flake.nix

{
  description = "VAMPyR";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    pypi-deps-db = {
      url = "github:DavHau/pypi-deps-db";
      flake = false;
    };
    mach-nix = {
      url = "mach-nix/3.4.0";
      inputs.pypi-deps-db.follows = "pypi-deps-db";
    };
  };

  outputs = {
    self,
    nixpkgs,
    flake-utils,
    pypi-deps-db,
    mach-nix,
  }:
    flake-utils.lib.eachDefaultSystem (system: let
      pkgs = nixpkgs.legacyPackages.${system};
      pythonEnv = mach-nix.lib."${system}".mkPython {
        requirements =
          builtins.readFile ./requirements.txt
          + ''
                   # additional dependencies for local work
                   #jupyterlab
            pre-commit
          '';
      };
    in {
      devShell = pkgs.mkShell {
        nativeBuildInputs = with pkgs; [
          cmake
          eigen
          gcc
          openmpi
          ninja
        ];
        buildInputs = [
          pythonEnv
        ];
        NINJA_STATUS = "[Built edge %f of %t in %e sec] ";
      };
    });
}