Get subdomain list from AWS Route53 Zone ID argument

aws_getSubdomainList.sh

#!/bin/bash
#
# Get Subdomain Record Sets for Hosted Zone ID in Route 53
# Requires: AWS CLI; jq
# -- Cole Hocking

# Takes Hosted Zone ID as arg
HZID=$1
OUTFILE="./subdomain_list.txt"

echo "Fetching record sets..."

get_subdomains(){
    # Fetch the CNAME entries
    # Inverse grep ignores domain key entries
    aws route53 list-resource-record-sets --hosted-zone-id "${HZID}" | jq -r '.ResourceRecordSets[] | select(.Type == "CNAME") | .Name' | grep -v "domainkey"
    # Fetch the A entries
    aws route53 list-resource-record-sets --hosted-zone-id "${HZID}" | jq -r '.ResourceRecordSets[] | select(.Type == "A") | .Name'
}

# Outputs subdomain_list.txt
main(){
    if [[ -f "${OUTFILE}" ]]; then
        rm ${OUTFILE}
    fi
    get_subdomains | sort | uniq >> ${OUTFILE}
    echo "Done!"
}
main

# Remove Trailing Period if needed
# sed -e 's/\.$//g' ${OUTFILE} -i