# there are the following linking sets:
# - boot (not installed): without modules, only used when building clisp
# - base (default): contains readline and i18n, regexp and syscalls modules
#   by default
# - full: contains base plus modules in withModules
{ lib
, stdenv
, fetchFromGitLab
, autoconf269
, automake
, libtool
, libsigsegv
, gettext
, ncurses
, pcre
, zlib
, readline
, libffi
, libffcall
, libX11
, libXau
, libXt
, libXpm
, libXext
, xorgproto
, coreutils
# build options
, threadSupport ? (stdenv.hostPlatform.isx86 && ! stdenv.hostPlatform.isDarwin)
, x11Support ? (stdenv.hostPlatform.isx86 && ! stdenv.hostPlatform.isDarwin)
, dllSupport ? true
, withModules ? [
    "asdf"
    "pcre"
    "rawsock"
  ]
  ++ lib.optionals stdenv.isLinux [ "bindings/glibc" "zlib" ]
  ++ lib.optional x11Support "clx/new-clx"
}:

assert x11Support -> (libX11 != null && libXau != null && libXt != null
  && libXpm != null && xorgproto != null && libXext != null);

let
  ffcallAvailable = stdenv.isLinux && (libffcall != null);
  # Some modules need autoreconf called in their directory.
  shouldReconfModule = name: name != "asdf";
in

stdenv.mkDerivation {
  version = "2.50pre20230112";
  pname = "clisp";

  src = fetchFromGitLab {
    owner = "gnu-clisp";
    repo = "clisp";
    rev = "bf72805c4dace982a6d3399ff4e7f7d5e77ab99a";
    hash = "sha256-sQoN2FUg9BPaCgvCF91lFsU/zLja1NrgWsEIr2cPiqo=";
  };

  strictDeps = true;
  nativeBuildInputs = lib.optionals stdenv.isDarwin [ autoconf269 automake libtool ];
  buildInputs = [libsigsegv]
  ++ lib.optional (gettext != null) gettext
  ++ lib.optional (ncurses != null) ncurses
  ++ lib.optional (pcre != null) pcre
  ++ lib.optional (zlib != null) zlib
  ++ lib.optional (readline != null) readline
  ++ lib.optional (ffcallAvailable && (libffi != null)) libffi
  ++ lib.optional ffcallAvailable libffcall
  ++ lib.optionals x11Support [
    libX11 libXau libXt libXpm xorgproto libXext
  ];

  patches = [
    ./gnulib_aarch64.patch
  ];

  # First, replace port 9090 (rather low, can be used)
  # with 64237 (much higher, IANA private area, not
  # anything rememberable).
  postPatch = ''
    sed -e 's@9090@64237@g' -i tests/socket.tst
    sed -i 's@/bin/pwd@${coreutils}&@' src/clisp-link.in
    find . -type f | xargs sed -e 's/-lICE/-lXau &/' -i
  '';

  preConfigure = lib.optionalString stdenv.isDarwin (''
    (
      cd src
      autoreconf -f -i -I m4 -I glm4
    )
  '' + lib.concatMapStrings (x: ''
    (
      root="$PWD"
      cd modules/${x}
      autoreconf -f -i -I "$root/src" -I "$root/src/m4" -I "$root/src/glm4"
    )
  '') (builtins.filter shouldReconfModule withModules));

  configureFlags = [ "builddir" ]
  ++ lib.optional (!dllSupport) "--without-dynamic-modules"
  ++ lib.optional (readline != null) "--with-readline"
  # --with-dynamic-ffi can only exist with --with-ffcall - foreign.d does not compile otherwise
  ++ lib.optional (ffcallAvailable && (libffi != null)) "--with-dynamic-ffi"
  ++ lib.optional ffcallAvailable "--with-ffcall"
  ++ lib.optional (!ffcallAvailable) "--without-ffcall"
  ++ builtins.map (x: " --with-module=" + x) withModules
  ++ lib.optional threadSupport "--with-threads=POSIX_THREADS";

  preBuild = ''
    sed -e '/avcall.h/a\#include "config.h"' -i src/foreign.d
    sed -i -re '/ cfree /d' -i modules/bindings/glibc/linux.lisp
    cd builddir
  '';

  postInstall =
    lib.optionalString (withModules != [])
      (''./clisp-link add "$out"/lib/clisp*/base "$(dirname "$out"/lib/clisp*/base)"/full''
      + lib.concatMapStrings (x: " " + x) withModules);

  env.NIX_CFLAGS_COMPILE = "-O0 -falign-functions=${if stdenv.is64bit then "8" else "4"}";

  meta = {
    description = "ANSI Common Lisp Implementation";
    homepage = "http://clisp.org";
    maintainers = lib.teams.lisp.members;
    license = lib.licenses.gpl2Plus;
    platforms = with lib.platforms; linux ++ darwin;
  };
}