Enable transience feature for starship.

home/modules/programs/starship/default.nix

@@ -4,27 +4,44 @@
   ...
 }: let
   cfg = config.youthlic.programs.starship;
+  fish-cfg = config.youthlic.programs.fish;
+  bash-cfg = config.youthlic.programs.bash;
 in {
   options = {
     youthlic.programs.starship = {
       enable = lib.mkEnableOption "starship";
     };
   };
-  config = lib.mkIf cfg.enable {
-    programs.starship = lib.mkMerge [
-      {
-        enable = true;
-        settings = let
-          config-file = builtins.readFile ./config.toml;
-        in
-          builtins.fromTOML config-file;
+  config = lib.mkMerge [
+    (
+      lib.mkIf cfg.enable {
+        programs.starship = {
+          enable = true;
+          enableTransience = true;
+          settings = let
+            config-file = builtins.readFile ./config.toml;
+          in
+            builtins.fromTOML config-file;
+        };
       }
-      (lib.mkIf config.youthlic.programs.fish.enable {
-        enableFishIntegration = true;
-      })
-      (lib.mkIf config.youthlic.programs.bash.enable {
-        enableBashIntegration = true;
-      })
-    ];
-  };
+    )
+    (lib.mkIf (cfg.enable && fish-cfg.enable) {
+      programs.starship.enableFishIntegration = true;
+      programs.fish.functions = {
+        starship_transient_prompt_func = ''
+          starship module character
+        '';
+        starship_transient_rprompt_func = ''
+          starship module time
+        '';
+      };
+    })
+    (lib.mkIf (cfg.enable && bash-cfg.enable) {
+      programs.starship.enableBashIntegration = true;
+      programs.bash.bashrcExtra = ''
+        bleopt prompt_ps1_final='$(starship module character)'
+        bleopt prompt_rps1_final='$(starship module time)'
+      '';
+    })
+  ];
 }

nixos/configurations/Tytonidae/default.nix

@@ -37,6 +37,7 @@
     hardware.asus.enable = true;
     i18n.enable = true;
     programs = {
+      bash.enable = true;
       guix.enable = true;
       dae.enable = true;
       openssh.enable = true;

nixos/modules/programs/bash.nix

@@ -0,0 +1,18 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.youthlic.programs.bash;
+in {
+  options = {
+    youthlic.programs.bash = {
+      enable = lib.mkEnableOption "bash";
+    };
+  };
+  config = lib.mkIf cfg.enable {
+    programs.bash = {
+      blesh.enable = true;
+    };
+  };
+}

nixos/modules/programs/default.nix

@@ -29,5 +29,6 @@
     ./supergfxd.nix
     ./radicle.nix
     ./wshowkeys.nix
+    ./bash.nix
   ];
 }