#!/usr/bin/fish

set scriptdir (dirname (status --current-filename))

source $scriptdir/config.fish
source $scriptdir/utils.fish

if test -d $subvoldir
	echo "Warning: backup directory already exists."
	echo "Existing subvolumes won't be overwritten."
else
	echo "Creating subvolume directory..."
	mkdir $subvoldir
end

echo "Creating initial snapshots..."
for pair in (get-subvol-mounts)
	set subvol (get-subvol $pair)
	set mount (get-mount $pair)

	set safename (clean-name $subvol)
	set safepath $subvoldir/$safename

	if not test -d $safepath
		if not test -f $mount/.btrfish-ignore
			sudo btrfs subvolume snapshot -r $mount $safepath
			set snapshots $snapshots $safepath
		else
			echo ".btrfish-ignore found in $mount, skipping..."
		end
	end
end

echo "Syncing..."
sync

echo "Sending to target..."
for snapshot in $snapshots
	sudo btrfs send $snapshot | receive-on-target
	while [ $status != 0 ]
		echo "Sending failed, retrying..."
		sleep 5
		sudo btrfs send $snapshot | receive-on-target
	end
end

echo "Done!"