0k-charms/logrotate/hooks/schedule_command-relation-joined

#!/bin/bash

## When writing relation script, remember:
##  - they should be idempotents
##  - they can be launched while the dockers is already up
##  - they are launched from the host
##  - the target of the link is launched first, and get a chance to ``relation-set``
##  - both side of the scripts get to use ``relation-get``.

set -e

label=launch-$SERVICE_NAME
DST=$CONFIGSTORE/$TARGET_SERVICE_NAME/etc/cron/$label
schedule=$(relation-get schedule) || true

## It should really stay at midnight as most logs are dated
schedule=${schedule:-0 0 * * *}
if ! echo "$schedule" | egrep '^\s*(([0-9/,*-]+\s+){4,4}[0-9/,*-]+|@[a-z]+)\s*$' >/dev/null 2>&1; then
    err "Unrecognized schedule '$schedule'."
    exit 1
fi

## Warning: using '\' in heredoc will be removed in the final cron file, which
##   is totally wanted: cron does not support multilines.

## Warning: 'docker -v' will use HOST directory even if launched from
##   'cron' container.
file_put "$DST" <<EOF
$schedule     root  lock $label -D -p 10 -c "\
    dc run $SERVICE_NAME" 2>&1 | ts '\%F \%T \%Z' >> /var/log/cron/${label}_script.log
EOF
chmod +x "$DST"