post_upgrade () {
  if $1 -l >/dev/null 2>&1; then
    $1 --populate devkitpro
  fi
}

post_install() {
  if [ -x /usr/bin/pacman-key ]; then
    post_upgrade /usr/bin/pacman-key
  else
    if [ -x /usr/local/bin/dkp-pacman-key ]; then
      post_upgrade /usr/local/bin/dkp-pacman-key
    fi
  fi
}