From fb46e39cadd18d9ecaaa0c8688b17fb2d8b3c551 Mon Sep 17 00:00:00 2001
From: David Aurelio <davidaurelio@fb.com>
Date: Tue, 20 Oct 2015 09:44:24 -0700
Subject: [PATCH] Make the modification time of the transformer file relevant
 for the cache.

Reviewed By: amasad

Differential Revision: D2554956

fb-gh-sync-id: cc76f083594aac04c74a4ef271305238b06710eb
---
 packager/react-packager/src/Cache/index.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packager/react-packager/src/Cache/index.js b/packager/react-packager/src/Cache/index.js
index 708f8cbd7..cbd9e2150 100644
--- a/packager/react-packager/src/Cache/index.js
+++ b/packager/react-packager/src/Cache/index.js
@@ -189,12 +189,21 @@ class Cache {
   }
 
   _getCacheFilePath(options) {
+    let mtime;
+    try {
+      ({mtime} = fs.statSync(options.transformModulePath));
+      mtime = String(mtime.getTime());
+    } catch (error) {
+      mtime = '';
+    }
+
     return getCacheFilePath(
       'react-packager-cache-',
       version,
       options.projectRoots.join(',').split(path.sep).join('-'),
       options.cacheVersion || '0',
       options.transformModulePath,
+      mtime
     );
   }
 }