Add Babel

- Add node 0.10, 0.12, 4 to travis
- add `make build` and `npm run build`
- rename src files to `src` instead of `lib`

.gitignore

@@ -1,3 +1,4 @@
 node_modules/
 npm-debug.log
 out/
+lib/

.travis.yml

@@ -8,3 +8,6 @@ script:
   npm install && npm test
 node_js:
   - 6
+  - 4
+  - 0.12
+  - 0.10

Makefile

@@ -1,18 +1,23 @@
+PATH := node_modules/.bin:$(PATH)
+
 SRC_FILES=
-SRC_FILES+= lib/*.js
-SRC_FILES+= lib/**/*.js
-SRC_FILES+= lib/**/**/*.js
-SRC_FILES+= lib/**/**/**/*.js
+SRC_FILES+= src/*.js
+SRC_FILES+= src/**/*.js
+SRC_FILES+= src/**/**/*.js
+SRC_FILES+= src/**/**/**/*.js
 
 SRC_FILES+= bin/gyp
 SRC_FILES+= test/*.js
 SRC_FILES+= test/**/*.js
 SRC_FILES+= test/**/**/*.js
 
+build:
+	babel src -d lib
+
 lint:
 	eslint $(SRC_FILES)
 
 format:
 	eslint --fix $(SRC_FILES)
 
-.PHONY: lint format
+.PHONY: build lint format

bin/gyp

@@ -1,7 +1,7 @@
 #!/usr/bin/env node
-const gyp = require('../');
+var gyp = require('../');
 
 // TEMPORARY MEASURE
 process.stdout._handle.setBlocking(true);
-const code = gyp.main(process.argv.slice(1));
+var code = gyp.main(process.argv.slice(1));
 process.exit(code);

package.json

@@ -6,15 +6,22 @@
     "gyp": "bin/gyp"
   },
   "main": "lib/gyp.js",
+  "files": [
+    "lib"
+  ],
   "scripts": {
+    "build": "make build",
     "lint": "make lint",
     "format": "make format",
-    "test": "mocha --reporter=spec test/*-test.js && npm run lint"
+    "test": "mocha --reporter=spec test/*-test.js --compilers js:babel-register && npm run lint"
   },
   "keywords": [],
   "author": "Fedor Indutny <fedor@indutny.com>",
   "license": "MIT",
   "devDependencies": {
+    "babel-cli": "^6.10.1",
+    "babel-preset-es2015": "^6.9.0",
+    "babel-register": "^6.9.0",
     "eslint": "^2.12.0",
     "mocha": "^2.5.3",
     "rimraf": "^2.5.2"