feat(vue): Register a route provider backed by the Vue router matcher

packages/vue/src/browserTracingIntegration.ts

@@ -3,7 +3,8 @@ import {
   startBrowserTracingNavigationSpan,
 } from '@sentry/browser';
 import type { Integration, StartSpanOptions } from '@sentry/core';
-import { instrumentVueRouter } from './router';
+import { setRouteProvider } from '@sentry/core';
+import { createVueRouteProvider, instrumentVueRouter } from './router';
 
 // The following type is an intersection of the Route type from VueRouter v2, v3, and v4.
 // This is not great, but kinda necessary to make it work with all versions at the same time.
@@ -61,6 +62,13 @@ export function browserTracingIntegration(options: VueBrowserTracingIntegrationO
 
   return {
     ...integration,
+    setup(client) {
+      // Registered before `afterAllSetup` so the provider is in place by the time the pageload span
+      // is named, rather than only once the router reports its first navigation.
+      setRouteProvider(createVueRouteProvider(router, routeLabel), client);
+
+      integration.setup?.(client);
+    },
     afterAllSetup(client) {
       integration.afterAllSetup(client);
 

packages/vue/src/router.ts

@@ -6,8 +6,9 @@ import {
   URL_PATH_PARAMETER_KEY_BASE,
   URL_TEMPLATE,
 } from '@sentry/conventions/attributes';
-import type { Span, SpanAttributes, StartSpanOptions, TransactionSource } from '@sentry/core';
+import type { RouteProvider, Span, SpanAttributes, StartSpanOptions, TransactionSource } from '@sentry/core';
 import {
+  createUrlRouteProvider,
   getActiveSpan,
   getClient,
   getCurrentScope,
@@ -45,6 +46,45 @@ interface VueRouter {
   // Vue Router 3 exposes a `mode` property ('hash' | 'history' | 'abstract').
   // Vue Router 4+ replaced it with `options.history`. Used for version detection.
   mode?: string;
+  // Vue Router 3 resolves to `{ route }`, Vue Router 4+ returns the route itself. Optional because
+  // this interface is hand-rolled across Vue Router 2, 3 and 4+ rather than taken from the library.
+  resolve?: (to: string) => Route | { route: Route };
+}
+
+/**
+ * Builds a route provider backed by the Vue router's own matcher.
+ *
+ * Labels routes the same way the navigation instrumentation does, so a route resolved here can't
+ * disagree with the one on the pageload or navigation span.
+ */
+export function createVueRouteProvider(router: VueRouter, routeLabel: 'name' | 'path'): RouteProvider {
+  return createUrlRouteProvider(url => {
+    const resolved = router.resolve?.(`${url.pathname}${url.search}${url.hash}`);
+    if (!resolved) {
+      return undefined;
+    }
+
+    const route = 'matched' in resolved ? resolved : resolved.route;
+
+    return getRouteLabel(route, routeLabel)?.name;
+  });
+}
+
+/**
+ * The label for a matched route and where it came from, or `undefined` when nothing matched and only
+ * the raw path is left.
+ */
+function getRouteLabel(
+  route: Route,
+  routeLabel: 'name' | 'path',
+): { name: string; source: TransactionSource } | undefined {
+  if (route.name && routeLabel !== 'path') {
+    return { name: route.name.toString(), source: 'custom' };
+  }
+
+  const matchedPath = route.matched[route.matched.length - 1]?.path;
+
+  return matchedPath ? { name: matchedPath, source: 'route' } : undefined;
 }
 
 /**
@@ -94,17 +134,9 @@ export function instrumentVueRouter(
     }
 
     // Determine a name for the routing transaction and where that name came from
-    let spanName: string = to.path;
-    let transactionSource: TransactionSource = 'url';
-    if (to.name && options.routeLabel !== 'path') {
-      spanName = to.name.toString();
-      transactionSource = 'custom';
-    } else if (to.matched.length > 0) {
-      const lastIndex = to.matched.length - 1;
-      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-      spanName = to.matched[lastIndex]!.path;
-      transactionSource = 'route';
-    }
+    const routeLabel = getRouteLabel(to, options.routeLabel);
+    const spanName = routeLabel?.name ?? to.path;
+    const transactionSource: TransactionSource = routeLabel?.source ?? 'url';
 
     if (transactionSource === 'route') {
       attributes[URL_TEMPLATE] = spanName;

packages/vue/test/routeProvider.test.ts

@@ -0,0 +1,60 @@
+import { GLOBAL_OBJ } from '@sentry/core';
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+import type { Route } from '../src/router';
+import { createVueRouteProvider } from '../src/router';
+
+function makeRoute(overrides: Partial<Route> = {}): Route {
+  return { path: '/users/42', query: {}, params: {}, matched: [{ path: '/users/:id' }], ...overrides };
+}
+
+/** Vue Router 4+ returns the route itself. */
+function makeV4Router(route: Route | undefined) {
+  return { onError: () => {}, beforeEach: () => {}, resolve: () => route as Route };
+}
+
+/** Vue Router 3 wraps the route in `{ route }` and exposes `mode`. */
+function makeV3Router(route: Route) {
+  return { onError: () => {}, beforeEach: () => {}, mode: 'history', resolve: () => ({ route }) };
+}
+
+describe('createVueRouteProvider', () => {
+  beforeEach(() => {
+    (GLOBAL_OBJ as { document?: unknown }).document = { location: { href: 'https://example.com/users/42' } };
+  });
+
+  afterEach(() => {
+    delete (GLOBAL_OBJ as { document?: unknown }).document;
+  });
+
+  it('resolves the matched route path for Vue Router 4+', () => {
+    const provider = createVueRouteProvider(makeV4Router(makeRoute()), 'path');
+
+    expect(provider.resolveRoute(new URL('https://example.com/users/42'))).toBe('/users/:id');
+  });
+
+  it('unwraps the `{ route }` shape Vue Router 3 resolves to', () => {
+    const provider = createVueRouteProvider(makeV3Router(makeRoute()), 'path');
+
+    expect(provider.resolveRoute(new URL('https://example.com/users/42'))).toBe('/users/:id');
+  });
+
+  it('returns undefined when the router cannot resolve', () => {
+    const provider = createVueRouteProvider(makeV4Router(undefined), 'path');
+
+    expect(provider.resolveRoute(new URL('https://example.com/nope'))).toBeUndefined();
+  });
+
+  // `VueRouter` is a hand-rolled structural interface spanning Vue Router 2, 3 and 4+, so `resolve`
+  // is treated as optional rather than assumed present on every router the user passes in.
+  it('returns undefined for a router that exposes no `resolve`', () => {
+    const provider = createVueRouteProvider({ onError: () => {}, beforeEach: () => {} }, 'path');
+
+    expect(provider.resolveRoute(new URL('https://example.com/users/42'))).toBeUndefined();
+  });
+
+  it('resolves the current route from the document location', () => {
+    const provider = createVueRouteProvider(makeV4Router(makeRoute()), 'path');
+
+    expect(provider.resolveCurrentRoute()).toBe('/users/:id');
+  });
+});