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(* Example from the documentation, this code is in public domain. *)
(* Implementation of the command, we just print the args. *)
type prompt = Always | Once | Never
let prompt_str = function
| Always -> "always" | Once -> "once" | Never -> "never"
let rm prompt recurse files =
Printf.printf "prompt = %s\nrecurse = %B\nfiles = %s\n"
(prompt_str prompt) recurse (String.concat ", " files)
(* Command line interface *)
open Cmdliner
let files = Arg.(non_empty & pos_all file [] & info [] ~docv:"FILE")
let prompt =
let always =
let doc = "Prompt before every removal." in
Always, Arg.info ["i"] ~doc
in
let never =
let doc = "Ignore nonexistent files and never prompt." in
Never, Arg.info ["f"; "force"] ~doc
in
let once =
let doc = "Prompt once before removing more than three files, or when
removing recursively. Less intrusive than $(b,-i), while
still giving protection against most mistakes."
in
Once, Arg.info ["I"] ~doc
in
Arg.(last & vflag_all [Always] [always; never; once])
let recursive =
let doc = "Remove directories and their contents recursively." in
Arg.(value & flag & info ["r"; "R"; "recursive"] ~doc)
let cmd =
let doc = "Remove files or directories" in
let man = [
`S Manpage.s_description;
`P "$(tname) removes each specified $(i,FILE). By default it does not
remove directories, to also remove them and their contents, use the
option $(b,--recursive) ($(b,-r) or $(b,-R)).";
`P "To remove a file whose name starts with a $(b,-), for example
$(b,-foo), use one of these commands:";
`Pre "$(mname) $(b,-- -foo)"; `Noblank;
`Pre "$(mname) $(b,./-foo)";
`P "$(tname) removes symbolic links, not the files referenced by the
links.";
`S Manpage.s_bugs; `P "Report bugs to <bugs@example.org>.";
`S Manpage.s_see_also; `P "$(b,rmdir)(1), $(b,unlink)(2)" ]
in
let info = Cmd.info "rm" ~version:"v1.1.1" ~doc ~man in
Cmd.v info Term.(const rm $ prompt $ recursive $ files)
let main () = exit (Cmd.eval cmd)
let () = main ()
|
