#!/bin/sh

set -e

# Define variables from environment
REPO=${BORG_REPO}
PASSPHRASE=${BORG_PASSPHRASE}
SOURCE=${BORG_SOURCE}
COMPRESSION=${BORG_COMPRESS:-zstd}
PRUNE_KEEP_DAILY=${BORG_PRUNE_KEEP_DAILY:-7}
PRUNE_KEEP_WEEKLY=${BORG_PRUNE_KEEP_WEEKLY:-4}
PRUNE_KEEP_MONTHLY=${BORG_PRUNE_KEEP_MONTHLY:-6}
EXCLUDE_PATTERNS=${BORG_EXCLUDE_PATTERNS:-}
CHECK_LAST=${BORG_CHECK_LAST}

BAK_ARGS=--compression $COMPRESSION

if [[ -z "$PASSPHRASE" ]]; then
	exit 1
fi

if [[ -n "$EXCLUDE_PATTERNS" ]]; then
	BAK_ARGS+=--exclude $EXCLUDE_PATTERNS
fi

# Borg backup command
borg create --stats $BAK_ARGS \
	$REPO::$(hostname)-$(date +%Y-%m-%d) $SOURCE

# Borg prune command

echo "Creating backup..."
borg prune --list $REPO --keep-daily=$PRUNE_KEEP_DAILY --keep-weekly=$PRUNE_KEEP_WEEKLY --keep-monthly=$PRUNE_KEEP_MONTHLY

# Borg check command
CHECK_ARGS=""

if [[ -n "$CHECK_LAST" ]]; then
	CHECK_ARGS+=--last $CHECK_LAST
fi
if [[ -n "$CHECK_DATA" ]]; then
	CHECK_ARGS+=--verify-data
fi

borg check $CHECK_ARGS $REPO