Prawn was considered and IIRC unfortunately it has very limited styling support. It looks like there are only commercial and quite expensive options for progra

Prawn was considered and IIRC unfortunately it has very limited styling support. It looks like there are only commercial and quite expensive options for programmatic generation (Antenna House: XSL-FO, Prince: CSS). Apart from that, the one option that works appears to be Apache FOP. It’s built on Java and uses XSL-FO, which is somewhat limited and seemingly on the way to becoming outdated.