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https://github.com/exo-explore/exo.git
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e4c6a7dbb4
Add uv2nix to build Python packages from uv.lock. This creates a fully Nix-managed Python environment with the Rust bindings injected via overlay. Changes: - Add pyproject-nix, uv2nix, and pyproject-build-systems flake inputs - Create python/parts.nix with overlays to inject Nix-built Rust wheel - Export packages.exo on macOS (wraps exo/exo-master/exo-worker with dashboard) - Add checks.lint (ruff, all platforms) and checks.pytest (macOS only) - Simplify CI typecheck job using nicknovitski/nix-develop action - Delete .github/actions/typecheck composite action (no longer needed) - Add no-build-package for MLX packages in pyproject.toml (use wheels) The Python build is currently macOS-only since MLX requires Metal. Linux support will be added once the pyproject dependencies are simplified. Test plan: - Run `nix flake check` on macOS to verify pytest and lint pass - Build exo package on macOS: `nix build .#exo` - Verify CI pipeline passes with simplified typecheck job
94 lines
2.9 KiB
Nix
94 lines
2.9 KiB
Nix
{ inputs, ... }:
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{
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perSystem =
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{ config, self', pkgs, lib, system, ... }:
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let
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# Load workspace from uv.lock
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workspace = inputs.uv2nix.lib.workspace.loadWorkspace {
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workspaceRoot = inputs.self;
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};
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# Create overlay from workspace
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# Use wheels from PyPI for most packages; we override mlx with our pure Nix Metal build
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overlay = workspace.mkPyprojectOverlay { sourcePreference = "wheel"; };
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# Override overlay to inject Nix-built components
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exoOverlay = final: prev: {
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# Replace workspace exo_pyo3_bindings with Nix-built wheel
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exo-pyo3-bindings = pkgs.stdenv.mkDerivation {
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pname = "exo-pyo3-bindings";
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version = "0.1.0";
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src = self'.packages.exo_pyo3_bindings;
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# Install from pre-built wheel
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nativeBuildInputs = [ final.pyprojectWheelHook ];
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dontStrip = true;
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};
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};
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python = pkgs.python313;
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# Overlay to provide build systems and custom packages
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buildSystemsOverlay = final: prev: {
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# Use our pure Nix-built MLX with Metal support
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mlx = self'.packages.mlx;
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# mlx-lm is a git dependency that needs setuptools
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mlx-lm = prev.mlx-lm.overrideAttrs (old: {
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nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [
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final.setuptools
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];
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});
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};
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pythonSet = (pkgs.callPackage inputs.pyproject-nix.build.packages {
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inherit python;
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}).overrideScope (
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lib.composeManyExtensions [
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inputs.pyproject-build-systems.overlays.default
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overlay
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exoOverlay
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buildSystemsOverlay
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]
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);
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exoVenv = pythonSet.mkVirtualEnv "exo-env" workspace.deps.default;
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# Virtual environment with dev dependencies for testing
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testVenv = pythonSet.mkVirtualEnv "exo-test-env" (
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workspace.deps.default // {
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exo = [ "dev" ]; # Include pytest, pytest-asyncio, pytest-env
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}
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);
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exoPackage = pkgs.runCommand "exo"
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{
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nativeBuildInputs = [ pkgs.makeWrapper ];
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}
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''
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mkdir -p $out/bin
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# Create wrapper scripts
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for script in exo exo-master exo-worker; do
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makeWrapper ${exoVenv}/bin/$script $out/bin/$script \
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--set DASHBOARD_DIR ${self'.packages.dashboard}
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done
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'';
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in
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{
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# Python package only available on macOS (requires MLX/Metal)
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packages = lib.optionalAttrs pkgs.stdenv.hostPlatform.isDarwin {
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exo = exoPackage;
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# Test environment for running pytest outside of Nix sandbox (needs GPU access)
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exo-test-env = testVenv;
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};
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checks = {
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# Ruff linting (works on all platforms)
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lint = pkgs.runCommand "ruff-lint" { } ''
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export RUFF_CACHE_DIR="$TMPDIR/ruff-cache"
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${pkgs.ruff}/bin/ruff check ${inputs.self}/
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touch $out
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'';
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};
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};
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}
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