I use redo to build the menus for a GOPHER site. It's the same principle. Make changes; run redo; menus get updated automatically. I also use it to rebuild the indexes for package repositories after making changes.

See gopher://jdebp.info/1/Repository/freebsd/ under "how this site is built" and gopher://jdebp.info/1/Repository/debian/dists/ .

See also gopher://jdebp.info/h/Softwares/djbwares/guide/gopherd.html .