backup

#!/bin/bash

usage() {
	script="$(basename "$0")"

	cat <<-DOC
	Usage: $script [Options] {address}

	rsync ip:dir ip:dir
	rsync -avh file.zip erik@108.61.119.116:~/Docs

	0) Both sender/receiver must have the same directory layout. No spaces allowed in either path.
	1) Navigate to the directory you want to backup
        a) $script -r rairden.dev       # receive
        b) $script -s -n rairden.dev    # send and -n is dry-run

	Options:
        -s, --send         send
        -r, --receive      receive
        -n, --dry-run      dry-run
        -h, --help         show this help message
DOC
}

printSummary() {
	createdFiles=$(echo "$1" | pcregrep -o1 "Number of created files:\s(.*)")
	transferSize=$(echo "$1" | pcregrep -o1 "Total transferred file size:\s(.*)")
	echo "     New files: $createdFiles"
	echo "Transfer total: $transferSize"
}

if [ $# -lt 1 ]; then
	echo "Try '$script --help' for more information."
	exit 1
fi

send=false
receive=false
dryrun=false
dry=

copyDir=$(pwd)
parentDir=$(dirname "$copyDir")

while [ $# -gt 0 ]; do
	case $1 in
	-s | --send)
		send=true
		;;
	-r | --receive)
		receive=true
		;;
	-n | --dry-run)
		dryrun=true
		dry='-n'
		;;
	-h | --help)
		usage
		exit 1
		;;
	*)
		host=$1
	esac
	shift
done

if $dryrun; then
	echo -e "      (DRY RUN)"
fi

if $send; then
	output=$(rsync -avh --del $dry --stats "$copyDir" "$host:$parentDir")
	echo -e "          [CMD] rsync -avh $dry --stats $copyDir $host:$copyDir"
	printSummary "$output"
elif $receive; then
	output=$(rsync -avh $dry --stats "$host:$copyDir" "$parentDir")
	echo -e "          [CMD] rsync -avh $dry --stats $host:$copyDir $parentDir"
	printSummary "$output"
else
	echo "Must give -s or -r argument to send or receieve. Try -h for more info."
	exit
fi