An Exuberant Ctags formula that works with Vim

ctags.rb

require 'formula'

# An older version, 5.6, is necessary to work with Vim's Taglist plugin.
class Ctags < Formula
  url 'http://downloads.sourceforge.net/ctags/ctags-5.6.tar.gz'
  homepage 'http://ctags.sourceforge.net/'
  md5 '9026a6c6950751bc4fd1be37e8a2070f'

  head 'https://ctags.svn.sourceforge.net/svnroot/ctags/trunk'

  def install
    system "autoheader" if ARGV.build_head?
    system "autoconf" if ARGV.build_head?
    system "./configure", "--prefix=#{prefix}",
                          "--enable-macro-patterns",
                          "--mandir=#{man}",
                          "--with-readlib"
    system "make install"
  end
end