From 6fce4348570f3022c987de9f2f3aefb4b7d5b483 Mon Sep 17 00:00:00 2001
From: Jack Nagel <jacknagel@gmail.com>
Date: Thu, 3 Nov 2011 21:08:59 -0500
Subject: [PATCH] Add utility methods to determine clang version

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
---
 Library/Homebrew/utils.rb | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Library/Homebrew/utils.rb b/Library/Homebrew/utils.rb
index 48068b9e19..cca54f229e 100644
--- a/Library/Homebrew/utils.rb
+++ b/Library/Homebrew/utils.rb
@@ -340,6 +340,20 @@ module MacOS extend self
     end
   end
 
+  def clang_version
+    @clang_version ||= if File.exist? "/usr/bin/clang"
+      `/usr/bin/clang --version` =~ /clang version (\d\.\d)/
+      $1
+    end
+  end
+
+  def clang_build_version
+    @clang_build_version ||= if File.exist? "/usr/bin/clang"
+      `/usr/bin/clang --version` =~ %r[tags/Apple/clang-(\d{3}(\.\d)*)]
+      $1
+    end
+  end
+
   def x11_installed?
     Pathname.new('/usr/X11/lib/libpng.dylib').exist?
   end