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

HTML_DIR="${1:-}"
[[ -z "${HTML_DIR}" ]] && {
  echo 'Undefined HTML_DIR.'
  exit 2
}

# Required by =sort= and =hunspell=
export LANG=C.UTF-8

for DICT in spelling/*.txt; do
  diff <(sort $DICT) $DICT || {
    echo "The $DICT dictionary is unsorted. To fix it, run:"
    echo "  LANG=C.UTF-8 sort $DICT | sponge $DICT"
    exit 1
  }
done

hunspell -l -p <(cat spelling/international.dic.txt spelling/en_US.dic.txt spelling/en_US.aff.txt) -d en_US -i utf-8 $(find "$HTML_DIR" -type f -name '*.html') | tee spelling.txt
cat spelling.txt
[[ -s spelling.txt ]] && {
  echo "Mispelled words detected by hunspell."
  cat spelling.txt
  exit 1
} || {
  echo "No words mispelled"
}