I18n support for plugins

Rails will now automatically add locale files found in any engine's locale
directory to the I18n.load_path (i.e. files that match the glob pattern
"config/locales/**/*.{rb,yml}" relative to engine directories).

[#2325 state:committed]

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/railties/lib/rails/plugin/loader.rb b/railties/lib/rails/plugin/loader.rb
index 7ea9c7c0f3..9e2c3c7b03 100644
--- a/railties/lib/rails/plugin/loader.rb
+++ b/railties/lib/rails/plugin/loader.rb
@@ -73,6 +73,7 @@ module Rails
         def configure_engines
           if engines.any?
             add_engine_routing_configurations
+            add_engine_locales
             add_engine_controller_paths
             add_engine_view_paths
           end
@@ -84,6 +85,12 @@ module Rails
           end
         end
 
+        def add_engine_locales
+          # reverse it such that the last engine can overwrite translations from the first, like with routes
+          locale_files = engines.select(&:localized?).collect(&:locale_files).reverse.flatten
+          I18n.load_path += locale_files - I18n.load_path
+        end
+
         def add_engine_controller_paths
           ActionController::Routing.controller_paths += engines.collect {|engine| engine.controller_path }
         end