module Roda::RodaPlugins::PermissionsPolicy

def self.configure(app, opts=OPTS)
  policy = app.opts[:permissions_policy] = if policy = app.opts[:permissions_policy]
    policy.dup
  else
    Policy.new
  end
  if default = opts[:default]
    SUPPORTED_SETTINGS.each do |setting|
      policy.send(setting.gsub('-', '_'), *default)
    end
  end
  yield policy if defined?(yield)
  policy.freeze
end