cask 'sage' do
  if MacOS.release <= :mavericks
    version '6.9'
    sha256 '21f460c90db2a9ee83d196937587de5daab8c6712b0f24366b6a1c15a8dd592b'
    # mit.edu/sage was verified as official when first introduced to the cask
    url "http://mirrors.mit.edu/sage/osx/intel/sage-#{version}-x86_64-Darwin-OSX-10.7-app.dmg"
  elsif MacOS.release <= :yosemite
    version '6.9'
    sha256 '03112bf747cf807f308d518f34c1982ca3c9599e65bf64a6782efc78136198a4'
    # mit.edu/sage was verified as official when first introduced to the cask
    url "http://mirrors.mit.edu/sage/osx/intel/sage-#{version}-x86_64-Darwin-OSX_10.10_x86_64-app.dmg"
  else
    version '7.1.beta2'
    sha256 '8e90498fb42136777c609b032933ab14ccffb79b9cd1dfb2c3f7762f32c6249b'
    # go-parts.com/sage was verified as official when first introduced to the cask
    url "http://mirrors-usa.go-parts.com/sage/sagemath/osx/intel/sage-#{version}-OSX_10.11.3-x86_64.app.dmg"
  end

  name 'Sage'
  homepage 'http://www.sagemath.org/'
  license :gpl

  depends_on macos: '>= :lion'
  depends_on arch: :x86_64

  if MacOS.release <= :yosemite
    app "Sage-#{version}.app"
    binary "Sage-#{version}.app/Contents/Resources/sage/sage"
  else
    app "SageMath-#{version}.app"
    binary "SageMath-#{version}.app/Contents/Resources/sage/sage"
  end

  zap delete: [
                '~/.sage',
                '~/Library/Logs/sage.log',
              ]

  caveats do
    files_in_usr_local
  end
end