terraform.aws-baseline-infra/modules/networking/delete-default-vpcs/exec.sh

#!/bin/bash

region=$1
vpc=$(aws ec2 --region ${region} describe-vpcs --filter Name=isDefault,Values=true | jq -r .Vpcs[0].VpcId)
if [ "${vpc}" = "null" ]; then
  echo "No default vpc found"
  exit 0
fi

aws ec2 --region ${region} describe-internet-gateways --filter Name=attachment.vpc-id,Values=${vpc}
 | jq -r .InternetGateways[0].InternetGatewayId | while read igw; do
  echo "Removing internet gateway ${igw}"
  aws ec2 --region ${region} detach-internet-gateway --internet-gateway-id ${igw} --vpc-id ${vpc}
  aws ec2 --region ${region} delete-internet-gateway --internet-gateway-id ${igw}
done

aws ec2 --region ${region} describe-subnets --filters Name=vpc-id,Values=${vpc} | jq -r .Subnets[].SubnetId) | while read subnet; do
  echo "Removing subnet ${subnet}"
  aws ec2 --region ${region} delete-subnet --subnet-id ${subnet}
done

echo "Removing vpc ${vpc}"
aws ec2 --region ${region} delete-vpc --vpc-id ${vpc}