Update outdated python packages in docker container and write out new requirements.txt

pipupdater.sh

#!/usr/bin/env bash

#set -euo pipefail
# no set -e has diff results in non-zero

echo "Checking Inside of Container For Outdated Pip"

hostdatetime=$(date +"%d-%m-%y-%H-%M-%S")

docker exec -i yourcontainer /bin/sh -c 'python3 -m pip list --outdated'

echo "Press y to Try Upgrading Inside of Container (any other to skip)"
read -r -p "Upgrade? [y/N] " response
if [[ "$response" =~ ^([yY])$ ]]; then
    echo "will upgrade"
    docker exec --env hdt=$hostdatetime -i yourcontainer /bin/sh -c 'python3 -m pip list --outdated |grep -v "^\-e" |cut -d = -f 1 | xargs -n1 python3 -m pip install --upgrade --use-deprecated=legacy-resolver ; wait ; python3 -m pip freeze > requirements-$hdt.txt'
    # copy out from container is unnecessary in dev 
    # as we are mounted so the change shows locally.
    echo "this will take a few minutes, when done you should see requirements-date/time appear"
    while [[ ! -f ./requirements-${hostdatetime}.txt ]]; do sleep 1; done
    echo "here is your diff"
    curdiff=$(diff ./requirements.txt ./requirements-${hostdatetime}.txt)
    echo $curdiff
    echo "if the new reqs looks good we can backup and overwrite requirements"
    read -r -p "BU and Overwrite? [y/N] " buresponse
    if [[ "$buresponse" =~ ^([yY])$ ]]; then
        cp ./requirements.txt ./requirements-$hostdatetime.backup
        mv ./requirements-$hostdatetime.txt ./requirements.txt
        echo "moved over and backedup"
    else
        echo "not backed-up or moved - you can choose later..."
    fi
else
    echo "skipping"   
fi