SessionsController - Devise + Ominauth + Shibboleth

sessions_controller.rb

class Users::SessionsController < Devise::SessionsController

  def new
    store_location_for(:user, request.referrer) # return to previous page after authn
    if Ddr::Auth.require_shib_user_authn
      # don't want the "sign in or sign up" flash in this case
      flash.discard(:alert)
      redirect_to user_omniauth_authorize_path(:shibboleth)
    else
      super
    end
  end

  def after_sign_out_path_for(scope)
    return Ddr::Auth.sso_logout_url if Ddr::Auth.require_shib_user_authn
    super
  end

end