flake.nix

{
  description = "Darwin configuration";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    darwin.url = "github:lnl7/nix-darwin";
    darwin.inputs.nixpkgs.follows = "nixpkgs";
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";

    nix-homebrew.url = "github:zhaofengli-wip/nix-homebrew";

    homebrew-core = {
      url = "github:homebrew/homebrew-core";
      flake = false;
    };
    homebrew-cask = {
      url = "github:homebrew/homebrew-cask";
      flake = false;
    };
  };

  outputs = { home-manager, darwin, nix-homebrew, homebrew-core, homebrew-cask, ... }:
    {
      darwinConfigurations = {
        hostname = darwin.lib.darwinSystem {
          system = "aarch64-darwin";
          modules = [
            ./darwin-configuration.nix
            home-manager.darwinModules.home-manager
            {
              home-manager.backupFileExtension = "home-manager-backup";
              home-manager.useGlobalPkgs = true;

              # https://discourse.nixos.org/t/how-to-explicity-pass-arguments-config-and-pkgs-to-home-managers-nixos-module/16607/2
              home-manager.users.alex.imports = [ ./home.nix ];

              users.users.alex.home = "/Users/alex";
            }
            nix-homebrew.darwinModules.nix-homebrew
            {
              nix-homebrew = {
                enable = true;
                user = "alex";

                taps = {
                  "homebrew/homebrew-core" = homebrew-core;
                  "homebrew/homebrew-cask" = homebrew-cask;
                };

                # THIS BROKE MY SETUP, with permission denied error:
                #
                # ```
                # building the system configuration...
                # setting up Homebrew (/opt/homebrew)...
                # user defaults...
                # setting up user launchd services...
                # Homebrew bundle...
                # ==> Tapping homebrew/bundle
                # fatal: could not create work tree dir '/opt/homebrew/Library/Taps/homebrew/homebrew-bundle': Permission denied
                # Error: Failure while executing; `git clone https://github.com/Homebrew/homebrew-bundle /opt/homebrew/Library/Taps/homebrew/homebrew-bundle --origin=origin --template= --config core.fsmonitor=false` exited with 128.
                # Error: Failure while executing; `/nix/store/62dvr49jyr9qvwp7bdv9acdb5c02i2bz-brew tap homebrew/bundle` exited with 1.
                # ```

                # mutableTaps = false;
              };
            }

          ];
        };
      };
    };
}