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

end="\033[0m"
red="\033[0;31m"
red() { echo -e "${red}${1}${end}"; }

usage() {
  red "Missing argument <${1}>.\n"
  cat <<EOF
Usage:
    $0 <INPUT_DIR>

    Arguments:
        INPUT_DIR        Input directory with the static HTML to be tidy-ed

Examples:
    $0 _site/
EOF
}

INPUT_DIR="${1:-}"
[[ -z "${INPUT_DIR}" ]] && {
  usage 'INPUT_DIR'
  exit 2
}

format() {
  echo "${1}" >&2
  tidy --quiet yes -utf8 -indent -modify "${1}"
}
export -f format

find "${INPUT_DIR}" -type f -name '*.html' -print0 | \
  xargs -0 -I{} bash -c "format {}"