Use fish

modules/common.nix

@@ -18,6 +18,7 @@
   users.users.nettika = {
     isNormalUser = true;
     extraGroups = [ "wheel" "networkmanager" ];
+    shell = pkgs.fish;
   };
 
   security.sudo.wheelNeedsPassword = false;
@@ -47,6 +48,10 @@
     '';
   };
 
+  programs.fish = {
+    enable = true;
+  };
+
   environment.systemPackages = with pkgs; [
     git-crypt
     htop

modules/prompt.nix

@@ -7,4 +7,23 @@
   config.programs.bash.promptInit = ''
     PS1="\[\e]0;\u@\h: \w\a\]\n${config.promptEmoji} \[\033[1;$((UID ? 32 : 31))m\]\w \\$\[\033[0m\] "
   '';
+
+  config.programs.fish = {
+    promptInit = ''
+      function fish_prompt
+        echo -n '${config.promptEmoji} '
+        set_color brgreen
+        echo -n $PWD
+        set_color normal
+        echo -n ' > '
+      end
+      function fish_right_prompt
+        set_color bryellow
+        echo -n (git branch --show-current 2>/dev/null)
+      end
+    '';
+    shellInit = ''
+      set -g fish_greeting
+    '';
+  };
 }