Homebrew formula for GNU R GUI

gnur_gui.rb

require 'formula'

class RApp < Formula
  ARCHS = "x86_64"
  SYSTEM = "SnowLeopard64"

  url 'http://cran.r-project.org/bin/macosx/Mac-GUI-1.62.tar.gz'
  homepage 'http://cran.r-project.org/bin/macosx/'
  sha1 '3f7ef605076cf537b304a05d979ae44d3cb054ab'
  keg_only "This is a gui app (and a brew antipattern as such, but whatev)"

  depends_on 'r'

  def install
    # R.app has its R framework path hardcoded. I wouldn't hardcode brew's R
    # framework path either if I could find a way to get the path to it.
    # This won't execute in Homebrew, so just create the link manually
    if !File.exist?("/Library/Frameworks/R.framework")
      ln_s "#{HOMEBREW_PREFIX}/Cellar/r/3.0.1/R.framework",
           "/Library/Frameworks/R.framework"
    end

    system "xcodebuild -target R -configuration #{SYSTEM} -project R.xcodeproj"+
           " ARCHS=#{ARCHS}"

    mv "build/#{SYSTEM}/R.app", "/Applications/R.app"
  end
end