#!/bin/sh

# Setting this, so the repo does not need to be given on the commandline:
# export BORG_REPO=ssh://username@example.com:2022/~/backup/main
#export BORG_REPO=~/backup/

# See the section "Passphrase notes" for more infos.
#export BORG_PASSPHRASE='1ChagearC'

export BORG_REPO="ssh://100.121.203.110:2222/./repo/borg-repo"
export BORG_PASSPHRASE="1ChagearC"  # Encryption key
BACKUP_SOURCES=(
  "/home/liph/Downloads/"
  "/home/liph/dotfiles/"
  "/home/liph/scripts"
)          # What to back up
BACKUP_NAME="laptop-$(date +%Y-%m-%d)"  # Dynamic backup name

# 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"

# Initialize Borg repo (if not exists)
borg init --encryption=repokey "$BORG_REPO" 2>/dev/null || true

# 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                       \
    --progress                      \
    --compression lz4               \
    --exclude-caches                \
    --exclude 'home/*/.cache/*'     \
    --exclude 'var/tmp/*'           \
    "$BORG_REPO::$BACKUP_NAME"      \
    "${BACKUP_SOURCES[@]}"                                \
#    ::'{hostname}-{user}-{now}'                \
#     /home/liph/Documents/          \
#     /home/liph/Pictures/           \
#     /home/liph/Downloads/          
#    /etc                            \
#    /home                           \
#    /root                           \
#    /var
backup_exit=$?

info "Pruning repository"

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

borg prune                          \
    --list                          \
    --glob-archives '{hostname}-*'  \
    --show-rc                       \
    --keep-daily    7               \
    --keep-weekly   4               \
    --keep-monthly  6
    "$BORG_REPO"

prune_exit=$?

# actually free repo disk space by compacting segments

info "Compacting repository"

borg compact

compact_exit=$?

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

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

exit ${global_exit}

# Check backup integrity
borg check "$BORG_REPO"
