[breaking] ES2015ify and require Node.js 4

.gitattributes

@@ -1 +1,2 @@
 * text=auto
+*.js text eol=lf

.travis.yml

@@ -2,5 +2,3 @@ language: node_js
 node_js:
   - '6'
   - '4'
-  - '0.12'
-  - '0.10'

index.js

@@ -1,62 +1,48 @@
 'use strict';
-var findUp = require('find-up');
-var loadJsonFile = require('load-json-file');
-var objectAssign = require('object-assign');
-var Symbol = require('symbol');
-var fpSymbol = Symbol('package.json filepath');
+const findUp = require('find-up');
+const loadJsonFile = require('load-json-file');
+
+const fpSymbol = Symbol('package.json filepath');
 
 function addFp(x, fp) {
 	x[fpSymbol] = fp;
 	return x;
 }
 
-module.exports = function (namespace, opts) {
-	// legacy
-	if (typeof opts === 'string') {
-		opts = {cwd: opts};
+module.exports = (namespace, opts) => {
+	if (!namespace) {
+		return Promise.reject(new TypeError('Expected a namespace'));
 	}
 
 	opts = opts || {};
 
-	return findUp('package.json', {cwd: opts.cwd})
-		.then(function (fp) {
-			if (!namespace) {
-				throw new TypeError('Expected a namespace');
-			}
-
+	return findUp('package.json', opts.cwd ? {cwd: opts.cwd} : {})
+		.then(fp => {
 			if (!fp) {
-				return addFp(objectAssign({}, opts.defaults), fp);
+				return addFp(Object.assign({}, opts.defaults), fp);
 			}
 
-			return loadJsonFile(fp).then(function (pkg) {
-				return addFp(objectAssign({}, opts.defaults, pkg[namespace]), fp);
-			});
+			return loadJsonFile(fp).then(pkg =>
+				addFp(Object.assign({}, opts.defaults, pkg[namespace]), fp));
 		});
 };
 
-module.exports.sync = function (namespace, opts) {
+module.exports.sync = (namespace, opts) => {
 	if (!namespace) {
 		throw new TypeError('Expected a namespace');
 	}
 
-	// legacy
-	if (typeof opts === 'string') {
-		opts = {cwd: opts};
-	}
-
 	opts = opts || {};
 
-	var fp = findUp.sync('package.json', {cwd: opts.cwd});
+	const fp = findUp.sync('package.json', opts.cwd ? {cwd: opts.cwd} : {});
 
 	if (!fp) {
-		return addFp(objectAssign({}, opts.defaults), fp);
+		return addFp(Object.assign({}, opts.defaults), fp);
 	}
 
-	var pkg = loadJsonFile.sync(fp);
+	const pkg = loadJsonFile.sync(fp);
 
-	return addFp(objectAssign({}, opts.defaults, pkg[namespace]), fp);
+	return addFp(Object.assign({}, opts.defaults, pkg[namespace]), fp);
 };
 
-module.exports.filepath = function (conf) {
-	return conf[fpSymbol];
-};
+module.exports.filepath = conf => conf[fpSymbol];

package.json

@@ -10,7 +10,7 @@
     "url": "sindresorhus.com"
   },
   "engines": {
-    "node": ">=0.10.0"
+    "node": ">=4"
   },
   "scripts": {
     "test": "xo && ava"
@@ -36,15 +36,16 @@
     "namespaced"
   ],
   "dependencies": {
-    "find-up": "^1.0.0",
-    "load-json-file": "^1.1.0",
-    "object-assign": "^4.0.1",
-    "symbol": "^0.2.1"
+    "find-up": "^2.0.0",
+    "load-json-file": "^2.0.0"
   },
   "devDependencies": {
     "ava": "*",
     "xo": "*"
   },
+  "xo": {
+    "esnext": true
+  },
   "fixture": {
     "foo": true
   }

readme.md

@@ -2,7 +2,7 @@
 
 > Get namespaced config from the closest package.json
 
-Having tool specific config in package.json reduces the amount of metafiles in your repo (there are usually a lot!) and makes the config obvious compared to hidden dotfiles like `.jshintrc`, which can end up causing confusion. [XO](https://github.com/sindresorhus/xo), for example, use the `xo` namespace in package.json, and [ESLint](http://eslint.org) uses `eslintConfig`. Many more tools supports this, like [AVA](https://ava.li), [Babel](https://babeljs.io), [nyc](https://github.com/bcoe/nyc), etc.
+Having tool specific config in package.json reduces the amount of metafiles in your repo (there are usually a lot!) and makes the config obvious compared to hidden dotfiles like `.eslintrc`, which can end up causing confusion. [XO](https://github.com/sindresorhus/xo), for example, uses the `xo` namespace in package.json, and [ESLint](http://eslint.org) uses `eslintConfig`. Many more tools supports this, like [AVA](https://ava.li), [Babel](https://babeljs.io), [nyc](https://github.com/istanbuljs/nyc), etc.
 
 
 ## Install
@@ -40,7 +40,7 @@ It [walks up](https://github.com/sindresorhus/find-up) parent directories until
 
 ### pkgConf(namespace, [options])
 
-Returns a promise that resolves to the config.
+Returns a `Promise` for the config.
 
 ### pkgConf.sync(namespace, [options])
 
@@ -71,7 +71,7 @@ Default config.
 
 Pass in the `config` returned from any of the above methods.
 
-Returns the filepath to the package.json file or `null`.
+Returns the filepath to the package.json file or `null` when not found.
 
 
 ## Related

test.js

@@ -1,37 +1,37 @@
 import path from 'path';
 import test from 'ava';
-import fn from './';
+import m from './';
 
 const cwd = path.join(__dirname, 'fixture');
 const pkgPath = path.join(__dirname, 'package.json');
 
 test('async', async t => {
-	const x = await fn('fixture', {cwd});
+	const x = await m('fixture', {cwd});
 	t.true(x.foo);
-	t.is(fn.filepath(x), pkgPath);
+	t.is(m.filepath(x), pkgPath);
 });
 
 test('async - non-existent namespace', async t => {
-	const x = await fn('noop', {cwd});
+	const x = await m('noop', {cwd});
 	t.is(typeof x, 'object');
 });
 
 test('sync', t => {
-	const x = fn.sync('fixture', {cwd});
+	const x = m.sync('fixture', {cwd});
 	t.true(x.foo);
-	t.is(fn.filepath(x), pkgPath);
+	t.is(m.filepath(x), pkgPath);
 });
 
 test('sync - non-existent namespace', t => {
-	const x = fn.sync('noop', {cwd});
+	const x = m.sync('noop', {cwd});
 	t.is(typeof x, 'object');
 });
 
 test('defaults option', t => {
-	const x = fn.sync('fixture', {cwd, defaults: {bar: false}});
+	const x = m.sync('fixture', {cwd, defaults: {bar: false}});
 	t.true(x.foo);
 	t.false(x.bar);
 
-	const x2 = fn.sync('noop', {defaults: {unicorn: true}});
+	const x2 = m.sync('noop', {defaults: {unicorn: true}});
 	t.true(x2.unicorn);
 });