mirror of
https://github.com/docker-mailserver/docker-mailserver.git
synced 2024-01-19 02:48:50 +00:00
55 lines
1.8 KiB
Bash
Executable file
55 lines
1.8 KiB
Bash
Executable file
#!/bin/bash
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# shellcheck source=./helpers/log.sh
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source /usr/local/bin/helpers/log.sh
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VERSION="${DMS_RELEASE#v}"
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VERSION_URL='https://github.com/docker-mailserver/docker-mailserver/releases/latest'
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CHANGELOG_URL='https://github.com/docker-mailserver/docker-mailserver/blob/master/CHANGELOG.md'
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# check for correct syntax
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# number + suffix. suffix must be 's' for seconds, 'm' for minutes, 'h' for hours or 'd' for days.
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if [[ ! ${UPDATE_CHECK_INTERVAL} =~ ^[0-9]+[smhd]{1}$ ]]; then
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_log_with_date 'warn' "Invalid 'UPDATE_CHECK_INTERVAL' value '${UPDATE_CHECK_INTERVAL}'"
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_log_with_date 'warn' 'Falling back to daily update checks'
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UPDATE_CHECK_INTERVAL='1d'
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fi
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while true; do
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# get remote version information
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# JSON response provides a field for the release tag, the `v` prefix is removed with `[1:]`
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LATEST=$(curl -sfL -H 'accept: application/json' "${VERSION_URL}" | jaq -r '.tag_name[1:]')
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# did we get a valid response?
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if [[ ${LATEST} =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
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_log_with_date 'debug' 'Remote version information fetched'
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# compare versions
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if dpkg --compare-versions "${VERSION}" lt "${LATEST}"; then
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# send mail notification to postmaster
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read -r -d '#' MAIL << EOF
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Hello ${POSTMASTER_ADDRESS}!
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There is a docker-mailserver update available on your host: $(hostname -f)
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Current version: ${VERSION}
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Latest version: ${LATEST}
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Changelog: ${CHANGELOG_URL}#END
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EOF
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_log_with_date 'info' "Update available [ ${VERSION} --> ${LATEST} ]"
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# only notify once
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echo "${MAIL}" | mail -s "Mailserver update available! [ ${VERSION} --> ${LATEST} ]" "${POSTMASTER_ADDRESS}" && exit 0
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else
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_log_with_date 'info' 'No update available'
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fi
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else
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_log_with_date 'warn' 'Update check failed'
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fi
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# check again in 'UPDATE_CHECK_INTERVAL' time
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sleep "${UPDATE_CHECK_INTERVAL}"
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done
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