fix: use the closest package.json as root when workspace not found fo… (

vitejs#3374)

packages/vite/src/node/server/searchRoot.ts

@@ -34,9 +34,30 @@ function hasRootFile(root: string): boolean {
   return ROOT_FILES.some((file) => fs.existsSync(join(root, file)))
 }
 
+function hasPackageJSON(root: string) {
+  const path = join(root, 'package.json')
+  return fs.existsSync(path)
+}
+
+/**
+ * Search up for the nearest `package.json`
+ */
+export function searchForPackageRoot(current: string, root = current): string {
+  if (hasPackageJSON(current)) return current
+
+  const dir = dirname(current)
+  // reach the fs root
+  if (!dir || dir === current) return root
+
+  return searchForPackageRoot(dir, root)
+}
+
+/**
+ * Search up for the nearest workspace root
+ */
 export function searchForWorkspaceRoot(
   current: string,
-  root = current
+  root = searchForPackageRoot(current)
 ): string {
   if (hasRootFile(current)) return current
   if (hasWorkspacePackageJSON(current)) return current