dokku post-release hook for crontab jobs

post-release

#!/usr/bin/env bash
set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x

APP="$1"; IMAGE="dokku/$APP"

CRONTABS_DIR=$DOKKU_ROOT/.crontab
CONFIG_FILE=$CRONTABS_DIR/$APP.conf

mkdir -p "$CRONTABS_DIR";

docker run -i -a stdout "$IMAGE" cat /app/crontab \
 | sed s_'%CONTAINER'_"docker run -e CRON=1 -i -a stdout $IMAGE /exec"_g > "$CONFIG_FILE"

[ ! -s "$CONFIG_FILE" ] && echo "       Installing crontab" || rm "$CONFIG_FILE" || :

cat "$CRONTABS_DIR"/* > "$CRONTABS_DIR/crontab"

crontab "$CRONTABS_DIR/crontab"