From fc4cc79a525fa7e36089625c35a727b4957cd3bf Mon Sep 17 00:00:00 2001
From: Christian Schiffler <c.schiffler@cyberspectrum.de>
Date: Thu, 7 Nov 2013 23:33:38 +0100
Subject: [PATCH] Fix cache directory upgrading - do not try to remove the
 destination directory.

---
 src/Composer/Factory.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Factory.php b/src/Composer/Factory.php
index 99b5a692b..38949c7b6 100644
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@@ -118,7 +118,9 @@ class Factory
                             @rename($child, $dir.'/'.basename($child));
                         }
                     }
-                    @rmdir($oldPath);
+                    if ($config->get('cache-dir') != $oldPath) {
+                        @rmdir($oldPath);
+                    }
                 }
             }
         }