Add Babel infrastructure

No actual code has been changed yet.

.gitignore

@@ -10,7 +10,8 @@ pids
 # Directory for instrumented libs generated by jscoverage/JSCover
 lib-cov
 
-# Coverage directory used by tools like istanbul
+# Coverage directory used by tools like nyc and istanbul
+.nyc_output
 coverage
 
 # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
@@ -32,3 +33,6 @@ node_modules
 
 # Coveralls token files
 .coveralls.yml
+
+# Babel-compiled files
+lib

package.json

@@ -2,11 +2,13 @@
   "name": "node-fetch",
   "version": "1.6.3",
   "description": "A light-weight module that brings window.fetch to node.js and io.js",
-  "main": "index.js",
+  "main": "lib/index.js",
   "scripts": {
-    "test": "mocha test/test.js",
-    "report": "istanbul cover _mocha -- -R spec test/test.js",
-    "coverage": "istanbul cover _mocha --report lcovonly -- -R spec test/test.js && cat ./coverage/lcov.info | coveralls"
+    "build": "babel -d lib src",
+    "prepublish": "npm run build",
+    "test": "mocha --compilers js:babel-register test/test.js",
+    "report": "cross-env BABEL_ENV=test nyc --reporter lcov --reporter text mocha -R spec test/test.js",
+    "coverage": "cross-env BABEL_ENV=test nyc --reporter lcovonly mocha -R spec test/test.js && cat ./coverage/lcov.info | coveralls"
   },
   "repository": {
     "type": "git",
@@ -24,13 +26,19 @@
   },
   "homepage": "https://github.com/bitinn/node-fetch",
   "devDependencies": {
+    "babel-cli": "^6.16.0",
+    "babel-plugin-istanbul": "^2.0.1",
+    "babel-plugin-transform-runtime": "^6.15.0",
+    "babel-preset-es2015": "^6.16.0",
+    "babel-register": "^6.16.3",
     "bluebird": "^3.3.4",
     "chai": "^3.5.0",
     "chai-as-promised": "^5.2.0",
     "coveralls": "^2.11.2",
+    "cross-env": "^3.0.0",
     "form-data": ">=1.0.0",
-    "istanbul": "^0.4.2",
     "mocha": "^2.1.0",
+    "nyc": "^8.3.0",
     "parted": "^0.1.1",
     "promise": "^7.1.1",
     "resumer": "0.0.0"
@@ -38,5 +46,30 @@
   "dependencies": {
     "encoding": "^0.1.11",
     "is-stream": "^1.0.1"
+  },
+  "babel": {
+    "presets": [
+      "es2015"
+    ],
+    "plugins": [
+      "transform-runtime"
+    ],
+    "env": {
+      "test": {
+        "plugins": [
+          "istanbul"
+        ]
+      }
+    }
+  },
+  "nyc": {
+    "include": [
+      "src/*.js"
+    ],
+    "require": [
+      "babel-register"
+    ],
+    "sourceMap": false,
+    "instrument": false
   }
 }

src/index.js

@@ -12,11 +12,11 @@ var https = require('https');
 var zlib = require('zlib');
 var stream = require('stream');
 
-var Body = require('./lib/body');
-var Response = require('./lib/response');
-var Headers = require('./lib/headers');
-var Request = require('./lib/request');
-var FetchError = require('./lib/fetch-error');
+var Body = require('./body');
+var Response = require('./response');
+var Headers = require('./headers');
+var Request = require('./request');
+var FetchError = require('./fetch-error');
 
 // commonjs
 module.exports = Fetch;

test/test.js

@@ -16,12 +16,12 @@ var fs = require('fs');
 var TestServer = require('./server');
 
 // test subjects
-var fetch = require('../index.js');
-var Headers = require('../lib/headers.js');
-var Response = require('../lib/response.js');
-var Request = require('../lib/request.js');
-var Body = require('../lib/body.js');
-var FetchError = require('../lib/fetch-error.js');
+var fetch = require('../src/index.js');
+var Headers = require('../src/headers.js');
+var Response = require('../src/response.js');
+var Request = require('../src/request.js');
+var Body = require('../src/body.js');
+var FetchError = require('../src/fetch-error.js');
 // test with native promise on node 0.11, and bluebird for node 0.10
 fetch.Promise = fetch.Promise || bluebird;
 
@@ -1122,7 +1122,7 @@ describe('node-fetch', function() {
 			result.push([key, val]);
 		});
 
-		expected = [
+		var expected = [
 			["a", "1"]
 			, ["b", "2"]
 			, ["b", "3"]