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(* Example from the documentation, this code is in public domain. *)
(* Implementation, we check the dest argument and print the args *)
let cp verbose recurse force srcs dest =
if List.length srcs > 1 &&
(not (Sys.file_exists dest) || not (Sys.is_directory dest))
then
`Error (false, dest ^ " is not a directory")
else
`Ok (Printf.printf
"verbose = %b\nrecurse = %b\nforce = %b\nsrcs = %s\ndest = %s\n"
verbose recurse force (String.concat ", " srcs) dest)
(* Command line interface *)
open Cmdliner;;
let verbose =
let doc = "Print file names as they are copied." in
Arg.(value & flag & info ["v"; "verbose"] ~doc)
let recurse =
let doc = "Copy directories recursively." in
Arg.(value & flag & info ["r"; "R"; "recursive"] ~doc)
let force =
let doc = "If a destination file cannot be opened, remove it and try again."in
Arg.(value & flag & info ["f"; "force"] ~doc)
let srcs =
let doc = "Source file(s) to copy." in
Arg.(non_empty & pos_left ~rev:true 0 file [] & info [] ~docv:"SOURCE" ~doc)
let dest =
let doc = "Destination of the copy. Must be a directory if there is more
than one $(i,SOURCE)." in
Arg.(required & pos ~rev:true 0 (some string) None & info [] ~docv:"DEST"
~doc)
let cmd =
let doc = "copy files" in
let man = [
`S "BUGS";
`P "Email them to <hehey at example.org>.";
`S "SEE ALSO";
`P "$(b,mv)(1), $(b,scp)(1), $(b,umask)(2), $(b,symlink)(7)" ]
in
Term.(ret (pure cp $ verbose $ recurse $ force $ srcs $ dest)),
Term.info "cp" ~version:"1.6.1" ~doc ~man
let () = match Term.eval cmd with `Error _ -> exit 1 | _ -> exit 0
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