TIL: How to change the fish greeter

In this post I will show you how you can change your fish shell greeter from the default

Welcome to fish, the friendly interactive shell
Type `help` for instructions on how to use fish

To something custom, this will run every time you open a new shell!

Fish Greeting

To do this, go to your fish_greeter.fish file which can usually be found at ~/.config/fish/functions/fish_greeting.fish. Where mine looks like:

function fish_greeting
    fortune | lolcat -f | chara say -c kitten

fortune generates a random quote, then lolcat colours that quote as a rainbow and finally chara prints out the kitten.

Nix (Optional)

If you are using fish to configure your fish shell you can do something like (I do this in a file called fish.nix):

{ lib, pkgs, ... }:

  programs.fish = {
    enable = true;
    functions = {
      fish_greeting = {
        description = "Greeting to show when starting a fish shell";
        body = "fortune | lolcat -f | chara say -c kitten";