virtuous/flake.nix at main · mattyspangler/virtuous · GitHub

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{
  description = "BDD testing framework with Behave and Selenium";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.05";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        run-tests = pkgs.writeScriptBin "run-tests" ''
          #!${pkgs.bash}/bin/bash
          set -e
          cd app
          export CHROME_BIN=${pkgs.chromium}/bin/chromium
          export PATH="${pkgs.chromium}/bin:${pkgs.chromedriver}/bin:$PATH"
          export LD_LIBRARY_PATH="${pkgs.stdenv.cc.cc.lib}/lib"

          [ -d "../venv" ] || ${pkgs.python3}/bin/python3 -m venv ../venv
          source ../venv/bin/activate
          [ ! -f "../requirements.txt" ] || pip install -q -r ../requirements.txt

          bash runner.sh
        '';
      in
      {
        devShells.default = pkgs.mkShell {
          packages = with pkgs; [
            python3
            chromium
            chromedriver
            xvfb-run
            gcc
            stdenv.cc.cc.lib
          ];
          shellHook = ''
            export CHROME_BIN=${pkgs.chromium}/bin/chromium
            export PATH="${pkgs.chromium}/bin:${pkgs.chromedriver}/bin:$PATH"
            export LD_LIBRARY_PATH="${pkgs.stdenv.cc.cc.lib}/lib"

            [ -d "venv" ] || python3 -m venv venv
            source venv/bin/activate
            [ ! -f "requirements.txt" ] || pip install -q -r requirements.txt
          '';
        };

        apps.test = {
          type = "app";
          program = "${run-tests}/bin/run-tests";
        };
      }
    );
}