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(******************************************************************************)
(* OASIS: architecture for building OCaml libraries and applications          *)
(*                                                                            *)
(* Copyright (C) 2008-2010, OCamlCore SARL                                    *)
(*                                                                            *)
(* 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              *)
(******************************************************************************)

(** Functions common to OCamlbuild build and doc plugin
  *)

open OASISGettext
open BaseEnv
open BaseStandardVar

let ocamlbuild_clean_ev =
  "ocamlbuild-clean"

let ocamlbuildflags =
  var_define
    ~short_desc:(fun () -> "OCamlbuild additional flags")
    "ocamlbuildflags"
    (fun () -> "")

(** Fix special arguments depending on environment *)
let fix_args args extra_argv =
  List.flatten
    [
      if (os_type ()) = "Win32" then
        [
          "-classic-display";
          "-no-log";
          "-no-links";
          "-install-lib-dir";
          (Filename.concat (standard_library ()) "ocamlbuild")
        ]
      else
        [];

      if not (bool_of_string (is_native ())) || (os_type ()) = "Win32" then
        [
          "-byte-plugin"
        ]
      else
        [];
      args;

      if bool_of_string (debug ()) then
        ["-tag"; "debug"]
      else
        [];

      if bool_of_string (profile ()) then
        ["-tag"; "profile"]
      else
        [];

      OASISString.nsplit (ocamlbuildflags ()) ' ';

      Array.to_list extra_argv;
    ]

(** Run 'ocamlbuild -clean' if not already done *)
let run_clean extra_argv =
  let extra_cli =
    String.concat " " (Array.to_list extra_argv)
  in
    (* Run if never called with these args *)
    if not (BaseLog.exists ocamlbuild_clean_ev extra_cli) then
      begin
        OASISExec.run ~ctxt:!BaseContext.default
          (ocamlbuild ()) (fix_args ["-clean"] extra_argv);
        BaseLog.register ocamlbuild_clean_ev extra_cli;
        at_exit
          (fun () ->
             try
               BaseLog.unregister ocamlbuild_clean_ev extra_cli
             with _ ->
               ())
      end

(** Run ocamlbuild, unregister all clean events *)
let run_ocamlbuild args extra_argv =
  (* TODO: enforce that target in args must be UNIX encoded i.e. toto/index.html
   *)
  OASISExec.run ~ctxt:!BaseContext.default
    (ocamlbuild ()) (fix_args args extra_argv);
  (* Remove any clean event, we must run it again *)
  List.iter
    (fun (e, d) -> BaseLog.unregister e d)
    (BaseLog.filter [ocamlbuild_clean_ev])

(** Determine real build directory *)
let build_dir extra_argv =
  let rec search_args dir =
    function
      | "-build-dir" :: dir :: tl ->
          search_args dir tl
      | _ :: tl ->
          search_args dir tl
      | [] ->
          dir
  in
    search_args "_build" (fix_args [] extra_argv)

(* END EXPORT *)

open OASISTypes

let fix_build_tools tool pkg =
  let fix_build_tools' sct bs =
    if not (List.mem tool bs.bs_build_tools) then
      {bs with bs_build_tools = tool :: bs.bs_build_tools}
    else
      bs
  in

  let sections =
    List.fold_left
      (fun acc sct ->
         let sct =
           match sct with
             | Executable (cs, bs, exec) ->
                 let bs = fix_build_tools' sct bs in
                   Executable (cs, bs, exec)

             | Library (cs, bs, lib) ->
                 let bs = fix_build_tools' sct bs in
                   Library (cs, bs, lib)

             | Flag _ | SrcRepo _ | Test _ | Doc _ as sct ->
                 sct
         in
           sct :: acc)
      []
      pkg.sections
  in
    {pkg with sections = List.rev sections}


module Tag =
struct
  (** [filename_concat fn1 fn2] Concat filename, using semantic of _tags
      [fn1] must be a real filename whereas fn2 can contains wildcards.
    *)
  let filename_concat fn1 fn2 =
    OASISUnixPath.concat (OASISUnixPath.reduce fn1) fn2

end