Use path.resolve to resolve a path to next-server.js

labels.txt

@@ -0,0 +1,7 @@
+{
+  "status": 200,
+  "body": {
+    "message": "GET method called",
+    "store": "undefined"
+  }
+}

src/OpenAPM.ts

@@ -2,6 +2,7 @@ import * as os from 'os';
 import http from 'http';
 import ResponseTime from 'response-time';
 import promClient from 'prom-client';
+import path from 'path';
 
 import type {
   Counter,
@@ -435,7 +436,9 @@ export class OpenAPM extends LevitateEvents {
         instrumentNestFactory(NestFactory, this._REDMiddleware);
       }
       if (moduleName === 'nextjs') {
-        const nextServer = require('next/dist/src/server/next-server');
+        const nextServer = require(path.resolve(
+          'node_modules/next/dist/server/next-server.js'
+        ));
         instrumentNextjs(
           nextServer.default,
           {
@@ -448,6 +451,7 @@ export class OpenAPM extends LevitateEvents {
 
       return true;
     } catch (error) {
+      console.error('OpenAPM:', error);
       if (Object.keys(moduleNames).includes(moduleName)) {
         throw new Error(
           `OpenAPM couldn't import the ${moduleNames[moduleName]} package, please install it.`

tests/nextjs/nextjs.test.ts

@@ -75,7 +75,6 @@ describe('Next.js', () => {
   });
 
   test('Dynamic Labels are captured', async () => {
-    // writeFileSync('metrics.txt', JSON.stringify(parsedData, null, 2));
     const res = await makeRequest(expressApp, '/labels');
     writeFileSync('labels.txt', JSON.stringify(res.body, null, 2));
     expect(true).toBe(true);

tsup.config.ts

@@ -4,7 +4,7 @@ import glob from 'tiny-glob';
 export default defineConfig(async () => ({
   entry: await glob('src/**/*.ts'),
   sourcemap: false,
-  bundle: true,
+  bundle: false,
   format: ['cjs', 'esm'],
   legacyOutput: true,
   cjsInterop: true,