From 1b30c954eb3cfbac8968a2ee2d0ca5472ba6f202 Mon Sep 17 00:00:00 2001
From: Katie Byers <lobsterkatie@gmail.com>
Date: Tue, 26 Oct 2021 12:00:33 -0700
Subject: [PATCH] tag backend events when running on vercel

---
 packages/nextjs/src/index.server.ts       |  3 +++
 packages/nextjs/test/index.server.test.ts | 24 +++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/packages/nextjs/src/index.server.ts b/packages/nextjs/src/index.server.ts
index 2ed6ce1ec0fc..0c7e19690877 100644
--- a/packages/nextjs/src/index.server.ts
+++ b/packages/nextjs/src/index.server.ts
@@ -53,6 +53,9 @@ export function init(options: NextjsOptions): void {
 
   configureScope(scope => {
     scope.setTag('runtime', 'node');
+    if (process.env.VERCEL) {
+      scope.setTag('vercel', true);
+    }
   });
 
   if (activeDomain) {
diff --git a/packages/nextjs/test/index.server.test.ts b/packages/nextjs/test/index.server.test.ts
index 43b597b4c435..337e70345c52 100644
--- a/packages/nextjs/test/index.server.test.ts
+++ b/packages/nextjs/test/index.server.test.ts
@@ -63,6 +63,30 @@ describe('Server init()', () => {
     expect(currentScope._tags).toEqual({ runtime: 'node' });
   });
 
+  it('applies `vercel` tag when running on vercel', () => {
+    const currentScope = getCurrentHub().getScope();
+
+    process.env.VERCEL = '1';
+
+    init({});
+
+    // @ts-ignore need access to protected _tags attribute
+    expect(currentScope._tags.vercel).toEqual(true);
+
+    delete process.env.VERCEL;
+  });
+
+  it('does not apply `vercel` tag when not running on vercel', () => {
+    const currentScope = getCurrentHub().getScope();
+
+    expect(process.env.VERCEL).toBeUndefined();
+
+    init({});
+
+    // @ts-ignore need access to protected _tags attribute
+    expect(currentScope._tags.vercel).toBeUndefined();
+  });
+
   it("initializes both global hub and domain hub when there's an active domain", () => {
     const globalHub = getCurrentHub();
     const local = domain.create();