require 'formula'

class Ace < Formula
  homepage 'http://www.cse.wustl.edu/~schmidt/ACE.html'
  url 'http://download.dre.vanderbilt.edu/previous_versions/ACE-6.0.3.tar.bz2'
  md5 'c38cff517ee80825a37f3b1e84f15229'

  def install
    # ACE has two methods of compilation, "traditional" and ./configure.
    # The "traditional" method has consistently given better results
    # for the last 5 years, so although awkward to use on OSX, we use
    # it anyway.

    # First, we figure out the names of header files and make files
    # for this version of OSX.
    ver = %x[sw_vers -productVersion].chomp.split(".")
    ver = ver.slice(0).to_i*100 + ver.slice(1).to_i
    name = { 1002 => 'macosx', 1003 => 'macosx_panther',
             1004 => 'macosx_tiger', 1005 => 'macosx_leopard',
             1006 => 'macosx_snowleopard',
             1007 => 'macosx_lion' }[ver]
    makefile = "platform_#{name}.GNU"
    header = "config-" + name.sub('_','-') + ".h"

    # Now, we give those files the appropriate standard names.
    ln_sf header, "ace/config.h"
    ln_sf makefile, "include/makeinclude/platform_macros.GNU"

    # Set up the environment the way ACE expects during build.
    root=Dir.pwd
    ENV['ACE_ROOT']=root
    ENV['DYLD_LIBRARY_PATH']="#{root}/ace:#{root}/lib"

    # Done! We go ahead and build.
    cd "ace" do
      system "make", "-f", "GNUmakefile.ACE", "INSTALL_PREFIX=#{prefix}",
         "LDFLAGS=", "DESTDIR=", "INST_DIR=/ace",
         "debug=0", "shared_libs=1", "static_libs=0", "install"
    end
  end
end