build

#!/usr/bin/env bash

shopt -s globstar

# get array of all posts, also used to pick latest post for home page
declare -a unsorted_posts
for post in $(ls -t posts/*.md); do
  if [[ $post != "posts/index.md" ]]; then
    # get the front matter
    post_fm=$(sed -n '/^---$/,/^---$/p' "${post}")

    # skip if draft
    if [[ ${post_fm} == *"draft: true"* ]]; then
      echo "Skipping draft ${post}"
      continue
    fi

    post_date=$(sed -n 's/^date: //p' <<< "${post_fm}")
    if [[ -z ${post_date} ]]; then
      echo "Error: no date in frontmatter of ${post}"
      continue
    fi

    post_name=$(basename $post)
    output_name=${post_name%*.md}
    post_name="${post_date}_${post_name}"
    unsorted_posts+=(${post_name})

    pandoc -s "${post}" -o "posts/${output_name}.html" --template assets/template.html \
      --variable assets-folder="../assets" || \
    echo "Error: failed to build ${md}"
  fi
done

# sort all posts by created date, also used to get latest post
declare -a sorted_posts
IFS=$'\n' sorted_posts=($(sort -r <<< ${unsorted_posts[*]}))
unset IFS

declare -a latest_posts
for post in ${sorted_posts[*]}; do
  name_to_add="${post/*_/}"
  name_to_add="${name_to_add%.md}"
#  echo ${name_to_add}
  latest_posts+=("--variable latest-posts=${name_to_add%*.md}")
done

# don't use latest post, use featured post instead
featured_post="chatgpt-site-improvements.md"

# latest_post="${sorted_posts[0]/*_/}"
# echo "${latest_post}"
# latest_post_text="$(pandoc posts/${latest_post} --template assets/post-preview-template.html --variable post-link=${latest_post%.md})"

featured_post_text="$(pandoc posts/${featured_post} --template assets/post-preview-template.html --variable post-link=${featured_post%.md})"
# echo "${featured_post_text}"

for md in **/*.md; do
  dir=$(dirname $md)
  filename=$(basename $md)
  filename=${filename%*.md}

  assets_folder="assets"

  if [[ ${dir} != "."  ]]; then
    assets_folder="../assets"
  fi

  # don't build project readme
  if [[ ${md} == "README.md" ]]; then
    continue
  fi

  # build homepage
  if [[ ${md} == "index.md" ]]; then
    echo "building ${md}"
    pandoc -s "${md}" -o "${dir}"/index.html --template assets/template.html \
      --variable assets-folder="${assets_folder}" \
      --variable post-preview="${featured_post_text}"
    continue
  fi

  # build posts page
  if [[ ${md} == "posts/index.md" ]]; then
    echo "building ${md}"
    pandoc -s "${md}" -o "${dir}"/index.html --template assets/template.html \
      --variable assets-folder="${assets_folder}" \
      ${latest_posts[*]} || \
      echo "Error: failed to build ${md}"
    continue
  fi

  # posts already built
  if [[ ${dir} == "posts" ]]; then
    continue
  fi

  # all other pages
  echo "building ${md}"
  pandoc -s "${md}" -o "${dir}"/${filename}.html --template assets/template.html \
    --variable assets-folder="${assets_folder}" || \
    echo "Error: failed to build ${md}"
done