convert-from-markdown.yml

name: Markdown conversion

on:
  push:
    paths:
      - "**/*.md"
    branches:
      - "*"

jobs:
  process-markdown:
    runs-on: ubuntu-latest
    container:
      image: pandoc/latex:3.6.3-ubuntu # Using the Pandoc LaTeX Docker image
      options: --entrypoint=sh  # Use `sh` as the entrypoint

    steps:

      - name: Install Git inside the container
        run: |
          apt-get update
          apt-get install -y git  # Install git

      - name: Checkout code
        uses: actions/checkout@v4
 
      - name: Configure Git Safe Directory
        run: |
          # Get the current working directory and set it as a safe directory for git
          current_directory=$(pwd)
          echo "Current directory: $current_directory"
          git config --global --add safe.directory "$current_directory"

      - name: Identify Modified Markdown Files
        run: |
          # Get a list of modified markdown files, including README.md
          echo "Before SHA: ${{ github.event.before }}"
          echo "Current SHA: ${{ github.sha }}"
          if [ "${{ github.event.before }}" = "0000000000000000000000000000000000000000" ]; then
            echo "First push to this branch. Listing all markdown files in the commit."
            git show --name-status --pretty="" ${{ github.sha }} | grep '\.md$' | grep -v -E '(pandoc|latex|pdf)/' > markdown_changes.txt || echo "Changes to md files in pandoc/latex/pdf folders"
          else
            if git cat-file -e ${{ github.event.before }}^{commit} 2>/dev/null; then
              echo "Previous commit exists locally, running diff."
              git diff --name-status ${{ github.event.before }} ${{ github.sha }} | grep '\.md$' | grep -v -E '(pandoc|latex|pdf)/' > markdown_changes.txt || echo "Changes to md files in pandoc/latex/pdf folders"
            else
              echo "Fetching origin for previous commit ${{ github.event.before }}."
              git fetch origin ${{ github.event.before }} --depth=1 || echo "git fetch failed"
              git diff --name-status ${{ github.event.before }} ${{ github.sha }} | grep '\.md$' | grep -v -E '(pandoc|latex|pdf)/' > markdown_changes.txt || echo "Changes to md files in pandoc/latex/pdf folders"
            fi
          fi
          echo "Contents of markdown_changes.txt:"
          cat markdown_changes.txt
        

      - name: Convert Modified and Handle Deleted Markdown Files
        run: |
          # Create the pdf and latex directories if they don't exist
          mkdir -p pdf latex
          
          # Loop through the list of modified markdown files and convert each one individually
          while IFS= read -r line; do
            # Use awk to split the line by the tab character
            status=$(echo "$line" | awk -F'\t' '{print $1}')
            file=$(echo "$line" | awk -F'\t' '{print $2}')

            # Trim spaces (in case any leading/trailing spaces exist)
            status=$(echo "$status" | xargs)
            file=$(echo "$file" | xargs)

            # Debugging: print the status and file
            echo "Status: '$status', File: '$file'"

            # Get the base filename without the extension
            currentFileName="$(basename "$file" .md)"
            currentFilePath="$file"

            if [ "$status" = "A" ] || [ "$status" = "M" ]; then
              # Convert markdown to PDF
              echo "Converting $currentFilePath to PDF..."
              pandoc -f markdown -s "$currentFilePath" -o "pdf/$currentFileName.pdf" \
                --template="pandoc/default.latex" \
                --lua-filter="pandoc/latex-fixes.lua" \
                --bibliography="pandoc/refs.bib" \
                --citeproc \
                --csl="pandoc/ieee.csl" \
                --variable numbersections=true \
                --variable title="$currentFileName" \
                -M reference-section-title=References \
                -M link-citations=true \
                --pdf-engine=pdflatex

              # Convert markdown to LaTeX and store in latex directory
              echo "Converting $currentFilePath to LaTeX..."
              pandoc -f markdown -s "$currentFilePath" -o "latex/$currentFileName.tex" \
                --template="pandoc/default.latex" \
                --lua-filter="pandoc/latex-fixes.lua" \
                --bibliography="refs.bib" \
                --biblatex \
                --variable numbersections=true \
                --variable title="$currentFileName" \
                -M reference-section-title=References \
                -M link-citations=true
            fi

            # Handle deletion of markdown file
            if [ "$status" = "D" ]; then
              # Delete the corresponding PDF and LaTeX files if they exist
              if [ -f "pdf/$currentFileName.pdf" ]; then
                echo "Deleting PDF: pdf/$currentFileName.pdf"
                git rm -f "pdf/$currentFileName.pdf"
              fi

              if [ -f "latex/$currentFileName.tex" ]; then
                echo "Deleting LaTeX: latex/$currentFileName.tex"
                git rm -f "latex/$currentFileName.tex"
              fi
            fi
            
          done < markdown_changes.txt

      - name: Commit PDF Changes
        run: |
          git config --global user.name "GitHub Actions"
          git config --global user.email "github-actions@github.com"
          git add "pdf/*.pdf" "latex/*.tex"  # Include both new and deleted files
          git commit -m "Added/Updated PDFs and LaTeX for modified markdown files, removed deleted files" || echo "No changes to commit"


      - name: Push All Changes
        run: |
          git push