aoc/2022/d4/flake.nix

{
  description = "D4 AOC with Lua!";
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };
  outputs = { nixpkgs, flake-utils, ... } @ inputs:
    flake-utils.lib.eachSystem flake-utils.lib.defaultSystems (sys:
      let
        overlays = [ ];
        pkgs = import nixpkgs { system = sys; overlays = overlays; };
        shellHookAfter = ''
          echo "The input files should be placed under ./data/{submission,example}.txt
          echo "This problem shares one input between two parts"
        '';
        py_pkgs = [ pkgs.python310 ];
        lua_pkgs = [ (pkgs.lua.withPackages (luapkgs: [ luapkgs.busted luapkgs.luafilesystem ])) ];
      in
      {
        # Jack of all trades
        devShell = pkgs.mkShell {
          nativeBuildInputs = py_pkgs ++ lua_pkgs;
          shellHook = ''
            echo "> Default runtime. This contains both lua and python3 env"
            echo "Run ./run-py.sh for Python's output and ./run-lua.sh for Lua's output"
          '' + shellHookAfter;
        };
        # devShells.${sys} = {
        #   lua = pkgs.mkShell {
        #     nativeBuildInputs = lua_pkgs;
        #     shellHook = ''
        #       echo "> Lua runtime"
        #       echo "Run ./run-lua.sh to see solution's output"
        #     '' + shellHookAfter;
        #   };
        #   python = pkgs.mkShell {
        #     nativeBuildInputs = py_pkgs;
        #     shellHook = ''
        #       echo "> Python3 runtime"
        #       echo "Run ./run-py.sh to see solution's output"
        #     '' + shellHookAfter;
        #
        #   };
        # };
      }
    );
}