Dismissing full-blown programming languages is a mistake IMHO. Sometimes it's useful to generate configuration (e.g. starting from a template and to build configuration for prod vs QA or for various deployment targets).

If you have a full-blown programming language you can sprinkle a little bit of code in the template and get express everything you need in a clean way. If all you have is a templating language you have to shoehorn your logic into it (likely making a mess) or use the templating language + a "real" programming language.