From a7315fce205ae04c53edaf9e0db36a5a124a6d43 Mon Sep 17 00:00:00 2001
From: Max Howell
Date: Wed, 16 Sep 2009 19:47:40 +0100
Subject: Error out if HOMEBREW_PREFIX isn't writable

---
 bin/brew | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/bin/brew b/bin/brew
index 98ae9d8cf..a34232472 100755
--- a/bin/brew
+++ b/bin/brew
@@ -65,6 +65,8 @@ begin
         puts "You must specify a formula. Search for available formulae with `brew search'."
         exit 0
       end
+      
+      raise "Cannot write to #{HOMEBREW_PREFIX}" unless HOMEBREW_PREFIX.writable?
 
       require 'brewkit'
 
-- 
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