Annotate WireGuard wg command output with comments from the config file

annnotate.sh

#!/bin/bash

if [ "$EUID" -ne 0 ]
  then echo "Please run as root"
  exit
fi


function annotate {
	declare -A PEER_COMMENTS
	local last_comment='';

	while read -r line; do
		if [[ "$line" =~ ^#[[:space:]]*(.*) ]]; then
			last_comment="${BASH_REMATCH[1]}"
		elif [[ "$line" =~ ^PublicKey[[:space:]]*=[[:space:]]*(.*) ]]; then
			PEER_COMMENTS[${BASH_REMATCH[1]}]="$last_comment"
		fi
	done < /etc/wireguard/$1.conf


	while IFS='\n' read -r line; do
		#if [[ "$line" =~ .*peer.*:.*(.*).* ]]; then
		if [[ "$line" =~ .*peer.*:.*33m(.*)=.* ]]; then
			key="${BASH_REMATCH[1]}="
			echo "# ${PEER_COMMENTS[$key]}"
		fi
		echo "$line"
	done < <(WG_COLOR_MODE=always wg show $1)
}

for iface in $(wg show interfaces); do
	annotate $iface
done