s3-remove-old-files.sh

#!/bin/bash

# Usage: ./s3-remove-old-files "bucket-name" "nested-path" 1000

if [ ! "$1" ]; then
    echo "1st arg (bucket name) NOT specified !!"
    exit 1
fi
if [ ! "$2" ]; then
    echo "2nd arg (bucket sublocations) NOT specified !!"
    exit 2
fi
if [ ! "$3" ]; then
    echo "3rd arg (num of days) NOT specified !!"
    exit 3
fi

olderThanTs=`date -d "-$3 days" +%s`
 
aws s3 ls "$1/$2" --recursive | grep -i zip | while read -r line;
    do
        createdAtExtracted=`echo $line | awk {'print $1" "$2'}`
        createdAtTs=`date -d "$createdAtExtracted" +%s`
        fileName=`echo $line | awk {'print $4'}`

        if [[ $createdAtTs < $olderThanTs ]];
        then
            echo "Removing file from '$createdAtExtracted' with name: $1/$fileName"
            aws s3 rm "$1/$fileName"
        fi
    done;