Clean sourcemaps from static output (#12749)

* Clean sourcemaps from static output

* Add changeset

* Update test to look at frontend sourcemaps

.changeset/tame-spoons-shop.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Clean server sourcemaps from static output

packages/astro/src/core/build/index.ts

@@ -205,7 +205,8 @@ class AstroBuilder {
 			key: keyPromise,
 		};
 
-		const { internals, ssrOutputChunkNames, contentFileNames } = await viteBuild(opts);
+		const { internals, ssrOutputChunkNames } =
+			await viteBuild(opts);
 
 		const hasServerIslands = this.settings.serverIslandNameMap.size > 0;
 		// Error if there are server islands but no adapter provided.
@@ -213,7 +214,7 @@ class AstroBuilder {
 			throw new AstroError(AstroErrorData.NoAdapterInstalledServerIslands);
 		}
 
-		await staticBuild(opts, internals, ssrOutputChunkNames, contentFileNames);
+		await staticBuild(opts, internals, ssrOutputChunkNames);
 
 		// Write any additionally generated assets to disk.
 		this.timer.assetsStart = performance.now();

packages/astro/src/core/build/static-build.ts

@@ -92,7 +92,6 @@ export async function viteBuild(opts: StaticBuildOptions) {
 	const ssrOutputs = viteBuildReturnToRollupOutputs(ssrOutput);
 	const clientOutputs = viteBuildReturnToRollupOutputs(clientOutput ?? []);
 	await runPostBuildHooks(container, ssrOutputs, clientOutputs);
-	let contentFileNames: string[] | undefined = undefined;
 	settings.timer.end('Client build');
 
 	// Free up memory
@@ -112,20 +111,19 @@ export async function viteBuild(opts: StaticBuildOptions) {
 		}
 	}
 
-	return { internals, ssrOutputChunkNames, contentFileNames };
+	return { internals, ssrOutputChunkNames };
 }
 
 export async function staticBuild(
 	opts: StaticBuildOptions,
 	internals: BuildInternals,
 	ssrOutputChunkNames: string[],
-	contentFileNames?: string[],
 ) {
 	const { settings } = opts;
 	if (settings.buildOutput === 'static') {
 		settings.timer.start('Static generate');
 		await generatePages(opts, internals);
-		await cleanServerOutput(opts, ssrOutputChunkNames, contentFileNames, internals);
+		await cleanServerOutput(opts, ssrOutputChunkNames, internals);
 		settings.timer.end('Static generate');
 	} else if (settings.buildOutput === 'server') {
 		settings.timer.start('Server generate');
@@ -354,14 +352,12 @@ async function cleanStaticOutput(opts: StaticBuildOptions, internals: BuildInter
 async function cleanServerOutput(
 	opts: StaticBuildOptions,
 	ssrOutputChunkNames: string[],
-	contentFileNames: string[] | undefined,
 	internals: BuildInternals,
 ) {
 	const out = getOutDirWithinCwd(opts.settings.config.outDir);
 	// The SSR output chunks for Astro are all .mjs files
 	const files = ssrOutputChunkNames
-		.filter((f) => f.endsWith('.mjs'))
-		.concat(contentFileNames ?? []);
+		.filter((f) => f.endsWith('.mjs'));
 	if (internals.manifestFileName) {
 		files.push(internals.manifestFileName);
 	}
@@ -370,7 +366,11 @@ async function cleanServerOutput(
 		await Promise.all(
 			files.map(async (filename) => {
 				const url = new URL(filename, out);
-				await fs.promises.rm(url);
+				const map = new URL(url + '.map');
+				await Promise.all([
+					fs.promises.rm(url),
+					fs.promises.rm(new URL(map)).catch((e) => {})
+				]);
 			}),
 		);
 
@@ -426,6 +426,8 @@ async function ssrMoveAssets(opts: StaticBuildOptions) {
 		cwd: fileURLToPath(serverAssets),
 	});
 
+	console.log("FILES2", files);
+
 	if (files.length > 0) {
 		await Promise.all(
 			files.map(async function moveAsset(filename) {

packages/astro/test/astro-basic.test.js

@@ -167,6 +167,14 @@ describe('Astro basic build', () => {
 		assert.doesNotMatch(otherHtml, /<style/);
 	});
 
+	it('server sourcemaps not included in output', async () => {
+		const files = await fixture.readdir('/');
+		const hasSourcemaps = files.some(fileName => {
+			return fileName.endsWith('.map');
+		});
+		assert.equal(hasSourcemaps, false, 'no sourcemap files in output');
+	});
+
 	describe('preview', () => {
 		it('returns 200 for valid URLs', async () => {
 			const result = await fixture.fetch('/');

packages/astro/test/fixtures/astro-basic/astro.config.mjs

@@ -6,5 +6,10 @@ import { defineConfig } from 'astro/config';
 export default defineConfig({
 	integrations: [preact(), mdx()],
 	// make sure CLI flags have precedence
-  server: () => ({ port: 4321 })
+  server: () => ({ port: 4321 }),
+  vite: {
+  	build: {
+  		sourcemap: true,
+  	}
+  }
 });

packages/astro/test/sourcemap.test.js

@@ -17,7 +17,13 @@ describe('Sourcemap', async () => {
 	});
 
 	it('Builds non-empty sourcemap', async () => {
-		const map = await fixture.readFile('renderers.mjs.map');
+		const assets = await fixture.readdir('/_astro');
+		const maps = assets.filter(file => file.endsWith('.map'));
+		assert.ok(maps.length > 0, 'got source maps');
+		for(const mapName of maps) {
+			const filename = `/_astro/${mapName}`;
+			const map = await fixture.readFile(filename);
 			assert.equal(map.includes('"sources":[]'), false);
+		}
 	});
 });