name: build-latex

on:
  push:
  pull_request:
  workflow_dispatch:

jobs:
  build:
    runs-on: docker

    steps:
      - name: checkout repository
        uses: https://code.forgejo.org/actions/checkout@v4

      - name: restore cached apt lists
        uses: https://code.forgejo.org/actions/cache/restore@v4
        with:
          path: /var/lib/apt/lists
          key: ${{ runner.os }}-texlive-full

      - name: install full TeX Live
        run: |
          apt-get update
          apt-get install -y texlive-full

      - name: compile LaTeX document
        run: |
          pdflatex -interaction=nonstopmode main.tex || true
          pdflatex -interaction=nonstopmode main.tex || true
          if [ ! -f main.pdf ]; then
            echo "PDF was not generated."
            exit 1
          fi

      - name: capture PDF artifact
        uses: https://code.forgejo.org/forgejo/upload-artifact@v4
        with:
          name: main-pdf.zip
          path: main.pdf
          if-no-files-found: error

      - name: cache apt lists
        if: ${{ github.ref_name == github.event.repository.default_branch }}
        uses: https://code.forgejo.org/actions/cache/save@v4
        with:
          path: /var/lib/apt/lists
          key: ${{ runner.os }}-texlive-full