From be44e608e77bcac28ad59de9acbace31851139f2 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Sat, 11 Jul 2015 16:21:08 +0100
Subject: [PATCH] allowing specifying of babelrc config via package.json -
 closes #1818

---
 .../src/transformation/file/options/option-manager.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/packages/babel/src/transformation/file/options/option-manager.js b/packages/babel/src/transformation/file/options/option-manager.js
index 487b0320e3..700ecd0f53 100644
--- a/packages/babel/src/transformation/file/options/option-manager.js
+++ b/packages/babel/src/transformation/file/options/option-manager.js
@@ -11,7 +11,8 @@ import fs from "fs";
 var existsCache = {};
 var jsonCache   = {};
 
-const CONFIG_FILENAME = ".babelrc";
+const BABELRC_FILENAME = ".babelrc";
+const PACKAGE_FILENAME = "package.json";
 
 function exists(filename) {
   var cached = existsCache[filename];
@@ -49,7 +50,7 @@ export default class OptionManager {
    * Description
    */
 
-  addConfig(loc) {
+  addConfig(loc, key?) {
     if (this.resolvedConfigs.indexOf(loc) >= 0) return;
 
     var content = fs.readFileSync(loc, "utf8");
@@ -57,6 +58,7 @@ export default class OptionManager {
 
     try {
       opts = jsonCache[content] = jsonCache[content] || JSON.parse(stripJsonComments(content));
+      if (key) opts = opts[key];
     } catch (err) {
       err.message = `${loc}: ${err.message}`;
       throw err;
@@ -103,8 +105,11 @@ export default class OptionManager {
     while (loc !== (loc = path.dirname(loc))) {
       if (this.options.breakConfig) return;
 
-      var configLoc = path.join(loc, CONFIG_FILENAME);
+      var configLoc = path.join(loc, BABELRC_FILENAME);
       if (exists(configLoc)) this.addConfig(configLoc);
+
+      var pkgLoc = path.join(loc, PACKAGE_FILENAME);
+      if (exists(pkgLoc)) this.addConfig(pkgLoc, "babel");
     }
   }