Enable custom Logger(s).

src/Commands/DrushCommands.php

@@ -2,6 +2,7 @@
 
 namespace Drush\Commands;
 
+use Drush\Log\DrushLoggerManager;
 use Drush\Log\Logger;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Consolidation\AnnotatedCommand\CommandData;
@@ -63,7 +64,7 @@ protected function io(): SymfonyStyle
     /**
      * Returns a logger object.
      */
-    protected function logger(): ?Logger
+    protected function logger(): ?DrushLoggerManager
     {
         return $this->logger;
     }

src/Log/DrushLoggerManager.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Drush\Log;
+
+use Consolidation\Log\ConsoleLogLevel;
+use Consolidation\Log\LoggerManager;
+
+class DrushLoggerManager extends LoggerManager implements SuccessInterface
+{
+    public function success(string $message, array $context = array())
+    {
+        $this->log(ConsoleLogLevel::SUCCESS, $message, $context);
+    }
+}

src/Log/Logger.php

@@ -20,12 +20,11 @@
 
 namespace Drush\Log;
 
-use Consolidation\Log\ConsoleLogLevel;
 use Drush\Drush;
 use Robo\Log\RoboLogger;
 use Symfony\Component\Console\Output\OutputInterface;
 
-class Logger extends RoboLogger implements SuccessInterface
+class Logger extends RoboLogger
 {
     public function __construct(OutputInterface $output)
     {
@@ -73,9 +72,4 @@ public static function formatSize($size)
             return str_replace('@size', round($size, 2), $unit);
         }
     }
-
-    public function success($message, array $context = array())
-    {
-        $this->log(ConsoleLogLevel::SUCCESS, $message, $context);
-    }
 }

src/Runtime/DependencyInjection.php

@@ -2,6 +2,7 @@
 
 namespace Drush\Runtime;
 
+use Drush\Log\Logger;
 use League\Container\Container;
 use Symfony\Component\Console\Input\StringInput;
 use Symfony\Component\Console\Output\ConsoleOutput;
@@ -63,7 +64,7 @@ public function initContainer(
         $container = new Container();
 
         // With league/container 3.x, first call wins, so add Drush services first.
-        $this->addDrushServices($container, $loader, $drupalFinder, $aliasManager, $config);
+        $this->addDrushServices($container, $loader, $drupalFinder, $aliasManager, $config, $output);
 
         // Robo has the same signature for configureContainer in 1.x, 2.x and 3.x.
         Robo::configureContainer($container, $application, $config, $input, $output);
@@ -93,12 +94,12 @@ public function installHandlers($container): void
     }
 
     // Add Drush Services to league/container 3.x
-    protected function addDrushServices($container, ClassLoader $loader, DrupalFinder $drupalFinder, SiteAliasManager $aliasManager, DrushConfig $config): void
+    protected function addDrushServices($container, ClassLoader $loader, DrupalFinder $drupalFinder, SiteAliasManager $aliasManager, DrushConfig $config, OutputInterface $output): void
     {
-        // Override Robo's logger with our own
-        $container->share('logger', 'Drush\Log\Logger')
-          ->addArgument('output')
-          ->addMethodCall('setLogOutputStyler', ['logStyler']);
+        // Override Robo's logger with a LoggerManager that delegates to the Drush logger.
+        $container->share('logger', '\Drush\Log\DrushLoggerManager')
+          ->addMethodCall('setLogOutputStyler', ['logStyler'])
+          ->addMethodCall('add', ['drush', new Logger($output)]);
 
         $container->share('loader', $loader);
         $container->share('site.alias.manager', $aliasManager);

sut/drush/Commands/SimpleSutCommands.php

@@ -5,8 +5,12 @@
 use Consolidation\AnnotatedCommand\CommandData;
 use Consolidation\AnnotatedCommand\Events\CustomEventAwareInterface;
 use Consolidation\AnnotatedCommand\Events\CustomEventAwareTrait;
+use Consolidation\Log\ConsoleLogLevel;
 use Consolidation\OutputFormatters\StructuredData\RowsOfFields;
+use Drush\Drush;
+use Drush\Symfony\DrushArgvInput;
 use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Logger\ConsoleLogger;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Style\SymfonyStyle;
 use Drush\Commands\DrushCommands;
@@ -21,7 +25,7 @@
 class SimpleSutCommands extends DrushCommands
 {
     /**
-     * Show a fabulous picture.
+     * Show a message.
      *
      * @command sut:simple
      * @hidden
@@ -30,4 +34,23 @@ public function example()
     {
         $this->logger()->notice(dt("This is an example site-wide command committed to the repository in the SUT inside of the 'drush/Commands' directory."));
     }
+
+    /**
+     * Replace Drush logger with a custom one.
+     *
+     * In a real-world implementation, you would likely use `@hook *` instead of `@hook sut:simple`.
+     *
+     * @hook init sut:simple
+     */
+    public function customLogger(DrushArgvInput $argv, AnnotationData $annotationData): void
+    {
+        $verbosityLevelMap = [ConsoleLogLevel::SUCCESS => OutputInterface::VERBOSITY_NORMAL];
+        $formatLevelMap = [ConsoleLogLevel::SUCCESS => \Psr\Log\LogLevel::INFO];
+        // One could use Monolog if desired.
+        // Drush expects custom loggers to always write to stderr, so dont use ConsoleLogger directly,
+        $newLogger = new ConsoleLogger(Drush::output(), $verbosityLevelMap, $formatLevelMap);
+        $drushLoggerManager = $this->logger();
+        $drushLoggerManager->reset()->add('foo', $newLogger);
+    }
 }
+

tests/integration/CustomLoggerTest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Unish;
+
+class CustomLoggerTest extends UnishIntegrationTestCase
+{
+    public function testCustomLogger()
+    {
+        // Uses standard Drush logger.
+        $this->drush('version', [], ['debug' => true]);
+        $this->assertStringContainsString('sec', $this->getErrorOutputRaw());
+
+        // sut:simple has been hooked so that a custom logger is use. It doesn't show timing information during --debug.
+        $this->drush('sut:simple', [], ['debug' => true, 'simulate' => true]);
+        $this->assertStringNotContainsString('sec', $this->getOutput());
+    }
+}