docker.yml

name: Publish Docker images

on:
  push:
  pull_request:
  schedule:
    # update images every month
    - cron: "1 1 12 * *"
  workflow_dispatch:

# You may need to go to Repo Settings > Actions > General > Workflow permissions and select Read and Write permissions
permissions:
  packages: write

jobs:
  docker:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        image:
          - cross-aarch64-unknown-linux-gnu
          - cross-armv7-unknown-linux-gnueabihf
    steps:
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository_owner }}/${{ matrix.image }}
          # https://github.com/docker/metadata-action
          tags: |
            type=schedule,pattern={{date 'YYYYMM'}}
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          file: ./docker/${{ matrix.image }}.dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}