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open Cmdliner
let kind =
let doc = "Kind of entity" in
Arg.(value & opt (some string) None & info ["k";"kind"] ~doc)
let speed =
let doc = "Movement $(docv) in m/s" in
Arg.(value & opt int 2 & info ["speed"] ~doc ~docv:"SPEED")
let birds =
let bird =
let doc = "Use $(docv) specie." in
Arg.(value & pos 0 string "pigeon" & info [] ~doc ~docv:"BIRD")
in
let fly =
let info = Cmd.info "fly" ~doc:"Fly birds." in
Cmd.v info Term.(const (fun n v -> ()) $ bird $ speed)
in
let land' =
let info = Cmd.info "land" ~doc:"Land birds." in
Cmd.v info Term.(const (fun n -> ()) $ bird)
in
let info = Cmd.info "birds" ~doc:"Operate on birds." in
Cmd.group ~default:Term.(const (fun k -> ()) $ kind) info [fly; land']
let mammals =
let man_xrefs = [`Main; `Cmd "birds" ] in
let info = Cmd.info "mammals" ~doc:"Operate on mammals." ~man_xrefs in
Cmd.v info Term.(const (fun () -> ()) $ const ())
let fishs =
let name' =
let doc = "Use fish named $(docv)." in
Arg.(value & pos 0 (some string) None & info [] ~doc ~docv:"NAME")
in
let info = Cmd.info "fishs" ~doc:"Operate on fishs." in
Cmd.v info Term.(const (fun n -> ()) $ name')
let camels =
let herd =
let doc = "Find in herd $(docv)." and docv = "HERD" in
let deprecated = "deprecated, herds are ignored." in
Arg.(value & pos 0 (some string) None & info [] ~deprecated ~doc ~docv)
in
let bactrian =
let deprecated = "deprecated, use nothing instead." in
let doc = "Specify a bactrian camel." in
let env = Cmd.Env.info "BACTRIAN" ~deprecated in
Arg.(value & flag & info ["bactrian"; "b"] ~deprecated ~env ~doc)
in
let deprecated = "deprecated, use 'mammals' instead."
in
let info = Cmd.info "camels" ~deprecated ~doc:"Operate on camels." in
Cmd.v info Term.(const (fun n h -> ()) $ bactrian $ herd)
let cmd =
let info = Cmd.info "test_nest" ~version:"X.Y.Z" in
Cmd.group info [birds; mammals; fishs; camels]
let () = exit (Cmd.eval cmd)
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