System/packages/discord/default.nix

{ pname, version, src, binaryName, desktopName, autoPatchelfHook
, makeDesktopItem, lib, stdenv, wrapGAppsHook, alsaLib, at-spi2-atk
, at-spi2-core, atk, cairo, cups, dbus, expat, fontconfig, freetype, gdk-pixbuf
, glib, gtk3, libcxx, libdrm, libnotify, libpulseaudio, libuuid, libX11
, libXScrnSaver, libXcomposite, libXcursor, libXdamage, libXext, libXfixes
, libXi, libXrandr, libXrender, libXtst, libxcb, libxshmfence, mesa, nspr, nss
, pango, systemd, libappindicator-gtk3, libdbusmenu, writeScript
, common-updater-scripts, electron, nodePackages, gcc, glibc }:

let inherit binaryName;
in stdenv.mkDerivation rec {
  inherit pname version src;

  nativeBuildInputs = [
    alsaLib
    autoPatchelfHook
    stdenv.cc.cc
    cups
    libdrm
    libuuid
    libXdamage
    libX11
    libXScrnSaver
    libXtst
    libxcb
    libxshmfence
    mesa
    nss
    wrapGAppsHook
    nodePackages.asar
    autoPatchelfHook
  ];

  buildInputs = [ electron gcc.cc.libgcc glibc ];

  dontWrapGApps = true;

  libPath = lib.makeLibraryPath [
    libcxx
    systemd
    libpulseaudio
    libdrm
    mesa
    stdenv.cc.cc
    alsaLib
    atk
    at-spi2-atk
    at-spi2-core
    cairo
    cups
    dbus
    expat
    fontconfig
    freetype
    gdk-pixbuf
    glib
    gtk3
    libnotify
    libX11
    libXcomposite
    libuuid
    libXcursor
    libXdamage
    libXext
    libXfixes
    libXi
    libXrandr
    libXrender
    libXtst
    nspr
    nss
    libxcb
    pango
    systemd
    libXScrnSaver
    libappindicator-gtk3
    libdbusmenu
    gcc.cc.libgcc
  ];

  installPhase = let electron_exec = "${electron}/bin/electron";
  in ''
    mkdir -p $out/{bin,opt/${binaryName},share/pixmaps}
    mv * $out/opt/${binaryName}
    chmod +x $out/opt/${binaryName}/${binaryName}
    ln -s $out/opt/${binaryName}/discord.png $out/share/pixmaps/${pname}.png
    mkdir -p $out/share/applications
    ls $out/share/applications
    sed "s|OUTDIR|$out|" ${desktopItem}/share/applications/${pname}.desktop > $out/share/applications/${pname}.desktop 
    # Hacks for system electron
    asar e $out/opt/${binaryName}/resources/app.asar $out/opt/${binaryName}/resources/app
    rm $out/opt/${binaryName}/resources/app.asar
    sed -i "s|process.resourcesPath|'$out/opt/${binaryName}/resources'|" $out/opt/${binaryName}/resources/app/app_bootstrap/buildInfo.js
    sed -i "s|exeDir,|'$out/share/pixmaps',|" $out/opt/${binaryName}/resources/app/app_bootstrap/autoStart/linux.js
    asar p $out/opt/${binaryName}/resources/app $out/opt/${binaryName}/resources/app.asar --unpack-dir '**'

    # executable wrapper
    makeWrapper '${electron_exec}' "$out/bin/${binaryName}" \
      --add-flags "--enable-features=UseOzonePlatform --ozone-platform=wayland $out/opt/${binaryName}/resources/app.asar"\
      --prefix XDG_DATA_DIRS : "${gtk3}/share/gsettings-schemas/${gtk3.name}/"\
      --prefix LD_LIBRARY_PATH : ${libPath}
    ln -s $out/bin/${binaryName} $out/bin/${lib.strings.toLower binaryName}
  '';

  desktopItem = makeDesktopItem {
    name = pname;
    exec = "${binaryName}";
    icon = pname;
    inherit desktopName;
    genericName = meta.description;
    categories = [ "Network" "InstantMessaging" ];
    mimeTypes = [ "x-scheme-handler/discord" ];
  };

  passthru.updateScript = writeScript "discord-update-script" ''
    #!/usr/bin/env nix-shell
    #!nix-shell -i bash -p curl gnugrep common-updater-scripts
    set -eou pipefail;
    url=$(curl -sI "https://discordapp.com/api/download/${
      builtins.replaceStrings [ "discord-" "discord" ] [ "" "stable" ] pname
    }?platform=linux&format=tar.gz" | grep -oP 'location: \K\S+')
    version=''${url##https://dl*.discordapp.net/apps/linux/}
    version=''${version%%/*.tar.gz}
    update-source-version ${pname} "$version" --file=./pkgs/applications/networking/instant-messengers/discord/default.nix
  '';

  meta = with lib; {
    description = "All-in-one cross-platform voice and text chat for gamers";
    homepage = "https://discordapp.com/";
    downloadPage = "https://discordapp.com/download";
    license = licenses.unfree;
    maintainers = with maintainers; [ ldesgoui MP2E ];
    platforms = [ "x86_64-linux" ];
  };
}