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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 =
let many = List.length srcs > 1 in
if many && (not (Sys.file_exists dest) || not (Sys.is_directory dest))
then `Error (false, dest ^ ": 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
let docv = "DEST" in
Arg.(required & pos ~rev:true 0 (some string) None & info [] ~docv ~doc)
let cmd =
let doc = "Copy files" in
let man_xrefs =
[ `Tool "mv"; `Tool "scp"; `Page ("umask", 2); `Page ("symlink", 7) ]
in
let man =
[ `S Manpage.s_bugs;
`P "Email them to <bugs@example.org>."; ]
in
let info = Cmd.info "cp" ~version:"v1.3.0" ~doc ~man ~man_xrefs in
Cmd.v info Term.(ret (const cp $ verbose $ recurse $ force $ srcs $ dest))
let main () = exit (Cmd.eval cmd)
let () = main ()
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