Fix usage of prerender option with serverBundles

Author: markdalgleish

.changeset/dry-impalas-live.md

@@ -0,0 +1,5 @@
+---
+"@react-router/dev": patch
+---
+
+Fix usage of `prerender` option when `serverBundles` option has been configured or provided by a preset, e.g. `vercelPreset` from `@vercel/react-router`

integration/vite-prerender-test.ts

@@ -285,6 +285,60 @@ test.describe("Prerendering", () => {
       expect(html).toMatch('<p data-loader-data="true">About Loader Data</p>');
     });
 
+    test("Prerenders a static array of routes with server bundles", async () => {
+      fixture = await createFixture({
+        prerender: true,
+        files: {
+          ...files,
+          "react-router.config.ts": js`
+          let counter = 1;
+          export default {
+            serverBundles: () => "server" + counter++,
+            async prerender() {
+              await new Promise(r => setTimeout(r, 1));
+              return ['/', '/about'];
+            },
+          }
+        `,
+          "vite.config.ts": js`
+          import { defineConfig } from "vite";
+          import { reactRouter } from "@react-router/dev/vite";
+
+          export default defineConfig({
+            build: { manifest: true },
+            plugins: [
+              reactRouter()
+            ],
+          });
+        `,
+        },
+      });
+      appFixture = await createAppFixture(fixture);
+
+      let clientDir = path.join(fixture.projectDir, "build", "client");
+      expect(listAllFiles(clientDir).sort()).toEqual([
+        "_root.data",
+        "about.data",
+        "about/index.html",
+        "favicon.ico",
+        "index.html",
+      ]);
+
+      let res = await fixture.requestDocument("/");
+      let html = await res.text();
+      expect(html).toMatch("<title>Index Title: Index Loader Data</title>");
+      expect(html).toMatch("<h1>Root</h1>");
+      expect(html).toMatch('<h2 data-route="true">Index</h2>');
+      expect(html).toMatch('<p data-loader-data="true">Index Loader Data</p>');
+
+      res = await fixture.requestDocument("/about");
+      html = await res.text();
+      expect(html).toMatch("<title>About Title: About Loader Data</title>");
+      expect(html).toMatch("<h1>Root</h1>");
+      expect(html).toMatch('<h2 data-route="true">About</h2>');
+      expect(html).toMatch('<p data-loader-data="true">About Loader Data</p>');
+    });
+
     test("Prerenders a dynamic array of routes based on the static routes", async () => {
       fixture = await createFixture({
         files: {

packages/react-router-dev/vite/plugin.ts

@@ -199,6 +199,28 @@ const isRouteVirtualModule = (id: string): boolean => {
   return isRouteEntryModuleId(id) || isRouteChunkModuleId(id);
 };
 
+const isServerBuildVirtualModuleId = (id: string): boolean => {
+  return id.split("?")[0] === virtual.serverBuild.id;
+};
+
+const getServerBuildFile = (viteManifest: Vite.Manifest): string => {
+  let serverBuildIds = Object.keys(viteManifest).filter(
+    isServerBuildVirtualModuleId
+  );
+
+  invariant(
+    serverBuildIds.length <= 1,
+    "Multiple server build files found in manifest"
+  );
+
+  invariant(
+    serverBuildIds.length === 1,
+    "Server build file not found in manifest"
+  );
+
+  return viteManifest[serverBuildIds[0]].file;
+};
+
 export type ServerBundleBuildConfig = {
   routes: RouteManifest;
   serverBundleId: string;
@@ -1518,7 +1540,7 @@ export const reactRouterVitePlugin: ReactRouterVitePlugin = () => {
               viteConfig,
               ctx.reactRouterConfig,
               serverBuildDirectory,
-              ssrViteManifest[virtual.serverBuild.id].file,
+              getServerBuildFile(ssrViteManifest),
               clientBuildDirectory
             );
           }
@@ -1531,7 +1553,7 @@ export const reactRouterVitePlugin: ReactRouterVitePlugin = () => {
               viteConfig,
               ctx.reactRouterConfig,
               serverBuildDirectory,
-              ssrViteManifest[virtual.serverBuild.id].file,
+              getServerBuildFile(ssrViteManifest),
               clientBuildDirectory
             );
           }
@@ -2406,19 +2428,28 @@ async function handlePrerender(
     serverBuildPath
   );
 
-  let routes = createPrerenderRoutes(build.routes);
+  let routes = createPrerenderRoutes(reactRouterConfig.routes);
+  for (let path of build.prerender) {
+    let matches = matchRoutes(routes, `/${path}/`.replace(/^\/\/+/, "/"));
+    if (!matches) {
+      throw new Error(
+        `Unable to prerender path because it does not match any routes: ${path}`
+      );
+    }
+  }
+
+  let buildRoutes = createPrerenderRoutes(build.routes);
   let headers = {
     // Header that can be used in the loader to know if you're running at
     // build time or runtime
     "X-React-Router-Prerender": "yes",
   };
   for (let path of build.prerender) {
     // Ensure we have a leading slash for matching
-    let matches = matchRoutes(routes, `/${path}/`.replace(/^\/\/+/, "/"));
-    invariant(
-      matches,
-      `Unable to prerender path because it does not match any routes: ${path}`
-    );
+    let matches = matchRoutes(buildRoutes, `/${path}/`.replace(/^\/\/+/, "/"));
+    if (!matches) {
+      continue;
+    }
     // When prerendering a resource route, we don't want to pass along the
     // `.data` file since we want to prerender the raw Response returned from
     // the loader.  Presumably this is for routes where a file extension is