From 73ce9568389189e7b5c45ac0cadadd06e6111d9e Mon Sep 17 00:00:00 2001
From: David Aurelio <davidaurelio@fb.com>
Date: Fri, 12 May 2017 09:42:09 -0700
Subject: [PATCH] Use `this` rather than `global` in prelude

Summary: in new-style builds, the prelude is not wrapped into an IIFE, so `global` is not available. Since the bundle as a whole is not running in strict mode, we can access the global object with `this`.

Reviewed By: jeanlauliac

Differential Revision: D5051731

fbshipit-source-id: 4003b5e57ba8626e38e68e92d5778c2c59ca69a5
---
 packages/metro-bundler/src/ModuleGraph/ModuleGraph.js         | 2 +-
 .../src/ModuleGraph/__tests__/ModuleGraph-test.js             | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js b/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js
index cce7ff8a..ac660b5e 100644
--- a/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js
+++ b/packages/metro-bundler/src/ModuleGraph/ModuleGraph.js
@@ -97,6 +97,6 @@ function* concat<T>(...iterables: Array<Iterable<T>>): Iterable<T> {
 function prelude(optimize) {
   return virtualModule(
     `var __DEV__=${String(!optimize)},` +
-    '__BUNDLE_START_TIME__=global.nativePerformanceNow?global.nativePerformanceNow():Date.now();'
+    '__BUNDLE_START_TIME__=this.nativePerformanceNow?nativePerformanceNow():Date.now();'
   );
 }
diff --git a/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js b/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js
index d9a9108a..bc91a412 100644
--- a/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js
+++ b/packages/metro-bundler/src/ModuleGraph/__tests__/ModuleGraph-test.js
@@ -29,7 +29,7 @@ describe('build setup', () => {
         dependencies: [],
         file: {
           code: 'var __DEV__=true,__BUNDLE_START_TIME__=' +
-            'global.nativePerformanceNow?global.nativePerformanceNow():Date.now();',
+            'this.nativePerformanceNow?nativePerformanceNow():Date.now();',
           path: '',
           type: 'script',
         },
@@ -43,7 +43,7 @@ describe('build setup', () => {
       const [prelude] = result.modules;
       expect(prelude.file.code)
         .toEqual('var __DEV__=false,__BUNDLE_START_TIME__=' +
-            'global.nativePerformanceNow?global.nativePerformanceNow():Date.now();');
+            'this.nativePerformanceNow?nativePerformanceNow():Date.now();');
       done();
     });
   });