update subdomain IP address on cloudflare

set-my-ip.sh

#!/bin/sh -eu

# config
#
email=REDACTED
token=$(security find-generic-password -ws 'Cloudflare API key' -a $email)
domain=REDACTED
subdomain=REDACTED


# funcs
#
get_interface()
{
    route get 0.0.0.0 2>/dev/null | awk '/interface: /{print $2}'
}

get_ip()
{
    ifconfig -r $1 | awk '/inet /{print $2}'
}


# main
#

ip=$(get_ip $(get_interface))

## To get $record_id -- rec_load_all to get DNS Record ID
## https://www.cloudflare.com/docs/client-api.html#s3.3
record_id=REDACTED
# curl https://www.cloudflare.com/api_json.html \
#   -d a=rec_load_all \
#   -d tkn=$token \
#   -d email=$email \
#   -d z=$domain

# Set the ip for A record dev for target domain $domain
# https://www.cloudflare.com/docs/client-api.html#s5.2
echo "* Setting DNS A record for $subdomain.$domain to $ip"
curl -v https://www.cloudflare.com/api_json.html \
  -d a=rec_edit \
  -d tkn=$token \
  -d email=$email \
  -d id=$record_id \
  -d z=$domain \
  -d name=$subdomain \
  -d type=A \
  -d content=$ip \
  -d service_mode=1 \
  -d ttl=120

echo