Split into two workflows: build (push/PR/dispatch) and scheduled-update (daily version check)

.github/workflows/scheduled-update.yaml

@@ -0,0 +1,160 @@
+name: scheduled version check
+
+on:
+  schedule:
+    - cron: '0 6 * * *'
+
+env:
+  GHCR_REPO: ghcr.io/trent-maetzold/protonmail-bridge
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    outputs:
+      version: ${{ steps.check.outputs.version }}
+      build_needed: ${{ steps.check.outputs.build_needed }}
+    steps:
+      - name: Check for new upstream version
+        id: check
+        run: |
+          latest=$(curl -s https://api.github.com/repos/ProtonMail/proton-bridge/releases/latest | jq -r '.tag_name')
+          echo "Latest upstream: $latest"
+          echo "version=$latest" >> $GITHUB_OUTPUT
+
+          token=$(curl -s "https://ghcr.io/token?scope=repository:trent-maetzold/protonmail-bridge:pull" | jq -r '.token')
+          tags=$(curl -s -H "Authorization: Bearer $token" "https://ghcr.io/v2/trent-maetzold/protonmail-bridge/tags/list" | jq -r '.tags[]?' 2>/dev/null || echo "")
+
+          if echo "$tags" | grep -qx "${latest}-build"; then
+            echo "Version ${latest} already built"
+            echo "build_needed=false" >> $GITHUB_OUTPUT
+          else
+            echo "New version ${latest} detected"
+            echo "build_needed=true" >> $GITHUB_OUTPUT
+          fi
+
+  build:
+    needs: check
+    if: needs.check.outputs.build_needed == 'true'
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64/v8
+          - linux/arm/v7
+          - linux/riscv64
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.GHCR_REPO }}
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,"name=${{ env.GHCR_REPO }}",push-by-digest=true,name-canonical=true,push=true
+          context: ./build
+          file: ./build/Dockerfile
+          provenance: false
+          sbom: false
+          build-args: |
+            version=${{ needs.check.outputs.version }}
+
+      - name: Export digest
+        run: |
+          mkdir -p ${{ runner.temp }}/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "${{ runner.temp }}/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: ${{ runner.temp }}/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - check
+      - build
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: ${{ runner.temp }}/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Login to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          driver-opts: network=host
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.GHCR_REPO }}
+          tags: |
+            type=raw,enable=true,value=${{ needs.check.outputs.version }}-build
+            type=raw,enable=true,value=build
+            type=raw,enable=true,value=latest
+
+      - name: Create manifest list and push
+        working-directory: ${{ runner.temp }}/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.GHCR_REPO }}@sha256:%s ' *)
+
+      - name: Run Trivy vulnerability scan
+        uses: aquasecurity/trivy-action@0.30.0
+        with:
+          image-ref: "${{ env.GHCR_REPO }}:${{ needs.check.outputs.version }}-build"
+          format: 'sarif'
+          exit-code: 0
+          severity: 'CRITICAL,HIGH'
+          output: 'trivy-results.sarif'
+
+      - name: Upload Trivy scan SARIF report
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: 'trivy-results.sarif'
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.GHCR_REPO }}:${{ needs.check.outputs.version }}-build