Small bash script to get the lifecycle transitions of all buckets in an AWS account.

aws-s3-get-bucket-lifecycles.sh

#!/bin/bash

AWS_PROFILE="default"

BUCKETS=$(aws --profile $AWS_PROFILE s3api list-buckets --query 'Buckets[*].Name' --output text)

echo -e "bucket name\tstatus of the transition\tprefix the transition applies to\tdays after which the transition applies\tto storage class\tdelete after days\tdescription"
for bucket in $BUCKETS; do
    TRANSITION=$(aws --profile $AWS_PROFILE s3api get-bucket-lifecycle --bucket $bucket --query 'Rules[*][Status, Prefix, Transition.Days, Transition.StorageClass, Expiration.Days ID]' --output text 2> /dev/null)
    if [ "$?" = "255" ]; then
        echo -e "$bucket\tNone"
    else
        echo "$TRANSITION" | while read line; do
            echo -e "$bucket\t$line"
        done
    fi
done