Opendetex Hombrew formula

opendetex.rb

require 'formula'

class Opendetex < Formula
  homepage 'https://code.google.com/p/opendetex/'
  url 'https://opendetex.googlecode.com/files/opendetex-2.8.1.tar.bz2'
  sha1 'a811635519dc6573735ca9d406f7032eccacd7e0'
  version "2.8.1"

  depends_on 'flex'  => :build

  def install
    system "make DESTDIR=#{prefix}"
    bin.install "detex"
  end

  def test
    system "detex -h"
  end
end