fix(rspack): handle potentially missing lockfile in @nx/rspack/plugin plugin (#30086)

## Current Behavior

If the lock file is missing the `@nx/rspack/plugin` plugin throws a
cryptic error.

## Expected Behavior

The `@nx/rspack/plugin` should handle a missing lock file.

## Related Issue(s)

Fixes #

packages/rspack/src/plugins/plugin.spec.ts

@@ -0,0 +1,47 @@
+import { type CreateNodesContext } from '@nx/devkit';
+import { isUsingTsSolutionSetup } from '@nx/js/src/utils/typescript/ts-solution-setup';
+import { TempFs } from 'nx/src/internal-testing-utils/temp-fs';
+import { createNodesV2 } from './plugin';
+
+jest.mock('@nx/js/src/utils/typescript/ts-solution-setup', () => ({
+  ...jest.requireActual('@nx/js/src/utils/typescript/ts-solution-setup'),
+  isUsingTsSolutionSetup: jest.fn(),
+}));
+
+describe('@nx/rspack', () => {
+  let createNodesFunction = createNodesV2[1];
+  let context: CreateNodesContext;
+  let tempFs: TempFs;
+
+  beforeEach(() => {
+    (isUsingTsSolutionSetup as jest.Mock).mockReturnValue(false);
+    tempFs = new TempFs('rspack-test');
+    context = {
+      configFiles: [],
+      nxJsonConfiguration: {
+        namedInputs: {
+          default: ['{projectRoot}/**/*'],
+          production: ['!{projectRoot}/**/*.spec.ts'],
+        },
+      },
+      workspaceRoot: tempFs.tempDir,
+    };
+
+    tempFs.createFileSync(
+      'my-app/project.json',
+      JSON.stringify({ name: 'my-app' })
+    );
+    tempFs.createFileSync('my-app/rspack.config.ts', `export default {};`);
+  });
+
+  afterEach(() => {
+    jest.resetModules();
+    tempFs.cleanup();
+  });
+
+  it('should handle missing lock file', async () => {
+    await expect(
+      createNodesFunction(['my-app/rspack.config.ts'], {}, context)
+    ).resolves.not.toThrow();
+  });
+});

packages/rspack/src/plugins/plugin.ts

@@ -107,20 +107,22 @@ async function createNodesInternal(
 
   const normalizedOptions = normalizeOptions(options);
 
-  // We do not want to alter how the hash is calculated, so appending the config file path to the hash
-  // to prevent vite/vitest files overwriting the target cache created by the other
-
-  const nodeHash = hashArray([
-    ...[
-      join(context.workspaceRoot, configFilePath),
+  const lockFileHash =
+    hashFile(
       join(
         context.workspaceRoot,
         getLockFileName(detectPackageManager(context.workspaceRoot))
-      ),
-    ].map(hashFile),
-    hashObject(options),
+      )
+    ) ?? '';
+
+  const nodeHash = hashArray([
+    hashFile(join(context.workspaceRoot, configFilePath)),
+    lockFileHash,
+    hashObject({ ...options, isTsSolutionSetup }),
     hashObject(packageJson),
   ]);
+  // We do not want to alter how the hash is calculated, so appending the config file path to the hash
+  // to prevent vite/vitest files overwriting the target cache created by the other
   const hash = `${nodeHash}_${configFilePath}`;
 
   targetsCache[hash] ??= await createRspackTargets(