#!/usr/bin/env bash
set -eo pipefail

if [[ "$1" == "-h" || "$1" == "--help" ]]; then
    cat <<EOF
Usage: $(basename "$0") [-h] <string>

Display length of a string.

Options:
    -h, --help    Show this help message

Arguments:
    string        String to measure

EOF
    exit 0
fi

if [[ ! -t 0 ]]; then # Read from stdin (pipe)
    wc -c | awk '{print $1}'
else # Read from arguments
    echo -n "$@" | wc -c | awk '{print $1}'
fi