support for named omniauth open_id strategies

lib/devise.rb

@@ -364,7 +364,8 @@ module Devise
   #
   def self.omniauth(provider, *args)
     @@helpers << Devise::OmniAuth::UrlHelpers
-    @@omniauth_configs[provider] = Devise::OmniAuth::Config.new(provider, args)
+    config = Devise::OmniAuth::Config.new(provider, args)
+    @@omniauth_configs[config.strategy_name.to_sym] = config
   end
 
   # Include helpers in the given scope to AC and AV.

lib/devise/omniauth/config.rb

@@ -10,6 +10,12 @@ module Devise
         @strategy = nil
       end
 
+      # open_id strategy can have configurable name
+      def strategy_name
+        options = @args.last.is_a?(Hash) && @args.last
+        options && options[:name] ? options[:name] : @provider
+      end
+
       def strategy_class
         ::OmniAuth::Strategies.const_get("#{::OmniAuth::Utils.camelize(@provider.to_s)}")
       end

test/omniauth/url_helpers_test.rb

@@ -35,6 +35,10 @@ class OmniAuthRoutesTest < ActionController::TestCase
     end
   end
 
+  test 'should generate authorization path for named open_id omniauth' do
+    assert_match "/users/auth/google", @controller.omniauth_authorize_path(:user, :google)
+  end
+
   test 'should generate authorization path with params' do
     assert_match "/users/auth/open_id?openid_url=http%3A%2F%2Fyahoo.com",
                   @controller.omniauth_authorize_path(:user, :open_id, :openid_url => "http://yahoo.com")

test/rails_app/config/initializers/devise.rb

@@ -172,6 +172,7 @@ Devise.setup do |config|
   # ==> OmniAuth
   config.omniauth :facebook, 'APP_ID', 'APP_SECRET', :scope => 'email,offline_access'
   config.omniauth :open_id
+  config.omniauth :open_id, :name => 'google', :identifier => 'https://www.google.com/accounts/o8/id'
 
   # ==> Warden configuration
   # If you want to use other strategies, that are not supported by Devise, or

test/routes_test.rb

@@ -96,6 +96,11 @@ class DefaultRoutingTest < ActionController::TestCase
     assert_recognizes({:controller => 'users/omniauth_callbacks', :action => 'facebook'}, {:path => 'users/auth/facebook/callback', :method => :post})
     assert_named_route "/users/auth/facebook/callback", :user_omniauth_callback_path, :facebook
 
+    # named open_id
+    assert_recognizes({:controller => 'users/omniauth_callbacks', :action => 'google'}, {:path => 'users/auth/google/callback', :method => :get})
+    assert_recognizes({:controller => 'users/omniauth_callbacks', :action => 'google'}, {:path => 'users/auth/google/callback', :method => :post})
+    assert_named_route "/users/auth/google/callback", :user_omniauth_callback_path, :google
+
     assert_raise ActionController::RoutingError do
       assert_recognizes({:controller => 'ysers/omniauth_callbacks', :action => 'twitter'}, {:path => 'users/auth/twitter/callback', :method => :get})
     end