BTRFS snapper tool - backup your /boot directory (arch linux)

95-bootbackup.hook

# /etc/pacman.d/hooks/95-bootbackup.hook

[Trigger]
Operation = Upgrade
Operation = Install
Operation = Remove
Type = Path
Target = usr/lib/modules/*/vmlinuz

[Action]
Description = Backing up /boot...
When = PreTransaction
Exec = /usr/bin/sh /usr/local/bin/bootbackup.sh

bootbackup.sh

#!/bin/sh

# Put it in /usr/local/bin/bootbackup.sh and make it executable.

BKDIR="/.bootbackup/$(uname -r)"

if [[ -d $BKDIR ]]; then
	echo "Clean up $BKDIR..."
	rm -rf $BKDIR
fi

echo "Copying /boot to $BKDIR..."
mkdir -p $BKDIR
cp -r /boot/* $BKDIR

echo "Creating a snapper backup for linux $(uname -r)"
snapper -c root create -d "Backup for linux $(uname -r)"