fix: squoosh not working on Windows in certain situations (#7826)

.changeset/calm-balloons-study.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix `astro:assets` not working on Windows in build when using Squoosh

packages/astro/src/assets/services/squoosh.ts

@@ -7,7 +7,6 @@ import {
 	parseQuality,
 	type BaseServiceTransform,
 	type LocalImageService,
-	type LocalImageTransform,
 } from './service.js';
 import { processBuffer } from './vendor/squoosh/image-pool.js';
 import type { Operation } from './vendor/squoosh/image.js';
@@ -30,15 +29,8 @@ const qualityTable: Record<
 	// Squoosh's PNG encoder does not support a quality setting, so we can skip that here
 };
 
-async function getRotationForEXIF(
-	transform: LocalImageTransform,
-	inputBuffer: Buffer
-): Promise<Operation | undefined> {
-	// check EXIF orientation data and rotate the image if needed
-	const filePath = transform.src.slice('/@fs'.length);
-	const filePathURL = new URL('.' + filePath, 'file:');
-	const meta = await imageMetadata(filePathURL, inputBuffer);
-
+async function getRotationForEXIF(inputBuffer: Buffer): Promise<Operation | undefined> {
+	const meta = await imageMetadata(inputBuffer);
 	if (!meta) return undefined;
 
 	// EXIF orientations are a bit hard to read, but the numbers are actually standard. See https://exiftool.org/TagNames/EXIF.html for a list.
@@ -71,7 +63,7 @@ const service: LocalImageService = {
 
 		const operations: Operation[] = [];
 
-		const rotation = await getRotationForEXIF(transform, inputBuffer);
+		const rotation = await getRotationForEXIF(inputBuffer);
 
 		if (rotation) {
 			operations.push(rotation);

packages/astro/src/assets/types.ts

@@ -17,7 +17,7 @@ declare global {
 }
 
 /**
- * Type returned by ESM imports of images and direct calls to imageMetadata
+ * Type returned by ESM imports of images
  */
 export interface ImageMetadata {
 	src: string;

packages/astro/src/assets/utils/emitAsset.ts

@@ -1,4 +1,4 @@
-import fs from 'node:fs';
+import fs from 'node:fs/promises';
 import path from 'node:path';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 import { prependForwardSlash, slash } from '../../core/path.js';
@@ -15,34 +15,46 @@ export async function emitESMImage(
 	}
 
 	const url = pathToFileURL(id);
-	const meta = await imageMetadata(url);
+	let fileData: Buffer;
+	try {
+		fileData = await fs.readFile(url);
+	} catch (err) {
+		return undefined;
+	}
 
-	if (!meta) {
+	const fileMetadata = await imageMetadata(fileData);
+
+	if (!fileMetadata) {
 		return undefined;
 	}
 
+	const emittedImage: ImageMetadata = {
+		src: '',
+		...fileMetadata,
+	};
+
 	// Build
 	if (!watchMode) {
 		const pathname = decodeURI(url.pathname);
-		const filename = path.basename(pathname, path.extname(pathname) + `.${meta.format}`);
+		const filename = path.basename(pathname, path.extname(pathname) + `.${fileMetadata.format}`);
 
 		const handle = fileEmitter({
 			name: filename,
-			source: await fs.promises.readFile(url),
+			source: await fs.readFile(url),
 			type: 'asset',
 		});
 
-		meta.src = `__ASTRO_ASSET_IMAGE__${handle}__`;
+		emittedImage.src = `__ASTRO_ASSET_IMAGE__${handle}__`;
 	} else {
 		// Pass the original file information through query params so we don't have to load the file twice
-		url.searchParams.append('origWidth', meta.width.toString());
-		url.searchParams.append('origHeight', meta.height.toString());
-		url.searchParams.append('origFormat', meta.format);
+		url.searchParams.append('origWidth', fileMetadata.width.toString());
+		url.searchParams.append('origHeight', fileMetadata.height.toString());
+		url.searchParams.append('origFormat', fileMetadata.format);
 
-		meta.src = `/@fs` + prependForwardSlash(fileURLToNormalizedPath(url));
+		emittedImage.src = `/@fs` + prependForwardSlash(fileURLToNormalizedPath(url));
 	}
 
-	return meta;
+	return emittedImage;
 }
 
 function fileURLToNormalizedPath(filePath: URL): string {

packages/astro/src/assets/utils/metadata.ts

@@ -1,30 +1,15 @@
-import fs from 'node:fs/promises';
-import { fileURLToPath } from 'node:url';
 import type { ImageInputFormat, ImageMetadata } from '../types.js';
 import imageSize from '../vendor/image-size/index.js';
 
-export async function imageMetadata(
-	src: URL | string,
-	data?: Buffer
-): Promise<ImageMetadata | undefined> {
-	let file = data;
-	if (!file) {
-		try {
-			file = await fs.readFile(src);
-		} catch (e) {
-			return undefined;
-		}
-	}
-
-	const { width, height, type, orientation } = imageSize(file);
+export async function imageMetadata(data: Buffer): Promise<Omit<ImageMetadata, 'src'> | undefined> {
+	const { width, height, type, orientation } = imageSize(data);
 	const isPortrait = (orientation || 0) >= 5;
 
 	if (!width || !height || !type) {
 		return undefined;
 	}
 
 	return {
-		src: fileURLToPath(src),
 		width: isPortrait ? height : width,
 		height: isPortrait ? width : height,
 		format: type as ImageInputFormat,

packages/astro/test/fixtures/core-image-ssr/src/pages/api.ts

@@ -1,4 +1,4 @@
-import { APIRoute } from "../../../../../src/@types/astro";
+import type { APIRoute } from "../../../../../src/@types/astro";
 
 export const get = (async ({ params, request }) => {
 	const url = new URL(request.url);