# Dev shell for building/running test-stand on NixOS.
#
# Provides the system libraries uv's venv can't: libusb (Crazyradio USB
# access via pyusb) and the GL/X11/font libs DearPyGui's bundled GLFW
# binary needs at runtime. Dependency management itself stays with uv —
# run `uv sync` then `uv run test-stand` as usual once inside this shell.
#
# Note: prebuilt-wheel binaries (e.g. dearpygui) won't load on NixOS at
# all unless `programs.nix-ld.enable = true;` is set system-wide, since
# their ELF interpreter expects a dynamic loader at a standard FHS path
# that NixOS doesn't provide by default.
{ pkgs ? import <nixpkgs> {} }:

let
  libPath = pkgs.lib.makeLibraryPath (with pkgs; [
    libusb1
    libGL
    libGLU
    vulkan-loader
    xorg.libX11
    xorg.libXrandr
    xorg.libXinerama
    xorg.libXcursor
    xorg.libXi
    xorg.libXext
    xorg.libXxf86vm
    fontconfig
    freetype
    stdenv.cc.cc.lib
  ]);
in
pkgs.mkShell {
  buildInputs = [
    pkgs.python3
    pkgs.uv
    pkgs.libusb1
  ];

  shellHook = ''
    export LD_LIBRARY_PATH="${libPath}:$LD_LIBRARY_PATH"
    export NIX_LD_LIBRARY_PATH="${libPath}:$NIX_LD_LIBRARY_PATH"
  '';
}