From 69b91a1fa859a48d7823ba178afb5bc3f0be129f Mon Sep 17 00:00:00 2001
From: Samuel Cochran <sj26@sj26.com>
Date: Tue, 19 Jun 2012 16:25:19 +0800
Subject: [PATCH] 1.8.7 doesn't support IO.popen with options

---
 lib/mail_catcher.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/mail_catcher.rb b/lib/mail_catcher.rb
index 91c2ac8..7466a04 100644
--- a/lib/mail_catcher.rb
+++ b/lib/mail_catcher.rb
@@ -1,3 +1,5 @@
+require 'open3'
+
 require 'active_support/all'
 require 'eventmachine'
 require 'optparse'
@@ -16,7 +18,9 @@ module MailCatcher
 module_function
 
   def which command
-    IO.popen(["which", command], "r", :err => :close).read.chomp.presence
+    Open3.popen3 'which', 'command' do |stdin, stdout, stderr|
+      return stdout.read.chomp.presence
+    end
   end
 
   def mac?