post_install()  {
  echo ":: Setting up ayu_path..."
  fish -Pc 'set -U ayu_path /etc/fish/'
  echo ":: ayu_path has been set!"
  echo ":: You must choose one of three options for your scheme: light, dark, or mirage"
  echo ":: You can set the colorscheme with 'set -U ayu_variant {scheme}', then load it with 'load_ayu_theme'"
}

post_upgrade()  {
  echo ":: Checking for existing ayu_path..."
  fish -Pc 'set -Uq ayu_path'
  if [[ $? == 0 ]]; then
    echo ":: ayu_path already set!"
  else
    echo ":: ayu_path not set!"
    post_install
  fi
}

pre_remove()  {
  echo ":: Removing ayu_path"
  fish -Pc 'set -Uq ayu_path || set -Ue ayu_path'
  echo ":: Removed ayu_path!"
}