# Thanks to http://www.sanitarium.net/golug/rsync_backups_2010.html for the
# idea.
-# Copyright (C) 2011-2013 Simon Ruderich
+# Copyright (C) 2011-2014 Simon Ruderich
#
# 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
cd "$1" || exit 1
shift
-dest=`echo backup-*`
-if test "x$dest" != 'xbackup-*'; then
- # -F and grep is used to list only directories, zsh's *(/) would be great.
- dest="`pwd`/`ls -1dF backup-* | grep / | tail -n1`"
-fi
+# Get absolute path to last backup directory.
+for x in backup-*; do
+ test -d "$x" || continue
+ dest="../$x" # relative to destination directory
+done
target=backup-`date '+%Y-%m-%d-%H-%M-%S'`
mkdir current
rsync \
--verbose --itemize-changes --human-readable \
- --archive --hard-links --numeric-ids --one-file-system \
+ --archive --hard-links --sparse --numeric-ids --one-file-system \
--link-dest="$dest" \
"$@" current \
-&& mv current "$target"
+|| {
+ # Try to remove "current" without changing the exit code. In case the
+ # connection failed without transferring any files, we want the next
+ # backup to be able to run.
+ code=$?
+ rmdir current 2>/dev/null || true
+ exit $code
+}
+mv current "$target"