backup

#!/bin/bash

name=$(basename "$0")
dir="${HOME}/dropbox/backup"
file=backup-$(date +%y%m%d).tar.7z

while getopts ":d:f" arg
do
	case $arg in
		d)
			dir="$OPTARG";;
		f)
			flag="overwrite";;
		:)
			echo "Error: -$OPTARG needs an argument"
			exit 1;;
		?)
			echo "Usage: $name [-d directory] [-f]"
			exit 1;;
	esac
done

if [ ! -d "$dir" ]
then
	echo "Target directory don't exists, use -d to specify."
	exit 1
fi

if [ -f "$dir/$file" ]
then
	if [ "$flag" = "overwrite" ]
	then
		rm -f $dir/$file
	else
		echo "Target file already exists, use -f to overwrite."
		exit 1
	fi
fi

tar cf - -C ~ scripts -C ~/backup firefox -C ~/documents dotfiles \
	| 7z a -p -si $dir/$file

exit 0