Add a certificate to an existing certificate using acme.sh

add-cert.sh

#!/bin/sh

# Source: https://gist.github.com/williamdes/7a63ba6af24ea91edaf988ba8078b0fa

set -eu

if [ -z "${1:-}" ]; then
  echo "Missing the domain name to add"
  echo "Use: ~/add-cert.sh mynewdomain.tld"
  echo "To add multiple domains you can use: ~/add-cert.sh \"mynewdomain.tld -d www.mynewdomain.tld\""
  exit 1
fi

CERT_DOMAIN="foo.tld"

# Fetch domain name list, select the interesting part, make it multi line to remove duplicates
DOMAINS="$(~/.acme.sh/acme.sh --list --listraw | grep -F "${CERT_DOMAIN}" | cut -d '|' -f 3 | tr ',' '\n' | sort -t '.' | uniq)"

echo "Domain list:"
echo "${DOMAINS}"
echo "-------------------"

# build it back but removing the trailing ',' the rebuild operation did
DOMAINS="$(echo "${DOMAINS}" | tr '\n' ',' | sed 's/.$//' | sed 's/,/ -d /g')"

echo "Waiting 3 seconds so you can check the list"
sleep 3

~/.acme.sh/acme.sh --issue -d "${CERT_DOMAIN}" \
        -d ${DOMAINS} \
        -d $1 \
        -w /var/www/ssl-challenges/ --server  letsencrypt --reloadcmd "service apache2 reload"