From 41c7432feffbfc3607a51fed6e4f29ae7224c639 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Sat, 13 Oct 2012 17:18:47 +0200
Subject: [PATCH] Do not fetch from repo for packages that obviously can not be
 there

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

diff --git a/src/Composer/Repository/ComposerRepository.php b/src/Composer/Repository/ComposerRepository.php
index 6fe23e9ae..f6339e32e 100644
--- a/src/Composer/Repository/ComposerRepository.php
+++ b/src/Composer/Repository/ComposerRepository.php
@@ -196,6 +196,10 @@ class ComposerRepository extends ArrayRepository implements NotifiableRepository
 
     public function whatProvides($name)
     {
+        if ($name === 'php' || in_array(substr($name, 0, 4), array('ext-', 'lib-'), true) || $name === '__root__') {
+            return array();
+        }
+
         if (isset($this->providers[$name])) {
             return $this->providers[$name];
         }