refactor: massively overhaul home manager module system

reference/hosts/phobos/configuration.nix

@@ -0,0 +1,57 @@
+{
+  inputs,
+  config,
+  pkgs,
+  ...
+}:
+{
+  # Expose the package set, including overlays, for convenience.
+  # darwinPackages = inputs.self.darwinConfigurations."Youwens-MacBook-Pro".pkgs;
+
+  # List packages installed in system profile. To search by name, run:
+  # $ nix-env -qaP | grep wget
+  environment.systemPackages = with pkgs; [ ];
+
+  # Use a custom configuration.nix location.
+  # $ darwin-rebuild switch -I darwin-config=$HOME/.config/nixpkgs/darwin/configuration.nix
+  # environment.darwinConfig = "$HOME/.config/nixpkgs/darwin/configuration.nix";
+
+  # Auto upgrade nix package and the daemon service.
+  services.nix-daemon.enable = true;
+  # nix.package = pkgs.nix;
+
+  nix.settings.experimental-features = "nix-command flakes";
+
+  nixpkgs.config.allowUnfree = true;
+
+  # Create /etc/zshrc that loads the nix-darwin environment.
+  programs.zsh.enable = true; # default shell on catalina
+  programs.fish.enable = true;
+  programs.bash.enable = true;
+
+  system.configurationRevision = config.self.rev or config.self.dirtyRev or null;
+
+  nixpkgs.hostPlatform = "aarch64-darwin";
+
+  # Used for backwards compatibility, please read the changelog before changing.
+  # $ darwin-rebuild changelog
+  system.stateVersion = 4;
+
+  users.users.youwen = {
+    home = "/Users/youwen";
+    description = "Youwen Wu";
+    shell = pkgs.fish;
+  };
+
+  security.pam.enableSudoTouchIdAuth = true;
+
+  fonts = {
+    packages = with pkgs; [
+      noto-fonts
+      noto-fonts-cjk-sans
+      noto-fonts-emoji
+      nerd-fonts.caskaydia-cove
+      (google-fonts.override { fonts = [ "Lora" ]; })
+    ];
+  };
+}

reference/hosts/phobos/default.nix

@@ -0,0 +1,24 @@
+{ inputs, ... }:
+{
+  imports = with inputs; [
+    ./configuration.nix
+    home-manager.darwinModules.home-manager
+    {
+      extraSpecialArgs = {
+        inherit inputs;
+      };
+      home-manager.useGlobalPkgs = true;
+      home-manager.useUserPackages = true;
+      home-manager.users.youwen.imports = [
+        ../../users/youwen/darwin/darwin-home.nix
+        ../../users/youwen/common/core.nix
+        ../../users/youwen/common/neofetch
+      ];
+      home-manager.backupFileExtension = "backup";
+    }
+    nix-homebrew.darwinModules.nix-homebrew
+    ../../modules/darwin/homebrew.nix
+    ../../modules/darwin/yabai.nix
+    ../../modules/darwin/skhd.nix
+  ];
+}