#!/usr/bin/env bash

set -euo pipefail

if [[ $# -ne 1 ]]; then
	echo "Pass device to grow as first argument:"
	echo "grow-last-partition-and-filesystem DEVICE"

	exit 1
fi

DEVICE="$1"

PARTITIONDATA="$(parted --script --json --fix "${DEVICE}" print)"
PARTNUMBER="$(echo "${PARTITIONDATA}" | jq -r '.disk.partitions | last | .number')"
PARTNAME="$(echo "${PARTITIONDATA}" | jq -r '.disk.partitions | last | .name')"

echo "Growing partition ${DEVICE}${PARTNUMBER} (${PARTNAME})"
echo

parted "${DEVICE}" resizepart "${PARTNUMBER}" 100%

echo
echo "Resizing filesystem"
echo

resize2fs "${DEVICE}${PARTNUMBER}"

echo "Done."