From e38dd0b7642e71e01c15bff6ed6641b7dbab1d7e Mon Sep 17 00:00:00 2001
From: Samuel John <github@SamuelJohn.de>
Date: Tue, 27 Aug 2013 10:25:23 +0200
Subject: [PATCH] Don't consider files in the Cellar as Racks

Otherwiese a `Cellar/.DS_Store` may lead to an error about
`.ds_store.rb` not found during `brew upgrade`.
---
 Library/Homebrew/formula.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index c54df055da..cd899d45c4 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -357,7 +357,7 @@ class Formula
   def self.installed
     return [] unless HOMEBREW_CELLAR.directory?
 
-    HOMEBREW_CELLAR.children.map do |rack|
+    HOMEBREW_CELLAR.subdirs.map do |rack|
       begin
         factory(rack.basename.to_s)
       rescue FormulaUnavailableError