adding cowsay shell example

Madx

Feb 2, 2026, 10:24 PM

6L3I3N6VW23JDLYGZVJGC4POKY3HOTEXBGXXEMQ3KAAOM5EOFP7QC

Dependencies

• [2] D7MVXDG2 Adding an example

Change contents

• file addition: cowsay (d--r------)
  [2.20]
• file addition: shell.ml (----------)
  [0.18]
  + open Elpe

  + open Lwt.Syntax

  +

  + let _ =

  + let deriv =

  + object (self)

  + inherit derivation

  + method name = "cowsay-shell"

  + method! setup =

  + print_endline "Starting setup";

  + let* package = (ubuntu "cowsay")#build in

  + let outdir = (List.hd package.destdir) in

  + let change_path = "export PATH=$PATH:" ^ outdir ^ "/usr/games/" in

  + let change_cowpath = "export COWPATH=" ^ outdir ^ "/usr/share/cowsay/cows/" in

  + Lwt.return (change_path ^ "\n" ^ change_cowpath)

  + end

  + in build deriv

  +

  +