name: build-latex
on: [ push, pull_request ]

jobs:
  build:
    runs-on: docker

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

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

      - name: install LaTeX
        run: |
          sudo apt-get update
          sudo apt-get install -y texlive-latex-base texlive-latex-recommended texlive-latex-extra texlive-fonts-recommended

      - name: compile LaTeX document
        run: |
          pdflatex -interaction=nonstopmode main.tex
          pdflatex -interaction=nonstopmode main.tex

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

      - name: cache LaTeX packages
        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