#!/bin/bash

# snap-pac
# https://github.com/wesbarnett/snap-pac
# Copyright (C) 2016 James W. Barnett

# 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; either version 2 of the License, or
# (at your option) any later version.

# 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.

# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

# Takes a snapper pre snapshot before a pacman transaction

if [ -f /etc/snap-pac.conf ]; then
    source /etc/snap-pac.conf
else
    echo "WARNING: /etc/snap-pac.conf is missing. Using default settings."
fi

cleanupalgo=${CLEANUP_ALGORITHM:-"number"}
description=${POST_DESCRIPTION:-"$(echo $(ps -C pacman -o args=) | sed 'sX/usr/bin/pacmanXpacmanXg')"}
configurations=${CONFIGS:-"root"}
PREFILE_PREFIX="/usr/share/libalpm/hooks.bin/snap-pac/.pre"
for x in $configurations; do
    snapper --config $x create --type pre --cleanup-algorithm $cleanupalgo --print-number --description "$description" > $PREFILE_PREFIX"_"$x
done