chore(deps): bump webpack and backstage-cli

This change bumps the webpack version and backstage-cli versions, along
with the relevant changes needed to fix the build and tests.

Assisted-by: Cursor

Author: gashcrumb

package.json

@@ -37,7 +37,7 @@
   },
   "dependencies": {
     "@backstage/cli": "0.34.1",
-    "@backstage/cli-common": "^0.1.15",
+    "@backstage/cli-common": "^0.1.17",
     "@backstage/cli-node": "^0.2.12",
     "@backstage/config": "^1.3.2",
     "@backstage/config-loader": "^1.9.5",
@@ -80,7 +80,7 @@
     "style-loader": "^3.3.1",
     "swc-loader": "^0.2.3",
     "typescript-json-schema": "^0.64.0",
-    "webpack": "~5.96.0",
+    "webpack": "~5.104.1",
     "webpack-dev-server": "^5.0.0",
     "yaml": "^2.5.1",
     "yml-loader": "^2.1.0",

src/lib/bundler/LinkedPackageResolvePlugin.test.ts

@@ -14,13 +14,42 @@
  * limitations under the License.
  */
 
+import * as fs from 'fs';
 import * as os from 'os';
 import * as path from 'path';
 
 import { LinkedPackageResolvePlugin } from './LinkedPackageResolvePlugin';
 
 describe('LinkedPackageResolvePlugin', () => {
-  const root = os.platform() === 'win32' ? 'C:\\root' : '/root';
+  // Use a temp dir so isChildPath (realpathSync) can access paths; /root may be inaccessible (EACCES).
+  const root = path.join(
+    os.tmpdir(),
+    `linked-package-resolve-plugin-test-${Date.now()}`,
+  );
+
+  beforeAll(() => {
+    const dirs = [
+      path.join(root, 'external-a'),
+      path.join(root, 'external-a/src'),
+      path.join(root, 'external-b'),
+      path.join(root, 'external-b/src'),
+      path.join(root, 'external-aa'),
+      path.join(root, 'external-aa/src'),
+      path.join(root, 'repo/package/x/src'),
+      path.join(root, 'repo/node_modules'),
+    ];
+    for (const dir of dirs) {
+      fs.mkdirSync(dir, { recursive: true });
+    }
+  });
+
+  afterAll(() => {
+    try {
+      fs.rmSync(root, { recursive: true });
+    } catch {
+      // ignore cleanup errors
+    }
+  });
 
   it('should re-write paths for external packages', () => {
     const plugin = new LinkedPackageResolvePlugin(

src/lib/bundler/optimization.ts

@@ -33,7 +33,7 @@ export const optimization = (
         format: 'iife',
       }),
     ],
-    runtimeChunk: 'single',
+    runtimeChunk: { name: _ => 'runtime' },
     splitChunks: {
       automaticNameDelimiter: '-',
       cacheGroups: {