Zeitwerk's readme gives this example for collapsing namespaces:
booking.rb -> Booking
booking/actions/create.rb -> Booking::Create
To make it work that way, configure Zeitwerk to collapse said directory:
loader.collapse("#{__dir__}/booking/actions")
But I don't want to cut out the middle, I want to bring everything to root level namespacing.
I.e. instead of Booking::Actions::Create or Booking::Create I just want Create. How do I do this?
collapse just removes the last directory in the path given, so if you want to remove two directories, run collapse for each directory.
E.g.
If you have /app/a/b/c/d.rb then you can bring d.rb up to no namespacing with:
loader.collapse("app/a/b/c")
loader.collapse("app/a/b")
Zeitwerk will look at d.rb as if it's within app/a/, and all subfolders of app/ are considered root level