http://nkuz2tpok7ctwd5ueer5bytj3bm42vp7lgjcsnznal3stotg6vyaakyd.onion/rbm_templates.html
$project . dest_dir The destination directory, where the resulting files will be
stored at the end of the build. This is mainly useful in build
script templates, and probably not useful in package template
files. exit_error A function that you can use to exit with an error.