Update .github/workflows/docker-publish.yml

.github/workflows/docker-publish.yml

@@ -1,112 +1,101 @@
-name: Build & push Docker image
+name: Docker
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
 on:
-  workflow_dispatch:
+  schedule:
-  workflow_call:
+    - cron: '25 11 * * *'
-    outputs:
+  push:
-      image:
+    branches: [ "main" ]
-        value: ${{ jobs.publish-manifest-list.outputs.image }}
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ "main" ]
+
 env:
-  DOCKER_REGISTRY: ghcr.io
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   build:
-    name: Build Docker image
+
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
-    strategy:
+      # This is used to complete the identity challenge
-      matrix:
+      # with sigstore/fulcio when running outside of PRs.
-        platform:
+      id-token: write
-          - linux/amd64
+
-          - linux/arm64
     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@59acb6260d9c0ba8f4a2f9d9b48431a222b68e20 #v3.5.0
+        with:
+          cosign-release: 'v2.2.4'
+
+      # 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 }}
+
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
-        with:
+
-          platforms: ${{ matrix.platform }}
+      # Build and push Docker image with Buildx (don't push on PR)
-      - name: Set up Docker Buildx
+      # https://github.com/docker/build-push-action
-        uses: docker/setup-buildx-action@v3
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.DOCKER_REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Prepare Docker image name
-        id: docker-image-name
-        env:
-          REPOSITORY: ${{ github.repository }}
-        run: echo "value=${DOCKER_REGISTRY}/${REPOSITORY,,}" >> $GITHUB_OUTPUT
       - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+        id: build-and-push
-        id: build-and-push-docker-image
+        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
         with:
           context: .
-          platforms: ${{ matrix.platform }}
+          push: ${{ github.event_name != 'pull_request' }}
-          outputs: type=registry,name=${{ steps.docker-image-name.outputs.value }},push-by-digest=true
+          tags: ${{ steps.meta.outputs.tags }}
-          cache-from: type=gha,scope=buildkit-${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
-          cache-to: type=gha,mode=max,scope=buildkit-${{ matrix.platform }}
+          platforms: linux/amd64,linux/arm64
-      - name: Export digest
+          cache-from: type=gha
-        run: |
+          cache-to: type=gha,mode=max
-          mkdir -p /tmp/digests
+
-          digest="${{ steps.build-and-push-docker-image.outputs.digest }}"
+      # Sign the resulting Docker image digest except on PRs.
-          touch "/tmp/digests/${digest#sha256:}"
+      # This will only write to the public Rekor transparency log when the Docker
-      - name: Upload digest
+      # repository is public to avoid leaking data.  If you would like to publish
-        uses: actions/upload-artifact@v3
+      # transparency data even for private images, pass --force to cosign below.
-        with:
+      # https://github.com/sigstore/cosign
-          name: digests
+      - name: Sign the published Docker image
-          path: /tmp/digests/*
+        if: ${{ github.event_name != 'pull_request' }}
-          if-no-files-found: error
-          retention-days: 1
-  publish-manifest-list:
-    name: Publish Docker manifest list
-    runs-on: ubuntu-latest
-    permissions:
-      packages: write
-    needs:
-      - build
-    outputs:
-      image: ${{ steps.retrieve-image.outputs.value }}
-    steps:
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.DOCKER_REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Prepare Docker metadata
-        uses: docker/metadata-action@v5
-        id: docker-metadata
-        with:
-          images: ${{ env.DOCKER_REGISTRY }}/${{ github.repository }}
-          tags: |
-            type=ref,event=branch
-            type=ref,event=pr
-            type=sha
-          flavor: |
-            latest=true
-      - name: Download digests
-        uses: actions/download-artifact@v3
-        with:
-          name: digests
-          path: /tmp/digests
-      - name: Prepare Docker image name
-        id: docker-image-name
         env:
-          REPOSITORY: ${{ github.repository }}
+          # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
-        run: echo "value=${DOCKER_REGISTRY}/${REPOSITORY,,}" >> $GITHUB_OUTPUT
+          TAGS: ${{ steps.meta.outputs.tags }}
-      - name: Create and push manifest list
+          DIGEST: ${{ steps.build-and-push.outputs.digest }}
-        run: |
+        # This step uses the identity token to provision an ephemeral certificate
-          docker buildx imagetools create \
+        # against the sigstore community Fulcio instance.
-            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
-            $(printf '${{ steps.docker-image-name.outputs.value }}@sha256:%s ' $(ls /tmp/digests)) \
-      - name: Retrieve image
-        id: retrieve-image
-        run: echo "value=$(echo "$DOCKER_METADATA_OUTPUT_JSON" | jq -r '.tags[1]')" >> $GITHUB_OUTPUT
-      - name: Inspect image
-        run: |
-          docker buildx imagetools inspect ${{ steps.retrieve-image.outputs.value }}