warm icons in asset-mapper's PreAssetsCompileEvent

Author: kbond

src/Icons/composer.json

@@ -32,6 +32,7 @@
         "symfony/twig-bundle": "^6.4|^7.0"
     },
     "require-dev": {
+        "symfony/asset-mapper": "^6.4|^7.0",
         "symfony/console": "^6.4|^7.0",
         "symfony/http-client": "6.4|^7.0",
         "symfony/phpunit-bridge": "^6.3|^7.0",

src/Icons/config/asset_mapper.php

@@ -0,0 +1,28 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Loader\Configurator;
+
+use Symfony\Component\AssetMapper\Event\PreAssetsCompileEvent;
+use Symfony\UX\Icons\EventListener\WarmIconCacheOnAssetCompileListener;
+
+return static function (ContainerConfigurator $container): void {
+    $container->services()
+        ->set('.ux_icons.event_listener.warm_icon_cache_on_asset_compile', WarmIconCacheOnAssetCompileListener::class)
+            ->args([
+                service('.ux_icons.cache_warmer'),
+            ])
+            ->tag('kernel.event_listener', [
+                'event' => PreAssetsCompileEvent::class,
+                'method' => '__invoke',
+            ])
+    ;
+};

src/Icons/src/DependencyInjection/UXIconsExtension.php

@@ -11,6 +11,7 @@
 
 namespace Symfony\UX\Icons\DependencyInjection;
 
+use Symfony\Component\AssetMapper\Event\PreAssetsCompileEvent;
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\Config\FileLocator;
@@ -72,6 +73,10 @@ protected function loadInternal(array $mergedConfig, ContainerBuilder $container
             $loader->load('twig_component.php');
         }
 
+        if (class_exists(PreAssetsCompileEvent::class)) {
+            $loader->load('asset_mapper.php');
+        }
+
         $container->getDefinition('.ux_icons.local_svg_icon_registry')
             ->setArguments([
                 $mergedConfig['icon_dir'],

src/Icons/src/EventListener/WarmIconCacheOnAssetCompileListener.php

@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\UX\Icons\EventListener;
+
+use Symfony\Component\AssetMapper\Event\PreAssetsCompileEvent;
+use Symfony\UX\Icons\IconCacheWarmer;
+
+/**
+ * @author Kevin Bond <[email protected]>
+ *
+ * @internal
+ */
+final class WarmIconCacheOnAssetCompileListener
+{
+    public function __construct(private IconCacheWarmer $warmer)
+    {
+    }
+
+    public function __invoke(PreAssetsCompileEvent $event): void
+    {
+        $event->getOutput()->writeln('Warming the icon cache...');
+
+        $this->warmer->warm();
+
+        $event->getOutput()->writeln('Icon cache warmed.');
+    }
+}