#!/bin/bash
#
# Create zfs snapshots for $DATASET
# https://github.com/bahamas10/zfs-prune-snapshots
#

#set -x

while getopts d:e: flag
do
    case "${flag}" in
        d) DATASET=${OPTARG};;
        e) EXPIRATION=${OPTARG};;
    esac
done

DATE=$(date '+%Y-%m-%d %H:%M:%S')

TS=$(date '+%s')
ZFS=$(which zfs)
CMD="$ZFS snapshot ${DATASET}@snap${TS}"
echo "[${DATE}] $CMD"
$CMD 2>&1 > /dev/null

ZFS_PRUNE_SNAPSHOTS=$(which zfs-prune-snapshots)
CMD="$ZFS_PRUNE_SNAPSHOTS -p 'snap' $EXPIRATION $DATASET"
echo "[${DATE}] $CMD"
$CMD 2>&1 > /dev/null