post_upgrade() {
  # At version 0.8.749-2 we moved configs to /var/lib/jackett, so
  # migrate old config directory.
  if [[ $(vercmp "0.8.749-2" "$2") -eq 1 ]]; then
    # Check for existing old config directory and non-existance of new config file.
    if [[ -d /usr/share/Jackett/.config/Jackett && ! -f /var/lib/jackett/ServerConfig.json ]]; then
      cp -a /usr/share/Jackett/.config/Jackett/* /var/lib/jackett/
    fi

    # Check for existing old mono config directory and non-existance of new mono config directory.
    if [[ -d /usr/share/Jackett/.config/.mono && ! -d /var/lib/jackett/.config/.mono ]]; then
      cp -a /usr/share/Jackett/.config/.mono /var/lib/jackett/
    fi

    echo "Configs copied from /usr/share/Jackett/.config/Jackett -> /var/lib/jackett/."
    echo "After confirming, rm -rf /opt/Jackett /usr/share/Jackett."
  fi

  if [[ "$( getent passwd jackett | cut -d: -f6 )" != "/var/lib/jackett" ]]; then
    usermod -d /var/lib/jackett jackett
    if [[ $? -ne 0 ]]; then
      echo "Could not change jackett users home directory."
      echo "Run: sudo systemctl stop jackett ; sudo usermod -d /var/lib/jackett jackett ; sudo systemctl start jackett"
    fi
  fi
}