Add groonga:sync task

lib/groonga/client/railtie.rb

@@ -20,6 +20,10 @@ module Groonga
   class Client
     # @private
     class Railtie < ::Rails::Railtie
+      rake_tasks do
+        load "groonga/client/railties/groonga.rake"
+      end
+
       initializer "groonga-client.eager_load" do |app|
         app.paths.add("app/searchers",
                       eager_load: true,

lib/groonga/client/railties/groonga.rake

@@ -0,0 +1,26 @@
+# -*- ruby -*-
+#
+# Copyright (C) 2016  Kouhei Sutou <kou@clear-code.com>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+namespace :groonga do
+  task :sync do
+    Rails.application.eager_load!
+    ObjectSpace.each_object(Class) do |klass|
+      klass.sync if klass < Groonga::Client::Searcher
+    end
+  end
+end