From b38e89f67155f2caeccb4cb6484c4a668519f719 Mon Sep 17 00:00:00 2001
From: s1gr1d <sigrid.huemer@posteo.at>
Date: Fri, 27 Jun 2025 12:28:34 +0200
Subject: [PATCH 1/2] fix(nuxt): Only add OTel alias in dev mode

---
 packages/nuxt/src/vite/utils.ts       |  8 +++++++-
 packages/nuxt/test/vite/utils.test.ts | 16 ++++++++++++++--
 2 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/packages/nuxt/src/vite/utils.ts b/packages/nuxt/src/vite/utils.ts
index 53d4e57d16e3..758ea657818a 100644
--- a/packages/nuxt/src/vite/utils.ts
+++ b/packages/nuxt/src/vite/utils.ts
@@ -191,9 +191,15 @@ export function constructFunctionReExport(pathWithQuery: string, entryId: string
  * @see https://nuxt.com/docs/guide/concepts/esm#aliasing-libraries
  */
 export function addOTelCommonJSImportAlias(nuxt: Nuxt): void {
+  if (nuxt.options.dev) {
+    return;
+  }
+
   if (!nuxt.options.alias) {
     nuxt.options.alias = {};
   }
 
-  nuxt.options.alias['@opentelemetry/resources'] = '@opentelemetry/resources/build/src/index.js';
+  if (!nuxt.options.alias['@opentelemetry/resources']) {
+    nuxt.options.alias['@opentelemetry/resources'] = '@opentelemetry/resources/build/src/index.js';
+  }
 }
diff --git a/packages/nuxt/test/vite/utils.test.ts b/packages/nuxt/test/vite/utils.test.ts
index 8bb77bc6e12b..c3aae0dade39 100644
--- a/packages/nuxt/test/vite/utils.test.ts
+++ b/packages/nuxt/test/vite/utils.test.ts
@@ -398,7 +398,7 @@ describe('addOTelCommonJSImportAlias', () => {
     });
   });
 
-  it('overwrites existing alias for @opentelemetry/resources if already present', () => {
+  it('does not override existing alias for @opentelemetry/resources', () => {
     const nuxtMock: Nuxt = {
       options: {
         alias: {
@@ -410,7 +410,19 @@ describe('addOTelCommonJSImportAlias', () => {
     addOTelCommonJSImportAlias(nuxtMock);
 
     expect(nuxtMock.options.alias).toEqual({
-      '@opentelemetry/resources': '@opentelemetry/resources/build/src/index.js',
+      '@opentelemetry/resources': 'some-other-path',
     });
   });
+
+  it('does not add alias in development mode', () => {
+    const nuxtMock: Nuxt = {
+      options: {
+        dev: true,
+      },
+    } as unknown as Nuxt;
+
+    addOTelCommonJSImportAlias(nuxtMock);
+
+    expect(nuxtMock.options.alias).toBeUndefined();
+  });
 });

From de91821711a89a4ca4e4290c564cdbf0d7973659 Mon Sep 17 00:00:00 2001
From: s1gr1d <sigrid.huemer@posteo.at>
Date: Fri, 27 Jun 2025 12:43:01 +0200
Subject: [PATCH 2/2] fix conditional

---
 packages/nuxt/src/vite/utils.ts       |  2 +-
 packages/nuxt/test/vite/utils.test.ts | 10 +++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/packages/nuxt/src/vite/utils.ts b/packages/nuxt/src/vite/utils.ts
index 758ea657818a..fc55ebf412c2 100644
--- a/packages/nuxt/src/vite/utils.ts
+++ b/packages/nuxt/src/vite/utils.ts
@@ -191,7 +191,7 @@ export function constructFunctionReExport(pathWithQuery: string, entryId: string
  * @see https://nuxt.com/docs/guide/concepts/esm#aliasing-libraries
  */
 export function addOTelCommonJSImportAlias(nuxt: Nuxt): void {
-  if (nuxt.options.dev) {
+  if (!nuxt.options.dev) {
     return;
   }
 
diff --git a/packages/nuxt/test/vite/utils.test.ts b/packages/nuxt/test/vite/utils.test.ts
index c3aae0dade39..6380d2d6a0c7 100644
--- a/packages/nuxt/test/vite/utils.test.ts
+++ b/packages/nuxt/test/vite/utils.test.ts
@@ -371,7 +371,7 @@ export { foo_sentryWrapped as foo };
 describe('addOTelCommonJSImportAlias', () => {
   it('adds alias for @opentelemetry/resources when options.alias does not exist', () => {
     const nuxtMock: Nuxt = {
-      options: {},
+      options: { dev: true },
     } as unknown as Nuxt;
 
     addOTelCommonJSImportAlias(nuxtMock);
@@ -384,6 +384,7 @@ describe('addOTelCommonJSImportAlias', () => {
   it('adds alias for @opentelemetry/resources when options.alias already exists', () => {
     const nuxtMock: Nuxt = {
       options: {
+        dev: true,
         alias: {
           'existing-alias': 'some-path',
         },
@@ -401,6 +402,7 @@ describe('addOTelCommonJSImportAlias', () => {
   it('does not override existing alias for @opentelemetry/resources', () => {
     const nuxtMock: Nuxt = {
       options: {
+        dev: true,
         alias: {
           '@opentelemetry/resources': 'some-other-path',
         },
@@ -414,11 +416,9 @@ describe('addOTelCommonJSImportAlias', () => {
     });
   });
 
-  it('does not add alias in development mode', () => {
+  it('does not add alias when not development mode', () => {
     const nuxtMock: Nuxt = {
-      options: {
-        dev: true,
-      },
+      options: {},
     } as unknown as Nuxt;
 
     addOTelCommonJSImportAlias(nuxtMock);