nixpkgs/pkgs/applications/networking/instant-messengers/telegram/tdesktop/generic.nix

{ stable, version, sha256Hash, archPatchesRevision, archPatchesHash }:

{ mkDerivation, lib, fetchFromGitHub, fetchsvn
, pkgconfig, pythonPackages, cmake, wrapGAppsHook
, qtbase, qtimageformats, gtk3, libappindicator-gtk3, libnotify, xdg_utils
, dee, ffmpeg, openalSoft, minizip, libopus, alsaLib, libpulseaudio, range-v3
}:

with lib;

let
  # TODO: Not optimal (maybe we should only package the stable versions)
  previewPatches = fetchFromGitHub {
    owner = "primeos";
    repo = "nixpkgs-tdesktop-patches";
    rev = "b3c0cbce1b412443a8712c90069932bbcae87fb6";
    sha256 = "1bymrciaci6plghaz7a6qwsidjm8rg5fqdh158cdp70il4g7kmw9";
  };
in mkDerivation rec {
  name = "telegram-desktop-${version}";
  inherit version;

  # Telegram-Desktop with submodules
  src = fetchFromGitHub {
    owner = "telegramdesktop";
    repo = "tdesktop";
    rev = "v${version}";
    sha256 = sha256Hash;
    fetchSubmodules = true;
  };

  # Arch patches (svn export telegram-desktop/trunk)
  archPatches = fetchsvn {
    url = "svn://svn.archlinux.org/community/telegram-desktop/trunk";
    rev = archPatchesRevision;
    sha256 = archPatchesHash;
  };

  # TODO: libtgvoip.patch no-gtk2.patch
  patches =
    (if stable
      then [ "${archPatches}/tdesktop.patch" ]
      else [ "${previewPatches}/tdesktop.patch" ])
    # TODO: Only required to work around a compiler bug.
    # This should be fixed in GCC 7.3.1 (or later?)
    ++ [ ./fix-internal-compiler-error.patch ];

  postPatch = ''
    substituteInPlace Telegram/SourceFiles/platform/linux/linux_libs.cpp \
      --replace '"appindicator"' '"${libappindicator-gtk3}/lib/libappindicator3.so"'
    substituteInPlace Telegram/SourceFiles/platform/linux/linux_libnotify.cpp \
      --replace '"notify"' '"${libnotify}/lib/libnotify.so"'
  '';

  nativeBuildInputs = [ pkgconfig pythonPackages.gyp cmake wrapGAppsHook ];

  # We want to run wrapProgram manually (with additional parameters)
  dontWrapGApps = true;

  buildInputs = [
    qtbase qtimageformats gtk3 libappindicator-gtk3
    dee ffmpeg openalSoft minizip libopus alsaLib libpulseaudio range-v3
  ];

  enableParallelBuilding = true;

  GYP_DEFINES = concatStringsSep "," [
    "TDESKTOP_DISABLE_CRASH_REPORTS"
    "TDESKTOP_DISABLE_AUTOUPDATE"
    "TDESKTOP_DISABLE_REGISTER_CUSTOM_SCHEME"
  ];

  NIX_CFLAGS_COMPILE = [
    "-DTDESKTOP_DISABLE_CRASH_REPORTS"
    "-DTDESKTOP_DISABLE_AUTOUPDATE"
    "-DTDESKTOP_DISABLE_REGISTER_CUSTOM_SCHEME"
    "-I${minizip}/include/minizip"
    # See Telegram/gyp/qt.gypi
    "-I${getDev qtbase}/mkspecs/linux-g++"
  ] ++ concatMap (x: [
    "-I${getDev qtbase}/include/${x}"
    "-I${getDev qtbase}/include/${x}/${qtbase.version}"
    "-I${getDev qtbase}/include/${x}/${qtbase.version}/${x}"
    "-I${getDev libopus}/include/opus"
    "-I${getDev alsaLib}/include/alsa"
    "-I${getDev libpulseaudio}/include/pulse"
    ]) [ "QtCore" "QtGui" "QtDBus" ];
  CPPFLAGS = NIX_CFLAGS_COMPILE;

  preConfigure = ''
    pushd "Telegram/ThirdParty/libtgvoip"
    patch -Np1 -i "${archPatches}/libtgvoip.patch"
    popd

    sed -i Telegram/gyp/telegram_linux.gypi \
      -e 's,/usr,/does-not-exist,g' \
      -e 's,appindicator-0.1,appindicator3-0.1,g' \
      -e 's,-flto,,g'

    sed -i Telegram/gyp/qt.gypi \
      -e "s,/usr/include/qt/QtCore/,${qtbase.dev}/include/QtCore/,g" \
      -e 's,\d+",\d+" | head -n1,g'
    sed -i Telegram/gyp/qt_moc.gypi \
      -e "s,/usr/bin/moc,moc,g"
    sed -i Telegram/gyp/qt_rcc.gypi \
      -e "s,/usr/bin/rcc,rcc,g"

    # Build system assumes x86, but it works fine on non-x86 if we patch this one flag out
    sed -i Telegram/ThirdParty/libtgvoip/libtgvoip.gyp \
      -e "/-msse2/d"

    gyp ${lib.optionalString (!stable) ''
        -Dapi_id=17349 \
        -Dapi_hash=344583e45741c457fe1862106095a5eb ''}\
      -Dbuild_defines=${GYP_DEFINES} \
      -Gconfig=Release \
      --depth=Telegram/gyp \
      --generator-output=../.. \
      -Goutput_dir=out \
      --format=cmake \
      Telegram/gyp/Telegram.gyp

    cd out/Release

    NUM=$((`wc -l < CMakeLists.txt` - 2))
    sed -i "$NUM r $archPatches/CMakeLists.inj" CMakeLists.txt

    export ASM=$(type -p gcc)
  '';

  installPhase = ''
    install -Dm755 Telegram $out/bin/telegram-desktop

    mkdir -p $out/share/applications $out/share/kde4/services
    install -m444 "$src/lib/xdg/telegramdesktop.desktop" "$out/share/applications/telegram-desktop.desktop"
    sed "s,/usr/bin,$out/bin,g" $archPatches/tg.protocol > $out/share/kde4/services/tg.protocol
    for icon_size in 16 32 48 64 128 256 512; do
      install -Dm644 "../../../Telegram/Resources/art/icon''${icon_size}.png" "$out/share/icons/hicolor/''${icon_size}x''${icon_size}/apps/telegram.png"
    done
  '';

  postFixup = ''
    # This is necessary to run Telegram in a pure environment.
    # We also use gappsWrapperArgs from wrapGAppsHook.
    wrapProgram $out/bin/telegram-desktop \
      "''${gappsWrapperArgs[@]}" \
      --prefix QT_PLUGIN_PATH : "${qtbase}/${qtbase.qtPluginPrefix}" \
      --prefix PATH : ${xdg_utils}/bin \
      --set XDG_RUNTIME_DIR "XDG-RUNTIME-DIR"
    sed -i $out/bin/telegram-desktop \
      -e "s,'XDG-RUNTIME-DIR',\"\''${XDG_RUNTIME_DIR:-/run/user/\$(id --user)}\","
  '';

  meta = {
    description = "Telegram Desktop messaging app "
      + (if stable then "(stable version)" else "(pre-release)");
    license = licenses.gpl3;
    platforms = platforms.linux;
    homepage = https://desktop.telegram.org/;
    maintainers = with maintainers; [ primeos abbradar garbas ];
  };
}