From 9c29b397553dba24fbc82ba5b847315ed2beaca0 Mon Sep 17 00:00:00 2001
From: aleclarson <alec.stanford.larson@gmail.com>
Date: Wed, 19 Sep 2018 09:45:01 -0400
Subject: [PATCH] use realpath-native

---
 packages/jest-haste-map/package.json             |  1 +
 packages/jest-haste-map/src/crawlers/watchman.js |  2 ++
 packages/jest-haste-map/src/haste_fs.js          | 10 ++++++++--
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/packages/jest-haste-map/package.json b/packages/jest-haste-map/package.json
index b0e5089cf015..2437c738a0a4 100644
--- a/packages/jest-haste-map/package.json
+++ b/packages/jest-haste-map/package.json
@@ -15,6 +15,7 @@
     "jest-serializer": "^23.0.1",
     "jest-worker": "^23.2.0",
     "micromatch": "^2.3.11",
+    "realpath-native": "^1.0.0",
     "sane": "^3.0.0"
   }
 }
diff --git a/packages/jest-haste-map/src/crawlers/watchman.js b/packages/jest-haste-map/src/crawlers/watchman.js
index 5c633ab53241..4e17672f547a 100644
--- a/packages/jest-haste-map/src/crawlers/watchman.js
+++ b/packages/jest-haste-map/src/crawlers/watchman.js
@@ -210,6 +210,7 @@ module.exports = async function watchmanCrawl(
         if (existingFileData && existingFileData[H.MTIME] === mtime) {
           cache.set(fileName, existingFileData);
         } else if (fileData.type !== 'f') {
+          // See ../constants.js
           cache.set(fileName, [undefined, mtime]);
         } else if (
           sha1hex &&
@@ -224,6 +225,7 @@ module.exports = async function watchmanCrawl(
             existingFileData[4],
           ]);
         } else {
+          // See ../constants.js
           cache.set(fileName, ['', mtime, 0, [], sha1hex]);
         }
       }
diff --git a/packages/jest-haste-map/src/haste_fs.js b/packages/jest-haste-map/src/haste_fs.js
index 8e0d0581e49c..beade8e31e95 100644
--- a/packages/jest-haste-map/src/haste_fs.js
+++ b/packages/jest-haste-map/src/haste_fs.js
@@ -11,8 +11,8 @@ import type {Glob, Path} from 'types/Config';
 import type {FileData, LinkData} from 'types/HasteMap';
 
 import * as fastPath from './lib/fast_path';
-import fs from 'fs';
 import micromatch from 'micromatch';
+import {sync as realpath} from 'realpath-native';
 import H from './constants';
 
 export default class HasteFS {
@@ -55,7 +55,13 @@ export default class HasteFS {
 
   follow(file: Path): Path {
     const link = this._links[file];
-    return link ? link[0] || (link[0] = fs.realpathSync(file)) : file;
+    if (link === undefined) {
+      return file;
+    }
+    if (link[0] === undefined) {
+      link[0] = realpath(file);
+    }
+    return link[0];
   }
 
   getAllFiles(): Array<string> {