From cc78050dc5607ac827429fe27686f71a7e77716c Mon Sep 17 00:00:00 2001
From: Adam Vandenberg <flangy@gmail.com>
Date: Sat, 3 Mar 2012 15:50:24 -0800
Subject: [PATCH] add which method

---
 Library/Homebrew/utils.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index e469260632..c088877403 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -138,6 +138,15 @@ def puts_columns items, star_items=[]
   end
 end
 
+def which cmd
+  path = `/usr/bin/which #{cmd}`.chomp
+  if path.empty?
+    nil
+  else
+    Pathname.new(path)
+  end
+end
+
 def which_editor
   editor = ENV['HOMEBREW_EDITOR'] || ENV['EDITOR']
   # If an editor wasn't set, try to pick a sane default