#!/bin/bash

FISH=$(which fish)

if grep --quiet $FISH /etc/shells; then
  echo "fish already in shells list"
else
  echo "adding fish to shells list"
  echo $FISH | sudo tee -a /etc/shells
fi

if [ $FISH == $SHELL ]; then
  echo "fish already default shell"
else
  chsh -s $FISH
fi