libogg, libvorbis: Add --HEAD

Closes #11146.

Signed-off-by: Charlie Sharpsteen <source@sharpsteen.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/Library/Formula/libvorbis.rb b/Library/Formula/libvorbis.rb
index 22325d2d6..03c83d6e0 100644
--- a/Library/Formula/libvorbis.rb
+++ b/Library/Formula/libvorbis.rb
@@ -5,10 +5,25 @@ class Libvorbis < Formula
   md5 '798a4211221073c1409f26eac4567e8b'
   homepage 'http://vorbis.com'
 
+  head 'http://svn.xiph.org/trunk/vorbis', :using => :svn
+
   depends_on 'pkg-config' => :build
   depends_on 'libogg'
 
+  if ARGV.build_head?
+    depends_on "automake" => :build
+
+    if MacOS.xcode_version >= "4.3"
+      depends_on "libtool" => :build
+      depends_on "autoconf" => :build
+    end
+  end
+
   def install
+    if ARGV.build_head?
+      system "./autogen.sh"
+    end
+
     system "./configure", "--disable-debug", "--disable-dependency-tracking",
                           "--prefix=#{prefix}"
     system "make install"