use sqlite database for install process

core/lib/Thelia/Core/Thelia.php

@@ -69,10 +69,16 @@ class Thelia extends Kernel
 
     protected function initPropel()
     {
-        if (file_exists(THELIA_ROOT . '/local/config/database.yml') === false) {
-            return ;
-        }
-
+        if (defined('THELIA_INSTALL_MODE') === true) {
+            $serviceContainer = Propel::getServiceContainer();
+            $serviceContainer->setAdapterClass('thelia', 'sqlite');
+            $manager = new ConnectionManagerSingle();
+            $manager->setConfiguration(array(
+                "classname" => "\Propel\Runtime\Connection\PropelPDO",
+                "dsn" => "sqlite:".THELIA_ROOT . "/install/thelia.sqlite"
+            ));
+            $serviceContainer->setConnectionManager('thelia', $manager);
+        } else {
             $definePropel = new DefinePropel(new DatabaseConfiguration(),
                 Yaml::parse(THELIA_ROOT . '/local/config/database.yml'));
             $serviceContainer = Propel::getServiceContainer();
@@ -88,6 +94,9 @@ class Thelia extends Kernel
             }
         }
 
+
+    }
+
     /**
      * dispatch an event when application is boot
      */