chore(release): 6.4.2 [skip ci]

## [6.4.2](https://github.com/harttle/liquidjs/compare/v6.4.1...v6.4.2) (2019-01-28)

### Bug Fixes

* **CI:** e2e not building cjs ([dde7b3b](https://github.com/harttle/liquidjs/commit/dde7b3b))

.eslintignore

@@ -0,0 +1,4 @@
+node_modules
+dist
+build
+coverage

.eslintrc.json

@@ -1,11 +1,16 @@
 {
   "extends": "standard",
   "env": {
+    "es6": true,
     "browser": true,
     "node": true
   },
   "plugins": [
     "standard",
     "promise"
-  ]
+  ],
+  "rules": {
+    "no-var": 2,
+    "prefer-const": 2
+  }
 }

.gitignore

@@ -1,41 +1,14 @@
-# Logs
-logs
+# logs
 *.log
 npm-debug.log*
 
-# Runtime data
-pids
-*.pid
-*.seed
+# tests
+coverage/
+.nyc_output/
 
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
+# modules
+node_modules/
+build/
 
-# Coverage directory used by tools like istanbul
-coverage
-
-# nyc test coverage
-.nyc_output
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# node-waf configuration
-.lock-wscript
-
-# Compiled binary addons (http://nodejs.org/api/addons.html)
-build/Release
-
-# Dependency directories
-node_modules
-jspm_packages
-
-# Optional npm cache directory
-.npm
-
-# Optional REPL history
-.node_repl_history
-
-# vim
+# editors
 .*.swp
-package-lock.json

.npmignore

@@ -1 +1,3 @@
-test/
+/coverage
+/test
+.*

.travis.yml

@@ -1,9 +1,19 @@
 language: node_js
 node_js:
-  - "node"
-  - "lts/*"
+  - "8"
+  - "6"
   - "4"
-before_script:
-  - npm install -g mocha
-after_script: 
-  - npm run lcov && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage
+jobs:
+  include:
+    - stage: test
+      name: 'Linting'
+      script: npm run lint
+    - name: 'Coverage'
+      script: npm run coverage && npm run coveralls
+    - stage: release
+      if: branch = master
+      script: skip
+      deploy:
+        provider: script
+        skip_cleanup: true
+        script: npx semantic-release

CHANGELOG.md

@@ -0,0 +1,13 @@
+## [6.4.2](https://github.com/harttle/liquidjs/compare/v6.4.1...v6.4.2) (2019-01-28)
+
+
+### Bug Fixes
+
+* **CI:** e2e not building cjs ([dde7b3b](https://github.com/harttle/liquidjs/commit/dde7b3b))
+
+## [6.4.1](https://github.com/harttle/liquidjs/compare/v6.4.0...v6.4.1) (2019-01-28)
+
+
+### Bug Fixes
+
+* regenerator undefined ([a2caeb5](https://github.com/harttle/liquidjs/commit/a2caeb5))

README.md

@@ -1,59 +1,83 @@
 # liquidjs
 
 [![npm](https://img.shields.io/npm/v/liquidjs.svg)](https://www.npmjs.org/package/liquidjs)
+[![npm](https://img.shields.io/npm/dm/liquidjs.svg)](https://www.npmjs.org/package/liquidjs)
 [![Build Status](https://travis-ci.org/harttle/liquidjs.svg?branch=master)](https://travis-ci.org/harttle/liquidjs)
 [![Coveralls](https://img.shields.io/coveralls/harttle/liquidjs.svg)](https://coveralls.io/github/harttle/liquidjs?branch=master)
 [![GitHub issues](https://img.shields.io/github/issues-closed/harttle/liquidjs.svg)](https://github.com/harttle/liquidjs/issues)
+[![GitHub contributors](https://img.shields.io/github/contributors/harttle/liquidjs.svg)](https://github.com/harttle/liquidjs/graphs/contributors)
+[![David](https://img.shields.io/david/harttle/liquidjs.svg)](https://david-dm.org/harttle/liquidjs)
+[![David Dev](https://img.shields.io/david/dev/harttle/liquidjs.svg)](https://david-dm.org/harttle/liquidjs?type=dev)
+[![DUB](https://img.shields.io/dub/l/vibe-d.svg)](https://github.com/harttle/liquidjs/blob/master/LICENSE)
+[![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://github.com/harttle/liquidjs)
+[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/harttle/liquidjs)
 
-A Liquid engine implementation for both Node.js and browsers, with all [shopify/liquid][shopify/liquid] features.
-Formerly known as shopify-liquid. 
+This is a liquid implementation for both Node.js and browsers. Website: <http://harttle.github.io/liquidjs/>, Live Demo: <https://jsfiddle.net/6u40xbzs/> 
 
-Live Demo: <http://harttle.com/liquidjs/>
+**Features**
 
-> The Liquid template engine is implemented in Ruby originally, 
-> which is used by [Jekyll][jekyll] and [Github Pages][gh].
+* Fully compatible to [shopify][shopify/liquid], with all [tags][tags] and [filters][filters] implemented
+* Support layout(extend) and include syntax
+* In pure JavaScript with Promise-based API
 
-Features:
+**Differences**
 
-* A wide range of [filters](https://github.com/harttle/liquidjs/wiki/Builtin-Filters) and [tags](https://github.com/harttle/liquidjs/wiki/Builtin-Tags)
-* Easy tag/filter registration, allows async tags
-* [any-promise][any-promise]
+Though being compatible with [Ruby Liquid](https://github.com/shopify/liquid) is one of our priorities, there're still certain differences. You may need some configuration to get it compatible in these senarios:
 
-API Reference:
+* Dynamic file locating (enabled by default), which means layout/partial name can be an variable in liquidjs. See [#51](https://github.com/harttle/liquidjs/issues/51).
+* Truthy and Falsy. All values except `undefined`, `null`, `false` are truthy, whereas in Ruby Liquid all except `nil` and `false` are truthy. See [#26](https://github.com/harttle/liquidjs/pull/26).
+* Number Rendering. Since JavaScript do not distinguish `float` and `integer`, we cannot either convert between them nor render regarding to their type. See [#59](https://github.com/harttle/liquidjs/issues/59).
+* [.to_liquid()](https://github.com/Shopify/liquid/wiki/Introduction-to-Drops) has a `.toLiquid()` alias and and the JavaScript `.toString()` is aliased to `.to_s()`.
+* [.to_s()](https://www.rubydoc.info/gems/liquid/Liquid/Drop) uses `JSON.prototype.stringify` as default, rather than Ruby's inspect.
 
-* Builtin Tags: <https://github.com/harttle/liquidjs/wiki/Builtin-Tags>
-* Builtin Filters: <https://github.com/harttle/liquidjs/wiki/Builtin-Filters>
-* Operators: <https://github.com/harttle/liquidjs/wiki/Operators>
-* Whitespace Control: <https://github.com/harttle/liquidjs/wiki/Whitespace-Control>
+## TOC
 
-Installation:
-
-```bash
-npm install --save liquidjs
-```
+* Usage
+    * [Render from String](#render-from-string)
+    * [Render from File](#render-from-file)
+    * [Use with Express.js](#use-with-expressjs)
+    * [Use in Browser](#use-in-browser)
+    * [Include Partials](#include-partials)
+    * [Layout Templates (Extends)](#layout-templates-extends)
+* API Spec
+    * [Constructor Options](#options)
+    * [Register Filters](#register-filters), [Builtin Filters](https://github.com/harttle/liquidjs/wiki/Builtin-Filters)
+    * [Register Tags](#register-tags), [Builtin Tags](https://github.com/harttle/liquidjs/wiki/Builtin-Tags)
+    * [Operators](https://github.com/harttle/liquidjs/wiki/Operators)
+    * [Whitespace Control](https://github.com/harttle/liquidjs/wiki/Whitespace-Control)
+* [Contribute Guidelines](#contribute-guidelines)
 
 ## Render from String
 
+Install as Node.js dependency:
+
+```bash
+# You'll need a promise-polyfill for Node.js < 4
+npm install --save liquidjs
+```
+
 Parse and Render:
 
 ```javascript
 var Liquid = require('liquidjs');
 var engine = Liquid();
 
-engine.parseAndRender('{{name | capitalize}}', {name: 'alice'})
-    .then(function(html){
-        // html === 'Alice'
-    });
+engine
+    .parseAndRender('{{name | capitalize}}', {name: 'alice'})
+    .then(console.log);
+
+// outputs 'Alice'
 ```
 
 Caching templates:
 
 ```javascript
 var tpl = engine.parse('{{name | capitalize}}');
-engine.render(tpl, {name: 'alice'})
-    .then(function(html){   
-        // html === 'Alice'
-    });
+engine
+    .render(tpl, {name: 'alice'})
+    .then(console.log);
+
+// outputs 'Alice'
 ```
 
 ## Render from File
@@ -61,47 +85,17 @@ engine.render(tpl, {name: 'alice'})
 ```javascript
 var engine = Liquid({
     root: path.resolve(__dirname, 'views/'),  // dirs to lookup layouts/includes
-    extname: '.liquid'          // the default extname used for layouts/includes
+    extname: '.liquid'          // the extname used for layouts/includes, defaults ""
 });
 engine.renderFile("hello.liquid", {name: 'alice'})
-    .then(function(html){
-       // html === 'Alice'
-    });
-// equivalent to: 
-engine.renderFile("hello", {name: 'alice'})
-    .then(function(html){
-       // html === 'Alice'
-    });
+    .then(console.log)  // outputs "Alice"
+
+// which is equivalent to: 
+engine
+    .renderFile("hello", {name: 'alice'})
+    .then(console.log)  // outputs "Alice"
 ```
 
-## Options
-
-The full list of options for `Liquid()` is listed as following:
-
-* `root` is a directory or an array of directories to resolve layouts and includes, as well as the filename passed in when calling `.renderFile()`.
-If an array, the files are looked up in the order they occur in the array.
-Defaults to `["."]`
-
-* `extname` is used to lookup the template file when filepath doesn't include an extension name. Eg: setting to `".html"` will allow including file by basename. Defaults to `""`.
-
-* `cache` indicates whether or not to cache resolved templates. Defaults to `false`.
-
-* `strict_filters` is used to enable strict filter existence. If set to `false`, undefined filters will be rendered as empty string. Otherwise, undefined filters will cause an exception. Defaults to `false`.
-
-* `strict_variables` is used to enable strict variable derivation. 
-If set to `false`, undefined variables will be rendered as empty string.
-Otherwise, undefined variables will cause an exception. Defaults to `false`.
-
-* `trim_tag_right` is used to strip blank characters (including ` `, `\t`, and `\r`) from the right of tags (`{% %}`) until `\n` (inclusive). Defaults to `false`.
-
-* `trim_tag_left` is similiar to `trim_tag_right`, whereas the `\n` is exclusive. Defaults to `false`. See [Whitespace Control][whitespace control] for details.
-
-* `trim_value_right` is used to strip blank characters (including ` `, `\t`, and `\r`) from the right of values (`{{ }}`) until `\n` (inclusive). Defaults to `false`.
-
-* `trim_value_left` is similiar to `trim_value_right`, whereas the `\n` is exclusive. Defaults to `false`. See [Whitespace Control][whitespace control] for details.
-
-* `greedy` is used to specify whether `trim_left`/`trim_right` is greedy. When set to `true`, all consecutive blank characters including `\n` will be trimed regardless of line breaks. Defaults to `true`.
-
 ## Use with Express.js
 
 ```javascript
@@ -111,41 +105,25 @@ app.set('views', './views');            // specify the views directory
 app.set('view engine', 'liquid');       // set to default
 ```
 
-> There's an Express demo [here](demo/express/).
-
-When using with Express.js, partials(includes and layouts) will be looked up in
-both Liquid `root` and Express `views` directories.
+[Here](demo/express/)'s an Express demo. When used with Express.js,
+Express [`views`][express-views] will be included when looking up
+partials(includes and layouts).
 
 ## Use in Browser
 
-[Download][releases] the dist files and import into your HTML.
-And `window.Liquid` is what you want. There's also a [demo](demo/browser/).
+You can get a dist file for browsers from
 
-```html
-<html lang="en">
-<head>
-  <script src="dist/liquid.min.js"></script>
-</head>
-<body>
-  <script>
-    var engine = window.Liquid();
-    var src = '{{ name | capitalize}}';
-    var ctx = {
-      name: 'welcome to liquidjs'
-    };
-    engine.parseAndRender(src, ctx)
-      .then(function(html) {
-        // html === Welcome to liquidjs
-      });
-  </script>
-</body>
-</html>
-```
+* [Releases][releases] page for liquidjs, or
+* unpkg.com: <https://unpkg.com/liquidjs/dist/liquid.min.js> 
 
-Note: In [IE and Android UC][caniuse-promises] browser, you need a Promise implementation
-registered to [any-promise][any-promise].
+Here's the demo:
 
-## Includes
+* JSFiddle: <https://jsfiddle.net/6u40xbzs/> 
+* Demo directory: [/demo/browser/](demo/browser/).
+
+Note: For [IE and Android UC][caniuse-promises] browser, you will need a [Promise polyfill][pp].
+
+## Include Partials
 
 ```
 // file: color.liquid
@@ -166,7 +144,7 @@ color: 'red' shape: 'circle'
 color: 'yellow' shape: 'square'
 ```
 
-## Layouts
+## Layout Templates (Extends)
 
 ```
 // file: default-layout.liquid
@@ -190,16 +168,51 @@ Footer
 * It's possible to define multiple blocks.
 * block name is optional when there's only one block.
 
+## Options
+
+The full list of options for `Liquid()` is listed as following:
+
+* `root` is a directory or an array of directories to resolve layouts and includes, as well as the filename passed in when calling `.renderFile()`.
+If an array, the files are looked up in the order they occur in the array.
+Defaults to `["."]`
+
+* `extname` is used to lookup the template file when filepath doesn't include an extension name. Eg: setting to `".html"` will allow including file by basename. Defaults to `""`.
+
+* `cache` indicates whether or not to cache resolved templates. Defaults to `false`.
+
+* `dynamicPartials`: if set, treat `<filepath>` parameter in `{%include filepath %}`, `{%layout filepath%}` as a variable, otherwise as a literal value. Defaults to `true`.
+
+* `strict_filters` is used to enable strict filter existence. If set to `false`, undefined filters will be rendered as empty string. Otherwise, undefined filters will cause an exception. Defaults to `false`.
+
+* `strict_variables` is used to enable strict variable derivation. 
+If set to `false`, undefined variables will be rendered as empty string.
+Otherwise, undefined variables will cause an exception. Defaults to `false`.
+
+* `trim_tag_right` is used to strip blank characters (including ` `, `\t`, and `\r`) from the right of tags (`{% %}`) until `\n` (inclusive). Defaults to `false`.
+
+* `trim_tag_left` is similiar to `trim_tag_right`, whereas the `\n` is exclusive. Defaults to `false`. See [Whitespace Control][whitespace control] for details.
+
+* `trim_value_right` is used to strip blank characters (including ` `, `\t`, and `\r`) from the right of values (`{{ }}`) until `\n` (inclusive). Defaults to `false`.
+
+* `trim_value_left` is similiar to `trim_value_right`, whereas the `\n` is exclusive. Defaults to `false`. See [Whitespace Control][whitespace control] for details.
+
+* `greedy` is used to specify whether `trim_left`/`trim_right` is greedy. When set to `true`, all consecutive blank characters including `\n` will be trimed regardless of line breaks. Defaults to `true`.
+
 ## Register Filters
 
 ```javascript
 // Usage: {{ name | uppper }}
-engine.registerFilter('upper', function(v){
-    return v.toUpperCase();
-});
+engine.registerFilter('upper', v => v.toUpperCase())
 ```
 
-> See existing filter implementations: <https://github.com/harttle/liquidjs/blob/master/filters.js>
+Filter arguments will be passed to the registered filter function, for example:
+
+```javascript
+// Usage: {{ 1 | add: 2, 3 }}
+engine.registerFilter('add', (initial, arg1, arg2) => initial + arg1 + arg2)
+```
+
+See existing filter implementations here: <https://github.com/harttle/liquidjs/blob/master/filters.js>
 
 ## Register Tags
 
@@ -216,13 +229,36 @@ engine.registerTag('upper', {
 });
 ```
 
-> See existing tag implementations: <https://github.com/harttle/liquidjs/blob/master/tags/>
+* `parse`: Read tokens from `remainTokens` until your end token.
+* `render`: Combine scope data with your parsed tokens into HTML string.
 
-## Contribution Guide
+See existing tag implementations here: <https://github.com/harttle/liquidjs/blob/master/tags/>
 
-1. Write a [test][test] to define the feature you want.
-2. File an issue, or optionally:
-3. Get your test pass and make a pull request.
+## Plugin API
+
+A pack of tags or filters can be encapsulated into a **plugin**, which will be typically installed via npm.
+
+```javascript
+engine.plugin(require('./some-plugin'));
+
+// some-plugin.js
+module.exports = function (Liquid) {
+    // here `this` refers to the engine instance
+    // `Liquid` provides facilities to implement tags and filters
+    this.registerFilter('foo', x => x);
+}
+```
+
+Plugin List:
+
+* To add your plugin, contact me or simply send a PR.
+
+## Contribute Guidelines
+
+This repo uses [eslint](https://eslint.org/) to check code style, [semantic-release](https://github.com/semantic-release/semantic-release) to generate changelog and publish to npm and Github Releases.
+
+* Code Style: <https://github.com/standard/eslint-config-standard>, `npm run lint` to check locally.
+* Commit Message: <https://github.com/angular/angular.js/blob/master/DEVELOPERS.md#commits>
 
 [nunjucks]: http://mozilla.github.io/nunjucks/
 [liquid-node]: https://github.com/sirlantis/liquid-node
@@ -234,3 +270,7 @@ engine.registerTag('upper', {
 [test]: https://github.com/harttle/liquidjs/tree/master/test
 [caniuse-promises]: http://caniuse.com/#feat=promises
 [whitespace control]: https://github.com/harttle/liquidjs/wiki/Whitespace-Control
+[tags]: https://github.com/harttle/liquidjs/wiki/Builtin-Tags
+[filters]: https://github.com/harttle/liquidjs/wiki/Builtin-Filters
+[express-views]: http://expressjs.com/en/guide/using-template-engines.html
+[pp]: https://github.com/taylorhakes/promise-polyfill

demo/browser/date.html

@@ -0,0 +1 @@
+access time: {{date|date: "%Y-%m-%d %H:%M:%S"}}

demo/browser/hello.html

@@ -0,0 +1 @@
+<h2>Welcome to {{ name | capitalize}}, {% include 'date.html' %}</h2>

demo/browser/index.html

@@ -1,26 +1,29 @@
 <!DOCTYPE html>
-<html lang="en">
+<html>
 
 <head>
-  <meta charset="UTF-8">
-  <title></title>
+  <title>liquidjs for the browser</title>
   <script src="../../dist/liquid.js"></script>
 </head>
 
 <body>
-  <h2 id="header"></h2>
   <script>
-    var engine = window.Liquid();
-
-    var src = 'Welcome to {{ name | capitalize}}, ' +
-      'access time: {{date|date: "%Y-%m-%d %H:%M:%S"}}';
+    var engine = window.Liquid({
+      extname: '.html',
+      cache: true
+    });
+    var src = '<h2>Welcome to {{ name | capitalize}}, ' +
+      'access time: {{date|date: "%Y-%m-%d %H:%M:%S"}}&lt;/h2>';
     var ctx = {
       name: 'Liquid',
       date: new Date()
     };
     engine.parseAndRender(src, ctx)
       .then(function(html) {
-        document.getElementById('header').innerHTML = html;
+        return engine.renderFile('hello', ctx);
+      })
+      .then(function(html) {
+        document.body.innerHTML += html
       });
   </script>
 </body>

demo/express/app.js

@@ -1,8 +1,8 @@
-var express = require('express')
-var app = express()
-var Liquid = require('../..')
+const express = require('express')
+const Liquid = require('../..')
 
-var engine = Liquid({
+let app = express()
+let engine = Liquid({
   root: __dirname, // for layouts and partials
   extname: '.liquid'
 })
@@ -12,7 +12,7 @@ app.set('views', ['./partials', './views']) // specify the views directory
 app.set('view engine', 'liquid') // set to default
 
 app.get('/', function (req, res) {
-  var todos = ['fork and clone', 'make it better', 'make a pull request']
+  let todos = ['fork and clone', 'make it better', 'make a pull request']
   res.render('todolist', {
     todos: todos,
     title: 'Welcome to liquidjs!'

demo/express/index.js

@@ -1,5 +1,5 @@
 const app = require('./app.js')
 
 app.listen(3000, function () {
-  console.log('Example app listening on port 3000!')
+  console.log('Express running: http://localhost:3000')
 })

demo/express/views/todolist.liquid

@@ -2,7 +2,7 @@
 
 <ul>
   {% for todo in todos %}
-    <li>{% include 'todo' id=forloop.index %}</li>
+    <li>{% include 'todo', id:forloop.index %}</li>
   {% endfor %}
 </ul>
 

demo/nodejs/index.js

@@ -0,0 +1,12 @@
+const Liquid = require('../..')
+
+const engine = new Liquid({
+  root: __dirname,
+  extname: '.liquid'
+})
+const ctx = {
+  todos: ['fork and clone', 'make it better', 'make a pull request'],
+  title: 'Welcome to liquidjs!'
+}
+
+engine.renderFile('todolist', ctx).then(console.log)

demo/nodejs/todolist.liquid

@@ -0,0 +1,5 @@
+<ul>
+  {% for todo in todos %}
+  <li>{{forloop.index}} - {{todo}}</li>
+  {% endfor %}
+</ul>

demo/reactjs/.gitignore

@@ -0,0 +1,21 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

demo/reactjs/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "react-liquidjs",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "dns": "^0.2.2",
+    "html-react-parser": "^0.4.7",
+    "liquidjs": "^6.0.1",
+    "path": "^0.12.7",
+    "react": "^16.5.2",
+    "react-dom": "^16.5.2",
+    "react-promise": "^2.0.3",
+    "react-scripts": "2.0.4"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  },
+  "browserslist": [
+    ">0.2%",
+    "not dead",
+    "not ie <= 11",
+    "not op_mini all"
+  ]
+}

demo/reactjs/public/index.html

@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+    <meta name="theme-color" content="#000000">
+    <!--
+      manifest.json provides metadata used when your web app is added to the
+      homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>
+      You need to enable JavaScript to run this app.
+    </noscript>
+    <div id="result"></div>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>

demo/reactjs/public/manifest.json

@@ -0,0 +1,15 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

demo/reactjs/src/App.css

@@ -0,0 +1,32 @@
+.App {
+  text-align: center;
+}
+
+.App-logo {
+  animation: App-logo-spin infinite 20s linear;
+  height: 40vmin;
+}
+
+.App-header {
+  background-color: #282c34;
+  min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  font-size: calc(10px + 2vmin);
+  color: white;
+}
+
+.App-link {
+  color: #61dafb;
+}
+
+@keyframes App-logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}

demo/reactjs/src/App.js

@@ -0,0 +1,46 @@
+import React, { Component } from 'react';
+import logo from './logo.svg';
+import './App.css';
+
+let path   = require('path')
+let Liquid = require('liquidjs'); 
+
+let config = require('./views/demo.liquid');
+let pageConfig = config.toString()
+
+let Parser = require('html-react-parser');
+
+class App extends Component {
+
+componentDidMount() {
+
+  let engine = Liquid({
+      root: path.resolve(__dirname, 'views/'),  // dirs to lookup layouts/includes
+      extname: '.liquid'     // the extname used for layouts/includes, defaults 
+  });
+
+  engine.registerFilter('image', d => {
+    let img = `<img src="${d}" class="App-logo" alt="logo"></img>`;  
+    return img 
+  })
+    
+  engine.renderFile(pageConfig, {name: 'alice', logo: logo })
+    .then((htmlTemp) => {
+      this.setState({ html: htmlTemp })
+    })  // outputs "Alice"
+}
+
+state = { 
+  html: []
+}
+
+  render() { 
+    return (
+      <div className="App">
+        {Parser(`${this.state.html}`)}
+      </div>
+    );
+  }
+}
+
+export default App;

demo/reactjs/src/App.test.js

@@ -0,0 +1,9 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+
+it('renders without crashing', () => {
+  const div = document.createElement('div');
+  ReactDOM.render(<App />, div);
+  ReactDOM.unmountComponentAtNode(div);
+});

demo/reactjs/src/index.css

@@ -0,0 +1,14 @@
+body {
+  margin: 0;
+  padding: 0;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
+    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
+    monospace;
+}

demo/reactjs/src/index.js

@@ -0,0 +1,12 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(<App />, document.getElementById('root'));
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: http://bit.ly/CRA-PWA
+serviceWorker.unregister();

demo/reactjs/src/logo.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 841.9 595.3">
+    <g fill="#61DAFB">
+        <path d="M666.3 296.5c0-32.5-40.7-63.3-103.1-82.4 14.4-63.6 8-114.2-20.2-130.4-6.5-3.8-14.1-5.6-22.4-5.6v22.3c4.6 0 8.3.9 11.4 2.6 13.6 7.8 19.5 37.5 14.9 75.7-1.1 9.4-2.9 19.3-5.1 29.4-19.6-4.8-41-8.5-63.5-10.9-13.5-18.5-27.5-35.3-41.6-50 32.6-30.3 63.2-46.9 84-46.9V78c-27.5 0-63.5 19.6-99.9 53.6-36.4-33.8-72.4-53.2-99.9-53.2v22.3c20.7 0 51.4 16.5 84 46.6-14 14.7-28 31.4-41.3 49.9-22.6 2.4-44 6.1-63.6 11-2.3-10-4-19.7-5.2-29-4.7-38.2 1.1-67.9 14.6-75.8 3-1.8 6.9-2.6 11.5-2.6V78.5c-8.4 0-16 1.8-22.6 5.6-28.1 16.2-34.4 66.7-19.9 130.1-62.2 19.2-102.7 49.9-102.7 82.3 0 32.5 40.7 63.3 103.1 82.4-14.4 63.6-8 114.2 20.2 130.4 6.5 3.8 14.1 5.6 22.5 5.6 27.5 0 63.5-19.6 99.9-53.6 36.4 33.8 72.4 53.2 99.9 53.2 8.4 0 16-1.8 22.6-5.6 28.1-16.2 34.4-66.7 19.9-130.1 62-19.1 102.5-49.9 102.5-82.3zm-130.2-66.7c-3.7 12.9-8.3 26.2-13.5 39.5-4.1-8-8.4-16-13.1-24-4.6-8-9.5-15.8-14.4-23.4 14.2 2.1 27.9 4.7 41 7.9zm-45.8 106.5c-7.8 13.5-15.8 26.3-24.1 38.2-14.9 1.3-30 2-45.2 2-15.1 0-30.2-.7-45-1.9-8.3-11.9-16.4-24.6-24.2-38-7.6-13.1-14.5-26.4-20.8-39.8 6.2-13.4 13.2-26.8 20.7-39.9 7.8-13.5 15.8-26.3 24.1-38.2 14.9-1.3 30-2 45.2-2 15.1 0 30.2.7 45 1.9 8.3 11.9 16.4 24.6 24.2 38 7.6 13.1 14.5 26.4 20.8 39.8-6.3 13.4-13.2 26.8-20.7 39.9zm32.3-13c5.4 13.4 10 26.8 13.8 39.8-13.1 3.2-26.9 5.9-41.2 8 4.9-7.7 9.8-15.6 14.4-23.7 4.6-8 8.9-16.1 13-24.1zM421.2 430c-9.3-9.6-18.6-20.3-27.8-32 9 .4 18.2.7 27.5.7 9.4 0 18.7-.2 27.8-.7-9 11.7-18.3 22.4-27.5 32zm-74.4-58.9c-14.2-2.1-27.9-4.7-41-7.9 3.7-12.9 8.3-26.2 13.5-39.5 4.1 8 8.4 16 13.1 24 4.7 8 9.5 15.8 14.4 23.4zM420.7 163c9.3 9.6 18.6 20.3 27.8 32-9-.4-18.2-.7-27.5-.7-9.4 0-18.7.2-27.8.7 9-11.7 18.3-22.4 27.5-32zm-74 58.9c-4.9 7.7-9.8 15.6-14.4 23.7-4.6 8-8.9 16-13 24-5.4-13.4-10-26.8-13.8-39.8 13.1-3.1 26.9-5.8 41.2-7.9zm-90.5 125.2c-35.4-15.1-58.3-34.9-58.3-50.6 0-15.7 22.9-35.6 58.3-50.6 8.6-3.7 18-7 27.7-10.1 5.7 19.6 13.2 40 22.5 60.9-9.2 20.8-16.6 41.1-22.2 60.6-9.9-3.1-19.3-6.5-28-10.2zM310 490c-13.6-7.8-19.5-37.5-14.9-75.7 1.1-9.4 2.9-19.3 5.1-29.4 19.6 4.8 41 8.5 63.5 10.9 13.5 18.5 27.5 35.3 41.6 50-32.6 30.3-63.2 46.9-84 46.9-4.5-.1-8.3-1-11.3-2.7zm237.2-76.2c4.7 38.2-1.1 67.9-14.6 75.8-3 1.8-6.9 2.6-11.5 2.6-20.7 0-51.4-16.5-84-46.6 14-14.7 28-31.4 41.3-49.9 22.6-2.4 44-6.1 63.6-11 2.3 10.1 4.1 19.8 5.2 29.1zm38.5-66.7c-8.6 3.7-18 7-27.7 10.1-5.7-19.6-13.2-40-22.5-60.9 9.2-20.8 16.6-41.1 22.2-60.6 9.9 3.1 19.3 6.5 28.1 10.2 35.4 15.1 58.3 34.9 58.3 50.6-.1 15.7-23 35.6-58.4 50.6zM320.8 78.4z"/>
+        <circle cx="420.9" cy="296.5" r="45.7"/>
+        <path d="M520.5 78.1z"/>
+    </g>
+</svg>

demo/reactjs/src/serviceWorker.js

@@ -0,0 +1,127 @@
+// In production, we register a service worker to serve assets from local cache.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on the "N+1" visit to a page, since previously
+// cached resources are updated in the background.
+
+// To learn more about the benefits of this model, read https://goo.gl/KwvDNy.
+// This link also includes instructions on opting out of this behavior.
+
+const isLocalhost = Boolean(
+  window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.1/8 is considered localhost for IPv4.
+    window.location.hostname.match(
+      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+export function register(config) {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(process.env.PUBLIC_URL, window.location);
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener('load', () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Let's check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl, config);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            'This web app is being served cache-first by a service ' +
+              'worker. To learn more, visit https://goo.gl/SC7cgQ'
+          );
+        });
+      } else {
+        // Is not local host. Just register service worker
+        registerValidSW(swUrl, config);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl, config) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then(registration => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === 'installed') {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the old content will have been purged and
+              // the fresh content will have been added to the cache.
+              // It's the perfect time to display a "New content is
+              // available; please refresh." message in your web app.
+              console.log('New content is available; please refresh.');
+
+              // Execute callback
+              if (config.onUpdate) {
+                config.onUpdate(registration);
+              }
+            } else {
+              // At this point, everything has been precached.
+              // It's the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log('Content is cached for offline use.');
+
+              // Execute callback
+              if (config.onSuccess) {
+                config.onSuccess(registration);
+              }
+            }
+          }
+        };
+      };
+    })
+    .catch(error => {
+      console.error('Error during service worker registration:', error);
+    });
+}
+
+function checkValidServiceWorker(swUrl, config) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl)
+    .then(response => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      if (
+        response.status === 404 ||
+        response.headers.get('content-type').indexOf('javascript') === -1
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then(registration => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl, config);
+      }
+    })
+    .catch(() => {
+      console.log(
+        'No internet connection found. App is running in offline mode.'
+      );
+    });
+}
+
+export function unregister() {
+  if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.ready.then(registration => {
+      registration.unregister();
+    });
+  }
+}

demo/reactjs/src/views/demo.liquid

@@ -0,0 +1,18 @@
+<header className="App-header">
+    {{ logo | image }}
+    <h2>Welcome {{name | capitalize}}</h2>
+    <p>
+         Edit <code>src/App.js</code> and save to reload. 
+    </p>
+    <p>
+         You are using liquidjs & Reactjs 
+    </p>
+    <a
+        className="App-link"
+        href="https://reactjs.org"
+        target="_blank"
+        rel="noopener noreferrer"
+    >
+        Learn React
+    </a>
+</header>

index.js

@@ -1,151 +0,0 @@
-const Scope = require('./src/scope')
-const _ = require('./src/util/underscore.js')
-const assert = require('./src/util/assert.js')
-const tokenizer = require('./src/tokenizer.js')
-const statFileAsync = require('./src/util/fs.js').statFileAsync
-const readFileAsync = require('./src/util/fs.js').readFileAsync
-const path = require('path')
-const Render = require('./src/render.js')
-const lexical = require('./src/lexical.js')
-const Tag = require('./src/tag.js')
-const Filter = require('./src/filter.js')
-const Parser = require('./src/parser')
-const Syntax = require('./src/syntax.js')
-const tags = require('./tags')
-const filters = require('./filters')
-const Promise = require('any-promise')
-const anySeries = require('./src/util/promise.js').anySeries
-const Errors = require('./src/util/error.js')
-
-var _engine = {
-  init: function (tag, filter, options) {
-    if (options.cache) {
-      this.cache = {}
-    }
-    this.options = options
-    this.tag = tag
-    this.filter = filter
-    this.parser = Parser(tag, filter)
-    this.renderer = Render()
-
-    tags(this)
-    filters(this)
-
-    return this
-  },
-  parse: function (html, filepath) {
-    var tokens = tokenizer.parse(html, filepath, this.options)
-    return this.parser.parse(tokens)
-  },
-  render: function (tpl, ctx, opts) {
-    opts = _.assign({}, this.options, opts)
-    var scope = Scope.factory(ctx, opts)
-    return this.renderer.renderTemplates(tpl, scope)
-  },
-  parseAndRender: function (html, ctx, opts) {
-    return Promise.resolve()
-      .then(() => this.parse(html))
-      .then(tpl => this.render(tpl, ctx, opts))
-  },
-  renderFile: function (filepath, ctx, opts) {
-    opts = _.assign({}, opts)
-    return this.getTemplate(filepath, opts.root)
-      .then(templates => this.render(templates, ctx, opts))
-  },
-  evalOutput: function (str, scope) {
-    console.warn('[liquidjs:deprecated] use .evalValue() instead of .evalOutput')
-    return this.evalValue(str, scope)
-  },
-  evalValue: function (str, scope) {
-    var tpl = this.parser.parseValue(str.trim())
-    return this.renderer.evalValue(tpl, scope)
-  },
-  registerFilter: function (name, filter) {
-    return this.filter.register(name, filter)
-  },
-  registerTag: function (name, tag) {
-    return this.tag.register(name, tag)
-  },
-  lookup: function (filepath, root) {
-    root = this.options.root.concat(root || [])
-    root = _.uniq(root)
-    var paths = root.map(root => path.resolve(root, filepath))
-    return anySeries(paths, path => statFileAsync(path).then(() => path))
-      .catch((e) => {
-        e.message = `${e.code}: Failed to lookup ${filepath} in: ${root}`
-        throw e
-      })
-  },
-  getTemplate: function (filepath, root) {
-    if (!path.extname(filepath)) {
-      filepath += this.options.extname
-    }
-    return this
-      .lookup(filepath, root)
-      .then(filepath => {
-        if (this.options.cache) {
-          var tpl = this.cache[filepath]
-          if (tpl) {
-            return Promise.resolve(tpl)
-          }
-          return readFileAsync(filepath)
-            .then(str => this.parse(str))
-            .then(tpl => (this.cache[filepath] = tpl))
-        } else {
-          return readFileAsync(filepath).then(str => this.parse(str, filepath))
-        }
-      })
-  },
-  express: function (opts) {
-    opts = opts || {}
-    var self = this
-    return function (filePath, ctx, callback) {
-      assert(Array.isArray(this.root) || _.isString(this.root),
-        'illegal views root, are you using express.js?')
-      opts.root = this.root
-      self.renderFile(filePath, ctx, opts)
-        .then(html => callback(null, html))
-        .catch(e => callback(e))
-    }
-  }
-}
-
-function factory (options) {
-  options = _.assign({
-    root: ['.'],
-    cache: false,
-    extname: '',
-    trim_tag_right: false,
-    trim_tag_left: false,
-    trim_value_right: false,
-    trim_value_left: false,
-    greedy: true,
-    strict_filters: false,
-    strict_variables: false
-  }, options)
-  options.root = normalizeStringArray(options.root)
-
-  var engine = Object.create(_engine)
-  engine.init(Tag(), Filter(options), options)
-  return engine
-}
-
-function normalizeStringArray (value) {
-  if (Array.isArray(value)) return value
-  if (_.isString(value)) return [value]
-  return []
-}
-
-factory.lexical = lexical
-factory.isTruthy = Syntax.isTruthy
-factory.isFalsy = Syntax.isFalsy
-factory.evalExp = Syntax.evalExp
-factory.evalValue = Syntax.evalValue
-factory.Types = {
-  ParseError: Errors.ParseError,
-  TokenizationEroor: Errors.TokenizationError,
-  RenderBreakError: Errors.RenderBreakError,
-  AssertionError: Errors.AssertionError
-}
-
-module.exports = factory

makefile

@@ -1,18 +0,0 @@
-MINIFY = ./node_modules/.bin/uglifyjs
-BROWSERIFY = ./node_modules/.bin/browserify
-
-.PHONY: dist default clean
-
-default:
-
-dist: 
-	[ -d dist/ ] || mkdir dist/
-	$(BROWSERIFY) index.js -s Liquid \
-		--ignore path \
-		-t [ babelify --global true --presets [ es2015 ] ] \
-		> dist/liquid.js
-	$(MINIFY) dist/liquid.js --compress warnings=false --mangle --output dist/liquid.min.js
-	ls -lh dist/
-
-clean: 
-	rm -rf dist/

package.json

@@ -1,22 +1,31 @@
 {
   "name": "liquidjs",
-  "version": "2.0.2",
-  "description": "A Liquid template engine for Node.js and browsers, with all shopify/liquid features.",
-  "main": "index.js",
+  "version": "6.4.2",
+  "description": "Liquid template engine by pure JavaScript: compatible to shopify, easy to extend.",
+  "main": "dist/liquid.common.js",
+  "module": "src/index.js",
+  "browser": "dist/liquid.js",
+  "types": "src/index.d.ts",
   "scripts": {
-    "lint": "eslint src/ test/",
-    "test": "mocha --recursive",
-    "coverage": "NODE_ENV=test istanbul cover --report html ./node_modules/mocha/bin/_mocha -- -R spec --recursive",
-    "lcov": "NODE_ENV=test istanbul cover --report lcovonly ./node_modules/mocha/bin/_mocha -- -R spec --recursive",
-    "dist": "make dist",
-    "preversion": "npm run lint && npm test",
-    "version": "npm run dist && git add -A dist",
-    "postversion": "git push && git push --tags"
+    "lint": "eslint src/ test/ *.js",
+    "unit": "mocha test/unit",
+    "e2e": "mocha test/e2e",
+    "test": "npm run unit && npm run e2e",
+    "coverage": "cross-env NODE_ENV=test nyc --reporter=html npm run unit",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls",
+    "build": "rollup -c && ls -lh dist",
+    "version": "npm run build && git add -A dist",
+    "demo:browser": "echo open http://localhost:8080/demo/browser && http-server -c-1",
+    "demo:nodejs": "node ./demo/nodejs/index.js",
+    "demo:express": "cd ./demo/express/ && npm start"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/harttle/liquidjs.git"
   },
+  "engines": {
+    "node": ">=4.8.7"
+  },
   "keywords": [
     "liquid",
     "template engine",
@@ -30,30 +39,85 @@
     "url": "https://github.com/harttle/liquidjs/issues"
   },
   "homepage": "https://github.com/harttle/liquidjs#readme",
-  "dependencies": {
-    "any-promise": "^1.3.0"
-  },
   "devDependencies": {
-    "babel-preset-es2015": "^6.24.1",
-    "babelify": "^7.3.0",
-    "browserify": "^14.4.0",
-    "chai": "^4.1.2",
+    "@semantic-release/changelog": "^3.0.2",
+    "@semantic-release/commit-analyzer": "^6.1.0",
+    "@semantic-release/git": "^7.0.8",
+    "@semantic-release/npm": "^5.1.4",
+    "@semantic-release/release-notes-generator": "^7.1.4",
+    "babel-core": "^6.26.3",
+    "babel-plugin-external-helpers": "^6.22.0",
+    "babel-plugin-istanbul": "^5.1.0",
+    "babel-plugin-transform-runtime": "^6.23.0",
+    "babel-preset-env": "^1.7.0",
+    "babel-runtime": "^6.26.0",
+    "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
-    "coveralls": "^3.0.0",
-    "eslint": "^4.8.0",
-    "eslint-config-standard": "^10.2.1",
-    "eslint-plugin-import": "^2.7.0",
-    "eslint-plugin-mocha": "^4.11.0",
-    "eslint-plugin-node": "^5.2.0",
-    "eslint-plugin-promise": "^3.5.0",
-    "eslint-plugin-standard": "^3.0.1",
-    "express": "^4.16.1",
-    "istanbul": "^0.4.5",
-    "mocha": "^4.0.0",
-    "mock-fs": "^4.4.1",
-    "sinon": "^4.0.1",
-    "sinon-chai": "^2.14.0",
-    "supertest": "^3.0.0",
-    "uglify-js": "^3.1.3"
+    "coveralls": "^3.0.2",
+    "cross-env": "^5.2.0",
+    "eslint": "^5.12.1",
+    "eslint-config-standard": "^12.0.0",
+    "eslint-plugin-import": "^2.15.0",
+    "eslint-plugin-mocha": "^5.2.1",
+    "eslint-plugin-node": "^8.0.1",
+    "eslint-plugin-promise": "^4.0.1",
+    "eslint-plugin-standard": "^4.0.0",
+    "express": "^4.16.4",
+    "http-server": "^0.11.1",
+    "jsdom": "^13.2.0",
+    "mocha": "^5.2.0",
+    "mock-fs": "^4.7.0",
+    "nyc": "^13.1.0",
+    "regenerator-runtime": "^0.12.1",
+    "rollup": "^1.1.2",
+    "rollup-plugin-alias": "^1.5.1",
+    "rollup-plugin-babel": "^3.0.7",
+    "rollup-plugin-node-resolve": "^3.3.0",
+    "rollup-plugin-shim": "^1.0.0",
+    "rollup-plugin-uglify": "^6.0.2",
+    "semantic-release": "^15.13.3",
+    "sinon": "^7.2.3",
+    "sinon-chai": "^3.3.0",
+    "supertest": "^3.4.2"
+  },
+  "release": {
+    "branch": "master",
+    "plugins": [
+      "@semantic-release/commit-analyzer",
+      "@semantic-release/release-notes-generator",
+      "@semantic-release/changelog",
+      "@semantic-release/npm",
+      "@semantic-release/git"
+    ]
+  },
+  "nyc": {
+    "require": [
+      "babel-core/register"
+    ],
+    "sourceMap": false,
+    "instrument": false
+  },
+  "babel": {
+    "presets": [
+      "env"
+    ],
+    "plugins": [
+      [
+        "transform-runtime",
+        {
+          "helpers": false,
+          "polyfill": false,
+          "regenerator": true,
+          "moduleName": "babel-runtime"
+        }
+      ]
+    ],
+    "env": {
+      "test": {
+        "plugins": [
+          "istanbul"
+        ]
+      }
+    }
   }
 }

rollup.config.js

@@ -0,0 +1,75 @@
+import shim from 'rollup-plugin-shim'
+import alias from 'rollup-plugin-alias'
+import babel from 'rollup-plugin-babel'
+import { uglify } from 'rollup-plugin-uglify'
+import pkg from './package.json'
+import nodeResolve from 'rollup-plugin-node-resolve'
+
+const fake = { fs: `export default {}`, path: `export default {}` }
+const version = process.env.VERSION || pkg.version
+const sourcemap = true
+const banner = `/*
+ * liquidjs@${version}, https://github.com/harttle/liquidjs
+ * (c) 2016-${new Date().getFullYear()} harttle
+ * Released under the MIT License.
+ */`
+const treeshake = {
+  propertyReadSideEffects: false
+}
+const input = 'src/index.js'
+
+const babelConf = {
+  babelrc: false,
+  'presets': [['env', { 'modules': false }]],
+  'plugins': ['external-helpers']
+}
+
+export default [{
+  output: [{
+    file: 'dist/liquid.common.js',
+    name: 'Liquid',
+    format: 'cjs',
+    sourcemap,
+    banner
+  }],
+  external: ['path', 'fs'],
+  plugins: [
+    nodeResolve(),
+    babel(babelConf)
+  ],
+  treeshake,
+  input
+}, {
+  output: [{
+    file: 'dist/liquid.js',
+    name: 'Liquid',
+    format: 'umd',
+    sourcemap,
+    banner
+  }],
+  plugins: [
+    shim(fake),
+    alias({
+      './template': './template-browser'
+    }),
+    nodeResolve(),
+    babel(babelConf)
+  ],
+  treeshake,
+  input
+}, {
+  output: [{
+    file: 'dist/liquid.min.js',
+    name: 'Liquid',
+    format: 'umd',
+    sourcemap
+  }],
+  plugins: [
+    shim(fake),
+    nodeResolve(),
+    babel(babelConf),
+    uglify()
+  ],
+  treeshake,
+  input
+}]

src/filter.js

@@ -1,27 +1,27 @@
-const lexical = require('./lexical.js')
-const Syntax = require('./syntax.js')
-const assert = require('./util/assert.js')
-const _ = require('./util/underscore.js')
+import * as lexical from './lexical.js'
+import { evalValue } from './syntax.js'
+import assert from './util/assert.js'
+import { assign, create } from './util/underscore.js'
 
-var valueRE = new RegExp(`${lexical.value.source}`, 'g')
+const valueRE = new RegExp(`${lexical.value.source}`, 'g')
 
-module.exports = function (options) {
-  options = _.assign({}, options)
-  var filters = {}
+export default function (options) {
+  options = assign({}, options)
+  let filters = {}
 
-  var _filterInstance = {
+  const _filterInstance = {
     render: function (output, scope) {
-      var args = this.args.map(arg => Syntax.evalValue(arg, scope))
+      const args = this.args.map(arg => evalValue(arg, scope))
       args.unshift(output)
       return this.filter.apply(null, args)
     },
     parse: function (str) {
-      var match = lexical.filterLine.exec(str)
+      let match = lexical.filterLine.exec(str)
       assert(match, 'illegal filter: ' + str)
 
-      var name = match[1]
-      var argList = match[2] || ''
-      var filter = filters[name]
+      const name = match[1]
+      const argList = match[2] || ''
+      const filter = filters[name]
       if (typeof filter !== 'function') {
         if (options.strict_filters) {
           throw new TypeError(`undefined filter: ${name}`)
@@ -32,11 +32,13 @@ module.exports = function (options) {
         return this
       }
 
-      var args = []
+      const args = []
       while ((match = valueRE.exec(argList.trim()))) {
-        var v = match[0]
-        var re = new RegExp(`${v}\\s*:`, 'g')
-        re.test(match.input) ? args.push(`'${v}'`) : args.push(v)
+        const v = match[0]
+        const re = new RegExp(`${v}\\s*:`, 'g')
+        const keyMatch = re.exec(match.input)
+        const currentMatchIsKey = keyMatch && keyMatch.index === match.index
+        currentMatchIsKey ? args.push(`'${v}'`) : args.push(v)
       }
 
       this.name = name
@@ -48,7 +50,7 @@ module.exports = function (options) {
   }
 
   function construct (str) {
-    var instance = Object.create(_filterInstance)
+    const instance = create(_filterInstance)
     return instance.parse(str)
   }
 

src/filters.js

@@ -1,15 +1,15 @@
-const strftime = require('./src/util/strftime.js')
-const _ = require('./src/util/underscore.js')
-const isTruthy = require('./src/syntax.js').isTruthy
+import strftime from './util/strftime.js'
+import * as _ from './util/underscore.js'
+import { isTruthy } from './syntax.js'
 
-var escapeMap = {
+const escapeMap = {
   '&': '&',
   '<': '&lt;',
   '>': '&gt;',
   '"': '&#34;',
   "'": '&#39;'
 }
-var unescapeMap = {
+const unescapeMap = {
   '&amp;': '&',
   '&lt;': '<',
   '&gt;': '>',
@@ -17,26 +17,31 @@ var unescapeMap = {
   '&#39;': "'"
 }
 
-var filters = {
+const filters = {
   'abs': v => Math.abs(v),
   'append': (v, arg) => v + arg,
   'capitalize': str => stringify(str).charAt(0).toUpperCase() + str.slice(1),
   'ceil': v => Math.ceil(v),
   'concat': (v, arg) => Array.prototype.concat.call(v, arg),
   'date': (v, arg) => {
-    if (v === 'now') v = new Date()
-    return v instanceof Date ? strftime(v, arg) : ''
+    let date = v
+    if (v === 'now') {
+      date = new Date()
+    } else if (_.isString(v)) {
+      date = new Date(v)
+    }
+    return isValidDate(date) ? strftime(date, arg) : v
   },
   'default': (v, arg) => isTruthy(v) ? v : arg,
-  'divided_by': (v, arg) => Math.floor(v / arg),
+  'divided_by': (v, arg) => v / arg,
   'downcase': v => v.toLowerCase(),
   'escape': escape,
 
   'escape_once': str => escape(unescape(str)),
   'first': v => v[0],
   'floor': v => Math.floor(v),
-  'join': (v, arg) => v.join(arg),
-  'last': v => v[v.length - 1],
+  'join': (v, arg) => v.join(arg === undefined ? ' ' : arg),
+  'last': v => _.last(v),
   'lstrip': v => stringify(v).replace(/^\s+/, ''),
   'map': (arr, arg) => arr.map(v => v[arg]),
   'minus': bindFixed((v, arg) => v - arg),
@@ -51,17 +56,19 @@ var filters = {
   'replace_first': (v, arg1, arg2) => stringify(v).replace(arg1, arg2),
   'reverse': v => v.reverse(),
   'round': (v, arg) => {
-    var amp = Math.pow(10, arg || 0)
+    const amp = Math.pow(10, arg || 0)
     return Math.round(v * amp, arg) / amp
   },
   'rstrip': str => stringify(str).replace(/\s+$/, ''),
   'size': v => v.length,
-  'slice': (v, begin, length) =>
-    v.substr(begin, length === undefined ? 1 : length),
+  'slice': (v, begin, length) => {
+    if (length === undefined) length = 1
+    return v.slice(begin, begin + length)
+  },
   'sort': (v, arg) => v.sort(arg),
   'split': (v, arg) => stringify(v).split(arg),
   'strip': (v) => stringify(v).trim(),
-  'strip_html': v => stringify(v).replace(/<\/?\s*\w+\s*\/?>/g, ''),
+  'strip_html': v => stringify(v).replace(/<script.*?<\/script>|<!--.*?-->|<style.*?<\/style>|<.*?>/g, ''),
   'strip_newlines': v => stringify(v).replace(/\n/g, ''),
   'times': (v, arg) => v * arg,
   'truncate': (v, l, o) => {
@@ -73,13 +80,13 @@ var filters = {
   },
   'truncatewords': (v, l, o) => {
     if (o === undefined) o = '...'
-    var arr = v.split(' ')
-    var ret = arr.slice(0, l).join(' ')
+    const arr = v.split(' ')
+    let ret = arr.slice(0, l).join(' ')
     if (arr.length > l) ret += o
     return ret
   },
   'uniq': function (arr) {
-    var u = {}
+    const u = {}
     return (arr || []).filter(val => {
       if (u.hasOwnProperty(val)) {
         return false
@@ -89,7 +96,8 @@ var filters = {
     })
   },
   'upcase': str => stringify(str).toUpperCase(),
-  'url_encode': encodeURIComponent
+  'url_decode': x => x.split('+').map(decodeURIComponent).join(' '),
+  'url_encode': x => x.split(' ').map(encodeURIComponent).join('+')
 }
 
 function escape (str) {
@@ -101,7 +109,7 @@ function unescape (str) {
 }
 
 function getFixed (v) {
-  var p = (v + '').split('.')
+  const p = (v + '').split('.')
   return (p.length > 1) ? p[1].length : 0
 }
 
@@ -115,14 +123,17 @@ function stringify (obj) {
 
 function bindFixed (cb) {
   return (l, r) => {
-    var f = getMaxFixed(l, r)
+    const f = getMaxFixed(l, r)
     return cb(l, r).toFixed(f)
   }
 }
 
-function registerAll (liquid) {
+function isValidDate (date) {
+  return date instanceof Date && !isNaN(date.getTime())
+}
+
+export default function registerAll (liquid) {
   return _.forOwn(filters, (func, name) => liquid.registerFilter(name, func))
 }
 
 registerAll.filters = filters
-module.exports = registerAll

src/index.d.ts

@@ -0,0 +1,81 @@
+declare function Liquid(): Liquid.LiquidEngine;
+
+declare namespace Liquid {
+  export interface LiquidEngine {
+    private init(tag, filter, options): LiquidEngine
+    private respectCache(key, getter): Promise<any>
+    private evalValue: typeof Liquid.evalValue
+
+    public parse(html: string, filepath: string): Liquid.Template
+    public render(tpl: Template, ctx: any, opts: Options): Promise<string>
+    public parseAndRender(html: string, ctx: any, opts: Options): Promise<string>
+    public getTemplate(file: string, root: string): Promise<Liquid.Template>
+    public renderFile(file: string, ctx: any, opts: Options): Promise<string>
+    public registerFilter(name: string, filter: Filter): void
+    public registerTag(name: string, tag: Tag): void
+    public express(opts: Options): any
+  }
+
+  export interface Template { }
+  export interface Options {
+    /** `root` is a directory or an array of directories to resolve layouts and includes, as well as the filename passed in when calling `.renderFile()`. If an array, the files are looked up in the order they occur in the array. Defaults to `["."]`*/
+    root: string | string[]
+    /** `extname` is used to lookup the template file when filepath doesn't include an extension name. Eg: setting to `".html"` will allow including file by basename. Defaults to `""`. */
+    extname: string
+    /** `cache` indicates whether or not to cache resolved templates. Defaults to `false`. */
+    cache: boolean
+    /** `dynamicPartials`: if set, treat `<filepath>` parameter in `{%include filepath %}`, `{%layout filepath%}` as a variable, otherwise as a literal value. Defaults to `true`. */
+    dynamicPartials: boolean
+    /** `strict_filters` is used to enable strict filter existence. If set to `false`, undefined filters will be rendered as empty string. Otherwise, undefined filters will cause an exception. Defaults to `false`. */
+    strict_filters: boolean
+    /** `trim_tag_right` is used to strip blank characters (including ` `, `\t`, and `\r`) from the right of tags (`{% %}`) until `\n` (inclusive). Defaults to `false`. */
+    trim_tag_right: boolean
+    /** `trim_tag_left` is similiar to `trim_tag_right`, whereas the `\n` is exclusive. Defaults to `false`. See Whitespace Control for details. */
+    trim_tag_left: boolean
+    /** ``trim_value_right` is used to strip blank characters (including ` `, `\t`, and `\r`) from the right of values (`{{ }}`) until `\n` (inclusive). Defaults to `false`. */
+    trim_value_right: boolean
+    /** `trim_value_left` is similiar to `trim_value_right`, whereas the `\n` is exclusive. Defaults to `false`. See Whitespace Control for details. */
+    trim_value_left: boolean
+    /** `greedy` is used to specify whether `trim_left`/`trim_right` is greedy. When set to `true`, all consecutive blank characters including `\n` will be trimed regardless of line breaks. Defaults to `true`. */
+    greedy: boolean
+  }
+
+  export interface Tag {
+    // TODO: tokens type; this type
+    parse(this: any, tagToken: any, remainTokens: any): void
+    render(this: any, scope: any, hash: any): void
+  }
+  export type Filter = (...args?: any) => string
+
+  export function isTruthy(val: any): boolean;
+  export function isFalsy(val: any): boolean;
+  export function evalExp(exp: string, scope: any): any;
+  export function evalValue(str: string, scope: any): any;
+  export const Types: Types;
+
+  declare class LiquidError extends Error {
+    public input: string
+    public line: number
+    public file: string
+  }
+  export class ParseError extends LiquidError {
+    public originalError: Error
+  }
+  export class TokenizationError extends LiquidError { }
+  export class RenderBreakError extends LiquidError { }
+  export class AssertionError extends LiquidError { }
+
+  export interface Types {
+    ParseError: typeof ParseError,
+    TokenizationError: typeof TokenizationError,
+    RenderBreakError: typeof RenderBreakError,
+    AssertionError: typeof AssertionError,
+    AssignScope: any,
+    CaptureScope: any,
+    IncrementScope: any,
+    DecrementScope: any
+  }
+}
+
+export = Liquid;
+export default Liquid;

src/index.js

@@ -0,0 +1,133 @@
+import 'regenerator-runtime/runtime'
+import * as Scope from './scope'
+import * as template from './template'
+import * as _ from './util/underscore.js'
+import assert from './util/assert.js'
+import * as tokenizer from './tokenizer.js'
+import Render from './render.js'
+import Tag from './tag.js'
+import Filter from './filter.js'
+import Parser from './parser'
+import { isTruthy, isFalsy, evalExp, evalValue } from './syntax.js'
+import { ParseError, TokenizationError, RenderBreakError, AssertionError } from './util/error.js'
+import tags from './tags/index.js'
+import filters from './filters.js'
+
+const _engine = {
+  init: function (tag, filter, options) {
+    if (options.cache) {
+      this.cache = {}
+    }
+    this.options = options
+    this.tag = tag
+    this.filter = filter
+    this.parser = Parser(tag, filter)
+    this.renderer = Render()
+
+    tags(this, Liquid)
+    filters(this, Liquid)
+
+    return this
+  },
+  parse: function (html, filepath) {
+    const tokens = tokenizer.parse(html, filepath, this.options)
+    return this.parser.parse(tokens)
+  },
+  render: function (tpl, ctx, opts) {
+    opts = _.assign({}, this.options, opts)
+    const scope = Scope.factory(ctx, opts)
+    return this.renderer.renderTemplates(tpl, scope)
+  },
+  parseAndRender: async function (html, ctx, opts) {
+    const tpl = await this.parse(html)
+    return this.render(tpl, ctx, opts)
+  },
+  getTemplate: async function (file, root) {
+    const filepath = await template.resolve(file, root, this.options)
+    return this.respectCache(filepath, async () => {
+      const str = await template.read(filepath)
+      return this.parse(str, filepath)
+    })
+  },
+  renderFile: async function (file, ctx, opts) {
+    opts = _.assign({}, opts)
+    const templates = await this.getTemplate(file, opts.root)
+    return this.render(templates, ctx, opts)
+  },
+  respectCache: async function (key, getter) {
+    const cacheEnabled = this.options.cache
+    if (cacheEnabled && this.cache[key]) {
+      return this.cache[key]
+    }
+    const value = await getter()
+    if (cacheEnabled) {
+      this.cache[key] = value
+    }
+    return value
+  },
+  evalValue: function (str, scope) {
+    const tpl = this.parser.parseValue(str.trim())
+    return this.renderer.evalValue(tpl, scope)
+  },
+  registerFilter: function (name, filter) {
+    return this.filter.register(name, filter)
+  },
+  registerTag: function (name, tag) {
+    return this.tag.register(name, tag)
+  },
+  plugin: function (plugin) {
+    return plugin.call(this, Liquid)
+  },
+  express: function (opts) {
+    opts = opts || {}
+    const self = this
+    return function (filePath, ctx, cb) {
+      assert(_.isArray(this.root) || _.isString(this.root),
+        'illegal views root, are you using express.js?')
+      opts.root = this.root
+      self.renderFile(filePath, ctx, opts).then(html => cb(null, html), cb)
+    }
+  }
+}
+
+function normalizeStringArray (value) {
+  if (_.isArray(value)) return value
+  if (_.isString(value)) return [value]
+  throw new TypeError('illegal root: ' + value)
+}
+
+export default function Liquid (options) {
+  options = _.assign({
+    root: ['.'],
+    cache: false,
+    extname: '',
+    dynamicPartials: true,
+    trim_tag_right: false,
+    trim_tag_left: false,
+    trim_value_right: false,
+    trim_value_left: false,
+    greedy: true,
+    strict_filters: false,
+    strict_variables: false
+  }, options)
+  options.root = normalizeStringArray(options.root)
+
+  const engine = _.create(_engine)
+  engine.init(Tag(), Filter(options), options)
+  return engine
+}
+
+Liquid.isTruthy = isTruthy
+Liquid.isFalsy = isFalsy
+Liquid.evalExp = evalExp
+Liquid.evalValue = evalValue
+Liquid.Types = {
+  ParseError,
+  TokenizationError,
+  RenderBreakError,
+  AssertionError,
+  AssignScope: {},
+  CaptureScope: {},
+  IncrementScope: {},
+  DecrementScope: {}
+}

src/lexical.js

@@ -1,76 +1,76 @@
 // quote related
-var singleQuoted = /'[^']*'/
-var doubleQuoted = /"[^"]*"/
-var quoted = new RegExp(`${singleQuoted.source}|${doubleQuoted.source}`)
-var quoteBalanced = new RegExp(`(?:${quoted.source}|[^'"])*`)
+const singleQuoted = /'[^']*'/
+const doubleQuoted = /"[^"]*"/
+export const quoted = new RegExp(`${singleQuoted.source}|${doubleQuoted.source}`)
+export const quoteBalanced = new RegExp(`(?:${quoted.source}|[^'"])*`)
 
 // basic types
-var integer = /-?\d+/
-var number = /-?\d+\.?\d*|\.?\d+/
-var bool = /true|false/
+export const integer = /-?\d+/
+export const number = /-?\d+\.?\d*|\.?\d+/
+export const bool = /true|false/
 
-// peoperty access
-var identifier = /[\w-]+/
-var subscript = new RegExp(`\\[(?:${quoted.source}|[\\w-\\.]+)\\]`)
-var literal = new RegExp(`(?:${quoted.source}|${bool.source}|${number.source})`)
-var variable = new RegExp(`${identifier.source}(?:\\.${identifier.source}|${subscript.source})*`)
+// property access
+export const identifier = /[\w-]+[?]?/
+export const subscript = new RegExp(`\\[(?:${quoted.source}|[\\w-\\.]+)\\]`)
+export const literal = new RegExp(`(?:${quoted.source}|${bool.source}|${number.source})`)
+export const variable = new RegExp(`${identifier.source}(?:\\.${identifier.source}|${subscript.source})*`)
 
 // range related
-var rangeLimit = new RegExp(`(?:${variable.source}|${number.source})`)
-var range = new RegExp(`\\(${rangeLimit.source}\\.\\.${rangeLimit.source}\\)`)
-var rangeCapture = new RegExp(`\\((${rangeLimit.source})\\.\\.(${rangeLimit.source})\\)`)
+export const rangeLimit = new RegExp(`(?:${variable.source}|${number.source})`)
+export const range = new RegExp(`\\(${rangeLimit.source}\\.\\.${rangeLimit.source}\\)`)
+export const rangeCapture = new RegExp(`\\((${rangeLimit.source})\\.\\.(${rangeLimit.source})\\)`)
 
-var value = new RegExp(`(?:${variable.source}|${literal.source}|${range.source})`)
+export const value = new RegExp(`(?:${variable.source}|${literal.source}|${range.source})`)
 
 // hash related
-var hash = new RegExp(`(?:${identifier.source})\\s*:\\s*(?:${value.source})`)
-var hashCapture = new RegExp(`(${identifier.source})\\s*:\\s*(${value.source})`, 'g')
+export const hash = new RegExp(`(?:${identifier.source})\\s*:\\s*(?:${value.source})`)
+export const hashCapture = new RegExp(`(${identifier.source})\\s*:\\s*(${value.source})`, 'g')
 
 // full match
-var tagLine = new RegExp(`^\\s*(${identifier.source})\\s*([\\s\\S]*)\\s*$`)
-var literalLine = new RegExp(`^${literal.source}$`, 'i')
-var variableLine = new RegExp(`^${variable.source}$`)
-var numberLine = new RegExp(`^${number.source}$`)
-var boolLine = new RegExp(`^${bool.source}$`, 'i')
-var quotedLine = new RegExp(`^${quoted.source}$`)
-var rangeLine = new RegExp(`^${rangeCapture.source}$`)
-var integerLine = new RegExp(`^${integer.source}$`)
+export const tagLine = new RegExp(`^\\s*(${identifier.source})\\s*([\\s\\S]*)\\s*$`)
+export const literalLine = new RegExp(`^${literal.source}$`, 'i')
+export const variableLine = new RegExp(`^${variable.source}$`)
+export const numberLine = new RegExp(`^${number.source}$`)
+export const boolLine = new RegExp(`^${bool.source}$`, 'i')
+export const quotedLine = new RegExp(`^${quoted.source}$`)
+export const rangeLine = new RegExp(`^${rangeCapture.source}$`)
+export const integerLine = new RegExp(`^${integer.source}$`)
 
 // filter related
-var valueDeclaration = new RegExp(`(?:${identifier.source}\\s*:\\s*)?${value.source}`)
-var valueList = new RegExp(`${valueDeclaration.source}(\\s*,\\s*${valueDeclaration.source})*`)
-var filter = new RegExp(`${identifier.source}(?:\\s*:\\s*${valueList.source})?`, 'g')
-var filterCapture = new RegExp(`(${identifier.source})(?:\\s*:\\s*(${valueList.source}))?`)
-var filterLine = new RegExp(`^${filterCapture.source}$`)
+export const valueDeclaration = new RegExp(`(?:${identifier.source}\\s*:\\s*)?${value.source}`)
+export const valueList = new RegExp(`${valueDeclaration.source}(\\s*,\\s*${valueDeclaration.source})*`)
+export const filter = new RegExp(`${identifier.source}(?:\\s*:\\s*${valueList.source})?`, 'g')
+export const filterCapture = new RegExp(`(${identifier.source})(?:\\s*:\\s*(${valueList.source}))?`)
+export const filterLine = new RegExp(`^${filterCapture.source}$`)
 
-var operators = [
+export const operators = [
   /\s+or\s+/,
   /\s+and\s+/,
   /==|!=|<=|>=|<|>|\s+contains\s+/
 ]
 
-function isInteger (str) {
+export function isInteger (str) {
   return integerLine.test(str)
 }
 
-function isLiteral (str) {
+export function isLiteral (str) {
   return literalLine.test(str)
 }
 
-function isRange (str) {
+export function isRange (str) {
   return rangeLine.test(str)
 }
 
-function isVariable (str) {
+export function isVariable (str) {
   return variableLine.test(str)
 }
 
-function matchValue (str) {
+export function matchValue (str) {
   return value.exec(str)
 }
 
-function parseLiteral (str) {
-  var res = str.match(numberLine)
+export function parseLiteral (str) {
+  let res = str.match(numberLine)
   if (res) {
     return Number(str)
   }
@@ -84,33 +84,3 @@ function parseLiteral (str) {
   }
   throw new TypeError(`cannot parse '${str}' as literal`)
 }
-
-module.exports = {
-  quoted,
-  number,
-  bool,
-  literal,
-  filter,
-  integer,
-  hash,
-  hashCapture,
-  range,
-  rangeCapture,
-  identifier,
-  value,
-  quoteBalanced,
-  operators,
-  quotedLine,
-  numberLine,
-  boolLine,
-  rangeLine,
-  literalLine,
-  filterLine,
-  tagLine,
-  isLiteral,
-  isVariable,
-  parseLiteral,
-  isRange,
-  matchValue,
-  isInteger
-}

src/operators.js

@@ -1,17 +1,17 @@
-var operators = {
-  '==': (l, r) => l === r,
-  '!=': (l, r) => l !== r,
-  '>': (l, r) => l !== null && r !== null && l > r,
-  '<': (l, r) => l !== null && r !== null && l < r,
-  '>=': (l, r) => l !== null && r !== null && l >= r,
-  '<=': (l, r) => l !== null && r !== null && l <= r,
-  'contains': (l, r) => {
-    if (!l) return false
-    if (typeof l.indexOf !== 'function') return false
-    return l.indexOf(r) > -1
-  },
-  'and': (l, r) => l && r,
-  'or': (l, r) => l || r
+export default function (isTruthy) {
+  return {
+    '==': (l, r) => l === r,
+    '!=': (l, r) => l !== r,
+    '>': (l, r) => l !== null && r !== null && l > r,
+    '<': (l, r) => l !== null && r !== null && l < r,
+    '>=': (l, r) => l !== null && r !== null && l >= r,
+    '<=': (l, r) => l !== null && r !== null && l <= r,
+    'contains': (l, r) => {
+      if (!l) return false
+      if (typeof l.indexOf !== 'function') return false
+      return l.indexOf(r) > -1
+    },
+    'and': (l, r) => isTruthy(l) && isTruthy(r),
+    'or': (l, r) => isTruthy(l) || isTruthy(r)
+  }
 }
-
-module.exports = operators

src/parser.js

@@ -1,9 +1,10 @@
-const lexical = require('./lexical.js')
-const ParseError = require('./util/error.js').ParseError
-const assert = require('./util/assert.js')
+import * as lexical from './lexical.js'
+import { create } from './util/underscore.js'
+import { ParseError } from './util/error.js'
+import assert from './util/assert.js'
 
-module.exports = function (Tag, Filter) {
-  var stream = {
+export default function (Tag, Filter) {
+  const stream = {
     init: function (tokens) {
       this.tokens = tokens
       this.handlers = {}
@@ -14,7 +15,7 @@ module.exports = function (Tag, Filter) {
       return this
     },
     trigger: function (event, arg) {
-      var h = this.handlers[event]
+      const h = this.handlers[event]
       if (typeof h === 'function') {
         h(arg)
         return true
@@ -22,14 +23,14 @@ module.exports = function (Tag, Filter) {
     },
     start: function () {
       this.trigger('start')
-      var token
+      let token
       while (!this.stopRequested && (token = this.tokens.shift())) {
         if (this.trigger('token', token)) continue
         if (token.type === 'tag' &&
             this.trigger(`tag:${token.name}`, token)) {
           continue
         }
-        var template = parseToken(token, this.tokens)
+        const template = parseToken(token, this.tokens)
         this.trigger('template', template)
       }
       if (!this.stopRequested) this.trigger('end')
@@ -42,8 +43,8 @@ module.exports = function (Tag, Filter) {
   }
 
   function parse (tokens) {
-    var token
-    var templates = []
+    let token
+    const templates = []
     while ((token = tokens.shift())) {
       templates.push(parseToken(token, tokens))
     }
@@ -52,7 +53,7 @@ module.exports = function (Tag, Filter) {
 
   function parseToken (token, tokens) {
     try {
-      var tpl = null
+      let tpl = null
       if (token.type === 'tag') {
         tpl = parseTag(token, tokens)
       } else if (token.type === 'value') {
@@ -73,13 +74,13 @@ module.exports = function (Tag, Filter) {
   }
 
   function parseValue (str) {
-    var match = lexical.matchValue(str)
+    let match = lexical.matchValue(str)
     assert(match, `illegal value string: ${str}`)
 
-    var initial = match[0]
+    const initial = match[0]
     str = str.substr(match.index + match[0].length)
 
-    var filters = []
+    const filters = []
     while ((match = lexical.filter.exec(str))) {
       filters.push([match[0].trim()])
     }
@@ -92,7 +93,7 @@ module.exports = function (Tag, Filter) {
   }
 
   function parseStream (tokens) {
-    var s = Object.create(stream)
+    const s = create(stream)
     return s.init(tokens)
   }
 

src/render.js

@@ -1,68 +1,62 @@
-const Syntax = require('./syntax.js')
-const Promise = require('any-promise')
-const mapSeries = require('./util/promise.js').mapSeries
-const RenderBreakError = require('./util/error.js').RenderBreakError
-const RenderError = require('./util/error.js').RenderError
-const assert = require('./util/assert.js')
+import { evalExp } from './syntax.js'
+import { RenderBreakError, RenderError } from './util/error.js'
+import { stringify, create } from './util/underscore.js'
+import assert from './util/assert.js'
 
-var render = {
-
-  renderTemplates: function (templates, scope) {
+const render = {
+  renderTemplates: async function (templates, scope) {
     assert(scope, 'unable to evalTemplates: scope undefined')
 
-    var html = ''
-    return mapSeries(templates, (tpl) => {
-      return renderTemplate.call(this, tpl)
-        .then(partial => (html += partial))
-        .catch(e => {
-          if (e instanceof RenderBreakError) {
-            e.resolvedHTML = html
-            throw e
-          }
-          throw new RenderError(e, tpl)
-        })
-    }).then(() => html)
-
-    function renderTemplate (template) {
-      if (template.type === 'tag') {
-        return this.renderTag(template, scope)
-          .then(partial => partial === undefined ? '' : partial)
-      } else if (template.type === 'value') {
-        return Promise.resolve()
-          .then(() => this.evalValue(template, scope))
-          .then(partial => partial === undefined ? '' : stringify(partial))
-      } else { // template.type === 'html'
-        return Promise.resolve(template.value)
+    let html = ''
+    for (const tpl of templates) {
+      try {
+        html += await renderTemplate.call(this, tpl)
+      } catch (e) {
+        if (e instanceof RenderBreakError) {
+          e.resolvedHTML = html
+          throw e
+        }
+        throw new RenderError(e, tpl)
       }
     }
+    return html
+
+    async function renderTemplate (template) {
+      if (template.type === 'tag') {
+        const partial = await this.renderTag(template, scope)
+        return partial === undefined ? '' : partial
+      }
+      if (template.type === 'value') {
+        return this.renderValue(template, scope)
+      }
+      return template.value
+    }
   },
 
-  renderTag: function (template, scope) {
+  renderTag: async function (template, scope) {
     if (template.name === 'continue') {
-      return Promise.reject(new RenderBreakError('continue'))
+      throw new RenderBreakError('continue')
     }
     if (template.name === 'break') {
-      return Promise.reject(new RenderBreakError('break'))
+      throw new RenderBreakError('break')
     }
     return template.render(scope)
   },
 
+  renderValue: async function (template, scope) {
+    const partial = this.evalValue(template, scope)
+    return partial === undefined ? '' : stringify(partial)
+  },
+
   evalValue: function (template, scope) {
     assert(scope, 'unable to evalValue: scope undefined')
     return template.filters.reduce(
       (prev, filter) => filter.render(prev, scope),
-      Syntax.evalExp(template.initial, scope))
+      evalExp(template.initial, scope))
   }
 }
 
-function factory () {
-  var instance = Object.create(render)
+export default function () {
+  const instance = create(render)
   return instance
 }
-
-function stringify (val) {
-  if (typeof val === 'string') return val
-  return JSON.stringify(val)
-}
-
-module.exports = factory

src/scope.js

@@ -1,73 +1,75 @@
-const _ = require('./util/underscore.js')
-const lexical = require('./lexical.js')
-const assert = require('./util/assert.js')
+import * as _ from './util/underscore.js'
+import * as lexical from './lexical.js'
+import assert from './util/assert.js'
 
-var Scope = {
+const Scope = {
   getAll: function () {
-    var ctx = {}
-    for (var i = this.scopes.length - 1; i >= 0; i--) {
-      _.assign(ctx, this.scopes[i])
-    }
-    return ctx
+    return this.contexts.reduce((ctx, val) => _.assign(ctx, val), _.create(null))
   },
-  get: function (str) {
-    if (str === 'liquid') {
-      throw new Error('NO LONGER SUPPORTED: use scope.opts instread of scope.get("liquid")')
-    }
-    try {
-      return this.getPropertyByPath(this.scopes, str)
-    } catch (e) {
-      if (!/undefined variable/.test(e.message) || this.opts.strict_variables) {
-        throw e
+  get: function (path) {
+    const paths = this.propertyAccessSeq(path)
+    const scope = this.findContextFor(paths[0]) || _.last(this.contexts)
+    return paths.reduce((value, key) => this.readProperty(value, key), scope)
+  },
+  set: function (path, v) {
+    const paths = this.propertyAccessSeq(path)
+    let scope = this.findContextFor(paths[0]) || _.last(this.contexts)
+    paths.some((key, i) => {
+      if (!_.isObject(scope)) {
+        return true
       }
-    }
-  },
-  set: function (k, v) {
-    var scope = this.findScopeFor(k)
-    setPropertyByPath(scope, k, v)
-    return this
-  },
-  push: function (ctx) {
-    assert(ctx, `trying to push ${ctx} into scopes`)
-    return this.scopes.push(ctx)
-  },
-  pop: function () {
-    return this.scopes.pop()
-  },
-  findScopeFor: function (key) {
-    var i = this.scopes.length - 1
-    while (i >= 0 && !(key in this.scopes[i])) {
-      i--
-    }
-    if (i < 0) {
-      i = this.scopes.length - 1
-    }
-    return this.scopes[i]
+      if (i === paths.length - 1) {
+        scope[key] = v
+        return true
+      }
+      if (undefined === scope[key]) {
+        scope[key] = {}
+      }
+      scope = scope[key]
+    })
   },
   unshift: function (ctx) {
-    assert(ctx, `trying to push ${ctx} into scopes`)
-    return this.scopes.unshift(ctx)
+    return this.contexts.unshift(ctx)
   },
-  shift: function () {
-    return this.scopes.shift()
+  push: function (ctx) {
+    return this.contexts.push(ctx)
   },
-
-  getPropertyByPath: function (scopes, path) {
-    var paths = this.propertyAccessSeq(path + '')
-    if (!paths.length) {
-      throw new TypeError('undefined variable: ' + path)
+  pop: function (ctx) {
+    if (!arguments.length) {
+      return this.contexts.pop()
     }
-    var key = paths.shift()
-    var value = getValueFromScopes(key, scopes)
-    return paths.reduce(
-      (value, key) => {
-        if (_.isNil(value)) {
-          throw new TypeError('undefined variable: ' + key)
-        }
-        return getValueFromParent(key, value)
-      },
-      value
-    )
+    const i = this.contexts.findIndex(scope => scope === ctx)
+    if (i === -1) {
+      throw new TypeError('scope not found, cannot pop')
+    }
+    return this.contexts.splice(i, 1)[0]
+  },
+  findContextFor: function (key, filter) {
+    filter = filter || (() => true)
+    for (let i = this.contexts.length - 1; i >= 0; i--) {
+      const candidate = this.contexts[i]
+      if (!filter(candidate)) continue
+      if (key in candidate) {
+        return candidate
+      }
+    }
+    return null
+  },
+  readProperty: function (obj, key) {
+    let val
+    if (_.isNil(obj)) {
+      val = undefined
+    } else {
+      obj = toLiquid(obj)
+      val = key === 'size' ? readSize(obj) : obj[key]
+      if (_.isFunction(obj.liquid_method_missing)) {
+        val = obj.liquid_method_missing(key)
+      }
+    }
+    if (_.isNil(val) && this.opts.strict_variables) {
+      throw new TypeError(`undefined variable: ${key}`)
+    }
+    return val
   },
 
   /*
@@ -79,16 +81,17 @@ var Scope = {
    * accessSeq("foo[bar.coo]")    // ['foo', 'bar'], for bar.coo == 'bar'
    */
   propertyAccessSeq: function (str) {
-    var seq = []
-    var name = ''
-    var j
-    var i = 0
+    str = String(str)
+    const seq = []
+    let name = ''
+    let j
+    let i = 0
     while (i < str.length) {
       switch (str[i]) {
         case '[':
           push()
 
-          var delemiter = str[i + 1]
+          const delemiter = str[i + 1]
           if (/['"]/.test(delemiter)) { // foo["bar"]
             j = str.indexOf(delemiter, i + 2)
             assert(j !== -1, `unbalanced ${delemiter}: ${str}`)
@@ -100,7 +103,7 @@ var Scope = {
             assert(j !== -1, `unbalanced []: ${str}`)
             name = str.slice(i + 1, j)
             if (!lexical.isInteger(name)) { // foo[bar] vs. foo[1]
-              name = this.get(name)
+              name = String(this.get(name))
             }
             push()
             i = j + 1
@@ -116,6 +119,10 @@ var Scope = {
       }
     }
     push()
+
+    if (!seq.length) {
+      throw new TypeError(`invalid path:"${str}"`)
+    }
     return seq
 
     function push () {
@@ -125,38 +132,25 @@ var Scope = {
   }
 }
 
-function setPropertyByPath (obj, path, val) {
-  var paths = (path + '').replace(/\[/g, '.').replace(/\]/g, '').split('.')
-  for (var i = 0; i < paths.length; i++) {
-    var key = paths[i]
-    if (i === paths.length - 1) {
-      return (obj[key] = val)
-    }
-    if (undefined === obj[key]) obj[key] = {}
-    // case for readonly objects
-    obj = obj[key] || {}
+function toLiquid (obj) {
+  if (_.isFunction(obj.to_liquid)) {
+    return obj.to_liquid()
   }
+  if (_.isFunction(obj.toLiquid)) {
+    return obj.toLiquid()
+  }
+  return obj
 }
 
-function getValueFromParent (key, value) {
-  return (key === 'size' && (_.isArray(value) || _.isString(value)))
-    ? value.length
-    : value[key]
-}
-
-function getValueFromScopes (key, scopes) {
-  for (var i = scopes.length - 1; i > -1; i--) {
-    var scope = scopes[i]
-    if (scope.hasOwnProperty(key)) {
-      return scope[key]
-    }
-  }
-  throw new TypeError('undefined variable: ' + key)
+function readSize (obj) {
+  if (!_.isNil(obj.size)) return obj.size
+  if (_.isArray(obj) || _.isString(obj)) return obj.length
+  return obj.size
 }
 
 function matchRightBracket (str, begin) {
-  var stack = 1 // count of '[' - count of ']'
-  for (var i = begin; i < str.length; i++) {
+  let stack = 1 // count of '[' - count of ']'
+  for (let i = begin; i < str.length; i++) {
     if (str[i] === '[') {
       stack++
     }
@@ -170,15 +164,16 @@ function matchRightBracket (str, begin) {
   return -1
 }
 
-exports.factory = function (ctx, opts) {
-  var defaultOptions = {
+export function factory (ctx, opts) {
+  const defaultOptions = {
+    dynamicPartials: true,
     strict_variables: false,
     strict_filters: false,
     blocks: {},
     root: []
   }
-  var scope = Object.create(Scope)
+  const scope = _.create(Scope)
   scope.opts = _.assign(defaultOptions, opts)
-  scope.scopes = [ctx || {}]
+  scope.contexts = [ctx || {}]
   return scope
 }

src/syntax.js

@@ -1,27 +1,29 @@
-const operators = require('./operators.js')
-const lexical = require('./lexical.js')
-const assert = require('../src/util/assert.js')
+import Operators from './operators.js'
+import * as lexical from './lexical.js'
+import assert from './util/assert.js'
 
-function evalExp (exp, scope) {
+const operators = Operators(isTruthy)
+
+export function evalExp (exp, scope) {
   assert(scope, 'unable to evalExp: scope undefined')
-  var operatorREs = lexical.operators
-  var match
-  for (var i = 0; i < operatorREs.length; i++) {
-    var operatorRE = operatorREs[i]
-    var expRE = new RegExp(`^(${lexical.quoteBalanced.source})(${operatorRE.source})(${lexical.quoteBalanced.source})$`)
+  const operatorREs = lexical.operators
+  let match
+  for (let i = 0; i < operatorREs.length; i++) {
+    const operatorRE = operatorREs[i]
+    const expRE = new RegExp(`^(${lexical.quoteBalanced.source})(${operatorRE.source})(${lexical.quoteBalanced.source})$`)
     if ((match = exp.match(expRE))) {
-      var l = evalExp(match[1], scope)
-      var op = operators[match[2].trim()]
-      var r = evalExp(match[3], scope)
+      const l = evalExp(match[1], scope)
+      const op = operators[match[2].trim()]
+      const r = evalExp(match[3], scope)
       return op(l, r)
     }
   }
 
   if ((match = exp.match(lexical.rangeLine))) {
-    var low = evalValue(match[1], scope)
-    var high = evalValue(match[2], scope)
-    var range = []
-    for (var j = low; j <= high; j++) {
+    const low = evalValue(match[1], scope)
+    const high = evalValue(match[2], scope)
+    const range = []
+    for (let j = low; j <= high; j++) {
       range.push(j)
     }
     return range
@@ -30,7 +32,7 @@ function evalExp (exp, scope) {
   return evalValue(exp, scope)
 }
 
-function evalValue (str, scope) {
+export function evalValue (str, scope) {
   str = str && str.trim()
   if (!str) return undefined
 
@@ -43,14 +45,10 @@ function evalValue (str, scope) {
   throw new TypeError(`cannot eval '${str}' as value`)
 }
 
-function isTruthy (val) {
+export function isTruthy (val) {
   return !isFalsy(val)
 }
 
-function isFalsy (val) {
+export function isFalsy (val) {
   return val === false || undefined === val || val === null
 }
-
-module.exports = {
-  evalExp, evalValue, isTruthy, isFalsy
-}

src/tag.js

@@ -1,40 +1,40 @@
-const lexical = require('./lexical.js')
-const Promise = require('any-promise')
-const Syntax = require('./syntax.js')
-const assert = require('./util/assert.js')
+import { hashCapture } from './lexical.js'
+import { create } from './util/underscore.js'
+import { evalValue } from './syntax.js'
+import assert from './util/assert.js'
 
 function hash (markup, scope) {
-  var obj = {}
-  var match
-  lexical.hashCapture.lastIndex = 0
-  while ((match = lexical.hashCapture.exec(markup))) {
-    var k = match[1]
-    var v = match[2]
-    obj[k] = Syntax.evalValue(v, scope)
+  const obj = {}
+  let match
+  hashCapture.lastIndex = 0
+  while ((match = hashCapture.exec(markup))) {
+    const k = match[1]
+    const v = match[2]
+    obj[k] = evalValue(v, scope)
   }
   return obj
 }
 
-module.exports = function () {
-  var tagImpls = {}
+export default function () {
+  let tagImpls = {}
 
-  var _tagInstance = {
-    render: function (scope) {
-      var obj = hash(this.token.args, scope)
-      var impl = this.tagImpl
+  const _tagInstance = {
+    render: async function (scope) {
+      const obj = hash(this.token.args, scope)
+      const impl = this.tagImpl
       if (typeof impl.render !== 'function') {
-        return Promise.resolve('')
+        return ''
       }
-      return Promise.resolve().then(() => impl.render(scope, obj))
+      return impl.render(scope, obj)
     },
     parse: function (token, tokens) {
       this.type = 'tag'
       this.token = token
       this.name = token.name
 
-      var tagImpl = tagImpls[this.name]
+      const tagImpl = tagImpls[this.name]
       assert(tagImpl, `tag ${this.name} not found`)
-      this.tagImpl = Object.create(tagImpl)
+      this.tagImpl = create(tagImpl)
       if (this.tagImpl.parse) {
         this.tagImpl.parse(token, tokens)
       }
@@ -46,7 +46,7 @@ module.exports = function () {
   }
 
   function construct (token, tokens) {
-    var instance = Object.create(_tagInstance)
+    const instance = create(_tagInstance)
     instance.parse(token, tokens)
     return instance
   }

src/tags/assign.js

@@ -0,0 +1,23 @@
+import assert from '../util/assert.js'
+import { identifier } from '../lexical.js'
+import { create } from '../util/underscore.js'
+
+export default function (liquid, Liquid) {
+  const re = new RegExp(`(${identifier.source})\\s*=([^]*)`)
+  const { AssignScope } = Liquid.Types
+
+  liquid.registerTag('assign', {
+    parse: function (token) {
+      const match = token.args.match(re)
+      assert(match, `illegal token ${token.raw}`)
+      this.key = match[1]
+      this.value = match[2]
+    },
+    render: function (scope) {
+      const ctx = create(AssignScope)
+      ctx[this.key] = liquid.evalValue(this.value, scope)
+      scope.push(ctx)
+      return Promise.resolve('')
+    }
+  })
+}

src/tags/capture.js

@@ -0,0 +1,32 @@
+import assert from '../util/assert.js'
+import { create } from '../util/underscore.js'
+import { identifier } from '../lexical.js'
+
+export default function (liquid, Liquid) {
+  const re = new RegExp(`(${identifier.source})`)
+  const { CaptureScope } = Liquid.Types
+
+  liquid.registerTag('capture', {
+    parse: function (tagToken, remainTokens) {
+      const match = tagToken.args.match(re)
+      assert(match, `${tagToken.args} not valid identifier`)
+
+      this.variable = match[1]
+      this.templates = []
+
+      const stream = liquid.parser.parseStream(remainTokens)
+      stream.on('tag:endcapture', token => stream.stop())
+        .on('template', tpl => this.templates.push(tpl))
+        .on('end', x => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
+      stream.start()
+    },
+    render: async function (scope, hash) {
+      const html = await liquid.renderer.renderTemplates(this.templates, scope)
+      const ctx = create(CaptureScope)
+      ctx[this.variable] = html
+      scope.push(ctx)
+    }
+  })
+}

src/tags/case.js

@@ -1,6 +1,4 @@
-const Liquid = require('..')
-
-module.exports = function (liquid) {
+export default function (liquid, Liquid) {
   liquid.registerTag('case', {
 
     parse: function (tagToken, remainTokens) {
@@ -8,8 +6,8 @@ module.exports = function (liquid) {
       this.cases = []
       this.elseTemplates = []
 
-      var p = []
-      var stream = liquid.parser.parseStream(remainTokens)
+      let p = []
+      const stream = liquid.parser.parseStream(remainTokens)
         .on('tag:when', token => {
           this.cases.push({
             val: token.args,
@@ -27,10 +25,10 @@ module.exports = function (liquid) {
     },
 
     render: function (scope, hash) {
-      for (var i = 0; i < this.cases.length; i++) {
-        var branch = this.cases[i]
-        var val = Liquid.evalExp(branch.val, scope)
-        var cond = Liquid.evalExp(this.cond, scope)
+      for (let i = 0; i < this.cases.length; i++) {
+        const branch = this.cases[i]
+        const val = Liquid.evalExp(branch.val, scope)
+        const cond = Liquid.evalExp(this.cond, scope)
         if (val === cond) {
           return liquid.renderer.renderTemplates(branch.templates, scope)
         }

src/tags/comment.js

@@ -0,0 +1,15 @@
+export default function (liquid) {
+  liquid.registerTag('comment', {
+    parse: function (tagToken, remainTokens) {
+      const stream = liquid.parser.parseStream(remainTokens)
+      stream
+        .on('token', token => {
+          if (token.name === 'endcomment') stream.stop()
+        })
+        .on('end', x => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
+      stream.start()
+    }
+  })
+}

src/tags/cycle.js

@@ -0,0 +1,43 @@
+import assert from '../util/assert.js'
+import { value as rValue } from '../lexical.js'
+
+export default function (liquid, Liquid) {
+  const groupRE = new RegExp(`^(?:(${rValue.source})\\s*:\\s*)?(.*)$`)
+  const candidatesRE = new RegExp(rValue.source, 'g')
+
+  liquid.registerTag('cycle', {
+
+    parse: function (tagToken, remainTokens) {
+      let match = groupRE.exec(tagToken.args)
+      assert(match, `illegal tag: ${tagToken.raw}`)
+
+      this.group = match[1] || ''
+      const candidates = match[2]
+
+      this.candidates = []
+
+      while ((match = candidatesRE.exec(candidates))) {
+        this.candidates.push(match[0])
+      }
+      assert(this.candidates.length, `empty candidates: ${tagToken.raw}`)
+    },
+
+    render: function (scope, hash) {
+      const group = Liquid.evalValue(this.group, scope)
+      const fingerprint = `cycle:${group}:` + this.candidates.join(',')
+
+      const groups = scope.opts.groups = scope.opts.groups || {}
+      let idx = groups[fingerprint]
+
+      if (idx === undefined) {
+        idx = groups[fingerprint] = 0
+      }
+
+      const candidate = this.candidates[idx]
+      idx = (idx + 1) % this.candidates.length
+      groups[fingerprint] = idx
+
+      return Liquid.evalValue(candidate, scope)
+    }
+  })
+}

src/tags/decrement.js

@@ -0,0 +1,32 @@
+import { create } from '../util/underscore.js'
+import assert from '../util/assert.js'
+import { identifier } from '../lexical.js'
+
+export default function (liquid, Liquid) {
+  const { CaptureScope, AssignScope, DecrementScope } = Liquid.Types
+
+  liquid.registerTag('decrement', {
+    parse: function (token) {
+      const match = token.args.match(identifier)
+      assert(match, `illegal identifier ${token.args}`)
+      this.variable = match[0]
+    },
+    render: function (scope, hash) {
+      let context = scope.findContextFor(
+        this.variable,
+        ctx => {
+          const proto = Object.getPrototypeOf(ctx)
+          return proto !== CaptureScope && proto !== AssignScope
+        }
+      )
+      if (!context) {
+        context = create(DecrementScope)
+        scope.unshift(context)
+      }
+      if (typeof context[this.variable] !== 'number') {
+        context[this.variable] = 0
+      }
+      return --context[this.variable]
+    }
+  })
+}

src/tags/for.js

@@ -0,0 +1,93 @@
+import { mapSeries } from '../util/promise.js'
+import { isString, isObject, isArray } from '../util/underscore.js'
+import assert from '../util/assert.js'
+import { identifier, value, hash } from '../lexical.js'
+
+export default function (liquid, Liquid) {
+  const RenderBreakError = Liquid.Types.RenderBreakError
+  const re = new RegExp(`^(${identifier.source})\\s+in\\s+` +
+      `(${value.source})` +
+      `(?:\\s+${hash.source})*` +
+      `(?:\\s+(reversed))?` +
+      `(?:\\s+${hash.source})*$`)
+
+  liquid.registerTag('for', { parse, render })
+
+  function parse (tagToken, remainTokens) {
+    const match = re.exec(tagToken.args)
+    assert(match, `illegal tag: ${tagToken.raw}`)
+    this.variable = match[1]
+    this.collection = match[2]
+    this.reversed = !!match[3]
+
+    this.templates = []
+    this.elseTemplates = []
+
+    let p
+    const stream = liquid.parser.parseStream(remainTokens)
+      .on('start', () => (p = this.templates))
+      .on('tag:else', () => (p = this.elseTemplates))
+      .on('tag:endfor', () => stream.stop())
+      .on('template', tpl => p.push(tpl))
+      .on('end', () => {
+        throw new Error(`tag ${tagToken.raw} not closed`)
+      })
+
+    stream.start()
+  }
+  async function render (scope, hash) {
+    let collection = Liquid.evalExp(this.collection, scope)
+
+    if (!isArray(collection)) {
+      if (isString(collection) && collection.length > 0) {
+        collection = [collection]
+      } else if (isObject(collection)) {
+        collection = Object.keys(collection).map((key) => [key, collection[key]])
+      }
+    }
+    if (!isArray(collection) || !collection.length) {
+      return liquid.renderer.renderTemplates(this.elseTemplates, scope)
+    }
+
+    const offset = hash.offset || 0
+    const limit = (hash.limit === undefined) ? collection.length : hash.limit
+
+    collection = collection.slice(offset, offset + limit)
+    if (this.reversed) collection.reverse()
+
+    const contexts = collection.map((item, i) => {
+      const ctx = {}
+      ctx[this.variable] = item
+      ctx.forloop = {
+        first: i === 0,
+        index: i + 1,
+        index0: i,
+        last: i === collection.length - 1,
+        length: collection.length,
+        rindex: collection.length - i,
+        rindex0: collection.length - i - 1
+      }
+      return ctx
+    })
+
+    let html = ''
+    let finished = false
+    await mapSeries(contexts, async context => {
+      if (finished) return
+
+      scope.push(context)
+      try {
+        html += await liquid.renderer.renderTemplates(this.templates, scope)
+      } catch (e) {
+        if (e instanceof RenderBreakError) {
+          html += e.resolvedHTML
+          if (e.message === 'break') {
+            finished = true
+          }
+        } else throw e
+      }
+      scope.pop(context)
+    })
+    return html
+  }
+}

src/tags/if.js

@@ -1,14 +1,12 @@
-const Liquid = require('..')
-
-module.exports = function (liquid) {
+export default function (liquid, Liquid) {
   liquid.registerTag('if', {
 
     parse: function (tagToken, remainTokens) {
       this.branches = []
       this.elseTemplates = []
 
-      var p
-      var stream = liquid.parser.parseStream(remainTokens)
+      let p
+      const stream = liquid.parser.parseStream(remainTokens)
         .on('start', () => this.branches.push({
           cond: tagToken.args,
           templates: (p = [])
@@ -30,9 +28,8 @@ module.exports = function (liquid) {
     },
 
     render: function (scope, hash) {
-      for (var i = 0; i < this.branches.length; i++) {
-        var branch = this.branches[i]
-        var cond = Liquid.evalExp(branch.cond, scope)
+      for (const branch of this.branches) {
+        const cond = Liquid.evalExp(branch.cond, scope)
         if (Liquid.isTruthy(cond)) {
           return liquid.renderer.renderTemplates(branch.templates, scope)
         }

src/tags/include.js

@@ -0,0 +1,57 @@
+import assert from '../util/assert.js'
+import { value, quotedLine } from '../lexical.js'
+
+const staticFileRE = /[^\s,]+/
+
+export default function (liquid, Liquid) {
+  const withRE = new RegExp(`with\\s+(${value.source})`)
+
+  liquid.registerTag('include', {
+    parse: function (token) {
+      let match = staticFileRE.exec(token.args)
+      if (match) {
+        this.staticValue = match[0]
+      }
+
+      match = value.exec(token.args)
+      if (match) {
+        this.value = match[0]
+      }
+
+      match = withRE.exec(token.args)
+      if (match) {
+        this.with = match[1]
+      }
+    },
+    render: async function (scope, hash) {
+      let filepath
+      if (scope.opts.dynamicPartials) {
+        if (quotedLine.exec(this.value)) {
+          const template = this.value.slice(1, -1)
+          filepath = await liquid.parseAndRender(template, scope.getAll(), scope.opts)
+        } else {
+          filepath = Liquid.evalValue(this.value, scope)
+        }
+      } else {
+        filepath = this.staticValue
+      }
+      assert(filepath, `cannot include with empty filename`)
+
+      const originBlocks = scope.opts.blocks
+      const originBlockMode = scope.opts.blockMode
+
+      scope.opts.blocks = {}
+      scope.opts.blockMode = 'output'
+      if (this.with) {
+        hash[filepath] = Liquid.evalValue(this.with, scope)
+      }
+      const templates = await liquid.getTemplate(filepath, scope.opts.root)
+      scope.push(hash)
+      const html = await liquid.renderer.renderTemplates(templates, scope)
+      scope.pop(hash)
+      scope.opts.blocks = originBlocks
+      scope.opts.blockMode = originBlockMode
+      return html
+    }
+  })
+}

src/tags/increment.js

@@ -0,0 +1,34 @@
+import assert from '../util/assert.js'
+import { create } from '../util/underscore.js'
+import { identifier } from '../lexical.js'
+
+export default function (liquid, Liquid) {
+  const { CaptureScope, AssignScope, IncrementScope } = Liquid.Types
+
+  liquid.registerTag('increment', {
+    parse: function (token) {
+      const match = token.args.match(identifier)
+      assert(match, `illegal identifier ${token.args}`)
+      this.variable = match[0]
+    },
+    render: function (scope, hash) {
+      let context = scope.findContextFor(
+        this.variable,
+        ctx => {
+          const proto = Object.getPrototypeOf(ctx)
+          return proto !== CaptureScope && proto !== AssignScope
+        }
+      )
+      if (!context) {
+        context = create(IncrementScope)
+        scope.unshift(context)
+      }
+      if (typeof context[this.variable] !== 'number') {
+        context[this.variable] = 0
+      }
+      const val = context[this.variable]
+      context[this.variable]++
+      return val
+    }
+  })
+}

src/tags/index.js

@@ -0,0 +1,31 @@
+import For from './for.js'
+import Assign from './assign.js'
+import Capture from './capture.js'
+import Case from './case.js'
+import Comment from './comment.js'
+import Include from './include.js'
+import Decrement from './decrement.js'
+import Cycle from './cycle.js'
+import If from './if.js'
+import Increment from './increment.js'
+import Layout from './layout.js'
+import Raw from './raw.js'
+import Tablerow from './tablerow.js'
+import Unless from './unless.js'
+
+export default function (engine, Liquid) {
+  Assign(engine, Liquid)
+  Capture(engine, Liquid)
+  Case(engine, Liquid)
+  Comment(engine, Liquid)
+  Cycle(engine, Liquid)
+  Decrement(engine, Liquid)
+  For(engine, Liquid)
+  If(engine, Liquid)
+  Include(engine, Liquid)
+  Increment(engine, Liquid)
+  Layout(engine, Liquid)
+  Raw(engine, Liquid)
+  Tablerow(engine, Liquid)
+  Unless(engine, Liquid)
+}

src/tags/layout.js

@@ -0,0 +1,75 @@
+import assert from '../util/assert.js'
+import { value as rValue } from '../lexical.js'
+
+/*
+ * blockMode:
+ * * "store": store rendered html into blocks
+ * * "output": output rendered html
+ */
+
+export default function (liquid, Liquid) {
+  const staticFileRE = /\S+/
+
+  liquid.registerTag('layout', {
+    parse: function (token, remainTokens) {
+      let match = staticFileRE.exec(token.args)
+      if (match) {
+        this.staticLayout = match[0]
+      }
+
+      match = rValue.exec(token.args)
+      if (match) {
+        this.layout = match[0]
+      }
+
+      this.tpls = liquid.parser.parse(remainTokens)
+    },
+    render: async function (scope, hash) {
+      const layout = scope.opts.dynamicPartials
+        ? Liquid.evalValue(this.layout, scope)
+        : this.staticLayout
+      assert(layout, `cannot apply layout with empty filename`)
+
+      // render the remaining tokens immediately
+      scope.opts.blockMode = 'store'
+      const html = await liquid.renderer.renderTemplates(this.tpls, scope)
+      if (scope.opts.blocks[''] === undefined) {
+        scope.opts.blocks[''] = html
+      }
+      const templates = await liquid.getTemplate(layout, scope.opts.root)
+      scope.push(hash)
+      scope.opts.blockMode = 'output'
+      const partial = await liquid.renderer.renderTemplates(templates, scope)
+      scope.pop(hash)
+      return partial
+    }
+  })
+
+  liquid.registerTag('block', {
+    parse: function (token, remainTokens) {
+      const match = /\w+/.exec(token.args)
+      this.block = match ? match[0] : ''
+
+      this.tpls = []
+      const stream = liquid.parser.parseStream(remainTokens)
+        .on('tag:endblock', () => stream.stop())
+        .on('template', tpl => this.tpls.push(tpl))
+        .on('end', () => {
+          throw new Error(`tag ${token.raw} not closed`)
+        })
+      stream.start()
+    },
+    render: async function (scope) {
+      const childDefined = scope.opts.blocks[this.block]
+      const html = childDefined !== undefined
+        ? childDefined
+        : await liquid.renderer.renderTemplates(this.tpls, scope)
+
+      if (scope.opts.blockMode === 'store') {
+        scope.opts.blocks[this.block] = html
+        return ''
+      }
+      return html
+    }
+  })
+}

src/tags/raw.js

@@ -1,24 +1,21 @@
-const Promise = require('any-promise')
-
-module.exports = function (liquid) {
+export default function (liquid) {
   liquid.registerTag('raw', {
     parse: function (tagToken, remainTokens) {
       this.tokens = []
 
-      var stream = liquid.parser.parseStream(remainTokens)
+      const stream = liquid.parser.parseStream(remainTokens)
       stream
         .on('token', token => {
           if (token.name === 'endraw') stream.stop()
           else this.tokens.push(token)
         })
-        .on('end', x => {
+        .on('end', () => {
           throw new Error(`tag ${tagToken.raw} not closed`)
         })
       stream.start()
     },
     render: function (scope, hash) {
-      var tokens = this.tokens.map(token => token.raw).join('')
-      return Promise.resolve(tokens)
+      return this.tokens.map(token => token.raw).join('')
     }
   })
 }

src/tags/tablerow.js

@@ -0,0 +1,70 @@
+import { mapSeries } from '../util/promise.js'
+import assert from '../util/assert.js'
+import { identifier, value, hash } from '../lexical.js'
+
+export default function (liquid, Liquid) {
+  const re = new RegExp(`^(${identifier.source})\\s+in\\s+` +
+    `(${value.source})` +
+    `(?:\\s+${hash.source})*$`)
+
+  liquid.registerTag('tablerow', {
+
+    parse: function (tagToken, remainTokens) {
+      const match = re.exec(tagToken.args)
+      assert(match, `illegal tag: ${tagToken.raw}`)
+
+      this.variable = match[1]
+      this.collection = match[2]
+      this.templates = []
+
+      let p
+      const stream = liquid.parser.parseStream(remainTokens)
+        .on('start', () => (p = this.templates))
+        .on('tag:endtablerow', token => stream.stop())
+        .on('template', tpl => p.push(tpl))
+        .on('end', () => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
+
+      stream.start()
+    },
+
+    render: async function (scope, hash) {
+      let collection = Liquid.evalExp(this.collection, scope) || []
+      const offset = hash.offset || 0
+      const limit = (hash.limit === undefined) ? collection.length : hash.limit
+
+      collection = collection.slice(offset, offset + limit)
+      const cols = hash.cols || collection.length
+      const contexts = collection.map((item, i) => {
+        const ctx = {}
+        ctx[this.variable] = item
+        return ctx
+      })
+
+      let row
+      let html = ''
+      await mapSeries(contexts, async (context, idx) => {
+        row = Math.floor(idx / cols) + 1
+        const col = (idx % cols) + 1
+        if (col === 1) {
+          if (row !== 1) {
+            html += '</tr>'
+          }
+          html += `<tr class="row${row}">`
+        }
+
+        html += `<td class="col${col}">`
+        scope.push(context)
+        html += await liquid.renderer.renderTemplates(this.templates, scope)
+        html += '</td>'
+        scope.pop(context)
+        return html
+      })
+      if (row > 0) {
+        html += '</tr>'
+      }
+      return html
+    }
+  })
+}

src/tags/unless.js

@@ -0,0 +1,29 @@
+export default function (liquid, Liquid) {
+  liquid.registerTag('unless', {
+    parse: function (tagToken, remainTokens) {
+      this.templates = []
+      this.elseTemplates = []
+      let p
+      const stream = liquid.parser.parseStream(remainTokens)
+        .on('start', x => {
+          p = this.templates
+          this.cond = tagToken.args
+        })
+        .on('tag:else', () => (p = this.elseTemplates))
+        .on('tag:endunless', token => stream.stop())
+        .on('template', tpl => p.push(tpl))
+        .on('end', x => {
+          throw new Error(`tag ${tagToken.raw} not closed`)
+        })
+
+      stream.start()
+    },
+
+    render: function (scope, hash) {
+      const cond = Liquid.evalExp(this.cond, scope)
+      return Liquid.isFalsy(cond)
+        ? liquid.renderer.renderTemplates(this.templates, scope)
+        : liquid.renderer.renderTemplates(this.elseTemplates, scope)
+    }
+  })
+}

src/template-browser.js

@@ -0,0 +1,52 @@
+import { last, isArray } from './util/underscore'
+
+function domResolve (root, path) {
+  const base = document.createElement('base')
+  base.href = root
+
+  const head = document.getElementsByTagName('head')[0]
+  head.insertBefore(base, head.firstChild)
+
+  const a = document.createElement('a')
+  a.href = path
+  const resolved = a.href
+  head.removeChild(base)
+
+  return resolved
+}
+
+export function resolve (filepath, root, options) {
+  root = root || options.root
+  if (isArray(root)) {
+    root = root[0]
+  }
+  if (root.length && last(root) !== '/') {
+    root += '/'
+  }
+  const url = domResolve(root, filepath)
+  return url.replace(/^(\w+:\/\/[^/]+)(\/[^?]+)/, (str, origin, path) => {
+    const last = path.split('/').pop()
+    if (/\.\w+$/.test(last)) {
+      return str
+    }
+    return origin + path + options.extname
+  })
+}
+
+export async function read (url) {
+  return new Promise((resolve, reject) => {
+    const xhr = new XMLHttpRequest()
+    xhr.onload = () => {
+      if (xhr.status >= 200 && xhr.status < 300) {
+        resolve(xhr.responseText)
+      } else {
+        reject(new Error(xhr.statusText))
+      }
+    }
+    xhr.onerror = () => {
+      reject(new Error('An error occurred whilst receiving the response.'))
+    }
+    xhr.open('GET', url)
+    xhr.send()
+  })
+}

src/template.js

@@ -0,0 +1,29 @@
+import * as _ from './util/underscore.js'
+import path from 'path'
+import { anySeries } from './util/promise.js'
+import fs from 'fs'
+
+const statFileAsync = _.promisify(fs.stat)
+const readFileAsync = _.promisify(fs.readFile)
+
+export async function resolve (filepath, root, options) {
+  if (!path.extname(filepath)) {
+    filepath += options.extname
+  }
+  root = options.root.concat(root || [])
+  root = _.uniq(root)
+  const paths = root.map(root => path.resolve(root, filepath))
+  return anySeries(paths, async path => {
+    try {
+      await statFileAsync(path)
+      return path
+    } catch (e) {
+      e.message = `${e.code}: Failed to lookup ${filepath} in: ${root}`
+      throw e
+    }
+  })
+}
+
+export async function read (filepath) {
+  return readFileAsync(filepath, 'utf8')
+}

src/tokenizer.js

@@ -1,19 +1,21 @@
-const lexical = require('./lexical.js')
-const TokenizationError = require('./util/error.js').TokenizationError
-const _ = require('./util/underscore.js')
-const whiteSpaceCtrl = require('./whitespace-ctrl.js')
-const assert = require('./util/assert.js')
+import * as lexical from './lexical.js'
+import { TokenizationError } from './util/error.js'
+import * as _ from './util/underscore.js'
+import assert from './util/assert.js'
+import whiteSpaceCtrl from './whitespace-ctrl.js'
 
-function parse (input, file, options) {
+export { default as whiteSpaceCtrl } from './whitespace-ctrl.js'
+
+export function parse (input, file, options) {
   assert(_.isString(input), 'illegal input')
 
-  var rLiquid = /({%-?([\s\S]*?)-?%})|({{-?([\s\S]*?)-?}})/g
-  var currIndent = 0
-  var lineNumber = LineNumber(input)
-  var lastMatchEnd = 0
-  var tokens = []
+  const rLiquid = /({%-?([\s\S]*?)-?%})|({{-?([\s\S]*?)-?}})/g
+  let currIndent = 0
+  const lineNumber = LineNumber(input)
+  let lastMatchEnd = 0
+  const tokens = []
 
-  for (var match; (match = rLiquid.exec(input)); lastMatchEnd = rLiquid.lastIndex) {
+  for (let match; (match = rLiquid.exec(input)); lastMatchEnd = rLiquid.lastIndex) {
     if (match.index > lastMatchEnd) {
       tokens.push(parseHTMLToken(lastMatchEnd, match.index))
     }
@@ -28,8 +30,8 @@ function parse (input, file, options) {
   return tokens
 
   function parseTagToken (raw, value, pos) {
-    var match = value.match(lexical.tagLine)
-    var token = {
+    const match = value.match(lexical.tagLine)
+    const token = {
       type: 'tag',
       indent: currIndent,
       line: lineNumber.get(pos),
@@ -62,8 +64,8 @@ function parse (input, file, options) {
   }
 
   function parseHTMLToken (begin, end) {
-    var htmlFragment = input.slice(begin, end)
-    currIndent = _.last((htmlFragment || '').split('\n')).length
+    const htmlFragment = input.slice(begin, end)
+    currIndent = _.last((htmlFragment).split('\n')).length
 
     return {
       type: 'html',
@@ -74,18 +76,15 @@ function parse (input, file, options) {
 }
 
 function LineNumber (html) {
-  var parsedLinesCount = 0
-  var lastMatchBegin = -1
+  let parsedLinesCount = 0
+  let lastMatchBegin = -1
 
   return {
     get: function (pos) {
-      var lines = html.slice(lastMatchBegin + 1, pos).split('\n')
+      const lines = html.slice(lastMatchBegin + 1, pos).split('\n')
       parsedLinesCount += lines.length - 1
       lastMatchBegin = pos
       return parsedLinesCount + 1
     }
   }
 }
-
-exports.parse = parse
-exports.whiteSpaceCtrl = whiteSpaceCtrl

src/util/assert.js

@@ -1,10 +1,8 @@
-const AssertionError = require('./error.js').AssertionError
+import { AssertionError } from './error.js'
 
-function assert (predicate, message) {
+export default function (predicate, message) {
   if (!predicate) {
     message = message || `expect ${predicate} to be true`
     throw new AssertionError(message)
   }
 }
-
-module.exports = assert

src/util/error.js

@@ -1,4 +1,4 @@
-const _ = require('./underscore.js')
+import * as _ from './underscore.js'
 
 function initError () {
   this.name = this.constructor.name
@@ -14,29 +14,29 @@ function initLiquidError (err, token) {
   this.line = token.line
   this.file = token.file
 
-  var context = mkContext(token.input, token.line)
+  const context = mkContext(token.input, token.line)
   this.message = mkMessage(err.message, token)
   this.stack = context +
     '\n' + (this.stack || this.message) +
       (err.stack ? '\nFrom ' + err.stack : '')
 }
 
-function TokenizationError (message, token) {
-  initLiquidError.call(this, {message: message}, token)
+export function TokenizationError (message, token) {
+  initLiquidError.call(this, { message: message }, token)
 }
-TokenizationError.prototype = Object.create(Error.prototype)
+TokenizationError.prototype = _.create(Error.prototype)
 TokenizationError.prototype.constructor = TokenizationError
 
-function ParseError (e, token) {
+export function ParseError (e, token) {
   _.assign(this, e)
   this.originalError = e
 
   initLiquidError.call(this, e, token)
 }
-ParseError.prototype = Object.create(Error.prototype)
+ParseError.prototype = _.create(Error.prototype)
 ParseError.prototype.constructor = ParseError
 
-function RenderError (e, tpl) {
+export function RenderError (e, tpl) {
   // return the original render error
   if (e instanceof RenderError) {
     return e
@@ -46,29 +46,29 @@ function RenderError (e, tpl) {
 
   initLiquidError.call(this, e, tpl.token)
 }
-RenderError.prototype = Object.create(Error.prototype)
+RenderError.prototype = _.create(Error.prototype)
 RenderError.prototype.constructor = RenderError
 
-function RenderBreakError (message) {
+export function RenderBreakError (message) {
   initError.call(this)
   this.message = message + ''
 }
-RenderBreakError.prototype = Object.create(Error.prototype)
+RenderBreakError.prototype = _.create(Error.prototype)
 RenderBreakError.prototype.constructor = RenderBreakError
 
-function AssertionError (message) {
+export function AssertionError (message) {
   initError.call(this)
   this.message = message + ''
 }
-AssertionError.prototype = Object.create(Error.prototype)
+AssertionError.prototype = _.create(Error.prototype)
 AssertionError.prototype.constructor = AssertionError
 
 function mkContext (input, line) {
-  var lines = input.split('\n')
-  var begin = Math.max(line - 2, 1)
-  var end = Math.min(line + 3, lines.length)
+  const lines = input.split('\n')
+  const begin = Math.max(line - 2, 1)
+  const end = Math.min(line + 3, lines.length)
 
-  var context = _
+  const context = _
     .range(begin, end + 1)
     .map(l => [
       (l === line) ? '>> ' : '   ',
@@ -82,9 +82,9 @@ function mkContext (input, line) {
 }
 
 function align (n, max) {
-  var length = (max + '').length
-  var str = n + ''
-  var blank = Array(length - str.length).join(' ')
+  const length = (max + '').length
+  const str = n + ''
+  const blank = Array(length - str.length).join(' ')
   return blank + str
 }
 
@@ -98,11 +98,3 @@ function mkMessage (msg, token) {
   }
   return msg
 }
-
-module.exports = {
-  TokenizationError,
-  ParseError,
-  RenderBreakError,
-  AssertionError,
-  RenderError
-}

src/util/fs.js

@@ -1,20 +0,0 @@
-const fs = require('fs')
-
-function readFileAsync (filepath) {
-  return new Promise(function (resolve, reject) {
-    fs.readFile(filepath, 'utf8', function (err, content) {
-      err ? reject(err) : resolve(content)
-    })
-  })
-};
-
-function statFileAsync (path) {
-  return new Promise(function (resolve, reject) {
-    fs.stat(path, (err, stat) => err ? reject(err) : resolve(stat))
-  })
-};
-
-module.exports = {
-  readFileAsync,
-  statFileAsync
-}

src/util/promise.js

@@ -1,13 +1,11 @@
-const Promise = require('any-promise')
-
 /*
  * Call functions in serial until someone resolved.
  * @param {Array} iterable the array to iterate with.
  * @param {Array} iteratee returns a new promise.
  * The iteratee is invoked with three arguments: (value, index, iterable).
  */
-function anySeries (iterable, iteratee) {
-  var ret = Promise.reject(new Error('init'))
+export function anySeries (iterable, iteratee) {
+  let ret = Promise.reject(new Error('init'))
   iterable.forEach(function (item, idx) {
     ret = ret.catch(e => iteratee(item, idx, iterable))
   })
@@ -20,9 +18,9 @@ function anySeries (iterable, iteratee) {
  * @param {Array} iteratee returns a new promise.
  * The iteratee is invoked with three arguments: (value, index, iterable).
  */
-function mapSeries (iterable, iteratee) {
-  var ret = Promise.resolve('init')
-  var result = []
+export function mapSeries (iterable, iteratee) {
+  let ret = Promise.resolve('init')
+  const result = []
   iterable.forEach(function (item, idx) {
     ret = ret
       .then(() => iteratee(item, idx, iterable))
@@ -30,6 +28,3 @@ function mapSeries (iterable, iteratee) {
   })
   return ret.then(() => result)
 }
-
-exports.anySeries = anySeries
-exports.mapSeries = mapSeries

src/util/strftime.js

@@ -1,32 +1,33 @@
-var monthNames = [
+const monthNames = [
   'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August',
   'September', 'October', 'November', 'December'
 ]
-var monthNamesShort = [
-  'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct',
-  'Nov', 'Dec'
-]
-var dayNames = [
+const dayNames = [
   'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'
 ]
-var dayNamesShort = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat']
-var suffixes = {
+const monthNamesShort = monthNames.map(abbr)
+const dayNamesShort = dayNames.map(abbr)
+const suffixes = {
   1: 'st',
   2: 'nd',
   3: 'rd',
   'default': 'th'
 }
 
+function abbr (str) {
+  return str.slice(0, 3)
+}
+
 // prototype extensions
-var _date = {
+const _date = {
   daysInMonth: function (d) {
-    var feb = _date.isLeapYear(d) ? 29 : 28
+    const feb = _date.isLeapYear(d) ? 29 : 28
     return [31, feb, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
   },
 
   getDayOfYear: function (d) {
-    var num = 0
-    for (var i = 0; i < d.getMonth(); ++i) {
+    let num = 0
+    for (let i = 0; i < d.getMonth(); ++i) {
       num += _date.daysInMonth(d)[i]
     }
     return num + d.getDate()
@@ -36,21 +37,21 @@ var _date = {
   // TODO: that comment was retarted. fix it.
   getWeekOfYear: function (d, startDay) {
     // Skip to startDay of this week
-    var now = this.getDayOfYear(d) + (startDay - d.getDay())
+    const now = this.getDayOfYear(d) + (startDay - d.getDay())
     // Find the first startDay of the year
-    var jan1 = new Date(d.getFullYear(), 0, 1)
-    var then = (7 - jan1.getDay() + startDay)
+    const jan1 = new Date(d.getFullYear(), 0, 1)
+    const then = (7 - jan1.getDay() + startDay)
     return _number.pad(Math.floor((now - then) / 7) + 1, 2)
   },
 
   isLeapYear: function (d) {
-    var year = d.getFullYear()
+    const year = d.getFullYear()
     return !!((year & 3) === 0 && (year % 100 || (year % 400 === 0 && year)))
   },
 
   getSuffix: function (d) {
-    var str = d.getDate().toString()
-    var index = parseInt(str.slice(-1))
+    const str = d.getDate().toString()
+    const index = parseInt(str.slice(-1))
     return suffixes[index] || suffixes['default']
   },
 
@@ -59,11 +60,11 @@ var _date = {
   }
 }
 
-var _number = {
+const _number = {
   pad: function (value, size, ch) {
     if (!ch) ch = '0'
-    var result = value.toString()
-    var pad = size - result.length
+    let result = value.toString()
+    let pad = size - result.length
 
     while (pad-- > 0) {
       result = ch + result
@@ -73,7 +74,7 @@ var _number = {
   }
 }
 
-var formatCodes = {
+const formatCodes = {
   a: function (d) {
     return dayNamesShort[d.getDay()]
   },
@@ -162,8 +163,7 @@ var formatCodes = {
     return d.getFullYear()
   },
   z: function (d) {
-    var tz = d.getTimezoneOffset() / 60 * 100
-    console.log('tz', tz)
+    const tz = d.getTimezoneOffset() / 60 * 100
     return (tz > 0 ? '-' : '+') + _number.pad(Math.abs(tz), 4)
   },
   '%': function () {
@@ -173,13 +173,13 @@ var formatCodes = {
 formatCodes.h = formatCodes.b
 formatCodes.N = formatCodes.L
 
-var strftime = function (d, format) {
-  var output = ''
-  var remaining = format
+export default function (d, format) {
+  let output = ''
+  let remaining = format
 
   while (true) {
-    var r = /%./g
-    var results = r.exec(remaining)
+    const r = /%./g
+    const results = r.exec(remaining)
 
     // No more format codes. Add the remaining text and return
     if (!results) {
@@ -191,10 +191,8 @@ var strftime = function (d, format) {
     remaining = remaining.slice(r.lastIndex)
 
     // Add the format code
-    var ch = results[0].charAt(1)
-    var func = formatCodes[ch]
+    const ch = results[0].charAt(1)
+    const func = formatCodes[ch]
     output += func ? func.call(this, d) : '%' + ch
   }
 }
-
-module.exports = strftime

src/util/underscore.js

@@ -1,25 +1,67 @@
 const toStr = Object.prototype.toString
+const arrToStr = Array.prototype.toString
 
 /*
  * Checks if value is classified as a String primitive or object.
  * @param {any} value The value to check.
  * @return {Boolean} Returns true if value is a string, else false.
  */
-function isString (value) {
-  return value instanceof String || typeof value === 'string'
+export function isString (value) {
+  return toStr.call(value) === '[object String]'
 }
 
-function isNil (value) {
+export function isFunction (value) {
+  return typeof value === 'function'
+}
+
+export function promisify (fn) {
+  return function () {
+    return new Promise((resolve, reject) => {
+      fn(...arguments, (err, result) => {
+        err ? reject(err) : resolve(result)
+      })
+    })
+  }
+}
+
+export function stringify (value) {
+  if (isNil(value)) return String(value)
+  if (isFunction(value.to_liquid)) return stringify(value.to_liquid())
+  if (isFunction(value.toLiquid)) return stringify(value.toLiquid())
+  if (isFunction(value.to_s)) return value.to_s()
+  if ([toStr, arrToStr].indexOf(value.toString) > -1) return defaultToString(value)
+  if (isFunction(value.toString)) return value.toString()
+  return toStr.call(value)
+}
+
+function defaultToString (value) {
+  const cache = []
+  return JSON.stringify(value, (key, value) => {
+    if (isObject(value)) {
+      if (cache.indexOf(value) !== -1) {
+        return
+      }
+      cache.push(value)
+    }
+    return value
+  })
+}
+
+export function create (proto) {
+  return Object.create(proto)
+}
+
+export function isNil (value) {
   return value === null || value === undefined
 }
 
-function isArray (value) {
+export function isArray (value) {
   // be compatible with IE 8
   return toStr.call(value) === '[object Array]'
 }
 
-function isError (value) {
-  var signature = Object.prototype.toString.call(value)
+export function isError (value) {
+  const signature = toStr.call(value)
   // [object XXXError]
   return signature.substr(-6, 5) === 'Error' ||
         (typeof value.message === 'string' && typeof value.name === 'string')
@@ -33,9 +75,9 @@ function isError (value) {
  * @param {Function} iteratee The function invoked per iteration.
  * @return {Object} Returns object.
  */
-function forOwn (object, iteratee) {
+export function forOwn (object, iteratee) {
   object = object || {}
-  for (var k in object) {
+  for (const k in object) {
     if (object.hasOwnProperty(k)) {
       if (iteratee(object[k], k, object) === false) break
     }
@@ -54,30 +96,21 @@ function forOwn (object, iteratee) {
  * @param {...Object} sources The source objects.
  * @return {Object} Returns object.
  */
-function assign (object) {
+export function assign (object) {
   object = isObject(object) ? object : {}
-  var srcs = Array.prototype.slice.call(arguments, 1)
-  srcs.forEach(function (src) {
-    _assignBinary(object, src)
-  })
+  const srcs = Array.prototype.slice.call(arguments, 1)
+  srcs.forEach((src) => Object.assign(object, src))
   return object
 }
 
-function _assignBinary (dst, src) {
-  forOwn(src, function (v, k) {
-    dst[k] = v
-  })
-  return dst
-}
-
-function last (arr) {
+export function last (arr) {
   return arr[arr.length - 1]
 }
 
-function uniq (arr) {
-  var u = {}
-  var a = []
-  for (var i = 0, l = arr.length; i < l; ++i) {
+export function uniq (arr) {
+  const u = {}
+  const a = []
+  for (let i = 0, l = arr.length; i < l; ++i) {
     if (u.hasOwnProperty(arr[i])) {
       continue
     }
@@ -93,9 +126,9 @@ function uniq (arr) {
  * @param {any} value The value to check.
  * @return {Boolean} Returns true if value is an object, else false.
  */
-function isObject (value) {
-  var type = typeof value
-  return value != null && (type === 'object' || type === 'function')
+export function isObject (value) {
+  const type = typeof value
+  return value !== null && (type === 'object' || type === 'function')
 }
 
 /*
@@ -106,32 +139,16 @@ function isObject (value) {
  * Note that ranges that stop before they start are considered to be zero-length instead of
  * negative — if you'd like a negative range, use a negative step.
  */
-function range (start, stop, step) {
+export function range (start, stop, step) {
   if (arguments.length === 1) {
     stop = start
     start = 0
   }
   step = step || 1
 
-  var arr = []
-  for (var i = start; i < stop; i += step) {
+  const arr = []
+  for (let i = start; i < stop; i += step) {
     arr.push(i)
   }
   return arr
 }
-
-// lang
-exports.isString = isString
-exports.isObject = isObject
-exports.isArray = isArray
-exports.isNil = isNil
-exports.isError = isError
-
-// array
-exports.range = range
-exports.last = last
-
-// object
-exports.forOwn = forOwn
-exports.assign = assign
-exports.uniq = uniq

src/whitespace-ctrl.js

@@ -1,8 +1,8 @@
-const _ = require('./util/underscore.js')
+import { assign } from './util/underscore.js'
 
-function whiteSpaceCtrl (tokens, options) {
-  options = _.assign({ greedy: true }, options)
-  var inRaw = false
+export default function whiteSpaceCtrl (tokens, options) {
+  options = assign({ greedy: true }, options)
+  let inRaw = false
 
   tokens.forEach((token, i) => {
     if (shouldTrimLeft(token, inRaw, options)) {
@@ -33,16 +33,13 @@ function shouldTrimRight (token, inRaw, options) {
 function trimLeft (token, greedy) {
   if (!token || token.type !== 'html') return
 
-  console.log('trimming', token.value)
-  var rLeft = greedy ? /\s+$/g : /[\t\r ]*$/g
+  const rLeft = greedy ? /\s+$/g : /[\t\r ]*$/g
   token.value = token.value.replace(rLeft, '')
 }
 
 function trimRight (token, greedy) {
   if (!token || token.type !== 'html') return
 
-  var rRight = greedy ? /^\s+/g : /^[\t\r ]*\n?/g
+  const rRight = greedy ? /^\s+/g : /^[\t\r ]*\n?/g
   token.value = token.value.replace(rRight, '')
 }
-
-module.exports = whiteSpaceCtrl

tags/assign.js

@@ -1,20 +0,0 @@
-const Liquid = require('..')
-const lexical = Liquid.lexical
-const Promise = require('any-promise')
-const re = new RegExp(`(${lexical.identifier.source})\\s*=(.*)`)
-const assert = require('../src/util/assert.js')
-
-module.exports = function (liquid) {
-  liquid.registerTag('assign', {
-    parse: function (token) {
-      var match = token.args.match(re)
-      assert(match, `illegal token ${token.raw}`)
-      this.key = match[1]
-      this.value = match[2]
-    },
-    render: function (scope) {
-      scope.set(this.key, liquid.evalValue(this.value, scope))
-      return Promise.resolve('')
-    }
-  })
-}

tags/capture.js

@@ -1,32 +0,0 @@
-const Liquid = require('..');
-const lexical = Liquid.lexical;
-const re = new RegExp(`(${lexical.identifier.source})`);
-const assert = require('../src/util/assert.js');
-
-module.exports = function(liquid) {
-
-    liquid.registerTag('capture', {
-        parse: function(tagToken, remainTokens) {
-            var match = tagToken.args.match(re);
-            assert(match, `${tagToken.args} not valid identifier`);
-
-            this.variable = match[1];
-            this.templates = [];
-
-            var stream = liquid.parser.parseStream(remainTokens);
-            stream.on('tag:endcapture', token => stream.stop())
-                .on('template', tpl => this.templates.push(tpl))
-                .on('end', x => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
-            stream.start();
-        },
-        render: function(scope, hash) {
-            return liquid.renderer.renderTemplates(this.templates, scope)
-                .then((html) => {
-                    scope.set(this.variable, html);
-                });
-        }
-    });
-
-};

tags/comment.js

@@ -1,17 +0,0 @@
-module.exports = function(liquid) {
-
-    liquid.registerTag('comment', {
-        parse: function(tagToken, remainTokens) {
-            var stream = liquid.parser.parseStream(remainTokens);
-            stream
-                .on('token', token => {
-                    if(token.name === 'endcomment') stream.stop();
-                })
-                .on('end', x => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
-            stream.start();
-        }
-    });
-
-};

tags/cycle.js

@@ -1,44 +0,0 @@
-const Liquid = require('..')
-const Promise = require('any-promise')
-const lexical = Liquid.lexical
-const groupRE = new RegExp(`^(?:(${lexical.value.source})\\s*:\\s*)?(.*)$`)
-const candidatesRE = new RegExp(lexical.value.source, 'g')
-const assert = require('../src/util/assert.js')
-
-module.exports = function (liquid) {
-  liquid.registerTag('cycle', {
-
-    parse: function (tagToken, remainTokens) {
-      var match = groupRE.exec(tagToken.args)
-      assert(match, `illegal tag: ${tagToken.raw}`)
-
-      this.group = match[1] || ''
-      var candidates = match[2]
-
-      this.candidates = []
-
-      while ((match = candidatesRE.exec(candidates))) {
-        this.candidates.push(match[0])
-      }
-      assert(this.candidates.length, `empty candidates: ${tagToken.raw}`)
-    },
-
-    render: function (scope, hash) {
-      var group = Liquid.evalValue(this.group, scope)
-      var fingerprint = `cycle:${group}:` + this.candidates.join(',')
-
-      var groups = scope.opts.groups = scope.opts.groups || {}
-      var idx = groups[fingerprint]
-
-      if (idx === undefined) {
-        idx = groups[fingerprint] = 0
-      }
-
-      var candidate = this.candidates[idx]
-      idx = (idx + 1) % this.candidates.length
-      groups[fingerprint] = idx
-
-      return Promise.resolve(Liquid.evalValue(candidate, scope))
-    }
-  })
-}

tags/decrement.js

@@ -1,20 +0,0 @@
-const Liquid = require('..');
-const lexical = Liquid.lexical;
-const assert = require('../src/util/assert.js');
-
-module.exports = function(liquid) {
-
-    liquid.registerTag('decrement', {
-        parse: function(token) {
-            var match = token.args.match(lexical.identifier);
-            assert(match, `illegal identifier ${token.args}`);
-            this.variable = match[0];
-        },
-        render: function(scope, hash) {
-            var v = scope.get(this.variable);
-            if (typeof v !== 'number') v = 0;
-            scope.set(this.variable, v - 1);
-        }
-    });
-
-};

tags/for.js

@@ -1,97 +0,0 @@
-const Liquid = require('..')
-const lexical = Liquid.lexical
-const mapSeries = require('../src/util/promise.js').mapSeries
-const _ = require('../src/util/underscore.js')
-const RenderBreakError = Liquid.Types.RenderBreakError
-const assert = require('../src/util/assert.js')
-const re = new RegExp(`^(${lexical.identifier.source})\\s+in\\s+` +
-    `(${lexical.value.source})` +
-    `(?:\\s+${lexical.hash.source})*` +
-    `(?:\\s+(reversed))?` +
-    `(?:\\s+${lexical.hash.source})*$`)
-
-module.exports = function (liquid) {
-  liquid.registerTag('for', {
-
-    parse: function (tagToken, remainTokens) {
-      var match = re.exec(tagToken.args)
-      assert(match, `illegal tag: ${tagToken.raw}`)
-      this.variable = match[1]
-      this.collection = match[2]
-      this.reversed = !!match[3]
-
-      this.templates = []
-      this.elseTemplates = []
-
-      var p
-      var stream = liquid.parser.parseStream(remainTokens)
-        .on('start', () => (p = this.templates))
-        .on('tag:else', () => (p = this.elseTemplates))
-        .on('tag:endfor', () => stream.stop())
-        .on('template', tpl => p.push(tpl))
-        .on('end', () => {
-          throw new Error(`tag ${tagToken.raw} not closed`)
-        })
-
-      stream.start()
-    },
-
-    render: function (scope, hash) {
-      var collection = Liquid.evalExp(this.collection, scope)
-
-      if (!Array.isArray(collection)) {
-        if (_.isString(collection) && collection.length > 0) {
-          collection = [collection]
-        } else if (_.isObject(collection)) {
-          collection = Object.keys(collection).map((key) => [key, collection[key]])
-        }
-      }
-      if (!Array.isArray(collection) || !collection.length) {
-        return liquid.renderer.renderTemplates(this.elseTemplates, scope)
-      }
-
-      var length = collection.length
-      var offset = hash.offset || 0
-      var limit = (hash.limit === undefined) ? collection.length : hash.limit
-
-      collection = collection.slice(offset, offset + limit)
-      if (this.reversed) collection.reverse()
-
-      var contexts = collection.map((item, i) => {
-        var ctx = {}
-        ctx[this.variable] = item
-        ctx.forloop = {
-          first: i === 0,
-          index: i + 1,
-          index0: i,
-          last: i === length - 1,
-          length: length,
-          rindex: length - i,
-          rindex0: length - i - 1
-        }
-        return ctx
-      })
-
-      var html = ''
-      return mapSeries(contexts, (context) => {
-        return Promise.resolve()
-          .then(() => scope.push(context))
-          .then(() => liquid.renderer.renderTemplates(this.templates, scope))
-          .then(partial => (html += partial))
-          .catch(e => {
-            if (e instanceof RenderBreakError) {
-              html += e.resolvedHTML
-              if (e.message === 'continue') return
-            }
-            throw e
-          })
-          .then(() => scope.pop())
-      }).catch((e) => {
-        if (e instanceof RenderBreakError && e.message === 'break') {
-          return
-        }
-        throw e
-      }).then(() => html)
-    }
-  })
-}

tags/include.js

@@ -1,42 +0,0 @@
-const Liquid = require('..')
-const lexical = Liquid.lexical
-const withRE = new RegExp(`with\\s+(${lexical.value.source})`)
-const assert = require('../src/util/assert.js')
-
-module.exports = function (liquid) {
-  liquid.registerTag('include', {
-    parse: function (token) {
-      var match = lexical.value.exec(token.args)
-      assert(match, `illegal token ${token.raw}`)
-      this.value = match[0]
-
-      match = withRE.exec(token.args)
-      if (match) {
-        this.with = match[1]
-      }
-    },
-    render: function (scope, hash) {
-      var filepath = Liquid.evalValue(this.value, scope)
-
-      var originBlocks = scope.opts.blocks
-      var originBlockMode = scope.opts.blockMode
-      scope.opts.blocks = {}
-      scope.opts.blockMode = 'output'
-
-      if (this.with) {
-        hash[filepath] = Liquid.evalValue(this.with, scope)
-      }
-      return liquid.getTemplate(filepath, scope.opts.root)
-        .then((templates) => {
-          scope.push(hash)
-          return liquid.renderer.renderTemplates(templates, scope)
-        })
-        .then((html) => {
-          scope.pop()
-          scope.opts.blocks = originBlocks
-          scope.opts.blockMode = originBlockMode
-          return html
-        })
-    }
-  })
-}

tags/increment.js

@@ -1,20 +0,0 @@
-const Liquid = require('..');
-const assert = require('../src/util/assert.js');
-const lexical = Liquid.lexical;
-
-module.exports = function(liquid) {
-
-    liquid.registerTag('increment', {
-        parse: function(token) {
-            var match = token.args.match(lexical.identifier);
-            assert(match, `illegal identifier ${token.args}`);
-            this.variable = match[0];
-        },
-        render: function(scope, hash) {
-            var v = scope.get(this.variable);
-            if (typeof v !== 'number') v = 0;
-            scope.set(this.variable, v + 1);
-        }
-    });
-
-};

tags/index.js

@@ -1,16 +0,0 @@
-module.exports = function (engine) {
-  require('./assign.js')(engine)
-  require('./capture.js')(engine)
-  require('./case.js')(engine)
-  require('./comment.js')(engine)
-  require('./cycle.js')(engine)
-  require('./decrement.js')(engine)
-  require('./for.js')(engine)
-  require('./if.js')(engine)
-  require('./include.js')(engine)
-  require('./increment.js')(engine)
-  require('./layout.js')(engine)
-  require('./raw.js')(engine)
-  require('./tablerow.js')(engine)
-  require('./unless.js')(engine)
-}

tags/layout.js

@@ -1,77 +0,0 @@
-const Liquid = require('..')
-const Promise = require('any-promise')
-const lexical = Liquid.lexical
-const assert = require('../src/util/assert.js')
-
-/*
- * blockMode:
- * * "store": store rendered html into blocks
- * * "output": output rendered html
- */
-
-module.exports = function (liquid) {
-  liquid.registerTag('layout', {
-    parse: function (token, remainTokens) {
-      var match = lexical.value.exec(token.args)
-      assert(match, `illegal token ${token.raw}`)
-
-      this.layout = match[0]
-      this.tpls = liquid.parser.parse(remainTokens)
-    },
-    render: function (scope, hash) {
-      var layout = Liquid.evalValue(this.layout, scope)
-
-      // render the remaining tokens immediately
-      scope.opts.blockMode = 'store'
-      return liquid.renderer.renderTemplates(this.tpls, scope)
-        .then(html => {
-          if (scope.opts.blocks[''] === undefined) {
-            scope.opts.blocks[''] = html
-          }
-          return liquid.getTemplate(layout, scope.opts.root)
-        })
-        .then(templates => {
-          // push the hash
-          scope.push(hash)
-          scope.opts.blockMode = 'output'
-          return liquid.renderer.renderTemplates(templates, scope)
-        })
-        // pop the hash
-        .then(partial => {
-          scope.pop()
-          return partial
-        })
-    }
-  })
-
-  liquid.registerTag('block', {
-    parse: function (token, remainTokens) {
-      var match = /\w+/.exec(token.args)
-      this.block = match ? match[0] : ''
-
-      this.tpls = []
-      var stream = liquid.parser.parseStream(remainTokens)
-        .on('tag:endblock', () => stream.stop())
-        .on('template', tpl => this.tpls.push(tpl))
-        .on('end', () => {
-          throw new Error(`tag ${token.raw} not closed`)
-        })
-      stream.start()
-    },
-    render: function (scope) {
-      return Promise.resolve(scope.opts.blocks[this.block])
-        .then(html => html === undefined
-          // render default block
-          ? liquid.renderer.renderTemplates(this.tpls, scope)
-          // use child-defined block
-          : html)
-        .then(html => {
-          if (scope.opts.blockMode === 'store') {
-            scope.opts.blocks[this.block] = html
-            return ''
-          }
-          return html
-        })
-    }
-  })
-}

tags/tablerow.js

@@ -1,84 +0,0 @@
-const Liquid = require('..')
-const mapSeries = require('../src/util/promise.js').mapSeries
-const lexical = Liquid.lexical
-const assert = require('../src/util/assert.js')
-const re = new RegExp(`^(${lexical.identifier.source})\\s+in\\s+` +
-  `(${lexical.value.source})` +
-  `(?:\\s+${lexical.hash.source})*$`)
-
-module.exports = function (liquid) {
-  liquid.registerTag('tablerow', {
-
-    parse: function (tagToken, remainTokens) {
-      var match = re.exec(tagToken.args)
-      assert(match, `illegal tag: ${tagToken.raw}`)
-
-      this.variable = match[1]
-      this.collection = match[2]
-      this.templates = []
-
-      var p
-      var stream = liquid.parser.parseStream(remainTokens)
-        .on('start', () => (p = this.templates))
-        .on('tag:endtablerow', token => stream.stop())
-        .on('template', tpl => p.push(tpl))
-        .on('end', () => {
-          throw new Error(`tag ${tagToken.raw} not closed`)
-        })
-
-      stream.start()
-    },
-
-    render: function (scope, hash) {
-      var collection = Liquid.evalExp(this.collection, scope) || []
-
-      var html = '<table>'
-      var offset = hash.offset || 0
-      var limit = (hash.limit === undefined) ? collection.length : hash.limit
-
-      var cols = hash.cols
-      var row
-      var col
-      if (!cols) throw new Error(`illegal cols: ${cols}`)
-
-      // build array of arguments to pass to sequential promises...
-      collection = collection.slice(offset, offset + limit)
-      var contexts = []
-      collection.some((item, i) => {
-        var ctx = {}
-        ctx[this.variable] = item
-        contexts.push(ctx)
-      })
-
-      return mapSeries(contexts,
-        (context, idx) => {
-          row = Math.floor(idx / cols) + 1
-          col = (idx % cols) + 1
-          if (col === 1) {
-            if (row !== 1) {
-              html += '</tr>'
-            }
-            html += `<tr class="row${row}">`
-          }
-
-          html += `<td class="col${col}">`
-          scope.push(context)
-          return liquid.renderer
-            .renderTemplates(this.templates, scope)
-            .then((partial) => {
-              scope.pop(context)
-              html += partial
-              html += '</td>'
-              return html
-            })
-        })
-        .then(() => {
-          if (row > 0) {
-            html += '</tr>'
-          }
-          html += '</table>'
-          return html
-        })
-    }
-  })
-}

tags/unless.js

@@ -1,30 +0,0 @@
-const Liquid = require('..');
-
-module.exports = function(liquid) {
-    liquid.registerTag('unless', {
-        parse: function(tagToken, remainTokens) {
-            this.templates = [];
-            this.elseTemplates = [];
-            var p, stream = liquid.parser.parseStream(remainTokens)
-                .on('start', x => {
-                    p = this.templates;
-                    this.cond = tagToken.args;
-                })
-                .on('tag:else', token => p = this.elseTemplates)
-                .on('tag:endunless', token => stream.stop())
-                .on('template', tpl => p.push(tpl))
-                .on('end', x => {
-                    throw new Error(`tag ${tagToken.raw} not closed`);
-                });
-
-            stream.start();
-        },
-
-        render: function(scope, hash) {
-            var cond = Liquid.evalExp(this.cond, scope);
-            return Liquid.isFalsy(cond) ?
-                liquid.renderer.renderTemplates(this.templates, scope) :
-                liquid.renderer.renderTemplates(this.elseTemplates, scope);
-        }
-    });
-};

test/e2e/.eslintrc.json

@@ -0,0 +1,6 @@
+{
+  "rules": {
+    "no-var": 0,
+    "prefer-const": 0
+  }
+}

test/e2e/express.js

@@ -1,9 +1,12 @@
 const chai = require('chai')
-const expect = chai.expect
-const mock = require('mock-fs')
 const request = require('supertest')
 const express = require('express')
-const Liquid = require('..')
+const mock = require('mock-fs')
+const Liquid = require('../../dist/liquid.common.js')
+const chaiAsPromised = require('chai-as-promised')
+
+const expect = chai.expect
+chai.use(chaiAsPromised)
 
 describe('engine#express()', function () {
   var app, engine
@@ -36,11 +39,11 @@ describe('engine#express()', function () {
       .expect(200, done)
   })
   it('should pass error when file not found', function (done) {
-    var view = {
+    const view = {
       root: []
     }
-    var file = '/not-exist.html'
-    var ctx = {}
+    const file = '/not-exist.html'
+    const ctx = {}
     engine.express().call(view, file, ctx, function (err) {
       try {
         expect(err.code).to.equal('ENOENT')
@@ -82,7 +85,7 @@ describe('engine#express()', function () {
       .expect(200, done)
   })
   it('should respect express views (Undefined) when lookup', function (done) {
-    var files = {}
+    const files = {}
     files[process.cwd() + '/views/include.html'] = '{% include file %}'
     files[process.cwd() + '/views/bar.html'] = 'bar'
     mock(files)

test/e2e/parse-and-render.js

@@ -0,0 +1,59 @@
+var chai = require('chai')
+var Liquid = require('../..')
+var expect = chai.expect
+
+chai.use(require('chai-as-promised'))
+
+describe('.parseAndRender()', function () {
+  var engine, strictEngine
+  beforeEach(function () {
+    engine = Liquid()
+    strictEngine = Liquid({
+      strict_filters: true
+    })
+  })
+  it('should value object', function () {
+    var ctx = { obj: { foo: 'bar' } }
+    return expect(engine.parseAndRender('{{obj}}', ctx)).to.eventually.equal('{"foo":"bar"}')
+  })
+  it('should value array', function () {
+    var ctx = { arr: [-2, 'a'] }
+    return expect(engine.parseAndRender('{{arr}}', ctx)).to.eventually.equal('[-2,"a"]')
+  })
+  it('should value undefined to empty', function () {
+    return expect(engine.parseAndRender('foo{{zzz}}bar', {})).to.eventually.equal('foobar')
+  })
+  it('should render as null when filter undefined', function () {
+    return expect(engine.parseAndRender('{{"foo" | filter1}}', {})).to.eventually.equal('foo')
+  })
+  it('should throw upon undefined filter when strict_filters set', function () {
+    return expect(strictEngine.parseAndRender('{{"foo" | filter1}}', {})).to
+      .be.rejectedWith(/undefined filter: filter1/)
+  })
+  it('should parse html', function () {
+    expect(function () {
+      engine.parse('{{obj}}')
+    }).to.not.throw()
+    expect(function () {
+      engine.parse('<html><head>{{obj}}</head></html>')
+    }).to.not.throw()
+  })
+  it('should render template multiple times', function () {
+    var ctx = { obj: { foo: 'bar' } }
+    var template = engine.parse('{{obj}}')
+    return engine.render(template, ctx)
+      .then(result => expect(result).to.equal('{"foo":"bar"}'))
+      .then(() => engine.render(template, ctx))
+      .then((result) => expect(result).to.equal('{"foo":"bar"}'))
+  })
+  it('should render filters', function () {
+    var ctx = { names: ['alice', 'bob'] }
+    var template = engine.parse('<p>{{names | join: ","}}</p>')
+    return expect(engine.render(template, ctx)).to.eventually.equal('<p>alice,bob</p>')
+  })
+  it('should render accessive filters', function () {
+    var src = '{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}' +
+      '{{ my_array | first }}'
+    return expect(engine.parseAndRender(src)).to.eventually.equal('apples')
+  })
+})

test/e2e/render-file.js

@@ -0,0 +1,78 @@
+var chai = require('chai')
+var mock = require('mock-fs')
+var Liquid = require('../..')
+var expect = chai.expect
+
+chai.use(require('chai-as-promised'))
+
+describe('#renderFile()', function () {
+  var engine
+  beforeEach(function () {
+    engine = Liquid({
+      root: '/root/',
+      extname: '.html'
+    })
+    mock({
+      '/root/files/bar': 'bar',
+      '/root/files/foo.html': 'foo',
+      '/root/files/name.html': 'My name is {{name}}.',
+      '/un-readable.html': mock.file({
+        mode: '0000'
+      })
+    })
+  })
+  afterEach(function () {
+    mock.restore()
+  })
+  it('should render file', function () {
+    return expect(engine.renderFile('/root/files/foo.html', {}))
+      .to.eventually.equal('foo')
+  })
+  it('should find files without extname', function () {
+    var engine = Liquid({ root: '/root' })
+    return expect(engine.renderFile('/root/files/bar', {}))
+      .to.eventually.equal('bar')
+  })
+  it('should accept relative path', function () {
+    return expect(engine.renderFile('files/foo.html'))
+      .to.eventually.equal('foo')
+  })
+  it('should resolve array as root', function () {
+    engine = Liquid({
+      root: ['/boo', '/root/'],
+      extname: '.html'
+    })
+    return expect(engine.renderFile('files/foo.html'))
+      .to.eventually.equal('foo')
+  })
+  it('should default root to cwd', function () {
+    var files = {}
+    files[process.cwd() + '/foo.html'] = 'FOO'
+    mock(files)
+
+    engine = Liquid({
+      extname: '.html'
+    })
+    return expect(engine.renderFile('foo.html'))
+      .to.eventually.equal('FOO')
+  })
+  it('should render file with context', function () {
+    return expect(engine.renderFile('/root/files/name.html', { name: 'harttle' }))
+      .to.eventually.equal('My name is harttle.')
+  })
+  it('should use default extname', function () {
+    return expect(engine.renderFile('files/name', { name: 'harttle' })).to.eventually.equal('My name is harttle.')
+  })
+  it('should throw with lookup list when file not exist', function () {
+    engine = Liquid({
+      root: ['/boo', '/root/'],
+      extname: '.html'
+    })
+    return expect(engine.renderFile('/not/exist.html')).to
+      .be.rejectedWith(/failed to lookup \/not\/exist.html in: \/boo,\/root\//i)
+  })
+  it('should throw when file not readable', function () {
+    return expect(engine.renderFile('/un-readable.html')).to
+      .be.rejectedWith(/EACCES/)
+  })
+})

test/e2e/whitespace-ctrl.js

@@ -1,7 +1,7 @@
 const chai = require('chai')
-const expect = chai.expect
-const Liquid = require('..')
+const Liquid = require('../..')
 const liquid = new Liquid()
+const expect = chai.expect
 chai.use(require('chai-as-promised'))
 
 const cases = [

test/e2e/xhr.js

@@ -0,0 +1,161 @@
+var Liquid = require('../../dist/liquid.js')
+var sinon = require('sinon')
+var chai = require('chai')
+var expect = chai.expect
+chai.use(require('chai-as-promised'))
+
+describe('xhr', () => {
+  if (process.version.match(/^v(\d+)/)[1] < 8) {
+    console.info('jsdom not supported, skipping xhr...')
+    return
+  }
+  var JSDOM = require('jsdom').JSDOM
+  var server, engine
+  beforeEach(() => {
+    server = sinon.createFakeServer()
+    server.autoRespond = true
+    server.respondWith('GET', 'https://example.com/views/hello.html',
+      [200, { 'Content-Type': 'text/plain' }, 'hello {{name}}'])
+    var dom = new JSDOM('', {
+      url: 'https://example.com/foo/bar.html',
+      contentType: 'text/html',
+      includeNodeLocations: true
+    })
+    global.XMLHttpRequest = sinon.useFakeXMLHttpRequest()
+    global.document = dom.window.document
+    engine = Liquid({
+      root: 'https://example.com/views/',
+      extname: '.html'
+    })
+  })
+  afterEach(() => {
+    server.restore()
+    delete global.XMLHttpRequest
+    delete global.document
+  })
+  describe('#renderFile()', () => {
+    it('should support without extname', () => {
+      return expect(engine.renderFile('hello', { name: 'alice1' }))
+        .to.eventually.equal('hello alice1')
+    })
+    it('should support with extname', () => {
+      return expect(engine.renderFile('hello.html', { name: 'alice2' }))
+        .to.eventually.equal('hello alice2')
+    })
+    it('should support with absolute path', () => {
+      server.respondWith('GET', 'https://example.com/foo.html',
+        [200, { 'Content-Type': 'text/plain' }, 'foo'])
+      return expect(engine.renderFile('/foo.html'))
+        .to.eventually.equal('foo')
+    })
+    it('should support with url', () => {
+      return expect(engine.renderFile('https://example.com/views/hello.html', { name: 'alice4' }))
+        .to.eventually.equal('hello alice4')
+    })
+    it('should support include', () => {
+      server.respondWith('GET', 'https://example.com/views/hello.html',
+        [200, { 'Content-Type': 'text/plain' }, "hello {% include 'name.html' %}"])
+      server.respondWith('GET', 'https://example.com/views/name.html',
+        [200, { 'Content-Type': 'text/plain' }, '{{name}}'])
+      return expect(engine.renderFile('hello.html', { name: 'alice5' }))
+        .to.eventually.equal('hello alice5')
+    })
+    it('should throw 404', () => {
+      return expect(engine.renderFile('/not/exist.html'))
+        .to.be.rejectedWith('Not Found')
+    })
+    it('should throw error', function (done) {
+      engine.renderFile('hello.html')
+        .then(() => done('should not be resolved'))
+        .catch(function (e) {
+          expect(e.message).to.equal('An error occurred whilst receiving the response.')
+          done()
+        })
+      global.XMLHttpRequest.onCreate = function (request) {
+        setTimeout(() => request.error())
+      }
+    })
+  })
+  describe('#renderFile() with root specified', () => {
+    it('should support undefined root', () => {
+      engine = Liquid({
+        extname: '.html'
+      })
+      server.respondWith('GET', 'https://example.com/foo/hello.html',
+        [200, { 'Content-Type': 'text/plain' }, 'hello {{name}}'])
+      return expect(engine.renderFile('hello.html', { name: 'alice5' }))
+        .to.eventually.equal('hello alice5')
+    })
+    it('should support empty root', () => {
+      engine = Liquid({
+        root: '',
+        extname: '.html'
+      })
+      server.respondWith('https://example.com/foo/hello.html',
+        [200, { 'Content-Type': 'text/plain' }, 'hello {{name}}'])
+      return expect(engine.renderFile('hello.html', { name: 'alice5' }))
+        .to.eventually.equal('hello alice5')
+    })
+    it('should support with relative path', () => {
+      engine = Liquid({
+        root: './views/',
+        extname: '.html'
+      })
+      server.respondWith('GET', 'https://example.com/foo/views/hello.html',
+        [200, { 'Content-Type': 'text/plain' }, 'hello {{name}}'])
+      return expect(engine.renderFile('hello.html', { name: 'alice5' }))
+        .to.eventually.equal('hello alice5')
+    })
+    it('should support with absolute path', () => {
+      engine = Liquid({
+        root: '/views/',
+        extname: '.html'
+      })
+      server.respondWith('GET', 'https://example.com/views/hello.html',
+        [200, { 'Content-Type': 'text/plain' }, 'hello {{name}}'])
+      return expect(engine.renderFile('hello.html', { name: 'alice5' }))
+        .to.eventually.equal('hello alice5')
+    })
+    it('should support with url', () => {
+      engine = Liquid({
+        root: 'https://foo.com/bar/',
+        extname: '.html'
+      })
+      server.respondWith('GET', 'https://foo.com/bar/hello.html',
+        [200, { 'Content-Type': 'text/plain' }, 'hello {{name}}'])
+      return expect(engine.renderFile('hello.html', { name: 'alice5' }))
+        .to.eventually.equal('hello alice5')
+    })
+  })
+  describe('cache options', () => {
+    it('should be disabled by default', () => {
+      server.respondWith('GET', 'https://example.com/views/foo.html',
+        [200, { 'Content-Type': 'text/plain' }, 'foo1'])
+      return engine.renderFile('foo.html')
+        .then((html) => {
+          expect(html).to.equal('foo1')
+          server.respondWith('GET', 'https://example.com/views/foo.html',
+            [200, { 'Content-Type': 'text/plain' }, 'foo2'])
+          return engine.renderFile('foo.html')
+        })
+        .then(html => expect(html).to.equal('foo2'))
+    })
+    it('should respect cache=true option', () => {
+      engine = Liquid({
+        root: '/views/',
+        extname: '.html',
+        cache: true
+      })
+      server.respondWith('GET', 'https://example.com/views/foo.html',
+        [200, { 'Content-Type': 'text/plain' }, 'foo1'])
+      return engine.renderFile('foo.html')
+        .then((html) => {
+          expect(html).to.equal('foo1')
+          server.respondWith('GET', 'https://example.com/views/foo.html',
+            [200, { 'Content-Type': 'text/plain' }, 'foo2'])
+          return engine.renderFile('foo.html')
+        })
+        .then(html => expect(html).to.equal('foo1'))
+    })
+  })
+})

test/filter.js

@@ -1,57 +0,0 @@
-const chai = require('chai')
-const sinon = require('sinon')
-const sinonChai = require('sinon-chai')
-const expect = chai.expect
-
-chai.use(sinonChai)
-
-var filter = require('../src/filter.js')()
-var Scope = require('../src/scope.js')
-
-describe('filter', function () {
-  var scope
-  beforeEach(function () {
-    filter.clear()
-    scope = Scope.factory()
-  })
-  it('should return default filter when not registered', function () {
-    var result = filter.construct('foo')
-    expect(result.name).to.equal('foo')
-  })
-
-  it('should throw when filter name illegal', function () {
-    expect(function () {
-      filter.construct('/')
-    }).to.throw(/illegal filter/)
-  })
-
-  it('should parse argument syntax', function () {
-    filter.register('foo', x => x)
-    var f = filter.construct('foo: a, "b"')
-
-    expect(f.name).to.equal('foo')
-    expect(f.args).to.deep.equal(['a', '"b"'])
-  })
-
-  it('should register a simple filter', function () {
-    filter.register('upcase', x => x.toUpperCase())
-    expect(filter.construct('upcase').render('foo', scope)).to.equal('FOO')
-  })
-
-  it('should register a argumented filter', function () {
-    filter.register('add', (a, b) => a + b)
-    expect(filter.construct('add: 2').render(3, scope)).to.equal(5)
-  })
-
-  it('should register a multi-argumented filter', function () {
-    filter.register('add', (a, b, c) => a + b + c)
-    expect(filter.construct('add: 2, "c"').render(3, scope)).to.equal('5c')
-  })
-
-  it('should call filter with corrct arguments', function () {
-    var spy = sinon.spy()
-    filter.register('foo', spy)
-    filter.construct('foo: 33').render('foo', scope)
-    expect(spy).to.have.been.calledWith('foo', 33)
-  })
-})

test/liquid.js

@@ -1,142 +0,0 @@
-const chai = require('chai')
-const expect = chai.expect
-const Liquid = require('..')
-const mock = require('mock-fs')
-chai.use(require('chai-as-promised'))
-
-describe('liquid', function () {
-  var engine, strictEngine, ctx
-  beforeEach(function () {
-    ctx = {
-      name: 'harttle',
-      arr: [-2, 'a'],
-      obj: {
-        foo: 'bar'
-      }
-    }
-    engine = Liquid({
-      root: '/root/',
-      extname: '.html'
-    })
-    strictEngine = Liquid({
-      root: '/root',
-      extname: '.html',
-      strict_filters: true
-    })
-    mock({
-      '/root/files/bar': 'bar',
-      '/root/files/foo.html': 'foo',
-      '/root/files/name.html': 'My name is {{name}}.',
-      '/un-readable.html': mock.file({
-        mode: '0000'
-      })
-    })
-  })
-  afterEach(function () {
-    mock.restore()
-  })
-  describe('Liquid', function () {
-    it('should ignore invalid root option', function () {
-      var liquid = Liquid({ root: /regex/ })
-      expect(liquid.options.root).to.deep.equal([])
-    })
-  })
-  describe('{{value}}', function () {
-    it('should value object', function () {
-      return expect(engine.parseAndRender('{{obj}}', ctx)).to.eventually.equal('{"foo":"bar"}')
-    })
-    it('should value array', function () {
-      return expect(engine.parseAndRender('{{arr}}', ctx)).to.eventually.equal('[-2,"a"]')
-    })
-    it('should value undefined to empty', function () {
-      return expect(engine.parseAndRender('foo{{zzz}}bar', ctx)).to.eventually.equal('foobar')
-    })
-    it('should render as null when filter undefined', function () {
-      return expect(engine.parseAndRender('{{"foo" | filter1}}', ctx)).to.eventually.equal('foo')
-    })
-    it('should throw upon undefined filter when strict_filters set', function () {
-      return expect(strictEngine.parseAndRender('{{arr | filter1}}', ctx)).to
-        .be.rejectedWith(/undefined filter: filter1/)
-    })
-  })
-  it('should parse html', function () {
-    expect(function () {
-      engine.parse('{{obj}}')
-    }).to.not.throw()
-    expect(function () {
-      engine.parse('<html><head>{{obj}}</head></html>')
-    }).to.not.throw()
-  })
-  it('should render template multiple times', function () {
-    var template = engine.parse('{{obj}}')
-    return engine.render(template, ctx)
-      .then((result) => {
-        expect(result).to.equal('{"foo":"bar"}')
-        return engine.render(template, ctx)
-      })
-      .then((result) => {
-        return expect(result).to.equal('{"foo":"bar"}')
-      })
-  })
-  it('should render filters', function () {
-    var template = engine.parse('<p>{{arr | join: "_"}}</p>')
-    return expect(engine.render(template, ctx)).to.eventually.equal('<p>-2_a</p>')
-  })
-  it('should render accessive filters', function () {
-    var src = '{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}' +
-      '{{ my_array | first }}'
-    return expect(engine.parseAndRender(src)).to.eventually.equal('apples')
-  })
-  describe('#renderFile()', function () {
-    it('should render file', function () {
-      return expect(engine.renderFile('/root/files/foo.html', ctx))
-        .to.eventually.equal('foo')
-    })
-    it('should find files without extname', function () {
-      var engine = Liquid({root: '/root'})
-      return expect(engine.renderFile('/root/files/bar', ctx))
-        .to.eventually.equal('bar')
-    })
-    it('should accept relative path', function () {
-      return expect(engine.renderFile('files/foo.html'))
-        .to.eventually.equal('foo')
-    })
-    it('should resolve array as root', function () {
-      engine = Liquid({
-        root: ['/boo', '/root/'],
-        extname: '.html'
-      })
-      return expect(engine.renderFile('files/foo.html'))
-        .to.eventually.equal('foo')
-    })
-    it('should default root to cwd', function () {
-      var files = {}
-      files[process.cwd() + '/foo.html'] = 'FOO'
-      mock(files)
-
-      engine = Liquid({
-        extname: '.html'
-      })
-      return expect(engine.renderFile('foo.html'))
-        .to.eventually.equal('FOO')
-    })
-    it('should render file with context', function () {
-      return expect(engine.renderFile('/root/files/name.html', ctx)).to.eventually.equal('My name is harttle.')
-    })
-    it('should use default extname', function () {
-      return expect(engine.renderFile('files/name', ctx)).to.eventually.equal('My name is harttle.')
-    })
-    it('should throw with lookup list when file not exist', function () {
-      engine = Liquid({
-        root: ['/boo', '/root/'],
-        extname: '.html'
-      })
-      return expect(engine.renderFile('/not/exist.html')).to
-        .be.rejectedWith(/failed to lookup \/not\/exist.html in: \/boo,\/root\//i)
-    })
-    it('should throw when file not readable', function () {
-      return expect(engine.renderFile('/un-readable.html')).to
-        .be.rejectedWith(/EACCES/)
-    })
-  })
-})

test/mocha.opts

@@ -0,0 +1,2 @@
+--require babel-core/register
+--recursive