building on nixos

.envrc

@@ -0,0 +1 @@
+use nix

.gitignore

@@ -3,3 +3,4 @@ __pycache__/
 *.pyc
 cache/
 .DS_Store
+.direnv

shell.nix

@@ -0,0 +1,43 @@
+# 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"
+  '';
+}