Initial ES2015ification

.travis.yml

@@ -1,8 +1,6 @@
 sudo: false
 language: node_js
 node_js:
-  - 0.10
-  - 0.12
   - 4
   - 6
   - node

benchmark/module.js

@@ -1,8 +1,8 @@
 /* global suite, bench */
 'use strict';
 
-suite('yeoman-generator module', function () {
-  bench('require', function () {
+suite('yeoman-generator module', () => {
+  bench('require', () => {
     require('..'); // eslint-disable-line import/no-unassigned-import
     delete require.cache[require.resolve('..')];
   });

gulpfile.js

@@ -1,40 +1,40 @@
 'use strict';
-var path = require('path');
-var gulp = require('gulp');
-var mocha = require('gulp-mocha');
-var istanbul = require('gulp-istanbul');
-var nsp = require('gulp-nsp');
-var plumber = require('gulp-plumber');
-var coveralls = require('gulp-coveralls');
+const path = require('path');
+const gulp = require('gulp');
+const mocha = require('gulp-mocha');
+const istanbul = require('gulp-istanbul');
+const nsp = require('gulp-nsp');
+const plumber = require('gulp-plumber');
+const coveralls = require('gulp-coveralls');
 
-gulp.task('nsp', function (cb) {
+gulp.task('nsp', cb => {
   nsp({package: path.resolve('package.json')}, cb);
 });
 
-gulp.task('pre-test', function () {
+gulp.task('pre-test', () => {
   return gulp.src([
     'lib/**/*.js'
   ])
     .pipe(istanbul({includeUntested: true}))
     .pipe(istanbul.hookRequire());
 });
 
-gulp.task('test', ['pre-test'], function (cb) {
-  var mochaErr;
+gulp.task('test', ['pre-test'], cb => {
+  let mochaErr;
 
   gulp.src('test/*.js')
     .pipe(plumber())
     .pipe(mocha({reporter: 'spec', timeout: 3000}))
-    .on('error', function (err) {
+    .on('error', err => {
       mochaErr = err;
     })
     .pipe(istanbul.writeReports())
-    .on('end', function () {
+    .on('end', () => {
       cb(mochaErr);
     });
 });
 
-gulp.task('coveralls', ['test'], function () {
+gulp.task('coveralls', ['test'], () => {
   if (!process.env.CI) {
     return;
   }

lib/actions/help.js

@@ -1,25 +1,25 @@
 'use strict';
-var path = require('path');
-var fs = require('fs');
-var _ = require('lodash');
-var table = require('text-table');
-var pathExists = require('path-exists');
+const path = require('path');
+const fs = require('fs');
+const _ = require('lodash');
+const table = require('text-table');
+const pathExists = require('path-exists');
 
 /**
  * @mixin
  * @alias actions/help
  */
-var help = module.exports;
+const help = module.exports;
 
 /**
  * Tries to get the description from a USAGE file one folder above the
  * source root otherwise uses a default description.
  */
 
 help.help = function () {
-  var filepath = path.join(this.sourceRoot(), '../USAGE');
-  var exists = pathExists.sync(filepath);
-  var out = [
+  const filepath = path.join(this.sourceRoot(), '../USAGE');
+  const exists = pathExists.sync(filepath);
+  let out = [
     'Usage:',
     '  ' + this.usage(),
     ''
@@ -52,7 +52,7 @@ help.help = function () {
 };
 
 function formatArg(config) {
-  var arg = '<' + config.name + '>';
+  let arg = '<' + config.name + '>';
 
   if (!config.required) {
     arg = '[' + arg + ']';
@@ -67,16 +67,16 @@ function formatArg(config) {
  */
 
 help.usage = function () {
-  var options = Object.keys(this._options).length ? '[options]' : '';
-  var name = ' ' + this.options.namespace;
-  var args = '';
+  const options = Object.keys(this._options).length ? '[options]' : '';
+  let name = ' ' + this.options.namespace;
+  let args = '';
 
   if (this._arguments.length > 0) {
     args = this._arguments.map(formatArg).join(' ');
   }
 
   name = name.replace(/^yeoman:/, '');
-  var out = 'yo' + name + ' ' + options + ' ' + args;
+  let out = 'yo' + name + ' ' + options + ' ' + args;
 
   if (this.description) {
     out += '\n\n' + this.description;
@@ -101,7 +101,7 @@ help.desc = function (description) {
  * @returns {String} Text of options in formatted table
  */
 help.argumentsHelp = function () {
-  var rows = this._arguments.map(function (config) {
+  const rows = this._arguments.map(config => {
     return [
       '',
       config.name ? config.name : '',
@@ -119,11 +119,11 @@ help.argumentsHelp = function () {
  * @returns {String} Text of options in formatted table
  */
 help.optionsHelp = function () {
-  var options = _.reject(this._options, function (el) {
+  const options = _.reject(this._options, el => {
     return el.hide;
   });
 
-  var rows = options.map(function (opt) {
+  const rows = options.map(opt => {
     return [
       '',
       opt.alias ? '-' + opt.alias + ', ' : '',

lib/actions/install.js

@@ -1,15 +1,15 @@
 'use strict';
-var assert = require('assert');
-var _ = require('lodash');
-var dargs = require('dargs');
-var async = require('async');
-var chalk = require('chalk');
+const assert = require('assert');
+const _ = require('lodash');
+const dargs = require('dargs');
+const async = require('async');
+const chalk = require('chalk');
 
 /**
  * @mixin
  * @alias actions/install
  */
-var install = module.exports;
+const install = module.exports;
 
 /**
  * Combine package manager cmd line arguments and run the `install` command.
@@ -36,7 +36,7 @@ install.runInstall = function (installer, paths, options, cb, spawnOptions) {
   cb = cb || function () {};
   paths = Array.isArray(paths) ? paths : (paths && paths.split(' ')) || [];
 
-  var args = ['install'].concat(paths).concat(dargs(options));
+  let args = ['install'].concat(paths).concat(dargs(options));
 
   // Yarn uses the `add` command to specifically add a package to a project.
   if (installer === 'yarn' && paths.length > 0) {
@@ -54,22 +54,22 @@ install.runInstall = function (installer, paths, options, cb, spawnOptions) {
     return this;
   }
 
-  this.env.runLoop.add('install', function (done) {
+  this.env.runLoop.add('install', done => {
     this.emit(installer + 'Install', paths);
     this.spawnCommand(installer, args, spawnOptions)
-      .on('error', function (err) {
+      .on('error', err => {
         console.log(chalk.red('Could not finish installation. \n') +
           'Please install ' + installer + ' with ' +
           chalk.yellow('npm install -g ' + installer) + ' and try again.'
         );
         cb(err);
       })
-      .on('exit', function (err) {
+      .on('exit', err => {
         this.emit(installer + 'Install:end', paths);
         cb(err);
         done();
-      }.bind(this));
-  }.bind(this), {once: installer + ' ' + args.join(' '), run: false});
+      });
+  }, {once: installer + ' ' + args.join(' '), run: false});
 
   return this;
 };
@@ -97,8 +97,8 @@ install.runInstall = function (installer, paths, options, cb, spawnOptions) {
 
 install.installDependencies = function (options) {
   options = options || {};
-  var commands = [];
-  var msg = {
+  const commands = [];
+  const msg = {
     commands: [],
     template: _.template('\n\nI\'m all done. ' +
     '<%= skipInstall ? "Just run" : "Running" %> <%= commands %> ' +
@@ -114,29 +114,29 @@ install.installDependencies = function (options) {
 
   if (options.npm !== false) {
     msg.commands.push('npm install');
-    commands.push(function (cb) {
+    commands.push(cb => {
       this.npmInstall(null, null, cb);
-    }.bind(this));
+    });
   }
 
   if (options.yarn === true) {
     msg.commands.push('yarn install');
-    commands.push(function (cb) {
+    commands.push(cb => {
       this.yarnInstall(null, null, cb);
-    }.bind(this));
+    });
   }
 
   if (options.bower !== false) {
     msg.commands.push('bower install');
-    commands.push(function (cb) {
+    commands.push(cb => {
       this.bowerInstall(null, null, cb);
-    }.bind(this));
+    });
   }
 
   assert(msg.commands.length, 'installDependencies needs at least one of `npm`, `bower` or `yarn` to run.');
 
   if (!options.skipMessage) {
-    var tplValues = _.extend({
+    const tplValues = _.extend({
       skipInstall: false
     }, this.options, {
       commands: chalk.yellow.bold(msg.commands.join(' && '))

lib/actions/spawn-command.js

@@ -1,12 +1,12 @@
 'use strict';
-var _ = require('lodash');
-var spawn = require('cross-spawn');
+const _ = require('lodash');
+const spawn = require('cross-spawn');
 
 /**
  * @mixin
  * @alias actions/spawn-command
  */
-var spawnCommand = module.exports;
+const spawnCommand = module.exports;
 
 /**
  * Normalize a command across OS and spawn it (asynchronously).

lib/actions/user.js

@@ -1,15 +1,15 @@
 'use strict';
-var shell = require('shelljs');
-var githubUsername = require('github-username');
+const shell = require('shelljs');
+const githubUsername = require('github-username');
 
-var nameCache = {};
-var emailCache = {};
+const nameCache = {};
+const emailCache = {};
 
 /**
  * @mixin
  * @alias actions/user
  */
-var user = module.exports;
+const user = module.exports;
 
 user.git = {};
 user.github = {};
@@ -20,7 +20,7 @@ user.github = {};
  */
 
 user.git.name = function () {
-  var name = nameCache[process.cwd()];
+  let name = nameCache[process.cwd()];
 
   if (name) {
     return name;
@@ -40,7 +40,7 @@ user.git.name = function () {
  */
 
 user.git.email = function () {
-  var email = emailCache[process.cwd()];
+  let email = emailCache[process.cwd()];
 
   if (email) {
     return email;
@@ -59,7 +59,7 @@ user.git.email = function () {
  */
 
 user.github.username = function (cb) {
-  var promise = githubUsername(user.git.email());
+  const promise = githubUsername(user.git.email());
 
   if (cb) {
     promise.then(