#!/bin/bash
set -aeou pipefail

[[ ! -f "$HOME"/.borgbackup.env ]] && printf "\$HOME/.borgbackup.env doesn't exist!\n" && exit 1

if [[ "$(stat -c %A "$HOME"/.borgbackup.env)" != "-rw-------" ]]; then
    printf "WARNING!!!! \$HOME/.borgbackup.env has the wrong permissions!\n"
    printf "\nrun : chmod 0600 \$HOME/.borgbackup.env\n"
    exit 1
fi
# shellcheck disable=SC1090
source "${HOME}/.borgbackup.env"


# 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                    \
    --list                          \
    --stats                         \
    --show-rc                       \
    --compression lz4               \
    --exclude-caches                \
--exclude '/home/iso/*'    \
--exclude '/home/VMs/*'    \
--exclude '/var/cache/*'    \
--exclude '/var/tmp/*'    \
--exclude '/*/lost\+found/*' \
--exclude '/home/*/.cache/*'    \
--exclude '/home/*/go/*'    \
--exclude '/home/*/.wine/*'    \
--exclude '/home/*/snap/*'    \
--exclude '/home/*/Downloads/*'    \
--exclude '/home/*/Nextcloud/*'    \
--exclude '/home/*/.config/Rocket.Chat/Cache//*'    \
--exclude '/home/*/.config/discord/Cache/*'    \
--exclude '/home/*/.mozilla/firefox/*/Cache/*' \
--exclude '/home/*/.mozilla/firefox/*/minidumps/*' \
--exclude '/home/*/.mozilla/firefox/*/extensions.sqlite' \
--exclude '/home/*/.mozilla/firefox/*/urlclassifier3.sqlite' \
--exclude '/home/*/.config/google-chrome/Default/Local Storage/*' \
--exclude '/home/*/.config/google-chrome/Default/Session Storage/*' \
--exclude '/home/*/.config/google-chrome/Default/Application Cache/*' \
--exclude '/home/*/.config/google-chrome/Default/History/*' \
--exclude '/home/*/.config/google-chrome/Default/History-journal/*' \
--exclude '/home/*/.config/google-chrome/Default/History Provider Cache/*' \
--exclude '/home/*/.local/share/flatpak/*' \
--exclude '/home/*/.local/share/virtualenv/*' \
--exclude '/home/*/.local/share/virtualenvs/*' \
--exclude '/home/*/code/*' \
--exclude '/home/*/VirtualBox VMs/*' \
::'{hostname}-{now}'            \
/home \


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    14               \
    --keep-weekly   8                \
    --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}
