From 4eb5f737186db59d075f1d56361ea0722629d914 Mon Sep 17 00:00:00 2001
From: Nils Adermann <naderman@naderman.de>
Date: Sun, 1 Jul 2012 18:50:46 +0200
Subject: [PATCH] Only create alias package in repositories on the fly if
 necessary, fixes #793

---
 src/Composer/Repository/ArrayRepository.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Repository/ArrayRepository.php b/src/Composer/Repository/ArrayRepository.php
index d19584b7e..590fc3009 100644
--- a/src/Composer/Repository/ArrayRepository.php
+++ b/src/Composer/Repository/ArrayRepository.php
@@ -105,7 +105,10 @@ class ArrayRepository implements RepositoryInterface
 
         // create alias package on the fly if needed
         if ($package->getAlias()) {
-            $this->addPackage($this->createAliasPackage($package));
+            $alias = $this->createAliasPackage($package);
+            if (!$this->hasPackage($alias)) {
+                $this->addPackage($alias);
+            }
         }
     }