Why would you compile it each time? You would compile the binary once and the use it. This is what Go equivalents of this already do (e.g. Hugo).
replyYeah but its not scripty enough and has not enough easy stuff build in.
replyhttps://www.tcl-lang.org/
replyMany people have made micro Tcl’s too if you want something even lighter.
It has a built in subst command no need for a template engine!