Purge old files from S3 with "s3cmd"

s3purge.sh

#!/bin/bash

# Version: 0.2.0
#
# Usage:
#   ./s3purge "bucketname" "30 days"
#   ./s3purge "bucketname" "6 hours"

/usr/local/bin/s3cmd ls s3://$1 | while read -r line;
    do

        createDate=`echo $line|awk {'print $1" "$2'}`
        createDate=`date -u -d"$createDate" +%s`
        olderThan=`date -u -d"-$2" +%s`

        # DEBUG DATES
        #echo "$createDate - $olderThan"

        if [[ $createDate -lt $olderThan ]]
            then
                fileName=`echo $line|awk {'print $4'}`
                if [[ $fileName != "" ]]
                    then
                        # DEBUG FILENAME TO DELETE
                        # echo $fileName
                        /usr/local/bin/s3cmd del "$fileName"
                fi
        fi

    done;

Based on: http://shout.setfive.com/2011/12/05/deleting-files-older-than-specified-time-with-s3cmd-and-bash/