Update DNS A record with Gandi's API

gandi.sh

#!/bin/sh

# Customize with your datas
APIKEY="secret_token"
DOMAIN="my_domain"
RECORD="my_record"

# DO NOT EDIT AFTER THIS LINE
CURRENTIP=$(curl -s ifconfig.co/ip)
IPLENGTH=$(echo -n ${CURRENTIP} | wc -m)

# Check that ifconfig.io give me an IP
if [ ${IPLENGTH} -gt 30 ]
then
  exit 1
fi

# Get gandi's NS for my domain
NS=$(curl -s --header "Authorization: Apikey ${APIKEY}" https://api.gandi.net/v5/livedns/domains/${DOMAIN}/nameservers | jq  --raw-output '.[0] | sub("^.*?_"; "")')
# Get the last IP recorded
LASTREGISTEREDIP=$(dig +short ${RECORD}.${DOMAIN} @${NS})

# Update if needed
if [ "${CURRENTIP}" != "${LASTREGISTEREDIP}" ]
then
  curl -s -X PUT --header "Authorization: Apikey ${APIKEY}" \
              --header "Content-Type: application/json" \
              -d "{\"rrset_values\": [\"${CURRENTIP}\"], \"rrset_ttl\": "300"}" \
              https://api.gandi.net/v5/livedns/domains/${DOMAIN}/records/${RECORD}/A
fi