From f940be1caa51f4d4e0d482ea3ffdd6983244fde7 Mon Sep 17 00:00:00 2001
From: Alex Hunt <huntie@meta.com>
Date: Mon, 17 Feb 2025 05:44:22 -0800
Subject: [PATCH] Remove index.js.flow shim from Node packages (#49461)
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Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/49461

Flow now supports Package Exports 🎉. This means we can delete the compatiblity pattern in each of our build-enabled Node.js packages.

This simplifies the internal package structure needed to support Flow while developing from source in the monorepo — no prod impact.

Changelog: [Internal]

Reviewed By: cipolleschi

Differential Revision: D69741143

fbshipit-source-id: 070715cb6beb00eb393186dbf95856ceb87fabef
---
 packages/community-cli-plugin/index.js.flow          | 12 ------------
 packages/dev-middleware/index.js.flow                | 12 ------------
 .../react-native-compatibility-check/index.js.flow   | 12 ------------
 scripts/build/README.md                              |  2 --
 4 files changed, 38 deletions(-)
 delete mode 100644 packages/community-cli-plugin/index.js.flow
 delete mode 100644 packages/dev-middleware/index.js.flow
 delete mode 100644 packages/react-native-compatibility-check/index.js.flow

diff --git a/packages/community-cli-plugin/index.js.flow b/packages/community-cli-plugin/index.js.flow
deleted file mode 100644
index 17ae7ce0503..00000000000
--- a/packages/community-cli-plugin/index.js.flow
+++ /dev/null
@@ -1,12 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow
- * @format
- * @oncall react_native
- */
-
-export * from './src';
diff --git a/packages/dev-middleware/index.js.flow b/packages/dev-middleware/index.js.flow
deleted file mode 100644
index 17ae7ce0503..00000000000
--- a/packages/dev-middleware/index.js.flow
+++ /dev/null
@@ -1,12 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow
- * @format
- * @oncall react_native
- */
-
-export * from './src';
diff --git a/packages/react-native-compatibility-check/index.js.flow b/packages/react-native-compatibility-check/index.js.flow
deleted file mode 100644
index 17ae7ce0503..00000000000
--- a/packages/react-native-compatibility-check/index.js.flow
+++ /dev/null
@@ -1,12 +0,0 @@
-/**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @flow
- * @format
- * @oncall react_native
- */
-
-export * from './src';
diff --git a/scripts/build/README.md b/scripts/build/README.md
index fffc6cb9210..03938167d61 100644
--- a/scripts/build/README.md
+++ b/scripts/build/README.md
@@ -72,13 +72,11 @@ packages/
       index.js       # Entry point wrapper file (calls babel-register.js) (compiled away)
       index.flow.js  # Entry point implementation in Flow
       [other files]
-    index.js.flow    # Shim for the Flow typechecker
     package.json     # Includes "exports" field, ideally only src/index.js
 ```
 
 Notes:
 
-- The additional root `index.js.flow` shim is needed due to Flow itself not supporting Package Exports.
 - To minimize complexity, prefer only a single entry of `{".": "src/index.js"}` in `"exports"` for new packages.
 
 ## Build behavior