From 7d3274224aa5e4b1b7efb27a3fb02291546b9590 Mon Sep 17 00:00:00 2001
From: Fred Emmott <fredemmott@fb.com>
Date: Tue, 18 Mar 2014 16:21:41 -0700
Subject: [PATCH] Only look for .hh files at runtime if using HHVM

The ClassMap generator will look regardless, but that's not a runtime
cost, so seems desirable (in case composer install/update needs to be
called with php5 for some resaon)
---
 src/Composer/Autoload/ClassLoader.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Composer/Autoload/ClassLoader.php b/src/Composer/Autoload/ClassLoader.php
index 150cfc881..e27edeb1d 100644
--- a/src/Composer/Autoload/ClassLoader.php
+++ b/src/Composer/Autoload/ClassLoader.php
@@ -292,7 +292,7 @@ class ClassLoader
         }
 
         $file = $this->findFileWithExtension($class, '.php');
-        if ($file === null) {
+        if ($file === null && defined('HHVM_VERSION')) {
           // Indicates a Hack file (hacklang.org)
           $file = $this->findFileWithExtension($class, '.hh');
         }