revert: refactor to get whole file path

src/file-utils.ts

@@ -24,9 +24,14 @@ import type { EtaConfig } from './config'
  */
 
 function getWholeFilePath(name: string, parentfile: string, isDirectory?: boolean): string {
-  const includePath =
-    path.resolve(isDirectory ? parentfile : path.dirname(parentfile)) +
-    (path.extname(name) || '.eta')
+  let includePath = path.resolve(
+    isDirectory ? parentfile : path.dirname(parentfile), // returns directory the parent file is in
+    name // file
+  )
+  const ext = path.extname(name)
+  if (!ext) {
+    includePath += '.eta'
+  }
   return includePath
 }