RTFD (Read The F*****g Docs)

name: Docker Publish on: push: branches: [ "main" ] # Publish semver tags as releases. tags: [ 'v*.*.*' ] pull_request: branches: [ "main" ] release: types: [published] workflow_dispatch: 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@v4 # 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@v3.5.0 with: cosign-release: 'v2.2.4' # Set up QEMU for multi-arch builds - name: Set up QEMU uses: docker/setup-qemu-action@v3 # Set up Buildx runner automation (see: https://github.com/docker/build-push-action) - name: Set up Docker 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 }} tags: | type=edge,branch=main type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/') }} type=semver,pattern={{version}} type=semver,pattern={{major}}.{{minor}} # 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@v5 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}