From f90b9798def35636e7a413d475b850bbfcc6a3cc Mon Sep 17 00:00:00 2001
From: Samuel Cochran <sj26@sj26.com>
Date: Sat, 9 Jun 2018 16:40:01 +1000
Subject: [PATCH] Fix babel config in package.json

Babel seems to mutate the passed-in config, so if we pass in the
package.babel directly it will mutate the package config, then the next
time it compiles the same file it will have duplicate plugins, etc.

Instead, if loading config from a packageKey, clone the config before
returning so it can't be mutated.
---
 package.json | 1 +
 src/Asset.js | 3 ++-
 yarn.lock    | 4 ++++
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 5110b02abdc..a01f058aa08 100644
--- a/package.json
+++ b/package.json
@@ -28,6 +28,7 @@
     "babylon-walk": "^1.0.2",
     "browserslist": "^3.2.6",
     "chalk": "^2.1.0",
+    "clone": "^2.1.1",
     "command-exists": "^1.2.6",
     "commander": "^2.11.0",
     "cross-spawn": "^6.0.4",
diff --git a/src/Asset.js b/src/Asset.js
index 9854f193cbd..0931a4fffe5 100644
--- a/src/Asset.js
+++ b/src/Asset.js
@@ -1,5 +1,6 @@
 const URL = require('url');
 const path = require('path');
+const clone = require('clone');
 const fs = require('./utils/fs');
 const objectHash = require('./utils/objectHash');
 const md5 = require('./utils/md5');
@@ -136,7 +137,7 @@ class Asset {
     if (opts.packageKey) {
       let pkg = await this.getPackage();
       if (pkg && pkg[opts.packageKey]) {
-        return pkg[opts.packageKey];
+        return clone(pkg[opts.packageKey]);
       }
     }
 
diff --git a/yarn.lock b/yarn.lock
index 11c90012106..202ca80dd7b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1328,6 +1328,10 @@ clone@^1.0.2:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/clone/-/clone-1.0.4.tgz#da309cc263df15994c688ca902179ca3c7cd7c7e"
 
+clone@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/clone/-/clone-2.1.1.tgz#d217d1e961118e3ac9a4b8bba3285553bf647cdb"
+
 clones@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/clones/-/clones-1.1.0.tgz#87e904132d6140c5c0b72006c08c0d05bd7b63b3"