Redmine

Do you mean something like Rails' asset pipeline to concatenate and compress existing scripts to one single file when sending them to the client?
https://guides.rubyonrails.org/asset_pipeline.html

Bernhard Ganslmeier, XD I don't know how it works, but whatever will get the job done. I think actually merging files into application.css by copying and inserting the contents of others, and removing em would be better IF your method wouldn't need to bother the server with merging those on each request, because that's minus brownie points to performance. Alternatively a script that would do it upon an only the first installation then. :D