Add a config option to configure the base of the documentation

DependencyInjection/Configuration.php

@@ -22,6 +22,11 @@ final class Configuration implements ConfigurationInterface
         $treeBuilder
             ->root('nelmio_api_doc')
             ->children()
+                ->arrayNode('documentation')
+                    ->info('The documentation used as base')
+                    ->example(['info' => ['title' => 'My App']])
+                    ->prototype('variable')->end()
+                ->end()
                 ->scalarNode('source_folder')->defaultValue('%kernel.root_dir%/../src')->end()
                 ->arrayNode('routes')
                     ->info('Filter the routes that are documented')

DependencyInjection/NelmioApiDocExtension.php

@@ -54,5 +54,8 @@ final class NelmioApiDocExtension extends Extension
         if (isset($bundles['ApiPlatformBundle']) && class_exists('ApiPlatform\Core\Documentation\Documentation')) {
             $loader->load('api_platform.xml');
         }
+
+        // Import the base configuration
+        $container->getDefinition('nelmio_api_doc.describers.config')->replaceArgument(0, $config['documentation']);
     }
 }

Resources/config/services.xml

@@ -14,7 +14,13 @@
             <argument type="service" id="controller_name_converter" />
         </service>
 
-        <!-- Extractors -->
+        <!-- Describers -->
+        <service id="nelmio_api_doc.describers.config" class="Nelmio\ApiDocBundle\Describer\ExternalDocDescriber" public="false">
+            <argument type="collection" />
+
+            <tag name="nelmio_api_doc.describer" priority="1000" />
+        </service>
+
         <service id="nelmio_api_doc.describers.route.filtered_route_collection_builder" class="Nelmio\ApiDocBundle\Routing\FilteredRouteCollectionBuilder" public="false">
             <argument type="collection" /> <!-- Path patterns -->
         </service>

Tests/Functional/FunctionalTest.php

@@ -17,6 +17,11 @@ use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
 
 class FunctionalTest extends WebTestCase
 {
+    public function testConfiguredDocumentation()
+    {
+        $this->assertEquals('My Test App', $this->getSwaggerDefinition()->getInfo()->getTitle());
+    }
+
     public function testUndocumentedAction()
     {
         $paths = $this->getSwaggerDefinition()->getPaths();

Tests/Functional/TestKernel.php

@@ -62,6 +62,11 @@ class TestKernel extends Kernel
 
         // Filter routes
         $c->loadFromExtension('nelmio_api_doc', [
+            'documentation' => [
+                'info' => [
+                    'title' => 'My Test App',
+                ],
+            ],
             'source_folder' => '%kernel.root_dir%',
             'routes' => [
                 'path_patterns' => ['^/api(?!/admin)'],