(*
    ||M||  This file is part of HELM, an Hypertextual, Electronic
    ||A||  Library of Mathematics, developed at the Computer Science
    ||T||  Department, University of Bologna, Italy.
    ||I||
    ||T||  HELM is free software; you can redistribute it and/or
    ||A||  modify it under the terms of the GNU General Public License
    \   /  version 2 or (at your option) any later version.
     \ /   This software is distributed as is, NO WARRANTY.
      V_______________________________________________________________ *)

module A = Array
module F = Filename
module Y = Sys
module U = Unix

module O = Options

let rec remove_obj name =
   try Y.remove name with Sys_error _ -> remove_dir name

and remove_dir dir =
   let map name = remove_obj (F.concat dir name) in
   let rec rmdir dir =
      U.rmdir dir; (* Sys.remove does not seem to remove empty directories *)
      rmdir (F.dirname dir)
   in
   if Y.file_exists dir then begin
      try A.iter map (Y.readdir dir); rmdir dir
      with U.Unix_error _ -> ()
   end

let objects () =
   List.iter remove_obj !O.remove