brew install --env=std --HEAD screen-vertical-split

screen-vertical-split.rb

require 'formula'

class ScreenVerticalSplit < Formula
  homepage 'http://www.gnu.org/software/screen/'
  url 'http://ftp.gnu.org/gnu/screen/screen-4.0.3.tar.gz'
  mirror 'http://ftp.gnu.org/gnu/screen/screen-4.0.3.tar.gz'
  md5 '8506fd205028a96c741e4037de6e3c42'

  head 'git://git.savannah.gnu.org/screen.git', :branch => 'master'

  if ARGV.build_head?
    depends_on 'autoconf'
    depends_on 'libtool'
    depends_on 'automake'
  end

  def install
    if ARGV.build_head?
      Dir.chdir('src')
      system "./autogen.sh"
    end

    system "./configure", "--enable-colors256",
                          "--prefix=#{prefix}",
                          "--mandir=#{man}",
                          "--infodir=#{info}"
    if ARGV.build_head?
      system 'bash osdef.sh'
    end
    system "make"
    system "make install"
  end
end