArgument(2));
         $this->assertSame(-1, $container->getParameter('debug.error_handler.throw_at'));
     }
@@ -445,7 +445,7 @@ public function testPhpErrorsWithLogLevel()
         $container = $this->createContainerFromFile('php_errors_log_level');
 
         $definition = $container->getDefinition('debug.debug_handlers_listener');
-        $this->assertEquals(new Reference('logger', ContainerInterface::NULL_ON_INVALID_REFERENCE), $definition->getArgument(1));
+        $this->assertEquals(new Reference('monolog.logger.php', ContainerInterface::NULL_ON_INVALID_REFERENCE), $definition->getArgument(1));
         $this->assertSame(8, $definition->getArgument(2));
     }