change shell config to module, and ghostty also.

home/modules/shell/default.nix

@@ -0,0 +1,91 @@
+{ config, lib, ... }:
+let
+  inherit (lib) mkOption mkIf mkMerge;
+  inherit (lib.types) bool;
+  fish-cfg = config.youthlic.programs.fish;
+  bash-cfg = config.youthlic.programs.bash;
+  cfg-helper =
+    conf:
+    mkMerge [
+      conf
+      (mkIf fish-cfg.enable {
+        enableFishIntegration = true;
+      })
+      (mkIf bash-cfg.enable {
+        enableBashIntegration = true;
+      })
+    ];
+in
+{
+  options = {
+    youthlic.programs = {
+      fish = {
+        enable = mkOption {
+          type = bool;
+          default = true;
+          description = ''
+            whether to use fish shell
+          '';
+          example = false;
+        };
+      };
+      bash = {
+        enable = mkOption {
+          type = bool;
+          default = true;
+          description = ''
+            whether to use bash shell
+          '';
+          example = false;
+        };
+      };
+    };
+  };
+  config = mkMerge [
+    {
+      programs = {
+        starship = cfg-helper {
+          enable = true;
+        };
+        zoxide = cfg-helper {
+          enable = true;
+        };
+        yazi = cfg-helper {
+          enable = true;
+        };
+        fzf = cfg-helper {
+          enable = true;
+        };
+        eza = cfg-helper {
+          enable = true;
+        };
+      };
+    }
+    (mkIf fish-cfg.enable {
+      programs = {
+        fish = {
+          enable = true;
+          functions = {
+            __fish_command_not_found_handler = {
+              body = "__fish_default_command_not_found_handler $argv[1]";
+              onEvent = "fish_command_not_found";
+            };
+            fish_greeting = {
+              body = ''
+                fastfetch
+              '';
+            };
+          };
+        };
+        fastfetch.enable = true;
+      };
+    })
+    (mkIf bash-cfg.enable {
+      programs = {
+        bash = {
+          enable = true;
+        };
+      };
+    })
+  ];
+}