From 6e530d9aedf18a8a7eb92d75995f535d91188b88 Mon Sep 17 00:00:00 2001
From: Eli White <eliwhite@fb.com>
Date: Mon, 6 Apr 2020 18:15:08 -0700
Subject: [PATCH] Move DebugEnvironment helper to open source

Summary:
This is an internal only module that we use to detect whether we are in async debugging mode.

Changelog: [Internal]

Reviewed By: yungsters

Differential Revision: D20879780

fbshipit-source-id: 5915f4e1c54a3fda0cf607c77f463120264fdbc4
---
 Libraries/Utilities/DebugEnvironment.js | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 Libraries/Utilities/DebugEnvironment.js

diff --git a/Libraries/Utilities/DebugEnvironment.js b/Libraries/Utilities/DebugEnvironment.js
new file mode 100644
index 00000000000000..c2b3e8ff57ef2c
--- /dev/null
+++ b/Libraries/Utilities/DebugEnvironment.js
@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @flow strict-local
+ */
+
+'use strict';
+
+export let isAsyncDebugging: boolean = false;
+
+if (__DEV__) {
+  // These native interfaces don't exist in asynchronous debugging environments.
+  isAsyncDebugging =
+    !global.nativeExtensions &&
+    !global.nativeCallSyncHook &&
+    !global.RN$Bridgeless;
+}