Use ES6 in lib files.

lib/common/file.js

@@ -1,11 +1,11 @@
 'use strict';
 
-var _ = require('lodash'),
-    fs = require('fs-extra'),
-    glob = require('glob'),
-    path = require('path');
+const _ = require('lodash');
+const fs = require('fs-extra');
+const glob = require('glob');
+const path = require('path');
 
-var minify = require('../common/minify.js');
+const minify = require('../common/minify.js');
 
 /*----------------------------------------------------------------------------*/
 
@@ -30,8 +30,8 @@ function copy(srcPath, destPath) {
  * @returns {Object} Returns the object of compiled templates.
  */
 function globTemplate(pattern) {
-  return _.transform(glob.sync(pattern), function(result, filePath) {
-    var key = path.basename(filePath, path.extname(filePath));
+  return _.transform(glob.sync(pattern), (result, filePath) => {
+    const key = path.basename(filePath, path.extname(filePath));
     result[key] = _.template(fs.readFileSync(filePath, 'utf8'));
   }, {});
 }
@@ -64,8 +64,8 @@ function write(destPath, data) {
 /*----------------------------------------------------------------------------*/
 
 module.exports = {
-  'copy': copy,
-  'globTemplate': globTemplate,
-  'min': min,
-  'write': write
+  copy,
+  globTemplate,
+  min,
+  write
 };

lib/common/mapping.js

@@ -1,8 +1,8 @@
 'use strict';
 
-var _mapping = require('../../fp/_mapping'),
-    util = require('./util'),
-    Hash = util.Hash;
+const _mapping = require('../../fp/_mapping');
+const util = require('./util');
+const Hash = util.Hash;
 
 /*----------------------------------------------------------------------------*/
 

lib/common/minify.js

@@ -1,10 +1,10 @@
 'use strict';
 
-var _ = require('lodash'),
-    fs = require('fs-extra'),
-    uglify = require('uglify-js');
+const _ = require('lodash');
+const fs = require('fs-extra');
+const uglify = require('uglify-js');
 
-var uglifyOptions = require('./uglify.options');
+const uglifyOptions = require('./uglify.options');
 
 /*----------------------------------------------------------------------------*/
 
@@ -32,7 +32,7 @@ function minify(srcPath, destPath, callback, options) {
   if (!destPath) {
     destPath = srcPath.replace(/(?=\.js$)/, '.min');
   }
-  var output = uglify.minify(srcPath, _.defaults(options || {}, uglifyOptions));
+  const output = uglify.minify(srcPath, _.defaults(options || {}, uglifyOptions));
   fs.writeFile(destPath, output.code, 'utf-8', callback);
 }
 

lib/common/util.js

@@ -1,6 +1,6 @@
 'use strict';
 
-var _ = require('lodash');
+const _ = require('lodash');
 
 /*----------------------------------------------------------------------------*/
 
@@ -13,7 +13,7 @@ var _ = require('lodash');
  * @returns {Object} Returns the new hash object.
  */
 function Hash(properties) {
-  return _.transform(properties, function(result, value, key) {
+  return _.transform(properties, (result, value, key) => {
     result[key] = (_.isPlainObject(value) && !(value instanceof Hash))
       ? new Hash(value)
       : value;
@@ -35,6 +35,6 @@ function pitch(error) {
 }
 
 module.exports = {
-  'Hash': Hash,
-  'pitch': pitch
+  Hash,
+  pitch
 };