nixpkgs/pkgs/development/ocaml-modules/lablgtk/default.nix

{ stdenv, fetchurl, ocaml, findlib, pkgconfig, gtk2, libgnomecanvas, libglade, gtksourceview }:

let param =
  let check = stdenv.lib.versionAtLeast ocaml.version; in
  if check "4.06" then {
    version = "2.18.6";
    url = https://forge.ocamlcore.org/frs/download.php/1726/lablgtk-2.18.6.tar.gz;
    sha256 = "1y38fdvswy6hmppm65qvgdk4pb3ghhnvz7n4ialf46340r1s5p2d";
  } else if check "3.12" then {
    version = "2.18.5";
    url = https://forge.ocamlcore.org/frs/download.php/1627/lablgtk-2.18.5.tar.gz;
    sha256 = "0cyj6sfdvzx8hw7553lhgwc0krlgvlza0ph3dk9gsxy047dm3wib";
  } else throw "lablgtk is not available for OCaml ${ocaml.version}";
in

stdenv.mkDerivation rec {
  name = "lablgtk-${version}";
  inherit (param) version;

  src = fetchurl {
    inherit (param) url sha256;
  };

  nativeBuildInputs = [ pkgconfig ];
  buildInputs = [ ocaml findlib gtk2 libgnomecanvas libglade gtksourceview ];

  configureFlags = "--with-libdir=$(out)/lib/ocaml/${ocaml.version}/site-lib";
  buildFlags = "world";

  preInstall = ''
    mkdir -p $out/lib/ocaml/${ocaml.version}/site-lib
    export OCAMLPATH=$out/lib/ocaml/${ocaml.version}/site-lib/:$OCAMLPATH
  '';

  dontStrip = true;

  meta = with stdenv.lib; {
    platforms = ocaml.meta.platforms or [];
    maintainers = with maintainers; [
      z77z roconnor vbgl
    ];
    homepage = http://lablgtk.forge.ocamlcore.org/;
    description = "An OCaml interface to gtk+";
    license = licenses.lgpl21Plus;
  };
}