feat(nextjs): Emit warning when using turbopack (#13566)

Ref: #8105

Emit a warning about certain incompatibilities when we detect a
turbopack build (dev or prod build).

Author: lforst

packages/nextjs/src/config/withSentryConfig.ts

@@ -103,6 +103,17 @@ function getFinalConfigObject(
     );
   }
 
+  if (process.env.TURBOPACK && !process.env.SENTRY_SUPPRESS_TURBOPACK_WARNING) {
+    // eslint-disable-next-line no-console
+    console.warn(
+      `[@sentry/nextjs] WARNING: You are using the Sentry SDK with \`next ${
+        process.env.NODE_ENV === 'development' ? 'dev' : 'build'
+      } --turbo\`. The Sentry SDK doesn't yet fully support Turbopack. The SDK will not be loaded in the browser, and serverside instrumentation will be inaccurate or incomplete. ${
+        process.env.NODE_ENV === 'development' ? 'Production builds without `--turbo` will still fully work. ' : ''
+      }If you are just trying out Sentry or attempting to configure the SDK, we recommend temporarily removing the \`--turbo\` flag while you are developing locally. Follow this issue for progress on Sentry + Turbopack: https://github.com/getsentry/sentry-javascript/issues/8105. (You can suppress this warning by setting SENTRY_SUPPRESS_TURBOPACK_WARNING=1 as environment variable)`,
+    );
+  }
+
   return {
     ...incomingUserNextConfigObject,
     webpack: constructWebpackConfigFunction(incomingUserNextConfigObject, userSentryOptions),