feat(nestjs): Duplicate SentryService behaviour into @sentry/nestjs SDK init()

packages/nestjs/src/sdk.ts

@@ -1,5 +1,10 @@
-import { applySdkMetadata } from '@sentry/core';
-import type { NodeClient, NodeOptions } from '@sentry/node';
+import {
+  SEMANTIC_ATTRIBUTE_SENTRY_OP,
+  SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN,
+  applySdkMetadata,
+  spanToJSON,
+} from '@sentry/core';
+import type { NodeClient, NodeOptions, Span } from '@sentry/node';
 import { init as nodeInit } from '@sentry/node';
 
 /**
@@ -12,5 +17,29 @@ export function init(options: NodeOptions | undefined = {}): NodeClient | undefi
 
   applySdkMetadata(opts, 'nestjs');
 
-  return nodeInit(opts);
+  const client = nodeInit(opts);
+
+  if (client) {
+    client.on('spanStart', span => {
+      // The NestInstrumentation has no requestHook, so we add NestJS-specific attributes here
+      addNestSpanAttributes(span);
+    });
+  }
+
+  return client;
+}
+
+function addNestSpanAttributes(span: Span): void {
+  const attributes = spanToJSON(span).data || {};
+
+  // this is one of: app_creation, request_context, handler
+  const type = attributes['nestjs.type'];
+
+  // Only set the NestJS attributes for spans that are created by the NestJS instrumentation and for spans that do not have an op already.
+  if (type && !attributes[SEMANTIC_ATTRIBUTE_SENTRY_OP]) {
+    span.setAttributes({
+      [SEMANTIC_ATTRIBUTE_SENTRY_ORIGIN]: 'auto.http.otel.nestjs',
+      [SEMANTIC_ATTRIBUTE_SENTRY_OP]: `${type}.nestjs`,
+    });
+  }
 }