#!/usr/bin/env bash

# Backup script v3
# Uses restic

cd `dirname ${BASH_SOURCE-$0}`

RUNFILE=/var/run/bkp
if [ -e $RUNFILE ] && ps -p $(cat $RUNFILE) > /dev/null
then
    >&2 echo "Another backup instance is running. Skipping"
    exit 1
fi

echo $$ > $RUNFILE
echo → Backup started

source config.sh

if [ ! -z ${ETCKEEPER_COMMIT_MESSAGE+x} ]
then
    etckeeper commit "$ETCKEEPER_COMMIT_MESSAGE" &> /dev/null &
fi

# Dumping acl
ACLFILE=~/bkp/acl.gz
function bkpACL() {
    touch "$ACLFILE"
    chmod 700 "$ACLFILE"
    sudo getfacl -R "$SRC" 2> /dev/null | gzip > "$ACLFILE"
}

# Dumping database
DBFILE=/var/bkp/psql.sql.gz
function bkpPgsql() {
    touch "$DBFILE"
    chmod 700 "$DBFILE"
    pg_dumpall | gzip > "$DBFILE"
}

# Dumping database
DBFILE=./mysql.sql.gz
function bkpMysql() {
    touch "$DBFILE"
    chmod 700 "$DBFILE"
    mysqldump --defaults-extra-file=mysql.cnf --all-databases --flush-privileges | gzip > "$DBFILE"
}

# Dumping package list
PACFILE=/var/bkp/pacman.list.gz
function bkpPacman() {
    touch "$PACFILE"
    chmod 700 "$PACFILE"
    comm -23 <(pacman -Qeq | sort) <(pacman -Qgq base base-devel | sort) | gzip > "$PACFILE"
}

# Dumping package list
APTFILE=./apt.list.gz
function bkpApt() {
    touch "$APTFILE"
    chmod 700 "$APTFILE"
    apt list --installed 2> /dev/null | gzip > "$APTFILE" 
}

echo → Creating snapshots of databases

bkpPgsql &
bkpPacman &

wait

# echo "→ Restic: Transfering files"
#
# $RESTIC_CMD $RESTIC_OPTIONS backup $BACKUP_OPTIONS --cleanup-cache
#
# if [ ! -z ${FORGET_OPTIONS+x} ]
# then
#
#     echo "→ Restic: Cleaning up"
#
#     $RESTIC_CMD $RESTIC_OPTIONS forget $FORGET_OPTIONS
#
# fi

echo "→ Borg: Transfering files"

TAG="$(date -Isec)"
$BORG_CMD $BORG_OPTIONS create --stats $CREATE_OPTIONS "${BORG_REPO}::${TAG}" $FILES 2>&1

if [ ! -z ${PRUNE_OPTIONS+x} ]
then

    echo "→ Borg: Cleaning up"

    $BORG_CMD $BORG_OPTIONS prune --stats $PRUNE_OPTIONS $BORG_REPO 2>&1

fi


echo → Remove temporary files
rm "$PACFILE" "$DBFILE"

echo → Backup ended
rm $RUNFILE