Thread:Project:Support desk/How to sync content between two Mediawiki installations?

Is there a reliable way to sync (copy and merge) the content of two different Mediawiki installations?

I have an internal installation where we work on most the time, but some external contractors won't get access to the internal installation, so we are thinking about getting them their own installation and mirror parts of the content to that installation. Problem is, doing this manually will be a pain, so I'm looking for a way to automate this procedure.

Sync should be in both directions, as both parties can create and update content.

I hoped there would be an extension for that, but couldn't find one yet.