flake.nix

{
  description = "Zenful Darwin system flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    nix-darwin.url = "github:LnL7/nix-darwin";
    nix-darwin.inputs.nixpkgs.follows = "nixpkgs";
    nix-homebrew.url = "github:zhaofengli-wip/nix-homebrew";
  };

  outputs = inputs@{ self, nix-darwin, nixpkgs, nix-homebrew }:
  let
    configuration = { pkgs, config, ... }: {
      nixpkgs.config.allowUnfree = true;

      # List packages installed in system profile. To search by name, run:
      # $ nix-env -qaP | grep wget
      environment.systemPackages =
        [ 
	  pkgs.alacritty
	  pkgs.mkalias
	  pkgs.neovim
	  pkgs.tmux
        ];

	homebrew = {
	  enable =true;
	  casks = [
	    "hammerspoon"
	    "firefox"
	    "iina"
	    "the-unarchiver"
	  ];
	  onActivation.cleanup = "zap";
	};

        fonts.packages = [
	  (pkgs.nerdfonts.override { fonts = [ "JetBrainsMono" ]; })
	];

      system.defaults = {
        dock.autohide  = true;
        dock.persistent-apps = [
          "${pkgs.alacritty}/Applications/Alacritty.app"
          "/Applications/Firefox.app"
          "${pkgs.obsidian}/Applications/Obsidian.app"
          "/System/Applications/Mail.app"
          "/System/Applications/Calendar.app"
        ];
        finder.FXPreferredViewStyle = "clmv";
        loginwindow.GuestEnabled  = false;
        NSGlobalDomain.AppleICUForce24HourTime = true;
        NSGlobalDomain.AppleInterfaceStyle = "Dark";
        NSGlobalDomain.KeyRepeat = 2;
      };

      system.activationScripts.applications.text = let
        env = pkgs.buildEnv {
          name = "system-applications";
          paths = config.environment.systemPackages;
          pathsToLink = "/Applications";
         };
       in
         pkgs.lib.mkForce ''
         # Set up applications.
         echo "setting up /Applications..." >&2
         rm -rf /Applications/Nix\ Apps
         mkdir -p /Applications/Nix\ Apps
         find ${env}/Applications -maxdepth 1 -type l -exec readlink '{}' + |
         while read src; do
           app_name=$(basename "$src")
           echo "copying $src" >&2
          ${pkgs.mkalias}/bin/mkalias "$src" "/Applications/Nix Apps/$app_name"
         done
             '';     

      # Auto upgrade nix package and the daemon service.
      services.nix-daemon.enable = true;
      # nix.package = pkgs.nix;

      # Necessary for using flakes on this system.
      nix.settings.experimental-features = "nix-command flakes";

      # Create /etc/zshrc that loads the nix-darwin environment.
      programs.zsh.enable = true;  # default shell on catalina
      # programs.fish.enable = true;

      # Set Git commit hash for darwin-version.
      system.configurationRevision = self.rev or self.dirtyRev or null;

      # Used for backwards compatibility, please read the changelog before changing.
      # $ darwin-rebuild changelog
      system.stateVersion = 5;

      # The platform the configuration will be used on.
      nixpkgs.hostPlatform = "aarch64-darwin";
    };
  in
  {
    # Build darwin flake using:
    # $ darwin-rebuild build --flake .#simple
    darwinConfigurations."mac" = nix-darwin.lib.darwinSystem {
      modules = [ 
        configuration
        nix-homebrew.darwinModules.nix-homebrew
	{
	  nix-homebrew = {
	    enable = true;
	    enableRosetta = true;
	    user = "michael";
	  };
	}
      ];
    };

    # Expose the package set, including overlays, for convenience.
    darwinPackages = self.darwinConfigurations."mac".pkgs;
  };
}