flake.nix

{
  description = "Qtile's flake, full-featured, hackable tiling window manager written and configured in Python";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
  };

  outputs = { self, nixpkgs }: let
    supportedSystems = [ "x86_64-linux" "aarch64-linux" ];

    forAllSystems = function:
      nixpkgs.lib.genAttrs supportedSystems
      (system: let
        nixpkgs-settings = {
          inherit system;

          overlays = [
            (import ./nix/overlays.nix self)
          ];
        };
      in function (import nixpkgs nixpkgs-settings));

  in {
    checks = forAllSystems (pkgs: pkgs.python3Packages.qtile.passthru.tests);

    overlays.default = import ./nix/overlays.nix self;

    packages = forAllSystems (pkgs: let
      qtile' = pkgs.python3Packages.qtile;
    in {
      default = self.packages.${pkgs.system}.qtile;

      qtile = qtile'.overrideAttrs (prev: {
        name = "${qtile'.pname}-${qtile'.version}";
        passthru.unwrapped = qtile';
      });
    });

    devShells = forAllSystems (pkgs: let
      common-python-deps = ps: with ps;
        [ python-dateutil ]
        ++ [
          # docs building
          numpydoc
          sphinx
          sphinx_rtd_theme
          # tests
          coverage
          pytest
        ];

      tests = {
        wayland = pkgs.writeScriptBin "qtile-run-tests-wayland" ''
          ./scripts/ffibuild -v
          pytest -x --backend=wayland
        '';

        x11 = pkgs.writeScriptBin "qtile-run-tests-x11" ''
          ./scripts/ffibuild -v
          pytest -x --backend=x11
        '';
      };

      common-system-deps = with pkgs; [
        # Gdk namespaces
        wrapGAppsHook
        gobject-introspection

        # docs graphs
        graphviz

        # x11 deps
        xorg.xorgserver
        xorg.libX11

        wlroots_0_17
        # test/backend/wayland/test_window.py
        gtk-layer-shell
      ] ++ (builtins.attrValues tests);
    in {
      default = pkgs.mkShell {
        env = {
          QTILE_PIXMAN_PATH = "${pkgs.pixman}/include/pixman-1";
          QTILE_LIBDRM_PATH = "${pkgs.libdrm.dev}/include/libdrm";

          LD_LIBRARY_PATH = with pkgs; lib.makeLibraryPath [
            glib
            pango
            xcb-util-cursor
            pixman
            libdrm.dev
          ];
        };

        shellHook = ''
          export PYTHONPATH=$(readlink -f .):$PYTHONPATH
        '';

        inputsFrom = [ self.packages.${pkgs.system}.qtile ];

        packages = with pkgs; [
          (python3.withPackages common-python-deps)
          pre-commit
        ] ++ common-system-deps;
      };
    });
  };
}