A patch to Homebrew to preserve source tree

homebrew-preserve-sourcetree.patch

diff --git a/Library/Homebrew/extend/fileutils.rb b/Library/Homebrew/extend/fileutils.rb
index 7037748..b10b97c 100644
--- a/Library/Homebrew/extend/fileutils.rb
+++ b/Library/Homebrew/extend/fileutils.rb
@@ -21,7 +21,7 @@ module FileUtils extend self
     yield
   ensure
     cd prevd if prevd
-    ignore_interrupts{ rm_r tempd } if tempd
+    $stderr.puts "Remove #{tempd} if everything went alright" if tempd
   end
 
   # A version of mkdir that also changes to that folder in a block.