statistics/flake.nix at main · eyp-developers/statistics · GitHub

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# Copyright 2026 Athena Wolfskämpf, Licensed under the EUPL
{
  description = "GA Statistics package and devshell";

  inputs = {
    nixpkgs.url = "https://channels.nixos.org/nixos-unstable/nixexprs.tar.zst";

    pyproject-nix = {
      url = "github:pyproject-nix/pyproject.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    uv2nix = {
      url = "github:pyproject-nix/uv2nix";
      inputs.pyproject-nix.follows = "pyproject-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    pyproject-build-systems = {
      url = "github:pyproject-nix/build-system-pkgs";
      inputs.pyproject-nix.follows = "pyproject-nix";
      inputs.uv2nix.follows = "uv2nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    nixpkgs,
    pyproject-nix,
    uv2nix,
    pyproject-build-systems,
    ...
  }: let
    inherit (nixpkgs) lib;
    forAllSystems = lib.genAttrs lib.systems.flakeExposed;

    workspace = uv2nix.lib.workspace.loadWorkspace {workspaceRoot = ./.;};

    overlay = workspace.mkPyprojectOverlay {
      sourcePreference = "wheel";
    };

    editableOverlay = workspace.mkEditablePyprojectOverlay {
      root = "$REPO_ROOT";
    };

    pythonSets = forAllSystems (
      system: let
        pkgs = nixpkgs.legacyPackages.${system};
        python = pkgs.python3;
      in
        (pkgs.callPackage pyproject-nix.build.packages {
          inherit python;
        }).overrideScope
        (
          lib.composeManyExtensions [
            pyproject-build-systems.overlays.wheel
            overlay
          ]
        )
    );
  in {
    devShells = forAllSystems (
      system: let
        pkgs = nixpkgs.legacyPackages.${system};
        pythonSet = pythonSets.${system}.overrideScope editableOverlay;
        virtualenv = pythonSet.mkVirtualEnv "gastatistics-dev-env" workspace.deps.all;
      in {
        default = pkgs.mkShell {
          packages = [
            pkgs.nodejs_latest
            pkgs.ruff
            pkgs.ty
            pkgs.uv
            virtualenv
          ];
          env = {
            UV_NO_SYNC = "1";
            UV_PYTHON = pythonSet.python.interpreter;
            UV_PYTHON_DOWNLOADS = "never";
          };
          shellHook = ''
            unset PYTHONPATH
            export REPO_ROOT=$(git rev-parse --show-toplevel)
          '';
        };
      }
    );

    packages = forAllSystems (system: let
      pythonSet = pythonSets.${system};
      pkgs = nixpkgs.legacyPackages.${system};
      inherit (pkgs.callPackages pyproject-nix.build.util {}) mkApplication;
    in {
      default = pythonSets.${system}.mkVirtualEnv "gastatistics-env" workspace.deps.default;
    });
  };
}