default.nix

{
  lib,
  stdenv,
  fetchFromGitHub,
  ninja,
  makeWrapper,
  CoreFoundation,
  Foundation,
  ditto,
  nix-update-script,
}:

stdenv.mkDerivation (finalAttrs: {
  pname = "lua-language-server";
  version = "3.12.0";

  src = fetchFromGitHub {
    owner = "luals";
    repo = "lua-language-server";
    rev = finalAttrs.version;
    hash = "sha256-wyQ4oXGemoT5QVZughFKd386RjzlW4ArtQL0ofMnhpU=";
    fetchSubmodules = true;
  };

  nativeBuildInputs = [
    ninja
    makeWrapper
  ];

  buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [
    CoreFoundation
    Foundation
    ditto
  ];

  postPatch =
    ''
      # filewatch tests are failing on darwin
      # this feature is not used in lua-language-server
      sed -i /filewatch/d 3rd/bee.lua/test/test.lua

      # flaky tests on linux
      # https://github.com/LuaLS/lua-language-server/issues/2926
      sed -i /load-relative-library/d test/tclient/init.lua

      pushd 3rd/luamake
    ''
    + lib.optionalString stdenv.hostPlatform.isDarwin ''
      # This package uses the program clang for C and C++ files. The language
      # is selected via the command line argument -std, but this do not work
      # in combination with the nixpkgs clang wrapper. Therefor we have to
      # find all c++ compiler statements and replace $cc (which expands to
      # clang) with clang++.
      sed -i compile/ninja/macos.ninja \
        -e '/c++/s,$cc,clang++,' \
        -e '/test.lua/s,= .*,= true,' \
        -e '/ldl/s,$cc,clang++,'
      sed -i scripts/compiler/gcc.lua \
        -e '/cxx_/s,$cc,clang++,'
    '';

  ninjaFlags = [
    "-fcompile/ninja/${if stdenv.hostPlatform.isDarwin then "macos" else "linux"}.ninja"
  ];

  postBuild = ''
    popd
    ./3rd/luamake/luamake rebuild
  '';

  installPhase = ''
    runHook preInstall

    install -Dt "$out"/share/lua-language-server/bin bin/lua-language-server
    install -m644 -t "$out"/share/lua-language-server/bin bin/*.*
    install -m644 -t "$out"/share/lua-language-server {debugger,main}.lua
    cp -r locale meta script "$out"/share/lua-language-server

    # necessary for --version to work:
    install -m644 -t "$out"/share/lua-language-server changelog.md

    makeWrapper "$out"/share/lua-language-server/bin/lua-language-server \
      $out/bin/lua-language-server \
      --add-flags "-E $out/share/lua-language-server/main.lua \
      --logpath=\''${XDG_CACHE_HOME:-\$HOME/.cache}/lua-language-server/log \
      --metapath=\''${XDG_CACHE_HOME:-\$HOME/.cache}/lua-language-server/meta"

    runHook postInstall
  '';

  # some tests require local networking
  __darwinAllowLocalNetworking = true;

  passthru.updateScript = nix-update-script { };

  meta = with lib; {
    description = "Language server that offers Lua language support";
    homepage = "https://github.com/luals/lua-language-server";
    changelog = "https://github.com/LuaLS/lua-language-server/blob/${finalAttrs.version}/changelog.md";
    license = licenses.mit;
    maintainers = with maintainers; [
      figsoda
      gepbird
      sei40kr
    ];
    mainProgram = "lua-language-server";
    platforms = platforms.linux ++ platforms.darwin;
  };
})