#!/bin/bash 

shopt -s nullglob
shopt -s extglob

f="${1}"
f="${f%/}"
b=1
for g in v+([0-9])__"${f}"
do
	g="${g#v}"
	g="${g%%__*}"
	(( b = (g > b) ? g : b ))
done
(( b = b + 1 ))
echo Creating v${b}__"${f}"
cp -r "${f}" v${b}__"${f}"