#!/bin/bash

# Add the below two lines (w/o comment) to crontab for docker user:
# TZ=UTC
# 0 12 22-28 * * /path/to/watchtowerOneTimeRun.sh

# Exit unless Saturday
if [[ $(date +%u) -ne 6 ]] ; then
    exit
fi

# Variables
readonly HOST_HOSTNAME="${HOSTNAME}"

# Docker run command
docker run --rm \
    -v /var/run/docker.sock:/var/run/docker.sock \
    -e WATCHTOWER_NOTIFICATIONS=shoutrrr \
    -e WATCHTOWER_NOTIFICATION_URL=ntfy://docker:<NTFY_NOTIFICATION_URL> \
    -e WATCHTOWER_NOTIFICATIONS_HOSTNAME="${HOST_HOSTNAME}" \
    -e WATCHTOWER_NOTIFICATION_TEMPLATE="{{range .}}{{.Time.Format \"2006-02-01 15:04:05\"}} ({{.Level}}): {{.Message}}{{println}}{{end}}" \
    containrrr/watchtower:latest \
    --no-startup-message \
    --run-once \
    --monitor-only