users/foo-dogsquared/programs/nushell: init dedicated module

configs/home-manager/foo-dogsquared/modules/default.nix

@@ -12,6 +12,7 @@
     ./programs/hledger.nix
     ./programs/keys.nix
     ./programs/nixvim
+    ./programs/nushell.nix
     ./programs/custom-homepage.nix
     ./programs/shell.nix
     ./programs/terminal-multiplexer.nix

configs/home-manager/foo-dogsquared/modules/programs/nushell.nix

@@ -0,0 +1,37 @@
+{ config, lib, pkgs, ... }:
+
+let
+  userCfg = config.users.foo-dogsquared;
+  cfg = userCfg.programs.nushell;
+in
+{
+  options.users.foo-dogsquared.programs.nushell.enable =
+    lib.mkEnableOption "Nushell setup";
+
+  config = lib.mkIf cfg.enable (lib.mkMerge [
+    {
+      programs.nushell = {
+        enable = true;
+        plugins = with pkgs.nushellPlugins; [
+          dbus
+          query
+          skim
+        ];
+        extraConfig = ''
+          $env.config.show_banner = false
+        '';
+      };
+    }
+
+    (lib.mkIf config.programs.fzf.enable {
+      # TODO:
+      # - Learn how to define functions in Nushell.
+      # - Learn how to attach bindings in Nushell.
+      # - Port interactive selections from fzf.
+      home.file."${config.xdg.cacheHome}/nu
+      programs.nushell.extraConfig = ''
+
+      '';
+    })
+  ]);
+}

configs/home-manager/foo-dogsquared/modules/programs/shell.nix

@@ -24,15 +24,6 @@ in
       ];
     };
 
-    programs.nushell = {
-      enable = true;
-      plugins = with pkgs.nushellPlugins; [
-        dbus
-        query
-        skim
-      ];
-    };
-
     programs.atuin = {
       enable = true;
       settings = {

configs/home-manager/foo-dogsquared/modules/setups/development.nix

@@ -21,7 +21,8 @@ in {
       ];
 
       users.foo-dogsquared.programs = {
-        shell.enable = lib.mkDefault true;
+        shell.enable = true;
+        nushell.enable = true;
         git = {
           enable = lib.mkDefault true;
           instaweb.enable = true;