From 4647b62f4de9f41ade680bbb90da7d11e2c79547 Mon Sep 17 00:00:00 2001
From: Eric Rozell <erozell@outlook.com>
Date: Tue, 6 Sep 2016 08:52:17 -0700
Subject: [PATCH] fix(packager): support node-haste browser and react-native
 replacements on Windows

Summary:
Explain the **motivation** for making this change. What existing problem does the pull request solve?

Fix issue with browser and react-native module mappings in node-haste when running the packager from Windows.

**Test plan (required)**

Tested on the NPM package uuid, which has a browser mapping, and it worked.

Fixes #9570
Closes https://github.com/facebook/react-native/pull/9572

Differential Revision: D3821761

Pulled By: davidaurelio

fbshipit-source-id: ebbd91f9e3215385afe3b81a97a962b45a6286f9
---
 packager/react-packager/src/node-haste/Package.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/packager/react-packager/src/node-haste/Package.js b/packager/react-packager/src/node-haste/Package.js
index 07ffa5de9..5622e4120 100644
--- a/packager/react-packager/src/node-haste/Package.js
+++ b/packager/react-packager/src/node-haste/Package.js
@@ -58,7 +58,7 @@ class Package {
         return name;
       }
 
-      if (name[0] !== '/') {
+      if (!isAbsolutePath(name)) {
         const replacement = replacements[name];
         // support exclude with "someDependency": false
         return replacement === false
@@ -66,11 +66,11 @@ class Package {
           : replacement || name;
       }
 
-      if (!isAbsolutePath(name)) {
-        throw new Error(`Expected ${name} to be absolute path`);
+      let relPath = './' + path.relative(this.root, name);
+      if (path.sep !== '/') {
+        relPath = relPath.replace(path.sep, '/');
       }
 
-      const relPath = './' + path.relative(this.root, name);
       let redirect = replacements[relPath];
 
       // false is a valid value