push.yml

# Build and publish the container and use it to render the PDF for pushes to main.
name: push

on:
  push:
    branches: [main]

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-container:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      # Login against a Docker registry
      # https://github.com/docker/login-action
      - name: Log into registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Set up QEMU for cross-platform builds below
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
        with:
          image: tonistiigi/binfmt:latest
          platforms: all

      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v3

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}

      # Build and push Docker image with Buildx
      # https://github.com/docker/build-push-action
      - name: Build and publish Docker image
        uses: docker/build-push-action@v5
        with:
          # Cache layers from the container repo.
          # Update the cache only on pushes to main.
          # This minimizes the amount of times we have to rebuild pandoc.
          cache-from: type=gha
          cache-to: ${{ github.event_name == 'push' && 'type=gha' || '' }}
          platforms: linux/amd64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}

  # Use the fresh container to render the samples.
  render-samples:
    needs: build-container
    uses: ./.github/workflows/render.yml
    with:
      container-version: latest
      input: guide.tcg
      workflow: push