build: publish docker image to ghcr

.github/dependabot.yml

@@ -0,0 +1,18 @@
+version: 2
+updates:
+  - package-ecosystem: gomod
+    directory: /
+    schedule:
+      interval: weekly
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+  - package-ecosystem: docker
+    directory: "/"
+    schedule:
+      interval: weekly
+  - package-ecosystem: docker
+    directory: "/docker-runner"
+    schedule:
+      interval: weekly

.github/workflows/docker-publish.yml

@@ -0,0 +1,131 @@
+# See also:
+# https://docs.docker.com/build/ci/github-actions/multi-platform/
+# https://docs.github.com/en/actions/publishing-packages/publishing-docker-images
+
+name: Publish Docker image
+
+on:
+  push:
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm/v6
+          - linux/arm/v7
+          - linux/arm64
+    steps:
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            - type=raw,value=latest,enable={{is_default_branch}}
+            - type=ref,event=branch
+            - type=ref,event=tag
+            - type=sha
+
+      - uses: docker/setup-qemu-action@v3
+      - uses: docker/setup-buildx-action@v3
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  publish:
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            - type=raw,value=latest,enable={{is_default_branch}}
+            - type=ref,event=branch
+            - type=ref,event=tag
+            - type=sha
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create manifest list and push
+        id: push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+      - name: Inspect image
+        id: inspect
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}
+          IMAGE_DIGEST=$(docker buildx imagetools inspect --format "{{json .Manifest}}" ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }} | jq -r '.digest')
+          echo "IMAGE_DIGEST=$IMAGE_DIGEST" >> $GITHUB_OUTPUT
+
+      - name: Generate artifact attestation
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+          subject-digest: ${{ steps.inspect.outputs.IMAGE_DIGEST }}
+          push-to-registry: true

docker-runner/Makefile

@@ -4,26 +4,15 @@ else
   EXECUTABLE_EXTENSION :=
 endif
 
-all: docker-runner.id
+all: service-base-image.id
 
 .PHONY: clean clean-all base-apt-update
 
 service-base-image.id: service-base.Dockerfile
 	docker build -t zgrab2_service_base:latest -f service-base.Dockerfile -q . > service-base-image.id || (rm -f service-base-image.id && exit 1)
 
-runner-base-image.id: runner-base.Dockerfile
-	docker build -t zgrab2_runner_base:latest -f runner-base.Dockerfile -q . > runner-base-image.id || (rm -f runner-base-image.id && exit 1)
-
 base-apt-update:
 	IMAGE_ID=zgrab2_service_base:latest ./base-apt-update.sh
-	IMAGE_ID=zgrab2_runner_base:latest ./base-apt-update.sh
-
-docker-runner.id: Dockerfile ../cmd/zgrab2/zgrab2$(EXECUTABLE_EXTENSION) runner-base-image.id service-base-image.id
-	docker build -t zgrab2_runner:latest -f Dockerfile -q .. > docker-runner.id || (rm -f docker-runner.id && exit 1)
 
-clean:
-	if [ -f docker-runner.id ]; then docker rmi -f $$(cat docker-runner.id) && rm -f docker-runner.id; fi
-
 clean-all: clean
 	if [ -f service-base-image.id ]; then docker rmi -f $$(cat service-base-image.id) && rm -f service-base-image.id; fi
-	if [ -f runner-base-image.id ]; then docker rmi -f $$(cat runner-base-image.id) && rm -f runner-base-image.id; fi