From 3c1cf9f6886a3f84932674052fce8ab7d5122ff9 Mon Sep 17 00:00:00 2001
From: Miguel Jimenez Esun <mjimenez@fb.com>
Date: Thu, 26 Apr 2018 12:04:03 -0700
Subject: [PATCH] Enforce by default a local FileStore cache

Reviewed By: davidaurelio

Differential Revision: D7774249

fbshipit-source-id: ec00cfc4982fa1077a9b6e9cd2be419f59323595
---
 packages/metro/src/Config.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/metro/src/Config.js b/packages/metro/src/Config.js
index 38252add..b86ca877 100644
--- a/packages/metro/src/Config.js
+++ b/packages/metro/src/Config.js
@@ -10,9 +10,11 @@
 'use strict';
 
 const blacklist = require('./blacklist');
+const os = require('os');
 const path = require('path');
 
 const {providesModuleNodeModules} = require('./defaults');
+const {FileStore} = require('metro-cache');
 
 import type {
   GetTransformOptions,
@@ -178,7 +180,11 @@ const DEFAULT = ({
   enhanceMiddleware: middleware => middleware,
   extraNodeModules: {},
   assetTransforms: false,
-  cacheStores: [],
+  cacheStores: [
+    new FileStore({
+      root: path.join(os.tmpdir(), 'metro-cache'),
+    }),
+  ],
   cacheVersion: '1.0',
   dynamicDepsInPackages: 'throwAtRuntime',
   getAsyncRequireModulePath: () => 'metro/src/lib/bundle-modules/asyncRequire',