Improved namespace activation task

lib/tasks/gitlab/activate_namespaces.rake

@@ -13,5 +13,32 @@ namespace :gitlab do
         end
       end
     end
+
+    Group.find_each(batch_size: 500) do |group|
+      if group.ensure_dir_exist
+        print '.'.green
+      else
+        print 'F'.red
+      end
+    end
+
+    git_path = Gitlab.config.git_base_path
+
+    Project.where('namespace_id IS NOT NULL').find_each(batch_size: 500) do |project|
+      next unless project.group
+
+      group = project.group
+
+      next if File.exists?(File.join(git_path, project.path_with_namespace))
+
+      next unless File.exists?(File.join(git_path, project.path))
+
+      begin
+        Gitlab::ProjectMover.new(project, '', group.path).execute
+        print '.'.green
+      rescue
+        print 'F'.red
+      end
+    end
   end
 end