dnsimple_update.bash

#!/bin/bash

declare API
API="https://api.dnsimple.com/v2"

declare _zone
_zone="$1"
declare _record
_record="$2"
declare _ip
_ip="$3"

if [[ -z "$DNSIMPLE_ACCOUNT_TOKEN" ]] ; then
  echo "You must create a 'User access token' on your dnsimple.com User Settings page."
  echo "The new ACCOUNT token must be defined as \$DNSIMPLE_ACCOUNT_TOKEN in your environment."
  exit 1
fi

if ! command -v jq >&/dev/null ; then
  echo "You need to have 'jq' installed and in your $PATH."
  echo "https://stedolan.github.io/jq/"
  exit 1
fi

if [[ -z "$_zone" ]] ; then
  echo "Specify which zone (domain name) you want to use."
  exit 1
fi

if [[ -z "$_record" ]] ; then
  echo "Specify which hostname you want to create/update."
  exit 1
fi

if [[ -z "$_ip" ]] ; then
  _ip=$(dig +short myip.opendns.com @resolver1.opendns.com || curl -f4L http://ifconfig.me/ || curl -f4L http://icanhazip.com/)
fi

if [[ -z "$_ip" ]] ; then
  echo "No IP to use has been defined, setting it automatically doesn't work right now."
  exit 1
fi

declare _config=$(mktemp -t dnsimple) || exit 1
declare _json_data=$(mktemp -t dnsimple_json) || exit 1

dnsimple_api() {
  local _resource="$1"
  local _method="$2"

  local -a _args=(
                  [1]="silent"
                  [2]="header = \"Authorization: Bearer ${DNSIMPLE_ACCOUNT_TOKEN}\""
                  [3]="header = \"Accept: application/json\""
                  )

  [[ -n "$_method" ]]    && _args+=([10]="header = \"Content-Type: application/json\"" [11]="request = \"${_method}\"")
  [[ -s "$_json_data" ]] && _args+=([20]="data = \"@${_json_data}\"")

  _args+=([30]="url = \"${API}/${_resource}\"")

  $(IFS=$'\n' ; echo "${_args[*]}" > "$_config")

  curl --config "$_config"
}

# DNSIMPLE_ACCOUNT_ID=$(dnsimple_api "whoami" | jq '.data.account.id')
DNSIMPLE_ACCOUNT_ID="_"

zones() {
  dnsimple_api "${DNSIMPLE_ACCOUNT_ID}/domains" | jq '.'
}

zone_info() {
  dnsimple_api "${DNSIMPLE_ACCOUNT_ID}/zones/${_zone}" | jq '.'
}

zone_records() {
  dnsimple_api "${DNSIMPLE_ACCOUNT_ID}/zones/${_zone}/records" | jq '.'
}

get_zone_record() {
  dnsimple_api "${DNSIMPLE_ACCOUNT_ID}/zones/${_zone}/records" | jq -cMj ".data[] | select(.name == \"${_record}\")"
}

zone_record_id() {
  echo "$_zone_record" | jq -cMj ".id"
}

declare _zone_record
_zone_record=$(get_zone_record)

declare _id
_id=$(zone_record_id)

send_zone_record() {
  local _method="$1"

  echo "{\"name\":\"${_record}\",\"type\":\"A\",\"content\":\"${_ip}\"}" > "$_json_data"

  dnsimple_api "${DNSIMPLE_ACCOUNT_ID}/zones/${_zone}/records/${_id}" "${_method}" | jq '.'

  rm "$_json_data"
}

if [[ -z "$_id" ]] ; then
  send_zone_record POST
else
  send_zone_record PATCH
fi

rm "$_config"