Sadly, it was done manually. I had to migrate it to this brand new bleeding edge technology, Apache Velocity. That's not great either, but it's much less terrible than XSLT.
For that task I had to learn two templating languages at the same time to port it from one to the other. Wasn't an easy task.
Bro the project I'm on uses XSLT and the first time I saw it I legitimately thought I was having a stroke because I could not accept that anybody would be stupid and/or masochistic enough to actually want something like that.
However, I've now made it my mission to master it because it makes me feel like a high-born wizard speaking of ancient secrets in a tower high above humanity