Add partial bootstrapping

bootstrap.fish

@@ -6,12 +6,12 @@ source $scriptdir/config.fish
 source $scriptdir/utils.fish
 
 if test -d $subvoldir
-	echo "Backup directory already exists, aborting..."
-	exit
-end
-
+	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)
@@ -21,10 +21,11 @@ for pair in (get-subvol-mounts)
 	set safename (clean-name $subvol)
 	set safepath $subvoldir/$safename
 
+	if not test -d $safepath
 		sudo btrfs subvolume snapshot -r $mount $safepath
-
 		set snapshots $snapshots $safepath
 	end
+end
 
 echo "Syncing..."
 sync