if is_mac?

  ENV['EMACS_D'] = File.expand_path("~/.emacs.d")

  desc "Ensure emacs is installed and up to date"
  task :emacs => "emacs:update"

  namespace :emacs do
    task :install do
      unless Dir.exists?(ENV[:EMACS_D])
        github 'hlissner/emacs.d', '~/.emacs.d'
        Package.install "emacs", "--with-gnutls --cocoa --keep-ctags --srgb"
        Package.install "homebrew/dupes/tidy", "--HEAD"
        emacs_reqs.each { |pkg| Package.install pkg }

        sh_safe "/usr/local/bin/npm install jshint -g"
        sh_safe "/usr/local/bin/npm install jsonlint -g"
        sh_safe "cd ~/.emacs.d && cask"
      end
    end

    task :update do
      echo "Updating emacs.d & packages"
      sh_safe "cd ~/.emacs.d && git pull && cask update"
    end

    desc "Remove emacs & dependencies"
    task :remove do
      echo "Uninstalling emacs"
      Package.remove "emacs"
      Package.remove "homebrew/dupes/tidy"
      emacs_reqs.each { |pkg| Package.remove pkg }

      rm_rf "~/.emacs.d" if Dir.exists?(ENV['EMACS_D'])
    end
  end

  def emacs_reqs
    %w{aspell cask rsense}
  end

end