tex-pdf.yml

# add .tex conversion and (and .pdf rendering of .tex file) to a pull request that adds/modifies a cgel tree.
# currently assumes cgel file(s) in datasets/oneoff.

name: Create tree .tex and .pdf 

on:
  push:
    paths:
      - datasets/oneoff/*.cgel
    branches-ignore:
      - main      

jobs:

  render:
    runs-on: ubuntu-latest

    permissions:
      contents: write
    
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.ref }}
          submodules: true
          fetch-depth: 0

      - name: Update to make sure we have a newly created branch
        run: |
          git branch -v
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      # https://github.com/trilom/file-changes-action/issues/116#issuecomment-790007782
      - name: Get changed files
        run: |
            # check to see if there's a previous commit on the branch
            # if not, then diff with origin/main
            # if yes, then diff with the HEAD @ prevous commit
            if [[ "${{ github.event.before }}" == "0000000000000000000000000000000000000000" ]] ; then
              git fetch --depth=1 origin main
              export DIFF=$( git diff --name-only origin/main ${{ github.sha }} )
              echo "Diff between origin/main and ${{ github.sha }} "
            else
              export DIFF=$( git diff --name-only ${{ github.event.before }} ${{ github.sha }} )
              echo "Diff between ${{ github.event.before }} and ${{ github.sha }} "
            fi
            echo "DIFF_FILES=$(echo $DIFF | tr '\n' ' ')" >> $GITHUB_ENV
          
      - name: Config github actions bot
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Python 3.10
        uses: actions/setup-python@v3
        with:
          python-version: "3.10"

      - name: Install cgel dependencies
        run: |
          python -m pip install --upgrade pip
          pip install -r cgel/requirements.txt

      - name: Install texlive
        run: sudo apt-get install texlive-latex-extra
          
      - name: Generate .tex and .pdf files
        run: |
          mkdir -p datasets/oneoff/tex
          mkdir -p datasets/oneoff/pdf
          for changed_file in ${DIFF_FILES}; do
            if [[ "$changed_file" == **.cgel ]]; then
              filename=$(basename "$changed_file")
              tree_name="${filename%.cgel}"
              # make .tex
              python cgel/tree2tex.py "${changed_file}" > "datasets/oneoff/tex/$tree_name.tex"
              # make .pdf 
              pdflatex -output-directory=datasets/oneoff/pdf "datasets/oneoff/tex/$tree_name.tex"
            fi
          done   

      - name: Commit and push .tex and .pdf files 
        run: |
          for changed_file in ${DIFF_FILES}; do
            if [[ "$changed_file" == **.cgel ]]; then
              filename=$(basename "$changed_file")
              tree_name="${filename%.cgel}"
              git add "datasets/oneoff/tex/$tree_name.tex"
              git add "datasets/oneoff/pdf/$tree_name.pdf"
              git commit -m "generated tex and pdf files for $filename"
            fi
          done   
          git push
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}