markdown slides with reveal build snippet

build.sh

#!/usr/bin/env bash

base_build() {
  build_dir="./build"
  mkdir -p "${build_dir}"
  # OSX build support. BSD tar vs GNU tar issue
  if [[ "$(uname)" == "Darwin" ]]; then
      alias tar=gtar
  fi
  # This takes all files that have been at least added to git
  # tars them up and extracts them in the build dir
  git ls-files \
    | tar --files-from - --create --file - \
    | tar --directory "${build_dir}" \
      --exclude='trainer-docs.md' \
      --extract --file -
}

exercises() {
  browserify -r tape -r tape-catch -r tape-dom > "${build_dir}/common/tape.js"
  browserify -r events > "${build_dir}/common/events.js"

  find "${build_dir}" -type f -name '*-exercises.js' | {
    while IFS= read -r exercises; do
      topic_name=$(basename "${exercises}" -exercises.js)
      course_name=$(basename "$(dirname "${exercises}")")
      # if [[ ! -e "${build_dir}/${course_name}/01-welcome-exercises.js" ]]; then
      #   cp "${build_dir}/common/01-welcome-"* "${build_dir}/${course_name}"
      # fi
      sed -e "s/TITLE/${topic_name}/g" \
        -e "s/TOPIC/${topic_name}/g" \
        "${build_dir}/common/exercises.html" > \
        "${build_dir}/${course_name}/${topic_name}-exercises.html"
      echo -n "."
    done
  }
}

slides_html() {
  cp -r node_modules/reveal.js "${build_dir}"
  # reveal.js node deps are huge (esp socket.io)
  rm -rf "${build_dir}/reveal.js/node_modules"
  # fonts for other themes are huge
  rm -rf "${build_dir}/reveal.js/lib/font"
  find "${build_dir}" -type f -name '*-slides.md' | {
    while IFS= read -r markdown
    do
      local topic_name
      topic_name=$(basename "${markdown}" -slides.md)
      local course_dir
      course_dir="$(dirname "${markdown}")"
      mkdir -p "${course_dir}"

      ##### reveal.js for live presentations #####
      cat "${build_dir}/common/slides-header.html" "${markdown}" "${build_dir}/common/slides-footer.html" \
        | sed -e "s/TITLE/${topic_name}/g" \
        > "${course_dir}/${topic_name}-slides.html"

      echo -n "."
    done
  }
}

slides_pdf() {
  find "${build_dir}" -type f -name '*-slides.md' | {
    while IFS= read -r markdown
    do
      local topic_name
      topic_name=$(basename "${markdown}" -slides.md)
      local course_dir
      course_dir="$(dirname "${markdown}")"

      ##### markdown to html for learners #####
      cp "${build_dir}/common/pdf-header.html" "${course_dir}/${topic_name}.html"
      "$(npm bin)/marked" --gfm "${markdown}" >> "${course_dir}/${topic_name}.html"

      ##### html to pdf for learners #####
      wkhtmltopdf --quiet --enable-local-file-access "${course_dir}/${topic_name}.html" "${course_dir}/${topic_name}-slides.pdf"
      rm "${course_dir}/${topic_name}.html"
      echo -n "."
    done
  }
  # echo "Waiting for PDFs to finish"
  # local failed_count=0
  # for job in `jobs -p`; do
  #   echo $job
  #   wait $job || failed_count=$((${failed_count} + 1))
  # done
  #
  # if [[ ${failed_count} -ne 0 ]];
  # then
  #   echo "Failed to render ${failed_count} PDFs"
  #   exit ${failed_count}
  # fi
}

build_zip() {
  cd "${build_dir}" > /dev/null
  local stamp
  stamp=$(date +%Y%m%d)
  find . -type d -maxdepth 1 -mindepth 1 -not -name bin -not -name common -not -name reveal.js | {
    while IFS= read -r course_dir
    do
      zip --quiet --recurse-paths --symlinks "${course_dir}-${stamp}.zip" "${course_dir}" common reveal.js
    done
  }
  # zip --quiet --recurse-paths --symlinks "all-courses-$(date +%Y%m%d).zip" . --exclude '*.zip'
  cd - > /dev/null
}

print_paths() {
  find "${build_dir}" -type f -name '*-exercises.*'
}

main() {
  cd "$(dirname "$0")/.." || exit
  source "./bin/_strict.sh"
  PATH="$(npm bin):${PATH}"

  echo -ne "base git build…"
  base_build
  echo -ne "✓\nslides md -> html"
  slides_html
  echo -ne "✓\nexercises"
  exercises
  echo -ne "✓\nslides html -> pdf"
  if [[ "$1" == "fast" ]]; then
    return
  fi
  slides_pdf
  echo -ne "✓\nzip…"
  build_zip
  echo "✓"
  print_paths
}

main "$@"