#!/bin/bash

# Copyright 2013 Peter Palfrader
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


set -e
set -u

host="$(hostname)"
base="/Auto/net-backup/backups/"
keep=12W

if [ "${1:-}" = "-v" ]; then
	verbose="--terminal-verbosity=5"
	verboseexpire="--terminal-verbosity=5"
else
	verbose=""
	verboseexpire="--terminal-verbosity=2"
fi

if ! [ -d "$base" ] ; then
	echo "$base does not exist" >&2
	exit 1
fi



for dir in $(df -Pkl -x tmpfs -x iso9660 -x devtmpfs | tail -n +2 | awk '{print $NF}' | sort -u); do
	[ -e "$dir/.nobackup" ] && continue

	if [ "$dir" = '/' ]; then
		cleaned="root"
	else
		cleaned="$(echo "$dir" | tr '/' '-')"
	fi
	tgt="$base/$host-$cleaned"

	if [ -e "$dir"/.rdiff-exclude ]; then
		exclude="--exclude-globbing-filelist=$dir/.rdiff-exclude"
	else
		exclude=""
	fi

	rdiff-backup $verbose $exclude --no-acls --exclude-sockets --exclude-other-filesystems "$dir" "$tgt" || echo "Warning: rdiff-backup $host:$dir -> $tgt failed."
	rdiff-backup $verboseexpire --force --remove-older-than "$keep" "$tgt" || echo "Warning: rdiff-backup remove old backups for $tgt ($host:$dir) failed."
done