(******************************************************************************)

(*  ocaml-fileutils: files and filenames common operations                    *)

(*                                                                            *)

(*  Copyright (C) 2003-2014, Sylvain Le Gall                                  *)

(*                                                                            *)

(*  This library is free software; you can redistribute it and/or modify it   *)

(*  under the terms of the GNU Lesser General Public License as published by  *)

(*  the Free Software Foundation; either version 2.1 of the License, or (at   *)

(*  your option) any later version, with the OCaml static compilation         *)

(*  exception.                                                                *)

(*                                                                            *)

(*  This library is distributed in the hope that it will be useful, but       *)

(*  WITHOUT ANY WARRANTY; without even the implied warranty of                *)

(*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the file         *)

(*  COPYING for more details.                                                 *)

(*                                                                            *)

(*  You should have received a copy of the GNU Lesser General Public License  *)

(*  along with this library; if not, write to the Free Software Foundation,   *)

(*  Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA             *)

(******************************************************************************)

open FileUtilTypes

open FilePath

open FileUtilMisc

open FileUtilPWD

open FileUtilRM

open FileUtilCP

open FileUtilTEST

exception MvError of string

type mv_error =

  [ `Exc of exn

  | `MvCp of filename * filename * string * cp_error

  | `MvRm of  filename * string * rm_error

  | `NoSourceFile ]

let rec mv

      ?(error=fun str _ -> raise (MvError str))

      ?(force=Force)

      fln_src fln_dst =

  let handle_error, _ =

    handle_error_gen "mv" error

      (function

         | `NoSourceFile ->

             "Cannot move an empty list of files."

         | `MvCp (fn_src, fn_dst, str, _) ->

             Printf.sprintf

               "Recursive error in 'mv %s %s' for 'cp %s %s': %s"

               fn_src fn_dst fn_src fn_dst str

         | `MvRm (fn, str, _) ->

             Printf.sprintf "Recursive error in 'mv %s ..' for 'rm %s': %s"

               fn fn str

         | #exc -> "")

  in

  let fln_src_abs =  make_absolute (pwd ()) fln_src in

  let fln_dst_abs =  make_absolute (pwd ()) fln_dst in

  if compare fln_src_abs fln_dst_abs <> 0 then begin

    if test_exists fln_dst_abs && doit force fln_dst then begin

        rm [fln_dst_abs];

        mv fln_src_abs fln_dst_abs

    end else if test Is_dir fln_dst_abs then begin

      mv ~force ~error

        fln_src_abs

        (make_absolute

           fln_dst_abs

           (basename fln_src_abs))

    end else if test_exists fln_src_abs then begin

      try

        Sys.rename fln_src_abs fln_dst_abs

      with Sys_error _ ->

        cp ~force

          ~error:(fun str e ->

                    handle_error ~fatal:true

                      (`MvCp (fln_src_abs, fln_dst_abs, str, e)))

          ~recurse:true [fln_src_abs] fln_dst_abs;

        rm ~force

          ~error:(fun str e ->

                    handle_error ~fatal:true

                      (`MvRm (fln_src_abs, str, e)))

          ~recurse:true [fln_src_abs]

    end else

      handle_error ~fatal:true `NoSourceFile

  end