Added BTRFS snap hook

00-autosnap-btrfs.hook

@@ -0,0 +1,14 @@
+[Trigger]
+Type=Package
+Operation=Install
+Operation=Upgrade
+Operation=Remove
+Target=*
+
+[Action]
+Description=Making BTRFS snapshot...
+Depends=btrfs-progs
+When=PreTransaction
+Exec=/usr/bin/sh -c "/usr/bin/btrfs subvolume snapshot / /snaps/root@$(date +%Y-%m-%d_%H-%M-%S)_pacman_pre"
+AbortOnFail
+NeedsTargets