NixOS Shell for cabal-desktop development

shell.nix

with import <nixpkgs> {};
with pkgs;

let cabalEnv = buildEnv {
  name = "cabal-desktop-env";
  paths = [
    # npm sodium stuff
    clang
    gnumake
    libtool
    autoconf
    automake
    m4
    # electron stuff
    alsaLib
    atk
    at-spi2-atk
    at-spi2-core
    binutils
    bzip2
    cairo
    cups
    dbus.lib
    expat
    fontconfig
    freetype
    fuse
    gdk_pixbuf
    glib
    glibc
    gtk3-x11
    libuuid
    libcap
    libgnome_keyring3
    libgpgerror
    libnotify
    libsodium
    libappindicator-gtk3
    nspr
    nss
    pango
    python
    readline
    systemd
    udev
    xdg_utils
    xorg.libX11
    xorg.libXScrnSaver
    xorg.libXcomposite
    xorg.libXcursor
    xorg.libXdamage
    xorg.libXext
    xorg.libXfixes
    xorg.libXi
    xorg.libXrandr
    xorg.libXrender
    xorg.libXtst
    xorg.libxcb
    zlib
  ];
  extraOutputsToInstall = [ "lib" "dev" "out" ];
}; in

(pkgs.buildFHSUserEnv {
  name = "cabal-desktop-chroot";

  targetPkgs = pkgs: (with pkgs; [
    nodejs-14_x
    git
    unzip
    cabalEnv
  ]);

  extraOutputsToInstall = [ "lib" "dev" "out" ];

  extraBuildCommands = ''
    (cd usr/lib64 && ln -sv libbz2.so.1.0.* libbz2.so.1.0)
  '';

  # see to compile native modules for electron and not the nodejs of the env
  # https://www.electronjs.org/docs/tutorial/using-native-node-modules#using-npm
  profile = ''
    export npm_config_cache="/tmp/cabal-desktop-npm-cache/"
    export npm_config_devdir="/tmp/cabal-desktop-gyp/"
    export ELECTRON_CACHE="/tmp/cabal-desktop-electron-cache/"

    export npm_config_target=7.1.13 # from package.json
    # The architecture of Electron, see https://electronjs.org/docs/tutorial/support#supported-platforms
    # for supported architectures.
    export npm_config_arch=x64
    export npm_config_target_arch=x64
    # Download headers for Electron.
    export npm_config_disturl=https://electronjs.org/headers
    # Tell node-pre-gyp that we are building for Electron.
    export npm_config_runtime=electron
    # Tell node-pre-gyp to build module from source code.
    export npm_config_build_from_source=true

    export CC=clang
    export CXX=clang++

    export CFLAGS="$NIX_CFLAGS_COMPILE"
    export CXXFLAGS="$NIX_CFLAGS_COMPILE"
    export LDFLAGS="$NIX_LDFLAGS_BEFORE"
  '';
}).env

does it need both, at the same tine to function... if so how does it work in 'the real world'

Create default.nix with the following contents and run
nix-build -E 'with import <nixpkgs> {}; callPackage ./default.nix {}'

Works fine for me but it would be nice if anyone can test it so I can create a pull request for this.

{ lib
, stdenv
, fetchurl
, alsa-lib
, at-spi2-atk
, at-spi2-core
, atk
, autoPatchelfHook
, cairo
, cups
, dbus
, dpkg
, expat
, fontconfig
, gdk-pixbuf
, glib
, glibc
, gsettings-desktop-schemas
, gtk3
, libX11
, libXScrnSaver
, libXcomposite
, libXcursor
, libXdamage
, libXext
, libXfixes
, libXi
, libXrandr
, libXrender
, libXtst
, libappindicator-gtk3
, libcap
, libgnome-keyring3
, libgpgerror
, libnotify
, libsodium
, libudev0-shim
, libuuid
, libxcb
, makeWrapper
, nspr
, nss
, pango
, wrapGAppsHook
}:

stdenv.mkDerivation rec {
  pname = "cabal-desktop";
  version = "7.0.0";

  src = fetchurl {
    url = "https://github.com/cabal-club/cabal-desktop/releases/download/v${version}/cabal-desktop_${version}_amd64.deb";
    hash = "sha256-PgQJWE4OmZNIykYMzOpGyXvXGnImOlq/egqZVB6ZFNE=";
  };

  buildInputs = [
    alsa-lib
    at-spi2-atk
    at-spi2-core
    atk
    cairo
    cups
    dbus
    expat
    fontconfig
    gdk-pixbuf
    glib
    gsettings-desktop-schemas
    gtk3
    libX11
    libXScrnSaver
    libXcomposite
    libXcursor
    libXdamage
    libXext
    libXfixes
    libXi
    libXrandr
    libXrender
    libXtst
    libappindicator-gtk3
    libcap
    libgnome-keyring3
    libgpgerror
    libnotify
    libsodium
    libudev0-shim
    libuuid
    libxcb
    nspr
    nss
    pango
  ];

  nativeBuildInputs = [
    autoPatchelfHook
    dpkg
    makeWrapper
    wrapGAppsHook
  ];

  runtimeLibs = lib.makeLibraryPath [ libudev0-shim glibc ];

  unpackPhase = ''
    dpkg-deb -x $src .
  '';

  installPhase = ''
    mkdir -p $out/share/cabal-desktop $out/bin $out/lib
    mv opt/Cabal/* $out/share/cabal-desktop
    mv usr/share/* $out/share/
    ln -s $out/share/cabal-desktop/cabal-desktop $out/bin/cabal-desktop
  '';

  preFixup = ''
    gappsWrapperArgs+=(--prefix LD_LIBRARY_PATH : "${runtimeLibs}" )
    # Correct desktop file `Exec`
    substituteInPlace $out/share/applications/cabal-desktop.desktop \
      --replace "/opt/Cabal/cabal-desktop" "$out/bin/cabal-desktop"
  '';

  meta = {
    homepage = "https://cabal.chat/";
    description = "Desktop client for cabal, the p2p/decentralized/offline-first chat platform";
    license = lib.licenses.agpl3Only;
    maintainers = [ lib.maintainers.dansbandit ];
    platforms = lib.platforms.linux;
    sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
  };
}

it a shame the it's a .deb that has to use patch elf, is the source not avalable?

It is! But I couldn’t get electron builder and node2nix to play nicely… 🤷‍♂️🙈

ps: it actually uses yarn and I couldn’t figure out how that factors into this.

roger that.. !! !!!

It's from the latest release https://github.com/cabal-club/cabal-desktop/releases/tag/v7.0.0.

https://github.com/NixOS/nixpkgs/blob/nixos-22.11/pkgs/applications/networking/browsers/vieb/default.nix is example using yarn.