Create a tarball, using a progress bar

tarpv

#!/usr/bin/env bash

# First arg is always option
arg1="$1"
shift

# Find first non-option
for i in "$@"; do
  if [[ -z "$dir" && "$i" != -* ]]; then
    dir="$i"
  fi
done

size=$(du -sk "$dir" | cut -f1)
tar "$arg1" "$@" | pv -barpets "${size}k"