flake.nix

{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    flake-compat.url = "github:edolstra/flake-compat";
  };
  outputs =
    { nixpkgs, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
        lib = pkgs.lib;
      in
      {
        packages = rec {
          glasgow = pkgs.glasgow.overrideAttrs {
            version = "0+unstable-memory-24x-emu";
            src = ./.;
            doInstallCheck = false;
          };
          default = glasgow;
        };

        devShell = pkgs.mkShell {
          packages = with pkgs; [
            # Must come before yosys in this array, so it has precedence
            # over the propagatedBuildInput python3 from yosys.
            (python3.withPackages (
              pypkgs: with pypkgs; [
                typing-extensions
                amaranth
                packaging
                platformdirs
                fx2
                libusb1
                pyvcd
                aiohttp

                unittestCheckHook
              ]
            ))

            yosys
            icestorm
            nextpnr

            sdcc

          ];

          YOSYS = "${lib.getBin pkgs.yosys}/bin/yosys";
          ICEPACK = "${lib.getBin pkgs.icestorm}/bin/icepack";
          NEXTPNR_ICE40 = "${lib.getBin pkgs.nextpnr}/bin/nextpnr-ice40";
        };

        formatter = pkgs.nixfmt-rfc-style;
      }
    );
}