Remove AMI and its snapshots, automatically

Given that you have setup the access key and secret keys (or roles as I prefer), I have created a BASH script to:

1. Deregister a list of AMIs
2. Delete the corresponding snapshots of the deregistered AMIs.
3. Make note of region and profile being used in the script.
   You can copy the below script (make changes accordingly):

#!/bin/bash
 
#input file should contain spaces separated ami IDs. Example: ami-abcd1234 ami-1234abcd ami-1a2b3c4d
usage () {
echo '
Usage: '"$SCRIPT_NAME"' <List of AMI IDs>
E.g.
'"$SCRIPT_NAME"' ami-abcd1234 ami-1234abcd ami-1a2b3c4d .. .. ..
'
}

if [ "$#" == 0 ]
then
	usage
else
	alias aws=''`which aws`' --profile <profile> --region <region>'
	shopt -s expand_aliases
	echo $@
	aws ec2 describe-images --image-ids $@ --query 'Images[*].BlockDeviceMappings[*].Ebs.SnapshotId' | sed 's,\t,\n,g' > del_snapshots.csv
	for i in $@; do
		echo $i
		aws ec2 deregister-image --image-id $i
	done
	cat del_snapshots.csv
	while read SNAP_ID; do
		aws ec2 delete-snapshot --snapshot-id "$SNAP_ID"
	done < del_snapshots.csv
	unalias aws
fi