drip/.github/workflows/docker.yml

name: Docker

on:
  push:
    tags: [ "v*.*.*" ]

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

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

    steps:
      - name: Checkout repository
        uses: actions/checkout@v5

      - name: Install cosign
        if: github.event_name != 'pull_request'
        uses: sigstore/cosign-installer@v4.0.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log into registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v5
        with:
          context: .
          file: deployments/Dockerfile.release
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: linux/amd64,linux/arm64
          build-args: |
            VERSION=${{ env.VERSION }}
          provenance: false

      - name: Sign the published Docker image
        if: github.event_name != 'pull_request'
        env:
          TAGS: ${{ steps.meta.outputs.tags }}
          DIGEST: ${{ steps.build-and-push.outputs.digest }}
        run: echo "${TAGS}" | tr ',' '\n' | xargs -I {} cosign sign --yes {}@${DIGEST}