From 12322661cb7c81aa687fc6f19d5e40bf0c19a7a5 Mon Sep 17 00:00:00 2001
From: Lachlan Heywood <lachieh@users.noreply.github.com>
Date: Mon, 30 Sep 2024 20:53:32 -0400
Subject: [PATCH] fix: set baseUrl if none is provided

---
 src/plugin.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/plugin.ts b/src/plugin.ts
index dbe613d..74d773b 100644
--- a/src/plugin.ts
+++ b/src/plugin.ts
@@ -288,7 +288,13 @@ export function dtsPlugin(options: PluginOptions = {}): import('vite').Plugin {
           : [ensureAbsolute(content?.raw.compilerOptions?.outDir || 'dist', root)]
       }
 
-      const { baseUrl, paths } = compilerOptions
+      const {
+        // Here we are using the default value to set the `baseUrl` to the current directory if no value exists. This is
+        // the same behavior as the TS Compiler. See TS source:
+        // https://github.com/microsoft/TypeScript/blob/3386e943215613c40f68ba0b108cda1ddb7faee1/src/compiler/utilities.ts#L6493-L6501
+        baseUrl = compilerOptions.paths ? process.cwd() : undefined,
+        paths
+      } = compilerOptions
 
       if (pathsToAliases && baseUrl && paths) {
         aliases.push(