task :cleanup, :except => { :no_release => true } do
  count = fetch(:keep_releases, 5).to_i
  directories = (releases - releases.last(count)).map { |release|
      File.join(releases_path, release) }.join(" ")
  if directories.strip.empty? then
    puts "No old repositories to remove..."
  else
    puts "Removing old repositories..."
    run "rm -rf #{directories}"
  end
end