refactor project_or_wiki

ee/lib/ee/gitlab/geo_git_access.rb

@@ -6,6 +6,12 @@ module EE
 
       GEO_SERVER_DOCS_URL = 'https://docs.gitlab.com/ee/gitlab-geo/using_a_geo_server.html'.freeze
 
+      protected
+
+      def project_or_wiki
+        @project
+      end
+
       private
 
       def push_to_read_only_message
@@ -30,10 +36,6 @@ module EE
       def current_user
         user
       end
-
-      def project_or_wiki
-        self.class.name == 'Gitlab::GitAccessWiki' ? @project.wiki : @project
-      end
     end
   end
 end

ee/lib/ee/gitlab/git_access_wiki.rb

+module EE
+  module Gitlab
+    module GitAccessWiki
+      prepend GeoGitAccess
+
+      private
+
+      def project_or_wiki
+        @project.wiki
+      end
+    end
+  end
+end

lib/gitlab/git_access_wiki.rb

 module Gitlab
   class GitAccessWiki < GitAccess
-    prepend EE::Gitlab::GeoGitAccess
+    prepend EE::Gitlab::GitAccessWiki
 
     ERROR_MESSAGES = {
       read_only:     "You can't push code to a read-only GitLab instance.",