#!/bin/sh

# Quick and dirty NRPE script to check if
# the local version of Gitea is up to date.

# Stop at first uncatched error
set -e

usage() {
	cat <<EOF
$0 -H hostname -I address

TODO: write the rest :)
EOF
}

while getopts H:I: f; do
	case "$f" in
		'H')
			HOSTNAME="$OPTARG"
			;;

		'I')
			HOSTADDRESS="$OPTARG"
			# If there is some ":" in the adress, we treat it as IPv6
			if echo "$HOSTADDRESS" | grep ":" >/dev/null 2>&1; then
				HOSTADDRESS="[$HOSTADDRESS]"
			fi
			;;

		\?)
			usage
			exit 1
			;;
	esac
done


INSTALLED_VERSION="$( wget -O - --header="Host: $HOSTNAME" --no-check-certificate -q "https://$HOSTADDRESS/api/v1/version" | sed -n 's/{"version":"\([^"]\+\)"}/\1/p' )"
UPSTREAM_VERSION="$( wget -q -O - "https://dl.gitea.io/gitea/" | egrep -- '<a href="/gitea/[0-9]+\.[0-9]+\.[0-9]+/?"' | egrep -o "[0-9]+\.[0-9]+\.[0-9]+" | sort --version-sort | tail -n 1 )"

if [ "$UPSTREAM_VERSION" = "$INSTALLED_VERSION" ]; then
	echo "OK ($INSTALLED_VERSION / $UPSTREAM_VERSION)"
	exit 0
else
	echo "WARNING ($INSTALLED_VERSION / $UPSTREAM_VERSION)"
	exit 1
fi