61 lines
1.6 KiB
Bash
Executable File
61 lines
1.6 KiB
Bash
Executable File
#! /bin/bash
|
|
|
|
VERSION=$(</VERSION)
|
|
VERSION_URL="https://raw.githubusercontent.com/docker-mailserver/docker-mailserver/master/VERSION"
|
|
CHANGELOG="https://github.com/docker-mailserver/docker-mailserver/blob/master/CHANGELOG.md"
|
|
|
|
function _log
|
|
{
|
|
DATE=$(date '+%F %T')
|
|
echo "${DATE} ${1}"
|
|
}
|
|
|
|
# check for correct syntax
|
|
# number + suffix. suffix must be 's' for seconds, 'm' for minutes, 'h' for hours or 'd' for days.
|
|
if [[ ! ${UPDATE_CHECK_INTERVAL} =~ ^[0-9]+[smhd]{1}$ ]]
|
|
then
|
|
_log "Error: Invalid UPDATE_CHECK_INTERVAL value: ${UPDATE_CHECK_INTERVAL}"
|
|
_log "Info: Fallback to daily update checks"
|
|
UPDATE_CHECK_INTERVAL="1d"
|
|
fi
|
|
|
|
while true
|
|
do
|
|
# get remote version information
|
|
LATEST=$(curl -Lsf "${VERSION_URL}")
|
|
|
|
# did we get a valid response?
|
|
if [[ ${LATEST} =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]
|
|
then
|
|
_log "Info: Remote version information fetched"
|
|
|
|
# compare versions
|
|
if dpkg --compare-versions "${VERSION}" lt "${LATEST}"
|
|
then
|
|
# send mail notification to postmaster
|
|
read -r -d '' MAIL << EOM
|
|
Hello ${POSTMASTER_ADDRESS}!
|
|
|
|
There is a docker-mailserver update available on your host: $(hostname -f)
|
|
|
|
Current version: ${VERSION}
|
|
Latest version: ${LATEST}
|
|
|
|
Changelog: ${CHANGELOG}
|
|
EOM
|
|
echo "${MAIL}" | mail -s "Mailserver update available! [ ${VERSION} --> ${LATEST} ]" "${POSTMASTER_ADDRESS}" && \
|
|
|
|
_log "Info: Update available [ ${VERSION} --> ${LATEST} ]" && \
|
|
|
|
# only notify once
|
|
exit 0
|
|
else
|
|
_log "Info: No update available"
|
|
fi
|
|
else
|
|
_log "Error: Update check failed."
|
|
fi
|
|
# check again in one day
|
|
sleep "${UPDATE_CHECK_INTERVAL}"
|
|
done
|