entrypoint.sh

#!/bin/bash

git config --global --add safe.directory /github/workspace

export IFS=$'\n'
SECONDS=$((86400*$1))
TIME=$(($(date +%s)-$SECONDS))

OUT=""
#loop for deleting old branches
for i in $(git for-each-ref refs/remotes/origin --sort=committerdate  --format='%(HEAD)%(color:yellow)%(refname:short)%(color:reset) %(color:green)%(committerdate:raw)%(color:reset)')
do
    export IFS=$' '
    elements=($i)    
    if [ $TIME -gt ${elements[1]} ]
    then
        export IFS="/"
	    inner_elements=(${elements[0]})
        if [[ ${inner_elements[1]} != "KEEP"* ]]
        then
            git push origin --delete ${inner_elements[1]}
            # echo ${inner_elements[1]}
            OUT="${OUT}, ${inner_elements[1]}"
        fi
    fi
done
export IFS=$'\n'

#loop for deleting old tags
TO_SKIP=$2
for n in $(git tag --sort=-creatordate)
do
    if [ $TO_SKIP -gt 0 ]
    then
        TO_SKIP=$(( $TO_SKIP-1 ))
    else
        git push origin --delete refs/tags/$n
        OUT="${OUT}, ${n}"
    fi
done

echo ${OUT}
echo "::set-output name=branches::$OUT"