Fix support without twig

DependencyInjection/NelmioApiDocExtension.php

@@ -155,6 +155,9 @@ public function load(array $configs, ContainerBuilder $container)
         $bundles = $container->getParameter('kernel.bundles');
         if (!isset($bundles['TwigBundle'])) {
             $container->removeDefinition('nelmio_api_doc.controller.swagger_ui');
+
+            $container->removeDefinition('nelmio_api_doc.render_docs.html');
+            $container->removeDefinition('nelmio_api_doc.render_docs.html.asset');
         }
         if (isset($bundles['ApiPlatformBundle']) && class_exists('ApiPlatform\Core\Documentation\Documentation')) {
             $loader->load('api_platform.xml');

Render/Html/GetNelmioAsset.php

@@ -12,17 +12,17 @@
 namespace Nelmio\ApiDocBundle\Render\Html;
 
 use Symfony\Bridge\Twig\Extension\AssetExtension;
+use Twig\Extension\AbstractExtension;
 use Twig\TwigFunction;
 
 /**
  * @internal
  */
-class GetNelmioAsset
+class GetNelmioAsset extends AbstractExtension
 {
     private $assetExtension;
     private $resourcesDir;
     private $cdnUrl;
-    private $assetsMode = AssetsMode::BUNDLE;
 
     public function __construct(AssetExtension $assetExtension)
     {
@@ -31,16 +31,16 @@ public function __construct(AssetExtension $assetExtension)
         $this->resourcesDir = __DIR__.'/../../Resources/public';
     }
 
-    public function toTwigFunction($assetsMode): TwigFunction
+    public function getFunctions()
     {
-        $this->assetsMode = $assetsMode;
-
-        return new TwigFunction('nelmioAsset', $this, ['is_safe' => ['html']]);
+        return [
+            new TwigFunction('nelmioAsset', $this, ['is_safe' => ['html']]),
+        ];
     }
 
-    public function __invoke($asset)
+    public function __invoke($defaultAssetsMode, $asset)
     {
-        [$extension, $mode] = $this->getExtension($asset);
+        [$extension, $mode] = $this->getExtension($defaultAssetsMode, $asset);
         [$resource, $isInline] = $this->getResource($asset, $mode);
         if ('js' == $extension) {
             return $this->renderJavascript($resource, $isInline);
@@ -51,15 +51,15 @@ public function __invoke($asset)
         }
     }
 
-    private function getExtension($asset)
+    private function getExtension($assetsMode, $asset)
     {
         $extension = mb_substr($asset, -3, 3, 'utf-8');
         if ('.js' === $extension) {
-            return ['js', $this->assetsMode];
+            return ['js', $assetsMode];
         } elseif ('png' === $extension) {
-            return ['png', AssetsMode::OFFLINE == $this->assetsMode ? AssetsMode::CDN : $this->assetsMode];
+            return ['png', AssetsMode::OFFLINE == $assetsMode ? AssetsMode::CDN : $assetsMode];
         } else {
-            return ['css', $this->assetsMode];
+            return ['css', $assetsMode];
         }
     }
 

Render/Html/HtmlOpenApiRenderer.php

@@ -28,13 +28,12 @@ class HtmlOpenApiRenderer implements OpenApiRenderer
     /** @var GetNelmioAsset */
     private $getNelmioAsset;
 
-    public function __construct($twig, GetNelmioAsset $getNelmioAsset)
+    public function __construct($twig)
     {
         if (!$twig instanceof \Twig_Environment && !$twig instanceof Environment) {
             throw new InvalidArgumentException(sprintf('Providing an instance of "%s" as twig is not supported.', get_class($twig)));
         }
         $this->twig = $twig;
-        $this->getNelmioAsset = $getNelmioAsset;
     }
 
     public function getFormat(): string
@@ -49,8 +48,6 @@ public function render(OpenApi $spec, array $options = []): string
             'swagger_ui_config' => [],
         ];
 
-        $this->twig->addFunction($this->getNelmioAsset->toTwigFunction($options['assets_mode']));
-
         return $this->twig->render(
             '@NelmioApiDoc/SwaggerUi/index.html.twig',
             [

Render/RenderOpenApi.php

@@ -33,6 +33,10 @@ public function __construct(ContainerInterface $generatorLocator, OpenApiRendere
     {
         $this->generatorLocator = $generatorLocator;
         foreach ($openApiRenderers as $openApiRenderer) {
+            if (null === $openApiRenderer) {
+                continue;
+            }
+
             $this->openApiRenderers[$openApiRenderer->getFormat()] = $openApiRenderer;
         }
     }

Resources/config/services.xml

@@ -28,16 +28,17 @@
         <!-- Render -->
         <service id="nelmio_api_doc.render_docs" class="Nelmio\ApiDocBundle\Render\RenderOpenApi" public="true">
             <argument type="service" id="nelmio_api_doc.generator_locator" />
-            <argument type="service" id="nelmio_api_doc.render_docs.html" />
             <argument type="service" id="nelmio_api_doc.render_docs.json" />
             <argument type="service" id="nelmio_api_doc.render_docs.yaml" />
+            <argument type="service" id="nelmio_api_doc.render_docs.html" on-invalid="ignore" />
         </service>
         <service id="nelmio_api_doc.render_docs.html" class="Nelmio\ApiDocBundle\Render\Html\HtmlOpenApiRenderer" public="false">
             <argument type="service" id="twig" />
-            <argument type="service" id="nelmio_api_doc.render_docs.html.asset" />
         </service>
         <service id="nelmio_api_doc.render_docs.html.asset" class="Nelmio\ApiDocBundle\Render\Html\GetNelmioAsset" public="false">
             <argument type="service" id="twig.extension.assets" />
+
+            <tag name="twig.extension" />
         </service>
         <service id="nelmio_api_doc.render_docs.json" class="Nelmio\ApiDocBundle\Render\Json\JsonOpenApiRenderer" public="false">
         </service>

Resources/views/SwaggerUi/index.html.twig

@@ -14,8 +14,8 @@ file that was distributed with this source code. #}
     <title>{% block title %}{{ swagger_data.spec.info.title }}{% endblock title %}</title>
 
     {% block stylesheets %}
-        {{ nelmioAsset('swagger-ui/swagger-ui.css') }}
-        {{ nelmioAsset('style.css') }}
+        {{ nelmioAsset(assets_mode, 'swagger-ui/swagger-ui.css') }}
+        {{ nelmioAsset(assets_mode, 'style.css') }}
     {% endblock stylesheets %}
 
     {% block swagger_data %}
@@ -54,7 +54,7 @@ file that was distributed with this source code. #}
     <header>
         {% block header %}
             <a id="logo" href="https://github.com/nelmio/NelmioApiDocBundle">
-                <img src="{{ nelmioAsset('logo.png') }}" alt="NelmioApiDocBundle">
+                <img src="{{ nelmioAsset(assets_mode, 'logo.png') }}" alt="NelmioApiDocBundle">
             </a>
         {% endblock header %}
     </header>
@@ -64,11 +64,11 @@ file that was distributed with this source code. #}
     {% endblock %}
 
     {% block javascripts %}
-        {{ nelmioAsset('swagger-ui/swagger-ui-bundle.js') }}
-        {{ nelmioAsset('swagger-ui/swagger-ui-standalone-preset.js') }}
+        {{ nelmioAsset(assets_mode, 'swagger-ui/swagger-ui-bundle.js') }}
+        {{ nelmioAsset(assets_mode, 'swagger-ui/swagger-ui-standalone-preset.js') }}
     {% endblock javascripts %}
 
-    {{ nelmioAsset('init-swagger-ui.js') }}
+    {{ nelmioAsset(assets_mode, 'init-swagger-ui.js') }}
 
     {% block swagger_initialization %}
         <script type="text/javascript">

Tests/Render/Html/GetNelmioAssetTest.php

@@ -14,6 +14,7 @@
 use Nelmio\ApiDocBundle\Render\Html\AssetsMode;
 use Nelmio\ApiDocBundle\Render\Html\GetNelmioAsset;
 use Nelmio\ApiDocBundle\Tests\Functional\WebTestCase;
+use Twig\TwigFunction;
 
 class GetNelmioAssetTest extends WebTestCase
 {
@@ -23,8 +24,9 @@ public function test($mode, $asset, $expectedContent)
         static::bootKernel();
         /** @var GetNelmioAsset $getNelmioAsset */
         $getNelmioAsset = static::$container->get('nelmio_api_doc.render_docs.html.asset');
-        $twigFunction = $getNelmioAsset->toTwigFunction($mode);
-        self::assertSame($expectedContent, $twigFunction->getCallable()->__invoke($asset, $mode));
+        /** @var TwigFunction */
+        $twigFunction = $getNelmioAsset->getFunctions()[0];
+        self::assertSame($expectedContent, $twigFunction->getCallable()->__invoke($mode, $asset));
     }
 
     public function provideAsset()