EASY Compressed Backup Script [ ANY FILES/DIRECTORIES ]

#!/bin/bash

#/#/ Define any tools needed here seperated only by a "\:space:"\
needed_tool=' yad rsync tar '

#//* Begin System Tool Search
require_tools ()
{
    local NOT_AVAIL=""
    for TOOL in $needed_tool; do
        if [ "`which $TOOL`" 2> /dev/null == "" ]; then
    NOT_AVAIL="$NOT_AVAIL $TOOL";
    fi
    done
    if [[ "$NOT_AVAIL" != "" ]]; then
    echo "ERROR: The following required tool(s) cannot be found: $NOT_AVAIL"
        exit 3
    fi
}

# Check file system tools before we start
require_tools || exit 1

# VARIABLES
THIS_DIR=$PWD/TMP_BKUP
MK_DIR=$(mkdir $THIS_DIR)
FILE=./backup.$(echo $RANDOM).tar
DESTIN="$(yad --title "Choose Direcotory To Backup" --file-selection --directory)"

# PREPERATION
$MK_DIR

# ADDING FILE TO ARCHIVE
rsync -vrhu --append-verify --progress "$DESTIN" "$THIS_DIR"
echo -e "Files copied to temporary directory; press [E]nter to create compressed archive and remove the temporary directory: "
read NULL

# COMPRESS BACKUP AND REMOVE FILES
tar -vcf $FILE --remove-files "$THIS_DIR"
echo -e "\nCompressed archive backup file has been created.\nPress [E]nter to cleanup and finish: "
read NULL1

# FINISH
exit 0