From 87c1629ebc917f5e8e6bb35980899843b68b6cca Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Mon, 26 Mar 2012 01:47:17 +0200
Subject: [PATCH] Fix isInstalled detection broken by metapackage installer

---
 src/Composer/Installer/InstallationManager.php | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/Composer/Installer/InstallationManager.php b/src/Composer/Installer/InstallationManager.php
index cc217a41f..d7708c2a7 100644
--- a/src/Composer/Installer/InstallationManager.php
+++ b/src/Composer/Installer/InstallationManager.php
@@ -100,13 +100,7 @@ class InstallationManager
      */
     public function isPackageInstalled(PackageInterface $package)
     {
-        foreach ($this->installers as $installer) {
-            if ($installer->isInstalled($package)) {
-                return true;
-            }
-        }
-
-        return false;
+        return $this->getInstaller($package->getType())->isInstalled($package);
     }
 
     /**