#!/bin/bash

if [ -z "$1" ] || [ -z "$2" ]; then
    echo "Usage: $0 prefix snapshot"
    exit 1
fi

set -eu

PREFIX="$1"
SNAPSHOT="$2"
DATASET="${SNAPSHOT%@*}"
MOUNTPOINT="${PREFIX}/$(echo "$DATASET" | cut -d@ -f1 | cut -d/ -f2- | tr '/' '_')"

if [ "$(zfs get -H -o value backup:skip "$DATASET")" = "true" ]; then
    exit 0
fi

set -x
mkdir -p "$MOUNTPOINT"
mount -t zfs "$SNAPSHOT" "$MOUNTPOINT"