ContentExtension

config/services.php

@@ -2,6 +2,7 @@
 
 declare(strict_types=1);
 
+use App\Twig\ContentExtension;
 use SumoCoders\FrameworkCoreBundle\Command\TranslateCommand;
 use Symfony\Component\Form\Extension\Core\Type\TimeType;
 use SumoCoders\FrameworkCoreBundle\Service\Fallbacks;
@@ -101,6 +102,9 @@
         ->set('framework.paginator_runtime', PaginatorRuntime::class)
             ->tag('twig.runtime')
 
+        ->set('framework.content_extension', ContentExtension::class)
+            ->tag('twig.extension')
+
         /*
          * Breadcrumbs
          */

src/Twig/ContentExtension.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Twig;
+
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class ContentExtension extends AbstractExtension
+{
+    public function __construct(
+        #[Autowire('%kernel.project_dir%/public')]
+        private string $publicFolder
+    ) {
+    }
+
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction('content', [$this, 'getContent'], ['is_safe' => ['html']]),
+        ];
+    }
+
+    public function getContent(string $path): string
+    {
+        return file_get_contents($this->publicFolder . $path);
+    }
+}

templates/Mail/base.html.twig

@@ -1,4 +1,4 @@
-{% apply inky_to_html|inline_css(source(asset('build/mail.css'))) %}
+{% apply inky_to_html|inline_css(content(asset('build/mail.css'))) %}
     <spacer size="16"></spacer>
     <container>
         <spacer size="16"></spacer>