#! /bin/bash

REPO="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"

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}