fava-envelope/flake.nix at master · polarmutex/fava-envelope · GitHub

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{
  description = "nix derivation for fava-envelope";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

    flake-parts.url = "github:hercules-ci/flake-parts";
    flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";

    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";
    };

    git-hooks-nix = {
      url = "github:cachix/git-hooks.nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = {
    # self,
    flake-parts,
    nixpkgs,
    uv2nix,
    pyproject-nix,
    pyproject-build-systems,
    git-hooks-nix,
    ...
  } @ inputs:
    flake-parts.lib.mkFlake
    {inherit inputs;}
    {
      systems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];

      imports = [
        git-hooks-nix.flakeModule
      ];

      perSystem = {
        config,
        system,
        ...
      }: let
        inherit (nixpkgs) lib;
        pkgs = import nixpkgs {
          inherit system;
          overlays = [];
        };

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

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

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

        # Python sets grouped per system
        pythonSets = let
          # Base Python package set from pyproject.nix
          baseSet = pkgs.callPackage pyproject-nix.build.packages {
            python = pkgs.python312;
          };

          # An overlay of build fixups & test additions
          pyprojectOverrides = _final: prev: {
          };

          buildSystemOverrides = final: prev: let
            inherit (final) resolveBuildSystem;
            inherit (builtins) mapAttrs;
            # Build system dependencies specified in the shape expected by resolveBuildSystem
            # The empty lists below are lists of optional dependencies.
            #
            # A package `foo` with specification written as:
            # `setuptools-scm[toml]` in pyproject.toml would be written as
            # `foo.setuptools-scm = [ "toml" ]` in Nix
            buildSysOverrides = {
              # curlify.setuptools = [];
              # fava-dashboards = {
              #   hatchling = [];
              #   hatch-vcs = [];
              # };
              # fava-envelope.pdm = [];
              # ofxparse.setuptools = [];
              # ofxtools.setuptools = [];
            };
          in
            mapAttrs (
              name: spec:
                prev.${name}.overrideAttrs (old: {
                  nativeBuildInputs = old.nativeBuildInputs ++ resolveBuildSystem spec;
                })
            )
            buildSysOverrides;
        in
          baseSet.overrideScope (
            lib.composeManyExtensions [
              pyproject-build-systems.overlays.default
              overlay
              pyprojectOverrides
              buildSystemOverrides
            ]
          );
      in {
        pre-commit.settings.hooks = {
          black.enable = true;
          ruff.enable = true;
        };

        devShells.default = let
          pkgs = nixpkgs.legacyPackages.${system};
          editablePythonSet = pythonSets.overrideScope editableOverlay;
          venv = editablePythonSet.mkVirtualEnv "fava-envelope-dev-env" {
            fava-envelope = ["dev"];
          };
        in
          pkgs.mkShell {
            env = {
              UV_NO_SYNC = "1";
              UV_PYTHON = "${venv}/bin/python";
              UV_PYTHON_DOWNLOADS = "never";
            };
            packages = with pkgs; [
              venv
              uv
            ];
            shellHook = ''
              unset PYTHONPATH
              export REPO_ROOT=$(git rev-parse --show-toplevel)
              ${config.pre-commit.installationScript}
              # set a venv folder for basedpyright
              venv="$(cd $(dirname $(which python)); cd ..; pwd)"
              ln -Tsf "$venv" .venv
            '';
          };
        packages = {
        };
      };
    };
}