But you can declaratively specify a full system configuration in a real programming language, too. This is precisely what the GNU Guix system configuration API

But you can declaratively specify a full system configuration in a real programming language, too. This is precisely what the GNU Guix system configuration API does, for example. You write OS configs in functional, declarative Scheme code. http://www.gnu.org/software/guix/manual/html_node/System-Configuration.html#System-Configuration http://www.gnu.org/software/guix/manual/html_node/System-Con...