#!/bin/bash 
#
# Nagios plugin to check mastodon version
#

# program return value 
#       0 : OK
#       1 : CRITICAL
#       2 : WARNING new version available
#       3 : UNKNOWN github or local repo not probable

LAST_VERSION=$(curl -L --silent https://api.github.com/repos/tootsuite/mastodon/releases | jq -r '.[0].name')

INSTALLED_VERSION=$(git -C /home/mastodon/live/ branch | grep ^* | sed -e 's/.*live-//')

if [ -z "$LAST_VERSION" ]; then
        echo "UNKNOWN : cannot get version from github."
            exit 3
fi

if [ -z "$INSTALLED_VERSION" ]; then
        echo "UNKNOWN : cannot get version from /home/mastodon/live"
            exit 3
fi

if [ "$LAST_VERSION" = "$INSTALLED_VERSION" ]; then
        echo "OK : Installed version is $INSTALLED_VERSION, last version is $LAST_VERSION"
            exit 0
elif [[ $LAST_VERSION =~ rc[0-9]+$ ]]; then
        echo "OK : Installed version is $INSTALLED_VERSION, last version is Release Candidate : $LAST_VERSION"
        else
                echo "WARNING : new version available, installed is $INSTALLED_VERSION, last is $LAST_VERSION."
                    exit 2
fi