From 654c78f656aaf4e56200f21812b5497c546bc08f Mon Sep 17 00:00:00 2001
From: Daniel Tschinder <daniel@tschinder.de>
Date: Thu, 8 Nov 2018 20:15:17 -0800
Subject: [PATCH] Fix browser files to have the same API as the nodejs ones

---
 .../babel-core/src/transform-file-browser.js  | 25 +++++++++++++++----
 .../src/transform-file-sync-browser.js        |  5 ----
 packages/babel-core/src/transform-file.js     |  8 ++++++
 3 files changed, 28 insertions(+), 10 deletions(-)
 delete mode 100644 packages/babel-core/src/transform-file-sync-browser.js

diff --git a/packages/babel-core/src/transform-file-browser.js b/packages/babel-core/src/transform-file-browser.js
index ed74df780202..fc1b12af0e50 100644
--- a/packages/babel-core/src/transform-file-browser.js
+++ b/packages/babel-core/src/transform-file-browser.js
@@ -1,14 +1,29 @@
 // @flow
-import type { FileResult } from "./transformation";
 
-export default function transformFile(
-  filename: string,
-  opts?: Object = {},
-  callback: (?Error, FileResult | null) => void,
+// duplicated from transform-file so we do not have to import anything here
+type TransformFile = {
+  (filename: string, callback: Function): void,
+  (filename: string, opts: ?Object, callback: Function): void,
+};
+
+export const transformFile: TransformFile = (function transformFile(
+  filename,
+  opts,
+  callback,
 ) {
   if (typeof opts === "function") {
     callback = opts;
   }
 
   callback(new Error("Transforming files is not supported in browsers"), null);
+}: Function);
+
+export function transformFileSync() {
+  throw new Error("Transforming files is not supported in browsers");
+}
+
+export function transformFileAsync() {
+  return Promise.reject(
+    new Error("Transforming files is not supported in browsers"),
+  );
 }
diff --git a/packages/babel-core/src/transform-file-sync-browser.js b/packages/babel-core/src/transform-file-sync-browser.js
deleted file mode 100644
index 144242f3e383..000000000000
--- a/packages/babel-core/src/transform-file-sync-browser.js
+++ /dev/null
@@ -1,5 +0,0 @@
-// @flow
-
-export default function transformFileSync() {
-  throw new Error("Transforming files is not supported in browsers");
-}
diff --git a/packages/babel-core/src/transform-file.js b/packages/babel-core/src/transform-file.js
index 1011bd8a4d89..d3c9ab640fc3 100644
--- a/packages/babel-core/src/transform-file.js
+++ b/packages/babel-core/src/transform-file.js
@@ -9,6 +9,14 @@ import {
   type FileResultCallback,
 } from "./transformation";
 
+import typeof * as transformFileBrowserType from "./transform-file-browser";
+import typeof * as transformFileType from "./transform-file";
+
+// Kind of gross, but essentially asserting that the exports of this module are the same as the
+// exports of transform-file-browser, since this file may be replaced at bundle time with
+// transform-file-browser.
+((({}: any): $Exact<transformFileBrowserType>): $Exact<transformFileType>);
+
 type TransformFile = {
   (filename: string, callback: FileResultCallback): void,
   (filename: string, opts: ?InputOptions, callback: FileResultCallback): void,