move librechroot's sync into it's own file for licensing reasons

1 files changed, 40 insertions, 0 deletions

diff --git a/src/chroot-tools/librechroot.gpl2 b/src/chroot-tools/librechroot.gpl2
new file mode 100644
index 0000000..6ba361f
--- /dev/null
+++ b/src/chroot-tools/librechroot.gpl2
@@ -0,0 +1,40 @@
+#!/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
+}