chore(spanner-driver): add auto-sync workflow and script to embed go-sql-spanner/spannerlib-node in spanner-driver

.github/workflows/sync-spannerlib-node.yml

@@ -0,0 +1,35 @@
+name: Sync SpannerLib Node code from go-sql-spanner
+
+permissions:
+  contents: read
+
+on:
+  pull_request:
+  workflow_dispatch: # Allows manual triggering
+
+jobs:
+  sync-code:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        with:
+          persist-credentials: false
+
+      - name: Copy SpannerLib code
+        run: ./scripts/sync_spannerlib_node.sh false main
+        working-directory: handwritten/spanner-driver
+        shell: bash
+
+      - uses: googleapis/code-suggester@f9fef85aa02459e30e62526abe950341cbbd768b # v5
+        env:
+          ACCESS_TOKEN: ${{ secrets.YOSHI_CODE_BOT_TOKEN }}
+        with:
+          command: pr
+          upstream_owner: googleapis
+          upstream_repo: google-cloud-node
+          description: 'Update the Spanner Node.js driver with the latest spannerlib-node code from go-sql-spanner.'
+          title: 'chore(spanner-driver): sync spannerlib-node code'
+          message: 'chore(spanner-driver): sync spannerlib-node code'
+          branch: automated-spanner-lib-code-update
+          git_dir: '.'
+          force: true

handwritten/spanner-driver/scripts/sync_spannerlib_node.sh

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+#!/bin/bash
+# Copyright 2026 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -e
+
+SKIP_CLONE=$1
+SPANNER_LIB_BRANCH="${2:-main}"
+
+if ! [ "$SKIP_CLONE" == "true" ]; then
+  git clone https://github.com/googleapis/go-sql-spanner.git --branch "$SPANNER_LIB_BRANCH"
+fi
+
+mkdir -p spannerlib-node
+rm -rf spannerlib-node/*
+
+cp -r go-sql-spanner/spannerlib/wrappers/spannerlib-node/* spannerlib-node/
+mkdir -p spannerlib-node/shared
+cp -r go-sql-spanner/spannerlib/shared/* spannerlib-node/shared/
+
+# Update build-shared-lib.sh and binding.gyp paths for self-contained spannerlib-node
+if [ -f "spannerlib-node/scripts/build-shared-lib.sh" ]; then
+  sed -i '' 's|\.\./\.\./\.\./shared|\.\./shared|g' spannerlib-node/scripts/build-shared-lib.sh 2>/dev/null || \
+  sed -i 's|\.\./\.\./\.\./shared|\.\./shared|g' spannerlib-node/scripts/build-shared-lib.sh
+fi
+
+if [ -f "spannerlib-node/binding.gyp" ]; then
+  sed -i '' 's|\.\./\.\./shared|\./shared|g' spannerlib-node/binding.gyp 2>/dev/null || \
+  sed -i 's|\.\./\.\./shared|\./shared|g' spannerlib-node/binding.gyp
+fi
+
+rm -rf go-sql-spanner