#!/bin/sh

mount {{ backup_repo_dir }}

# Setting this, so the repo does not need to be given on the commandline:
export BORG_REPO={{ backup_destination }}

# Setting this, so you won't be asked for your repository passphrase:
export BORG_PASSPHRASE='{{ backup_borg_passphrase }}'

# some helpers and error handling:
info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM

info "Starting backup"

# Backup the most important directories into an archive named after
# the machine this script is currently running on:

borg create \
    --verbose \
    --filter AME \
    --stats \
    --show-rc \
    --compression lz4 \
    --exclude-caches \
{% for path in backup_excludes %}
    --exclude '{{ path }}' \
{% endfor %}
    ::'{hostname}-{now}' \
    {{ backup_source }} \

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 '{hostname}-' \
    --show-rc \
    --keep-daily {{ backup_daily }} \
    --keep-weekly {{ backup_weekly }} \
    --keep-monthly {{ backup_monthly }} \

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

umount -l {{ backup_repo_dir }}

exit ${global_exit}