#! /bin/bash

REPO="ssh://bryan@172.16.1.83~/borg-backups"
PASSPHRASE="uD6Db2MrhxdCoKmD4gpW"
SSH_KEY="/mnt/data/home/bryan/.ssh/id_rsa"
EXCLUDE_FILE="./backup-exclude"
DIR_TO_BACKUP="/"

export BORG_REPO=$REPO
export BORG_PASSPHRASE=$PASSPHRASE
export BORG_RSH="ssh -i $SSH_KEY"

info(){ printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM

info "Starting backup"

sudo borg create			\
    --verbose				\
    --filter AME			\
    --list				\
    --stats				\
    --show-rc				\
    --compression lz4			\
    --exclude-caches			\
    --exclude-from "${EXCLUDE_FILE}"	\

    ::'{hostname}-{now}'		\
    "${DIR_TO_BACKUP}"

backup_exit=$?

info "Pruning repository"

borg prune			\
    --list			\
    --prefix '{hostname}-'	\
    --show-rc			\
    --keep-daily	7	\
    --keep-weekly	4	\
    --keep-monthly	6	\

prune_exit=$?


# use highest exit code as global exit code

global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))

if [ ${global_exit} -eq 0 ]; then
    info "Backup and Prune finished successfully"
elif [ ${global_exit} -eq 1 ]; then
    info "Backup and/or Prune finished with warnings"
else
    info "Backup and/or Prune finished with errors"
fi

exit ${global_exit}