Fix incorrect path in error overlay on Win

.changeset/honest-paws-behave.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix incorrect path to file in error overlay on Win

packages/astro/e2e/errors.test.js

@@ -52,6 +52,28 @@ test.describe('Error display', () => {
 		expect(await page.locator('vite-error-overlay').count()).toEqual(0);
 	});
 
+	test('shows correct file path when a page has an error', async ({ page, astro }) => {
+		await page.goto(astro.resolveUrl('/import-not-found'));
+
+		const { fileLocation, absoluteFileLocation } = await getErrorOverlayContent(page);
+		const absoluteFileUrl = 'file://' + absoluteFileLocation.replace(/:\d+:\d+$/, '');
+		const fileExists = astro.pathExists(absoluteFileUrl);
+
+		expect(fileExists).toBeTruthy();
+		expect(fileLocation).toMatch(/^pages\/import-not-found\.astro/);
+	});
+
+	test('shows correct file path when a component has an error', async ({ page, astro }) => {
+		await page.goto(astro.resolveUrl('/preact-runtime-error'));
+
+		const { fileLocation, absoluteFileLocation } = await getErrorOverlayContent(page);
+		const absoluteFileUrl = 'file://' + absoluteFileLocation.replace(/:\d+:\d+$/, '');
+		const fileExists = astro.pathExists(absoluteFileUrl);
+
+		expect(fileExists).toBeTruthy();
+		expect(fileLocation).toMatch(/^components\/PreactRuntimeError.jsx/);
+	});
+
 	test('framework errors recover when fixed', async ({ page, astro }) => {
 		await page.goto(astro.resolveUrl('/svelte-syntax-error'));
 

packages/astro/e2e/test-utils.js

@@ -35,7 +35,7 @@ export function testFactory(inlineConfig) {
 /**
  *
  * @param {string} page
- * @returns {Promise<{message: string, hint: string}>}
+ * @returns {Promise<{message: string, hint: string, absoluteFileLocation: string, fileLocation: string}>}
  */
 export async function getErrorOverlayContent(page) {
 	const overlay = await page.waitForSelector('vite-error-overlay', {
@@ -47,8 +47,11 @@ export async function getErrorOverlayContent(page) {
 
 	const message = await overlay.$$eval('#message-content', (m) => m[0].textContent);
 	const hint = await overlay.$$eval('#hint-content', (m) => m[0].textContent);
-
-	return { message, hint };
+	const [absoluteFileLocation, fileLocation] = await overlay.$$eval('#code header h2', (m) => [
+		m[0].title,
+		m[0].textContent,
+	]);
+	return { message, hint, absoluteFileLocation, fileLocation };
 }
 
 /**

packages/astro/src/core/errors/dev/utils.ts

@@ -4,11 +4,13 @@ import * as fs from 'node:fs';
 import { isAbsolute, join } from 'node:path';
 import { fileURLToPath } from 'node:url';
 import stripAnsi from 'strip-ansi';
+import { normalizePath } from 'vite';
 import type { ESBuildTransformResult } from 'vite';
 import type { SSRError } from '../../../@types/astro.js';
 import { AggregateError, type ErrorWithMetadata } from '../errors.js';
 import { codeFrame } from '../printer.js';
 import { normalizeLF } from '../utils.js';
+import { removeLeadingForwardSlashWindows } from '../../path.js';
 
 type EsbuildMessage = ESBuildTransformResult['warnings'][number];
 
@@ -32,10 +34,15 @@ export function collectErrorMetadata(e: any, rootFolder?: URL | undefined): Erro
 		// - We'll fail to show the file's content in the browser
 		// - We'll fail to show the code frame in the terminal
 		// - The "Open in Editor" button won't work
+
+		// Normalize the paths so that we can correctly detect if it's absolute on any platform
+		const normalizedFile = normalizePath(error.loc?.file || '');
+		const normalizedRootFolder = removeLeadingForwardSlashWindows(rootFolder?.pathname || '');
+
 		if (
 			error.loc?.file &&
 			rootFolder &&
-			(!error.loc.file.startsWith(rootFolder.pathname) || !isAbsolute(error.loc.file))
+			(!normalizedFile?.startsWith(normalizedRootFolder) || !isAbsolute(normalizedFile))
 		) {
 			error.loc.file = join(fileURLToPath(rootFolder), error.loc.file);
 		}

packages/astro/src/core/errors/overlay.ts

@@ -637,7 +637,8 @@ class ErrorOverlay extends HTMLElement {
 			const codeContent = code.querySelector<HTMLDivElement>('#code-content');
 
 			if (codeHeader) {
-				const cleanFile = err.loc.file.split('/').slice(-2).join('/');
+				const separator = err.loc.file.includes('/') ? '/' : '\\';
+				const cleanFile = err.loc.file.split(separator).slice(-2).join('/');
 				const fileLocation = [cleanFile, err.loc.line, err.loc.column].filter(Boolean).join(':');
 				const absoluteFileLocation = [err.loc.file, err.loc.line, err.loc.column]
 					.filter(Boolean)