From 69672ca965150196f2cd277eca5958cd574aec61 Mon Sep 17 00:00:00 2001
From: Max Howell <max@methylblue.com>
Date: Sun, 25 Mar 2012 11:07:30 +0100
Subject: [PATCH] Speed-up brew-unlink under certain conditions

This massively speeds up upgrades for certain formula, ie. formula with lots of files that aren't in the directories we link. I found upgrading android took ages before the un-tar step and it was indeed for this reason.
---
 Library/Homebrew/keg.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index c3a5443f1e..b7914224e3 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -29,7 +29,7 @@ class Keg < Pathname
 
   def unlink
     n=0
-    Pathname.new(self).find do |src|
+    %w[bin etc lib include sbin share var].map{ |d| self/d }.each do |src|
       next if src == self
       dst=HOMEBREW_PREFIX+src.relative_path_from(self)
       next unless dst.symlink?