name: Build slides

on:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  build:
    runs-on: self-hosted
    container:
      image: node:20-bookworm-slim
      volumes:
        - /srv/slides/html:/output
    env:
      OUTPUT_DIR: /output
    steps:
      - name: Install build dependencies
        run: |
          set -e
          apt-get update -qq
          apt-get install -y --no-install-recommends git python3 ca-certificates
          npm install -g @marp-team/marp-cli

      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Build slides into /output
        run: bash build-slides.sh