+name: Docker
+
+on:
+ push:
+ tags:
+ - '*'
+
+env:
+ # Use docker.io for Docker Hub if empty
+ REGISTRY: ghcr.io
+ # github.repository as <account>/<repo>
+ IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+ build:
+
+ runs-on: ubuntu-latest
+ permissions:
+ contents: read
+ packages: write
+ # This is used to complete the identity challenge
+ # with sigstore/fulcio when running outside of PRs.
+ id-token: write
+
+ steps:
+ - name: Checkout repository
+ uses: actions/checkout@v3
+
+ # Install the cosign tool except on PR
+ # https://github.com/sigstore/cosign-installer
+ - name: Install cosign
+ if: github.event_name != 'pull_request'
+ uses: sigstore/cosign-installer@e1523de7571e31dbe865fd2e80c5c7c23ae71eb4 #v3.4.0
+ with:
+ cosign-release: 'v2.2.3'
+
+ # Set up BuildKit Docker container builder to be able to build
+ # multi-platform images and export cache
+ # https://github.com/docker/setup-buildx-action
+ - name: Set up Docker Buildx
+ uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
+
+ # 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@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
+ 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@96383f45573cb7f253c731d3b3ab81c87ef81934 # v5.0.0
+ with:
+ images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+ # 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
+ id: build-and-push
+ uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
+ with:
+ context: .
+ platforms: linux/amd64,linux/arm64
+ 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
+
+ # Sign the resulting Docker image digest except on PRs.
+ # This will only write to the public Rekor transparency log when the Docker
+ # repository is public to avoid leaking data. If you would like to publish
+ # transparency data even for private images, pass --force to cosign below.
+ # https://github.com/sigstore/cosign
+ - name: Sign the published Docker image
+ if: ${{ github.event_name != 'pull_request' }}
+ env:
+ # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
+ TAGS: ${{ steps.meta.outputs.tags }}
+ DIGEST: ${{ steps.build-and-push.outputs.digest }}
+ # This step uses the identity token to provision an ephemeral certificate
+ # against the sigstore community Fulcio instance.
+ run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}