#!/bin/bash
set -e
if [[ "$1" = "--help" ]]; then
  echo 'Creates a dir with "%Y-%m-%d-[argument], in the current folder."'
  echo 'Without argument, just the date is used'
  exit
fi
printf -v dirbase "%(%Y-%m-%d)T" -1;
if [[ -n "$1" ]]; then
    dirbase="$dirbase"-"$1";
fi;
mkdir "$dirbase";
echo $dirbase/