generate_sitemap.sh

#!/bin/bash

sitemap="sitemap.xml"
website_link="https://moto-penangf.github.io/documentation"
ignore=(
_sidebar.md
_coverpage.md
_navbar.md
)

urlencode() {
  local length="${#1}"
  for (( i = 0; i < length; i++ )); do
    local c="${1:i:1}"
    case $c in
      [a-zA-Z0-9.~_+-/]) printf "$c" ;;
      *) printf "$c" | xxd -p -c1 | while read x; do printf "%%%s" "$x"; done ;;
    esac
  done
}
files=$( \
  git ls-files -z '*.md' | \
  xargs -0 -n1 -I{} -- git log -1 --format="%at {}" {} | \
  sort -r | \
  cut -d " " -f2-)

items=""
for file in ${files[@]}; do
  [[ ${ignore[@]/${file}/} != ${ignore[@]} ]] && continue
  echo $file
  encode=$(urlencode "${file::-3}")
  link="$website_link/$encode"
  date=$(git log -1 --format="%ad" --date="iso-strict-local" -- $file)
  item="
  <url>
    <loc>$link</loc>
    <lastmod>$date</lastmod>
  </url>
  "
  items="$items $item"
done

now=$(git log -1 --format="%ad" --date="iso-strict-local")
sitemap_content="<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<urlset xmlns=\"http://www.sitemaps.org/schemas/sitemap/0.9\">
  <url>
    <loc>$website_link</loc>
    <lastmod>$now</lastmod>
  </url>
  $items
</urlset>"

echo "$sitemap_content" > $sitemap