From 44ccd122c25639ddd917c1aaed53b9e33b2ffa7d Mon Sep 17 00:00:00 2001
From: Misty De Meo <mistydemeo@gmail.com>
Date: Fri, 6 Jul 2012 10:11:19 -0500
Subject: [PATCH] Keg#unlink: skip find for non-extant files

In 1.8, Pathname.find would work (and do nothing) if the
source path didn't exist. In 1.9 this throws an exception
instead, so check whether the file exists before trying.
---
 Library/Homebrew/keg.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index b0f6f0e7b0..f9aba2e0ee 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -30,6 +30,7 @@ class Keg < Pathname
   def unlink
     n=0
     %w[bin etc lib include sbin share var].map{ |d| self/d }.each do |src|
+      next unless src.exist?
       src.find do |src|
         next if src == self
         dst=HOMEBREW_PREFIX+src.relative_path_from(self)