Remove objects from an AWS s3 bucket if last modified date is egual or before a given date.

remove-s3-objects-by-date.sh

#!/bin/bash

# usage: ./remove-s3-objects-by-date.sh bucket_name min_date
# min_date parameter must be in YYYY-MM-DD format 

if [ "$1" = "" ]; then
    echo "Missing bucket name. Usage:./remove-s3-objects-by-date.sh bucket_name min_date"
    exit 1
fi
if [ "$2" = "" ]; then
    echo "Missing min date. Usage:./remove-s3-objects-by-date.sh bucket_name min_date"
    exit 2
fi

bucket_name=$1
min_date=$2

read -p "Are you sure you want to delete objects from $bucket_name having last modified date <= $min_date (y/n)? " -n 1 -r
if [[ $REPLY =~ ^[Yy]$ ]]
then
   objects=($( aws s3 ls s3://$bucket_name --recursive | awk -v md="$min_date" '$1<=md {print $4}'))
   for object_name in "${objects[@]}"
    do
     :
        #echo $object_name
        aws s3 rm s3://$bucket_name/$object_name
    done
fi