replace xtend with object.assign(...) (#59)

bin.js

@@ -3,7 +3,6 @@
 var path = require('path')
 var log = require('npmlog')
 var fs = require('fs')
-var extend = require('xtend')
 
 var pkg = require(path.resolve('package.json'))
 var rc = require('./rc')(pkg)
@@ -35,7 +34,7 @@ if (rc.help) {
 
 log.info('begin', 'Prebuild-install version', prebuildClientVersion)
 
-var opts = extend(rc, {pkg: pkg, log: log})
+var opts = Object.assign({}, rc, {pkg: pkg, log: log})
 
 var execPath = process.env.npm_execpath || process.env.NPM_CLI_JS
 

download.js

@@ -3,8 +3,7 @@ var fs = require('fs')
 var get = require('simple-get')
 var pump = require('pump')
 var tfs = require('tar-fs')
-var extend = require('xtend')
-var noop = extend({
+var noop = Object.assign({
   http: function () {},
   silly: function () {}
 }, require('noop-logger'))

package.json

@@ -32,8 +32,7 @@
     "rc": "^1.1.6",
     "simple-get": "^2.7.0",
     "tar-fs": "^1.13.0",
-    "tunnel-agent": "^0.6.0",
-    "xtend": "4.0.1"
+    "tunnel-agent": "^0.6.0"
   },
   "devDependencies": {
     "a-native-module": "^1.0.0",

test/rc-test.js

@@ -1,7 +1,6 @@
 var test = require('tape')
 var path = require('path')
 var exec = require('child_process').exec
-var xtend = require('xtend')
 
 test('custom config and aliases', function (t) {
   var args = [
@@ -103,7 +102,7 @@ test('use default ABI', function (t) {
 
 function runRc (t, args, env, cb) {
   var cmd = 'node ' + path.resolve(__dirname, '..', 'rc.js') + ' ' + args
-  env = xtend(process.env, env)
+  env = Object.assign({}, process.env, env)
   exec(cmd, { env: env }, function (err, stdout, stderr) {
     t.error(err, 'no error')
     t.equal(stderr.length, 0, 'no stderr')

test/util-test.js

@@ -3,7 +3,6 @@ var fs = require('fs')
 var home = require('os-homedir')
 var util = require('../util')
 var path = require('path')
-var xtend = require('xtend')
 
 test('prebuildCache() for different environments', function (t) {
   var NPMCACHE = process.env.npm_config_cache
@@ -77,7 +76,7 @@ test('urlTemplate() returns different templates based on pkg and rc', function (
   var t6 = util.urlTemplate(o6)
   t.equal(t6, 'http://foo.com/w00t/{name}-{major}.{minor}-{runtime}-v{abi}-{platform}-{arch}.tar.gz', 'pkg.binary.package_name is added after host and remote_path, custom format')
   var o7 = {
-    pkg: xtend(require('../package.json')),
+    pkg: require('../package.json'),
     download: true
   }
   delete o7.binary
@@ -87,7 +86,7 @@ test('urlTemplate() returns different templates based on pkg and rc', function (
   delete process.env[envProperty]
   t.equal(t7, 'http://overriden-url.com/overriden-path/v{version}/{name}-v{version}-{runtime}-v{abi}-{platform}{libc}-{arch}.tar.gz', '--download with host mirror override')
   var o8 = {
-    pkg: xtend(require('../package.json'), {
+    pkg: Object.assign({}, require('../package.json'), {
       binary: {
         host: 'http://foo.com',
         remote_path: 'w00t',