docker-publish.yml

name: Docker

# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.

on:
  schedule:
    # Run image build on the first of every month
    - cron: '0 0 1 * *'
  push:
    # Publish tags which look like dates followed by a number as releases.
    tags: ['2[0-9][0-9][0-9]-[0-1][0-9]-[0-3][0-9].[0-9]+']
    branches: ['master']
  pull_request:
    branches: ['master']
  workflow_dispatch:

env:
  # Defaults to docker.io (Docker Hub) if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}


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

    strategy:
      fail-fast: false
      matrix:
        context: ['docker-c8', 'docker-c9']
        # Define platform for images
        include:
          - context: docker-c8
            platform: linux/amd64,linux/arm64
          - context: docker-c9
            platform: linux/amd64,linux/arm64

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

      # https://github.com/docker/setup-qemu-action
      # Setup QEMU environment to build multiarch images
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      # https://github.com/docker/setup-buildx-action
      # Build multiarch images with buildx
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v3

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}/${{ matrix.context }}

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          provenance: false
          context: ${{ matrix.context }}
          platforms: ${{ matrix.platform }}
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}