Queries AWS Route53 for a zone name and outputs a zone file of its records

r53export.sh

#!/bin/bash
#
# Queries AWS Route53 for a zone name and outputs a zone file of its records
#
# Usage:
#
#     r53export example.com[ profile]
#
# By default, uses $AWS_PROFILE environment variable, if set.
#
#
# Dependencies:
#
# * AWS Command Line Interface, <https://aws.amazon.com/cli/>
# * ./jq, <https://stedolan.github.io/jq/>
# * ~/.aws/config file divided into profiles; see `aws configure help`
#
#
# Copyright 2018 Ben Ramsey <ben@benramsey.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy 
# of this software and associated documentation files (the "Software"), to deal 
# in the Software without restriction, including without limitation the rights 
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
# copies of the Software, and to permit persons to whom the Software is 
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in 
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
# SOFTWARE.

zonename=$1
profile="${2:-$AWS_PROFILE}"

echo "; Using AWS profile ${profile}"

jq_getzoneid=$(cat <<EOF
    .HostedZones[]
    | select(.Name == "${zonename}.")
    | .Id
    | ltrimstr("/hostedzone/")
EOF
)

hostedzones=$(aws --profile "${profile}" route53 list-hosted-zones)
hostedzoneid=$(echo "$hostedzones" | jq -r "$jq_getzoneid")

echo -e "; Hosted zone ID: ${hostedzoneid}\n"


zone_records=$(
    aws --profile "${profile}" route53 \
    list-resource-record-sets \
    --hosted-zone-id "${hostedzoneid}" \
    --output json
)

jq_dnsvalue=$(cat <<EOF
    if (.ResourceRecords) != null then
        (.ResourceRecords[].Value)
    else (
        if (.AliasTarget) != null then
            "\(.AliasTarget.DNSName) ; HostedZoneId: \(.AliasTarget.HostedZoneId)"
        else
            ""
        end
    ) end
EOF
)

jq_parsezone=$(cat <<EOF
    .ResourceRecordSets[]
    |
        "\(.Name)\t"
        + "\(if (.TTL) == null then "" else (.TTL) end)\t"
        + "IN\t"
        + "\(if (.AliasTarget != null) then "ALIAS" else (.Type) end)\t"
        + "\($jq_dnsvalue)"
EOF
)

echo "$zone_records" | jq -r "$jq_parsezone"