fix(workflow): fix snmp_driver workflow

.github/workflows/snmp_driver.yml

@@ -1,66 +1,93 @@
-name: Build SNMP Driver
+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:
   push:
-    paths:
-      - 'grpc/'
-      - 'protos/'
-      - 'snmp/'
-      - 'CMakeLists.txt'
-      - 'main.cc'
     branches: [ "main" ]
   pull_request:
-    paths:
-      - 'grpc/'
-      - 'protos/'
-      - 'snmp/'
-      - 'CMakeLists.txt'
-      - 'main.cc'
     branches: [ "main" ]
 
-
 env:
+  # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io
-  IMAGE_NAME: y4cer/snmp_driver_generator
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
 
 jobs:
   build:
 
-    name: 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 code
+      - 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@f3c664df7af409cb4873aa5068053ba9d61a57b6 #v2.6.0
+        with:
+          cosign-release: 'v1.13.1'
+
+
+      # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf
 
-      - name: Log in to the Registry ${{ env.REGISTRY }}
+      # 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:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract Docker Metadata
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
         id: meta
         uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
         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@v4
+        uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
         with:
           context: .
           file: ./Dockerfile
           push: ${{ github.event_name != 'pull_request' }}
-          tags: ghcr.io/${{ env.IMAGE_NAME }}:latest
+          tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
-          cache-to: type=gha, mode=max
+          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 }}

Dockerfile

@@ -1,7 +1,6 @@
 FROM ubuntu:20.04
 
 ARG GPRC_VERSION=1.56.0
-ARG NUM_JOBS=12
 
 ENV DEBIAN_FRONTEND noninteractive
 
@@ -33,7 +32,9 @@ RUN cd /tmp && \
 
 RUN ls && pwd
 
-RUN cd /tmp/grpc && \
+RUN export NUM_JOBS=$([ $(uname) = 'Linux' ] && \
+                   lscpu -p | egrep -v '^#' | wc -l) \
+    cd /tmp/grpc && \
     mkdir -p cmake/build && \
     cd cmake/build && \
     cmake -DgRPC_INSTALL=ON \