Borg backup bash script for rsync.net

borg.sh

#!/bin/sh

### Setup ###

REPO_SERVER="rsync.net"
REPO_NAME="detroit"
REPO_PATH="${REPO_SERVER}:${REPO_NAME}"

# Get the date+timestamp
CURDATE="$(date -I)-$(date +%s)"

# Set the desired archive name.
ARCH_NAME="${REPO_NAME}"_"${CURDATE}"

# Helper function
info()
{
        printf "\n%s %s\n\n" "$( date )" "$*" >&2;
}

# Some basic error handling.
trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM

# ---

### Start work ###

info "Starting backup"

borg create                           \
    --verbose                         \
    --filter AME                      \
    --list                            \
    --stats                           \
    --show-rc                         \
    --compression lz4                 \
    --remote-path borg1               \
    --exclude-caches                  \
    --exclude '/home/m/.cache/*'      \
    --exclude '/home/m/.mozilla/*'    \
    --exclude '/home/m/.thunderbird/*'\
    --exclude '/home/m/.thumbnails/*' \
    --exclude '/home/m/.local/share/*'\
    --exclude '/home/m/qemu/*'        \
    --exclude '/home/m/projects/*'    \
    --exclude '/home/m/Downloads/*'   \
    --exclude '/var/cache/*'          \
    --exclude '/var/tmp/*'            \
                                      \
    "${REPO_PATH}"::"${ARCH_NAME}"    \
    /home/m/                          \
    /etc/                             \
    /var/lib/portage/                 \


backup_exit=$?

info "Pruning repository"

# Use the `prune` subcommand to maintain 7 daily, 4 weekly and 6 monthly
# archives of THIS machine. The '{hostname}-' prefix is very important to
# limit prune's operation to this machine's archives and not apply to
# other machines' archives also:

borg prune                          \
    --list                          \
    --prefix "${REPO_NAME}_"        \
    --show-rc                       \
    --remote-path borg1             \
    --keep-daily    30              \
    --keep-weekly   8               \
    --keep-monthly  3               \
    "${REPO_PATH}"

prune_exit=$?

# use highest exit code as global exit code
global_exit=$(( backup_exit > prune_exit ? backup_exit : prune_exit ))

if [ ${global_exit} -eq 1 ];
then
    info "Backup and/or Prune finished with a warning"
fi

if [ ${global_exit} -gt 1 ];
then
    info "Backup and/or Prune finished with an error"
fi

exit ${global_exit}