Для ресурсов добавлены версии по содержимому

bundle/TwigExtensionBundle/DependencyInjection/TwigExtensionExtension.php

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+<?php
+
+namespace Homepage\TwigExtensionBundle\DependencyInjection;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Loader;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+
+class TwigExtensionExtension extends Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+        $loader->load('services.yml');
+    }
+}

bundle/TwigExtensionBundle/Resources/config/services.yml

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+services:
+  homepage.twig_extension:
+    class: \Homepage\TwigExtensionBundle\TwigExtension
+    arguments:
+      - '%sculpin.output_dir%'
+    public: yes
+    tags:
+      - { name: twig.extension }

bundle/TwigExtensionBundle/TwigExtension.php

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+<?php
+
+namespace Homepage\TwigExtensionBundle;
+
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class TwigExtension extends AbstractExtension
+{
+    private $outputDir;
+
+    public function __construct(string $outputDir)
+    {
+        $this->outputDir = $outputDir;
+    }
+
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction('hashed_asset', [$this, 'createHashedFileLink']),
+        ];
+    }
+
+    public function createHashedFileLink(string $path): string
+    {
+        $fullPath = $this->join($this->outputDir, $path);
+        $realPath = realpath($fullPath);
+
+        if (!file_exists($realPath)) {
+            return sprintf('%s?v=%s', $path, time());
+        }
+
+        $hash = md5_file($realPath);
+
+        return sprintf('%s?v=%s', $path, $hash);
+    }
+
+    private function join(string $base, string $path): string
+    {
+        return $path ? rtrim($base, '/').'/'.ltrim($path, '/') : $base;
+    }
+}

bundle/TwigExtensionBundle/TwigExtensionBundle.php

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+<?php
+
+namespace Homepage\TwigExtensionBundle;
+
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+class TwigExtensionBundle extends Bundle
+{
+}