Added the ability to authenticate using an OAuth token

Author: Lee Nugent

lib/Gitlab/Client.php

@@ -44,6 +44,12 @@ class Client
      */
     const AUTH_HTTP_TOKEN = 'http_token';
 
+    /**
+     * Constant for authentication method. Indicates the OAuth method with a key
+     * obtain using Gitlab's OAuth provider.
+     */
+    const AUTH_OAUTH_TOKEN = 'oauth_token';
+
     /**
      * @var array
      */

lib/Gitlab/HttpClient/Listener/AuthListener.php

@@ -76,6 +76,13 @@ public function preSend(RequestInterface $request)
 
                 $request->fromUrl(new Url($url));
                 break;
+
+            case Client::AUTH_OAUTH_TOKEN:
+                $request->addHeader('Authorization: Bearer '.$this->token);
+                if (!is_null($this->sudo)) {
+                    $request->addHeader('SUDO: '.$this->sudo);
+                }
+                break;
         }
     }