Merge pull request #197 from gregurco/plugins_in_sf4

Plugins in SF4

README.md

@@ -132,14 +132,44 @@ $response = $client->get('/users');
 This bundle allows to register and integrate plugins to extend functionality of guzzle and this bundle.
 
 ### Usage
+
+#### Symfony 2.x and 3.x
 All plugins will be activated/connected through bundle constructor in AppKernel, like this:
 
 ``` php 
 new EightPoints\Bundle\GuzzleBundle\EightPointsGuzzleBundle([
-    new Gregurco\Bundle\GuzzleBundleWssePlugin\GuzzleBundleWssePlugin(),
+    new Gregurco\Bundle\GuzzleBundleOAuth2Plugin\GuzzleBundleOAuth2Plugin(),
 ])
 ```
 
+#### Symfony 4
+The registration of bundles was changed in Symfony 4 and now you have to change `src/Kernel.php` to achieve the same functionality.  
+Find next lines:
+
+```php
+foreach ($contents as $class => $envs) {
+    if (isset($envs['all']) || isset($envs[$this->environment])) {
+        yield new $class();
+    }
+}
+```
+
+and replace them by:
+
+```php
+foreach ($contents as $class => $envs) {
+    if (isset($envs['all']) || isset($envs[$this->environment])) {
+        if ($class === \EightPoints\Bundle\GuzzleBundle\EightPointsGuzzleBundle::class) {
+            yield new $class([
+                new \Gregurco\Bundle\GuzzleBundleOAuth2Plugin\GuzzleBundleOAuth2Plugin(),
+            ]);
+        } else {
+            yield new $class();
+        }
+    }
+}
+```
+
 ### Known and Supported Plugins
 - [gregurco/GuzzleBundleWssePlugin][6]
 - [gregurco/GuzzleBundleCachePlugin][7]