pkgs/grow-last-partition-and-filesystem: Add command to easily grow a filesystem on a disk resized by Proxmox

pkgs/grow-last-partition-and-filesystem/default.nix

@@ -0,0 +1,17 @@
+{
+  e2fsprogs,
+  jq,
+  parted,
+  writeShellApplication,
+}:
+
+writeShellApplication {
+  name = "grow-last-partition-and-filesystem";
+  text = builtins.readFile ./grow-last-partition-and-filesystem.sh;
+  runtimeInputs = [
+    e2fsprogs
+    jq
+    parted
+  ];
+}
+

pkgs/grow-last-partition-and-filesystem/grow-last-partition-and-filesystem.sh

@@ -0,0 +1,29 @@
+#!/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."