From 3e4cfea4e29ab958d69e4502c1f634a007393a7b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mikkel=20T=C3=B8nder?=
 <71938724+Mikkel-T@users.noreply.github.com>
Date: Fri, 3 Dec 2021 16:53:11 +0100
Subject: [PATCH] Make aliases work on windows (#2109)

* Make aliases work on windows

Change all occurrences of path.posix to path.

* Remove console log statement

* Update index.ts

* Update index.ts

* Update index.ts

* Edit changeset
---
 .changeset/chilled-coins-wash.md                     | 5 +++++
 packages/astro/src/vite-plugin-config-alias/index.ts | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/chilled-coins-wash.md

diff --git a/.changeset/chilled-coins-wash.md b/.changeset/chilled-coins-wash.md
new file mode 100644
index 000000000..df26f52d1
--- /dev/null
+++ b/.changeset/chilled-coins-wash.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes aliases on windows.
diff --git a/packages/astro/src/vite-plugin-config-alias/index.ts b/packages/astro/src/vite-plugin-config-alias/index.ts
index 7ed003b1b..b1e421187 100644
--- a/packages/astro/src/vite-plugin-config-alias/index.ts
+++ b/packages/astro/src/vite-plugin-config-alias/index.ts
@@ -35,7 +35,7 @@ const getConfigAlias = (cwd: string | undefined): Alias[] | null => {
   if (!compilerOptions.baseUrl) return null;
 
   // resolve the base url from the configuration file directory
-  const baseUrl = path.posix.resolve(path.posix.dirname(normalize(config.path)), normalize(compilerOptions.baseUrl));
+  const baseUrl = path.posix.resolve(path.posix.dirname(normalize(config.path).replace(/^\/?/, '/')), normalize(compilerOptions.baseUrl));
 
   /** List of compiled alias expressions. */
   const aliases: Alias[] = [];