dotfiles/home/.local/bin/incremental-backup

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#!/bin/bash
# Script to perform incremental backups using rsync
# It is often ran as crontab rule for automated backup solution
#
# This script will respect .rsync-filter files, which can be used
# to define custom exclude rules for files/dirs in which it is present
if [ $# -ge 2 ]; then
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echo "Invalid amount of arguments passed!"
echo "Arguments: [Source path] [Backup path]"
echo " Source path: directory to be backed up, usually '/'"
echo " Backup path: directory to back up to (destination), usually mounted drive"
exit
fi
SOURCE_DIR="$1"
BACKUP_DIR="$2"
DATETIME="$(date '+%Y-%m-%d_%H:%M:%S')"
BACKUP_PATH="${BACKUP_DIR}/${DATETIME}"
LATEST_LINK="${BACKUP_DIR}/latest"
mkdir -p "$BACKUP_DIR"
rsync -avHAXS \
--delete \
--filter='dir-merge /.rsync-filter' \
--link-dest "${LATEST_LINK}" \
"${@:3}" "${SOURCE_DIR}/" "${BACKUP_PATH}"
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ln -sf "${BACKUP_PATH}" "${LATEST_LINK}"