Update Docker containers on Fireawlla

updatedocker.sh

#!/bin/bash

# version 3.2.0
# https://gist.github.com/mbierman/6cf22430ca0c2ddb699ac8780ef281ef

DOCKER=$(which docker)

function finished () {
        echo -e "\n please wait ($wait seconds) for the container to restart"
        while [ "$ready" != "Up" ] ; do
                sleep $wait
                ready=$(sudo docker ps | grep $1 | grep -o 'Up')
        done
}

wait=1
image=$1

if [ "$1" = "homebridge" ]; then
        container="homebridge/homebridge:ubuntu"

elif [ "$1" = "docker-notify" ]; then
        container="schlabbi/docker-notify:latest"

elif [ "$1" = "unifi" ]; then
        container="jacobalberty/unifi:latest"
    
elif [ "$1" = "ddns" ]; then
        container="oznu/cloudflare-ddns:latest"
    
else
        echo -e "Container not supported\nUse \"homebridge\", \"docker-notify\", \"unifi\" "
        exit
fi

myvar=$( sudo $DOCKER pull $container | tee /dev/tty | grep -c "Status: Image is up to date" )

        echo "Checking container..."
        myvar=$( sudo $DOCKER pull $container | tee /dev/tty | grep -c "Status: Image is up to date" )
if [ $myvar = 1 ] ; then
        echo "No update required."
        exit
else        
        read -n 1 -s -r -p "Want to update $container? \n\nPress any key to continue."
        echo "Pulling Container"
        echo "stopping $1's..."
        cd /home/pi/.firewalla/run/docker/$1
        sudo $DOCKER container stop $1 && echo "removing $1's container" && sudo $DOCKER container rm $1
        sudo docker-compose up -d
        sudo $DOCKER ps

        finished $1

        read -n 1 -s -r -p "Ready to clean up. Press any key to continue."
        sudo $DOCKER image prune -f
        sudo $DOCKER container prune -f  
        sudo $DOCKER system prune -f
fi 

I use this to update various docker containers on several platforms so I don't have to remember how and I don't make any mistakes.