#!/usr/bin/env bash

TYPE=$1

echo "Update method: $TYPE"

case "$TYPE" in

apt)

apt update
apt upgrade -y

;;

apk)

apk update
apk upgrade

;;

docker)

docker ps --format "{{.Image}}" | sort -u | while read img
do
    docker pull "$img"
done

;;

*)

echo "Unknown update method"

;;

esac