ci: Add blacksmith build step and cache restore (#19563)

.actrc

@@ -2,4 +2,4 @@
 -P blacksmith-4vcpu-ubuntu-2204=ubuntu-latest
 -P ubuntu-22.04=ubuntu-latest
 -P ubuntu-20.04=ubuntu-latest
---container-architecture linux/amd64
+--container-architecture linux/amd64

.github/actionlint.yaml

@@ -2,3 +2,5 @@ self-hosted-runner:
   labels:
     - blacksmith-2vcpu-ubuntu-2204
     - blacksmith-4vcpu-ubuntu-2204
+    - blacksmith-2vcpu-ubuntu-2204-arm
+    - blacksmith-4vcpu-ubuntu-2204-arm

.github/workflows/docker-build-push.yml

@@ -556,7 +556,7 @@ jobs:
 
   security-scan:
     name: Security Scan
-    needs: [determine-build-context, build-and-push-docker]
+    needs: [determine-build-context, build-and-push-docker, create_multi_arch_manifest]
     if: |
       success() &&
       (needs.determine-build-context.outputs.release_type == 'stable' ||

.github/workflows/release-publish.yml

@@ -7,11 +7,45 @@ on:
     branches:
       - 'release/*'
 
+env:
+  BUILD_CACHE_KEY: ${{ github.sha }}-release:build
+
 jobs:
+  build-amd64:
+    runs-on: blacksmith-4vcpu-ubuntu-2204
+    if: github.event.pull_request.merged == true
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+
+      - name: Setup Environment
+        uses: ./.github/actions/setup-nodejs-blacksmith
+
+      - name: Cache to GH
+        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        with:
+          path: ./packages/**/dist
+          key: ${{ env.BUILD_CACHE_KEY }}
+
+  build-arm64:
+    runs-on: blacksmith-4vcpu-ubuntu-2204-arm
+    if: github.event.pull_request.merged == true
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+      - name: Setup and Build ARM64
+        uses: ./.github/actions/setup-nodejs-blacksmith
+
   publish-to-npm:
     name: Publish to NPM
+    needs: build-amd64
     runs-on: ubuntu-latest
-    if: github.event.pull_request.merged == true
     timeout-minutes: 15
     permissions:
       id-token: write
@@ -39,14 +73,12 @@ jobs:
       - name: Set release version in env
         run: echo "RELEASE=$(node -e 'console.log(require("./package.json").version)')" >> "$GITHUB_ENV"
 
-      - name: Build
-        run: pnpm build
-
-      - name: Cache build artifacts
-        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+      - name: Restore build artifacts
+        uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
         with:
+          fail-on-cache-miss: true
           path: ./packages/**/dist
-          key: ${{ github.sha }}-release:build
+          key: ${{ env.BUILD_CACHE_KEY }}
 
       - name: Dry-run publishing
         run: pnpm publish -r --no-git-checks --dry-run
@@ -71,7 +103,7 @@ jobs:
 
   publish-to-docker-hub:
     name: Publish to DockerHub
-    needs: [publish-to-npm]
+    needs: [publish-to-npm, build-arm64]
     uses: ./.github/workflows/docker-build-push.yml
     with:
       n8n_version: ${{ needs.publish-to-npm.outputs.release }}
@@ -115,7 +147,7 @@ jobs:
         uses: actions/cache/restore@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
         with:
           path: ./packages/**/dist
-          key: ${{ github.sha }}-release:build
+          key: ${{ env.BUILD_CACHE_KEY }}
 
       - name: Create a frontend release
         uses: getsentry/action-release@e769183448303de84c5a06aaaddf9da7be26d6c7 # v1.7.0