class Guard::Internals::Session

def guardfile_scope(scope)
  opts = scope.dup
  groups = Array(opts.delete(:groups))
  group = Array(opts.delete(:group))
  @guardfile_group_scope = Array(groups) + Array(group)
  plugins = Array(opts.delete(:plugins))
  plugin = Array(opts.delete(:plugin))
  @guardfile_plugin_scope = Array(plugins) + Array(plugin)
  fail "Unknown options: #{opts.inspect}" unless opts.empty?
end