withastro · ematipico · Jun 28, 2023 · Jun 28, 2023
diff --git a/.changeset/unlucky-paws-own.md b/.changeset/unlucky-paws-own.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Correctly emit pre-rendered pages when `build.split` is set to `true`
diff --git a/packages/astro/src/core/build/generate.ts b/packages/astro/src/core/build/generate.ts
@@ -17,6 +17,7 @@ import type {
 	RouteType,
 	SSRError,
 	SSRLoadedRenderer,
+	SSRManifest,
 } from '../../@types/astro';
 import {
 	generateImage as generateImageInternal,
@@ -148,9 +149,27 @@ export async function generatePages(opts: StaticBuildOptions, internals: BuildIn
 		for (const [pageData, filePath] of eachPageDataFromEntryPoint(internals)) {
 			if (pageData.route.prerender) {
 				const ssrEntryURLPage = createEntryURL(filePath, outFolder);
-				const ssrEntryPage: SinglePageBuiltModule = await import(ssrEntryURLPage.toString());
-
-				await generatePage(opts, internals, pageData, ssrEntryPage, builtPaths);
+				const ssrEntryPage = await import(ssrEntryURLPage.toString());
+				if (opts.settings.config.build.split) {
+					// forcing to use undefined, so we fail in an expected way if the module is not even there.
+					const manifest: SSRManifest | undefined = ssrEntryPage.manifest;
+					const ssrEntry = manifest?.pageModule;
+					if (ssrEntry) {
+						await generatePage(opts, internals, pageData, ssrEntry, builtPaths);
+					} else {
+						throw new Error(
+							`Unable to find the manifest for the module ${ssrEntryURLPage.toString()}. This is unexpected and likely a bug in Astro, please report.`
+						);
+					}
+				} else {
+					await generatePage(
+						opts,
+						internals,
+						pageData,
+						ssrEntryPage as SinglePageBuiltModule,
+						builtPaths
+					);
+				}
 			}
 		}
 		for (const pageData of eachRedirectPageData(internals)) {

diff --git a/packages/astro/src/core/build/internal.ts b/packages/astro/src/core/build/internal.ts
@@ -3,9 +3,13 @@ import type { RouteData, SSRResult } from '../../@types/astro';
 import type { PageOptions } from '../../vite-plugin-astro/types';
 import { prependForwardSlash, removeFileExtension } from '../path.js';
 import { viteID } from '../util.js';
-import { ASTRO_PAGE_MODULE_ID, getVirtualModulePageIdFromPath } from './plugins/plugin-pages.js';
+import {
+	ASTRO_PAGE_RESOLVED_MODULE_ID,
+	getVirtualModulePageIdFromPath,
+} from './plugins/plugin-pages.js';
 import { ASTRO_PAGE_EXTENSION_POST_PATTERN } from './plugins/util.js';
 import type { PageBuildData, StylesheetAsset, ViteID } from './types';
+import { RESOLVED_SPLIT_MODULE_ID } from './plugins/plugin-ssr.js';
 
 export interface BuildInternals {
 	/**
@@ -234,7 +238,13 @@ export function* eachPageDataFromEntryPoint(
 	internals: BuildInternals
 ): Generator<[PageBuildData, string]> {
 	for (const [entryPoint, filePath] of internals.entrySpecifierToBundleMap) {
-		if (entryPoint.includes(ASTRO_PAGE_MODULE_ID)) {
+		// virtual pages can be emitted with different prefixes:
+		// - the classic way are pages emitted with prefix ASTRO_PAGE_RESOLVED_MODULE_ID -> plugin-pages
+		// - pages emitted using `build.split`, in this case pages are emitted with prefix RESOLVED_SPLIT_MODULE_ID
+		if (
+			entryPoint.includes(ASTRO_PAGE_RESOLVED_MODULE_ID) ||
+			entryPoint.includes(RESOLVED_SPLIT_MODULE_ID)
+		) {
 			const [, pageName] = entryPoint.split(':');
 			const pageData = internals.pagesByComponent.get(
 				`${pageName.replace(ASTRO_PAGE_EXTENSION_POST_PATTERN, '.')}`

diff --git a/packages/astro/test/fixtures/ssr-split-manifest/src/pages/prerender.astro b/packages/astro/test/fixtures/ssr-split-manifest/src/pages/prerender.astro
@@ -0,0 +1,12 @@
+---
+export const prerender = true
+---
+
+<html>
+<head>
+    <title>Pre render me</title>
+</head>
+<body>
+
+</body>
+</html>
diff --git a/packages/astro/test/ssr-split-manifest.test.js b/packages/astro/test/ssr-split-manifest.test.js
@@ -3,7 +3,8 @@ import { loadFixture } from './test-utils.js';
 import testAdapter from './test-adapter.js';
 import * as cheerio from 'cheerio';
 import { fileURLToPath } from 'node:url';
-import { existsSync } from 'node:fs';
+import { existsSync, readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
 
 describe('astro:ssr-manifest, split', () => {
 	/** @type {import('./test-utils').Fixture} */
@@ -35,15 +36,34 @@ describe('astro:ssr-manifest, split', () => {
 		const html = await response.text();
 
 		const $ = cheerio.load(html);
-		expect($('#assets').text()).to.equal('["/_astro/index.a8a337e4.css"]');
+		expect($('#assets').text()).to.equal('["/_astro/index.a8a337e4.css","/prerender/index.html"]');
 	});
 
 	it('should give access to entry points that exists on file system', async () => {
 		// number of the pages inside src/
-		expect(entryPoints.size).to.equal(4);
+		expect(entryPoints.size).to.equal(5);
 		for (const fileUrl of entryPoints.values()) {
 			let filePath = fileURLToPath(fileUrl);
 			expect(existsSync(filePath)).to.be.true;
 		}
 	});
+
+	it('should correctly emit the the pre render page', async () => {
+		const text = readFileSync(
+			resolve('./test/fixtures/ssr-split-manifest/dist/client/prerender/index.html'),
+			{
+				encoding: 'utf8',
+			}
+		);
+		expect(text.includes('<title>Pre render me</title>')).to.be.true;
+	});
+
+	it('should emit an entry point to request the pre-rendered page', async () => {
+		const pagePath = 'src/pages/prerender.astro';
+		const app = await fixture.loadEntryPoint(pagePath, currentRoutes);
+		const request = new Request('http://example.com/');
+		const response = await app.render(request);
+		const html = await response.text();
+		expect(html.includes('<title>Pre render me</title>')).to.be.true;
+	});
 });
diff --git a/packages/astro/test/test-utils.js b/packages/astro/test/test-utils.js
@@ -252,7 +252,7 @@ export async function loadFixture(inlineConfig) {
 			const virtualModule = getVirtualModulePageNameFromPath(RESOLVED_SPLIT_MODULE_ID, pagePath);
 			const filePath = makeSplitEntryPointFileName(virtualModule, routes);
 			const url = new URL(`./server/${filePath}?id=${fixtureId}`, config.outDir);
-			const { createApp, manifest, middleware } = await import(url);
+			const { createApp, manifest } = await import(url);
 			const app = createApp(streaming);
 			app.manifest = manifest;
 			return app;

diff --git a/packages/integrations/node/test/prerender.test.js b/packages/integrations/node/test/prerender.test.js
@@ -29,7 +29,7 @@ describe('Prerendering', () => {
 				adapter: nodejs({ mode: 'standalone' }),
 			});
 			await fixture.build();
-			const { startServer } = await await load();
+			const { startServer } = await load();
 			let res = startServer();
 			server = res.server;
 		});