[xwiki-devs] Automatically migrating/adding wiki documents upon upgrade

Hello devs, I'm currently trying to find the best approach to automatically upgrade an XWS instance workspaces when upgrading the XWS version. By that, I mean adding new pages to existing workspaces for example. I see at least two possible approaches : * On display of the workspace, we check that the considered pages are present, and if not either we automatically create them, either we offer a big button to "upgrade" the workspace. (the test could be done in a skin template, so that any page would trigger the upgrade) * On plugin init, we search for all workspaces and upgrade the ones in need. And we could have a marker once the upgrade is done, not to execute the query at each init. WDYT ? Are there other approaches I'm missing ? Regards, Jerome.