#!/usr/bin/env bash
#
# Backup a folder with a timestamp
# Usage: x-backup-folder folder_to_backup [filename]
# If filename is not provided, folder_to_backup will be used
# Example: x-backup-folder ~/Documents/MyFolder
#
# Copyright (c) 2022 Ismo Vuorinen. All Rights Reserved.
# Licensed under the MIT license.

DIRECTORY=$1
FILENAME=$2

if [ -z "${DIRECTORY}" ]; then
  echo "DIRECTORY (first argument) is missing"
  echo "Usage: $0 folder_to_backup"
  exit
fi

if [ -z "${FILENAME}" ]; then
  FILENAME=$DIRECTORY
fi

FILENAME=$(
  ${FILENAME} \
    | tr '/' _ \
    | iconv -t ascii//TRANSLIT \
    | sed -r s/[^a-zA-Z0-9]+/_/g \
    | sed -r s/^_+\|-+$//g
)

TIMESTAMP=$(date "+%Y%m%d_%H%M%S")
FILENAME_TIMESTAMP="${FILENAME}_${TIMESTAMP}"

tar cvzf "${FILENAME_TIMESTAMP}.tar.gz" "${DIRECTORY}/"