Es6 refactor

.eslintrc

@@ -1,18 +1,34 @@
 {
-  "parser": "babel-eslint",
-  "extends": "eslint-config-postcss",
+  "env": {
+    "es6": true,
+    "mocha": true,
+    "node": true
+  },
   "rules": {
-    "consistent-return": [0],
-    "complexity":        [0],
-    "space-before-function-paren": [0],
-    "indent": [2, 2, {"SwitchCase": 1}],
-    "max-len": [1, 1000],
-    "brace-style": [2, "stroustrup", { "allowSingleLine": true }],
-    "space-unary-ops": [0],
-    "no-extra-parens": [0],
-    "no-bitwise": [0]
+    "brace-style": ["error", "stroustrup", { "allowSingleLine": false }],
+    "consistent-return": ["off"],
+    "comma-spacing": ["error", { "before": false, "after": true }],
+    "complexity": ["off"],
+    "indent": ["error", 2, { "SwitchCase": 1, "VariableDeclarator": 1 }],
+    "keyword-spacing": ["error", { "after": true }],
+    "max-len": ["warn", 1000],
+    "no-bitwise": ["off"],
+    "no-console": ["off"],
+    "no-extra-parens": ["off"],
+    "one-var": ["error", {
+      "var": "always",
+      "let": "always",
+      "const": "never"
+    }],
+    "prefer-arrow-callback": ["error", { "allowNamedFunctions": true }],
+    "semi": ["error", "always"],
+    "space-before-function-paren": ["error", "always"],
+    "space-infix-ops": ["error", { "int32Hint": false }],
+    "space-in-parens": ["error", "never"],
+    "space-unary-ops": ["off"],
+    "strict": ["error", "safe"]
   },
-  "env": {
-    "mocha": true
+  "parserOptions": {
+    "ecmaVersion": 8
   }
 }

.npmignore

@@ -1,4 +1,3 @@
-.babelrc
 .editorconfig
 .eslintrc
 .gitignore
@@ -11,4 +10,4 @@ build/
 coverage/
 test/
 
-gulpfile.babel.js
+gulpfile.js

.travis.yml

@@ -1,4 +1,6 @@
 language: node_js
 node_js:
-  - 5
   - 4
+  - 5
+  - 6
+  - 7

gulpfile.js

@@ -0,0 +1,31 @@
+'use strict';
+
+const eslint = require('gulp-eslint');
+const gulp = require('gulp');
+const mocha = require('gulp-mocha');
+
+gulp.task('lint', () => {
+  let glob = [
+    '*.js',
+    'lib/*.js',
+    'test/*.js'
+  ];
+
+  return gulp.src(glob)
+          .pipe(eslint())
+          .pipe(eslint.format())
+          .pipe(eslint.failAfterError());
+});
+
+gulp.task('test', ['lint'], () => {
+  let glob = [
+    'test/*.js',
+    '!test/parser.js',
+    '!test/tokenize.js'
+  ];
+
+  return gulp.src(glob, { read: false })
+    .pipe(mocha());
+});
+
+gulp.task('default', ['test']);

lib/atword.js

@@ -0,0 +1,14 @@
+'use strict';
+
+const Container = require('./container');
+
+class AtWord extends Container {
+  constructor (opts) {
+    super(opts);
+    this.type = 'atword';
+  }
+}
+
+Container.registerWalker(AtWord);
+
+module.exports = AtWord;

lib/colon.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const Container = require('./container');
+const Node = require('./node');
+
+class Colon extends Node {
+  constructor (opts) {
+    super(opts);
+    this.type = 'colon';
+  }
+}
+
+Container.registerWalker(Colon);
+
+module.exports = Colon;

lib/comma.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const Container = require('./container');
+const Node = require('./node');
+
+class Comma extends Node {
+  constructor (opts) {
+    super(opts);
+    this.type = 'comma';
+  }
+}
+
+Container.registerWalker(Comma);
+
+module.exports = Comma;

lib/comment.es6 → lib/comment.js

@@ -1,7 +1,9 @@
-import Container from './container';
-import Node from './node';
+'use strict';
 
-export default class Comment extends Node {
+const Container = require('./container');
+const Node = require('./node');
+
+class Comment extends Node {
   constructor (opts) {
     super(opts);
     this.type = 'comment';
@@ -16,6 +18,8 @@ export default class Comment extends Node {
       this.raws.after
     ].join('');
   }
-}
+};
 
 Container.registerWalker(Comment);
+
+module.exports = Comment;