config: update and refactor home-manager baseline config

configs/flake-parts/home-manager.nix

@@ -7,58 +7,6 @@
 , ...
 }:
 
-let
-  # The default config for our home-manager configurations. This is also to
-  # be used for sharing modules among home-manager users from NixOS
-  # configurations with `nixpkgs.useGlobalPkgs` set to `true` so avoid
-  # setting nixpkgs-related options here.
-  defaultHomeManagerConfig =
-    { pkgs, config, lib, ... }: {
-      # Set some extra, yeah?
-      _module.args = defaultExtraArgs;
-
-      # Hardcoding this is not really great especially if you consider using
-      # other locales but its default values are already hardcoded so what
-      # the hell. For other users, they would have to do set these manually.
-      xdg.userDirs =
-        let
-          # The home directory-related options should be already taken care
-          # of at this point. It is an ABSOLUTE MUST that it is set properly
-          # since other parts of the home-manager config relies on it being
-          # set properly.
-          #
-          # Here are some of the common cases for setting the home directory
-          # options.
-          #
-          # * For exporting home-manager configurations, this is done in this
-          #   flake definition.
-          # * For NixOS configs, this is done automatically by the
-          #   home-manager NixOS module.
-          # * Otherwise, you'll have to manually set them.
-          appendToHomeDir = path: "${config.home.homeDirectory}/${path}";
-        in
-        {
-          desktop = appendToHomeDir "Desktop";
-          documents = appendToHomeDir "Documents";
-          download = appendToHomeDir "Downloads";
-          music = appendToHomeDir "Music";
-          pictures = appendToHomeDir "Pictures";
-          publicShare = appendToHomeDir "Public";
-          templates = appendToHomeDir "Templates";
-          videos = appendToHomeDir "Videos";
-        };
-
-      programs.home-manager.enable = true;
-
-      manual = lib.mkDefault {
-        html.enable = true;
-        json.enable = true;
-        manpages.enable = true;
-      };
-
-      home.stateVersion = lib.mkDefault "23.11";
-    };
-in
 {
   setups.home-manager = {
     configs = {
@@ -96,7 +44,22 @@ in
         inputs.sops-nix.homeManagerModules.sops
         inputs.nix-index-database.hmModules.nix-index
 
-        defaultHomeManagerConfig
+        # The default shared config for our home-manager configurations. This
+        # is also to be used for sharing modules among home-manager users from
+        # NixOS configurations with `nixpkgs.useGlobalPkgs` set to `true` so
+        # avoid setting nixpkgs-related options here.
+        ({ pkgs, config, lib, ... }: {
+          # Set some extra, yeah?
+          _module.args = defaultExtraArgs;
+
+          manual = lib.mkDefault {
+            html.enable = true;
+            json.enable = true;
+            manpages.enable = true;
+          };
+
+          home.stateVersion = lib.mkDefault "23.11";
+        })
       ];
 
     standaloneConfigModules = [
@@ -109,7 +72,7 @@ in
         xdg.userDirs.createDirectories = lib.mkForce false;
 
         programs.home-manager.enable = lib.mkForce true;
-        targets.genericLinux.enable = true;
+        targets.genericLinux.enable = lib.mkDefault true;
       })
     ];
   };