From 30bbb93f2189be88c799bfdb257216909bcd3fde Mon Sep 17 00:00:00 2001
From: Xu Cheng <xucheng@me.com>
Date: Fri, 15 Jul 2016 15:12:05 +0800
Subject: [PATCH] tab: add missing methods

This makes `Tab` compatible with `BuildOptions`.
---
 Library/Homebrew/tab.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Library/Homebrew/tab.rb b/Library/Homebrew/tab.rb
index 58eee94780..b31bfbdda3 100644
--- a/Library/Homebrew/tab.rb
+++ b/Library/Homebrew/tab.rb
@@ -179,6 +179,18 @@ class Tab < OpenStruct
     include?("32-bit")
   end
 
+  def head?
+    spec == :head
+  end
+
+  def devel?
+    spec == :devel
+  end
+
+  def stable?
+    spec == :stable
+  end
+
   def used_options
     Options.create(super)
   end