generate-pdf.yml

name: Generate PDF for Textbook

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  build_and_generate_pdf:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Install Pandoc
        run: sudo apt-get install -y pandoc texlive texlive-latex-extra poppler-utils

      - name: Install Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.11'

      - name: Generate PDFs from the textbook Markdown files
        run: |
          mkdir -p pdf_output
          
          file_list=(
            "crypto/index.md"
            "crypto/intro.md"
            "crypto/symmetric.md"
            "crypto/hashes.md"
            "crypto/macs.md"
            "crypto/prng.md"
            "crypto/key-exchange.md"
            "crypto/public-key.md"
            "crypto/signatures.md"
            "crypto/certificates.md"
            "crypto/passwords.md"
            "crypto/case-studies.md"
            "crypto/bitcoin.md"
          )
          for md_file in "${file_list[@]}"; do
            pdf_file_name="pdf_output/$(echo "$md_file" | sed 's/\//_/g').pdf"
            python3 fix-image-paths.py "$md_file" | pandoc -V geometry:margin=1in --pdf-engine=pdflatex -o "$pdf_file_name"

            if [ ! -f "$pdf_file_name" ]; then
              echo "Error: PDF file $pdf_file_name not created!" >&2
              exit 1
            fi
          done
          pdfunite \
            "pdf_output/crypto_index.md.pdf" \
            "pdf_output/crypto_intro.md.pdf" \
            "pdf_output/crypto_symmetric.md.pdf" \
            "pdf_output/crypto_hashes.md.pdf" \
            "pdf_output/crypto_macs.md.pdf" \
            "pdf_output/crypto_prng.md.pdf" \
            "pdf_output/crypto_key-exchange.md.pdf" \
            "pdf_output/crypto_public-key.md.pdf" \
            "pdf_output/crypto_signatures.md.pdf" \
            "pdf_output/crypto_certificates.md.pdf" \
            "pdf_output/crypto_passwords.md.pdf" \
            "pdf_output/crypto_case-studies.md.pdf" \
            "pdf_output/crypto_bitcoin.md.pdf" \
            "textbook_full.pdf"

      - name: Upload PDF to site
        uses: actions/upload-artifact@v3
        with:
          name: textbook-full
          path: textbook_full.pdf

      - name: Commit and push changes only on push
        if: github.event_name == 'push'
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "GitHub Actions"
          git add textbook_full.pdf
          git commit -m "Update full PDF of textbook on site"
          git push
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}