docker-image.yml

name: Push image
on:
  schedule:
    # Rebuild once a week
    - cron:  '0 0 * * 0'
  push:
    branches: [ main ]

  # Allow running this workflow manually from the Actions tab
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout image repo
        uses: actions/checkout@v3
      - name: Checkout upstream repo
        uses: actions/checkout@v3
        with:
          repository: mailhog/mailhog
          token: ${{ secrets.GITHUB_TOKEN }}
          path: upstream
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Create tags
        id: create-tag
        run: |
          GHCR_IMAGE=ghcr.io/${{ github.repository_owner }}/mailhog
          # Find latest tag
          VERSION="$(cd upstream && git describe --tags $(git rev-list --tags --max-count=1))"
          VERSION_DATE="$VERSION-$(date +'%Y-%m-%d')"
          TAGS="${GHCR_IMAGE}:latest,${GHCR_IMAGE}:${VERSION},${GHCR_IMAGE}:${VERSION_DATE}"
          echo "TAGS=${TAGS}" | tee -a $GITHUB_ENV
      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ env.TAGS }}
          labels: |
            org.opencontainers.image.authors=${{ github.repository_owner }}
            org.opencontainers.image.created=${{ env.BUILD_DATE }}
            org.opencontainers.image.description=Created from commit ${{ env.GIT_SHA }} and ref ${{ env.GIT_REF }}
            org.opencontainers.image.ref.name=${{ env.GIT_REF }}
            org.opencontainers.image.revision=${{ env.GIT_SHA }}
            org.opencontainers.image.source=https://github.com/${{ github.repository }}
            org.opencontainers.image.description=Created from commit ${{ env.GIT_SHA}} and ref ${{ env.GIT_REF }}