From 4c38d151100bd1293a668bfa11d7c38abe7c72c2 Mon Sep 17 00:00:00 2001
From: Misty De Meo <mistydemeo@gmail.com>
Date: Fri, 20 Jul 2012 11:00:48 -0500
Subject: [PATCH] brew unlink: don't unlink an unlinked formula

This caused weird issues in the case that multiple formulae provide
the same file.
---
 Library/Homebrew/cmd/unlink.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Library/Homebrew/cmd/unlink.rb b/Library/Homebrew/cmd/unlink.rb
index 12b0377815..692278fb0d 100644
--- a/Library/Homebrew/cmd/unlink.rb
+++ b/Library/Homebrew/cmd/unlink.rb
@@ -3,6 +3,7 @@ module Homebrew extend self
     raise KegUnspecifiedError if ARGV.named.empty?
 
     ARGV.kegs.each do |keg|
+      return if !keg.linked?
       print "Unlinking #{keg}... "
       puts "#{keg.unlink} links removed"
     end