GitHub: Add docker-publish-riscv64.yml for riscv64

To handle push/pull request concerning riscv64-related files.

Signed-off-by: Tan En De <[email protected]>

.github/workflows/docker-publish-riscv64.yml

@@ -0,0 +1,85 @@
+name: Docker
+
+on:
+  push:
+    branches: [ "main" ]
+    paths: [Dockerfile.riscv64, .github/workflows/docker-publish-riscv64.yml, build_container_riscv64*, riscv64/**]
+  pull_request:
+    branches: [ "main" ]
+    paths: [Dockerfile.riscv64, .github/workflows/docker-publish-riscv64.yml, build_container_riscv64*, riscv64/**]
+
+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/[email protected]
+      - name: Check install!
+        if: github.event_name != 'pull_request'
+        run: cosign version
+
+      # Workaround: https://github.com/docker/build-push-action/issues/461
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf
+
+      # 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@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        with:
+          username: ${{ secrets.DOCKER_ACCOUNT_ID }}
+          password: ${{ secrets.DOCKER_ACCESS_TOKEN }}
+
+      - name: Generate next docker tag
+        # NOTE: The tag contains the full docker container name + tag as it is requested
+        # by the build-and-push step.
+        env:
+          ARCH: riscv64
+        run: |
+          echo "VERSION=$(./docker.sh print-next-version)" >> $GITHUB_ENV
+      - name: Print next docker tag
+        run: |
+          echo "Next version to be published is: ${{ env.VERSION }}"
+
+      # 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@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
+        with:
+          context: .
+          file: Dockerfile.riscv64
+          push: ${{ github.event_name != 'pull_request' }}
+          platforms: linux/amd64
+          tags: ${{ env.VERSION }}
+          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: ${{ github.event_name != 'pull_request' }}
+        env:
+          COSIGN_EXPERIMENTAL: "true"
+        # This step uses the identity token to provision an ephemeral certificate
+        # against the sigstore community Fulcio instance.
+        run: echo "${{ steps.meta.outputs.tags }}" | xargs -I {} cosign sign {}@${{ steps.build-and-push.outputs.digest }}