chore: enable GitHub workflow for Metadata updater

.github/workflows/analytics-metadata-updater.yml

@@ -0,0 +1,54 @@
+name: CDK Analytics Metadata Updater
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - yuanhaoz/metadata_workflow # TODO, remove this
+      - v2-release
+
+jobs:
+  update-analytics-metadata:
+    if: github.repository == 'aws/aws-cdk'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.ref }}
+
+      - name: Set up Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "*"
+        env:
+          NODE_OPTIONS: "--max-old-space-size=8196 --experimental-worker ${NODE_OPTIONS:-}"
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile && cd tools/@aws-cdk/construct-metadata-updater && yarn build+test
+
+      - name: Invoke Analytics Metadata Updater
+        run: |
+          cd tools/@aws-cdk/construct-metadata-updater
+          ./bin/update-construct-metadata
+
+      - name: Check for changes
+        id: git-check
+        run: |
+          if [[ -n "$(git status --porcelain)" ]]; then
+            echo "changes=true" >> $GITHUB_OUTPUT
+          else
+            echo "changes=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Commit & Push changes
+        if: steps.git-check.outputs.changes == 'true'
+        run: |
+          git config --global user.name 'aws-cdk-automation'
+          git config --global user.email '[email protected]'
+          git add .
+          git commit -m "chore: update analytics metadata blueprints"
+          git push origin ${{ github.event.pull_request.head.ref }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

tools/@aws-cdk/construct-metadata-updater/lib/metadata-updater.ts

@@ -160,12 +160,22 @@ export class ConstructsUpdater extends MetadataUpdater {
       return;
     }
 
-    // Create the new import statement
-    sourceFile.addImportDeclaration({
+    // Find the correct insertion point (after the last import before the new one)
+    const importDeclarations = sourceFile.getImportDeclarations();
+    let insertIndex = importDeclarations.length;
+    for (let i = 0; i < importDeclarations.length; i++) {
+      const existingImport = importDeclarations[i].getModuleSpecifier().getText();
+      if (existingImport.localeCompare(relativePath) > 0) {
+        insertIndex = i;
+        break;
+      }
+    }
+
+    // Insert the new import at the appropriate position
+    sourceFile.insertImportDeclaration(insertIndex, {
       moduleSpecifier: relativePath,
       namedImports: [{ name: "addConstructMetadata" }],
     });
-
     console.log(`Added import for MetadataType in file: ${filePath} with relative path: ${relativePath}`);
 
     // Write the updated file back to disk