#!/bin/bash
# Contains code derived from devtools' "makechrootpkg"

# Copyright 2011-2012 The Arch Linux Development Team
# Copyright 2012 Luke Shumaker
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

sync() {
	if [[ $CHROOTCOPY = root ]]; then
		error "Cannot sync the root copy with itself"
		exit 1
	fi

	lock_open_read  8 "$rootdir" "Locking clean chroot"

	stat_busy 'Creating clean working copy'
	local use_rsync=false
	if type -P btrfs >/dev/null; then
		[[ -d $copydir ]] && btrfs subvolume delete "$copydir" &>/dev/null
		btrfs subvolume snapshot "$chrootdir/root" "$copydir" &>/dev/null || use_rsync=true
	else
		use_rsync=true
	fi

	if $use_rsync; then
		mkdir -p "$copydir"
		rsync -a --delete -q -W -x "$CHROOTDIR/$CHROOT/root/" "$copydir"
	fi
	stat_done

	lock_close 8
}