Fixed tests and include tag code to use register's file_system

Make it easy to set default resource limits.

.gitignore

@@ -1,41 +1,8 @@
-_site/
-.sass-cache/
-node_modules/
-
-# Compiled source #
-###################
-*.com
-*.class
-*.dll
-*.exe
-*.o
-*.so
-
-# Packages #
-############
-# it's better to unpack these files and commit the raw source
-# git has its own built in compression methods
-*.7z
-*.dmg
-*.gz
-*.iso
-*.jar
-*.rar
-*.tar
-*.zip
-
-# Logs and databases #
-######################
-*.log
-*.sql
-*.sqlite
-
-# OS generated files #
-######################
-.DS_Store
-.DS_Store?
-._*
-.Spotlight-V100
-.Trashes
-ehthumbs.db
-Thumbs.db
+*~
+*.gem
+*.swp
+pkg
+*.rbc
+.rvmrc
+.ruby-version
+Gemfile.lock

.travis.yml

@@ -1,4 +1,16 @@
-install: gem install github-pages
-script: jekyll build --trace
-sudo: false
-rvm: 2.1
+rvm:
+  - 1.9
+  - 2.0
+  - 2.1
+  - jruby-19mode
+  - jruby-head
+  - rbx-2
+matrix:
+  allow_failures:
+    - rvm: rbx-2
+    - rvm: jruby-head
+
+script: "rake test"
+
+notifications:
+  disable: true

CNAME

@@ -1 +0,0 @@
-liquidmarkup.org

CONTRIBUTING.md

@@ -0,0 +1,26 @@
+# How to contribute
+
+## Things we will merge
+
+* Bugfixes
+* Performance improvements
+* Features which are likely to be useful to the majority of Liquid users
+
+## Things we won't merge
+
+* Code which introduces considerable performance degrations
+* Code which touches performance critical parts of Liquid and comes without benchmarks
+* Features which are not important for most people (we want to keep the core Liquid code small and tidy)
+* Features which can easily be implemented on top of Liquid (for example as a custom filter or custom filesystem)
+* Code which comes without tests
+* Code which breaks existing tests
+
+## Workflow
+
+* Fork the Liquid repository
+* Create a new branch in your fork
+* If it makes sense, add tests for your code and run a performance benchmark
+* Make sure all tests pass
+* Create a pull request
+* In the description, ping one of [@boourns](https://github.com/boourns), [@fw42](https://github.com/fw42), [@camilo](https://github.com/camilo), [@dylanahsmith](https://github.com/dylanahsmith), or [@arthurnn](https://github.com/arthurnn) and ask for a code review.
+

Gemfile

@@ -1,3 +1,9 @@
 source 'https://rubygems.org'
 
-gem 'github-pages', group: :jekyll_plugins
+gemspec
+gem 'stackprof', platforms: :mri_21
+
+group :test do
+  gem 'spy', '0.4.1'
+  gem 'benchmark-ips'
+end

Gemfile.lock

@@ -1,133 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    RedCloth (4.2.9)
-    activesupport (4.2.6)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    addressable (2.4.0)
-    coffee-script (2.4.1)
-      coffee-script-source
-      execjs
-    coffee-script-source (1.10.0)
-    colorator (0.1)
-    ethon (0.8.1)
-      ffi (>= 1.3.0)
-    execjs (2.6.0)
-    faraday (0.9.2)
-      multipart-post (>= 1.2, < 3)
-    ffi (1.9.10)
-    gemoji (2.1.0)
-    github-pages (64)
-      RedCloth (= 4.2.9)
-      github-pages-health-check (= 1.1.0)
-      jekyll (= 3.0.3)
-      jekyll-coffeescript (= 1.0.1)
-      jekyll-feed (= 0.4.0)
-      jekyll-gist (= 1.4.0)
-      jekyll-github-metadata (= 1.9.0)
-      jekyll-mentions (= 1.0.1)
-      jekyll-paginate (= 1.1.0)
-      jekyll-redirect-from (= 0.10.0)
-      jekyll-sass-converter (= 1.3.0)
-      jekyll-seo-tag (= 1.3.2)
-      jekyll-sitemap (= 0.10.0)
-      jekyll-textile-converter (= 0.1.0)
-      jemoji (= 0.5.1)
-      kramdown (= 1.10.0)
-      liquid (= 3.0.6)
-      mercenary (~> 0.3)
-      rdiscount (= 2.1.8)
-      redcarpet (= 3.3.3)
-      rouge (= 1.10.1)
-      terminal-table (~> 1.4)
-    github-pages-health-check (1.1.0)
-      addressable (~> 2.3)
-      net-dns (~> 0.8)
-      octokit (~> 4.0)
-      public_suffix (~> 1.4)
-      typhoeus (~> 0.7)
-    html-pipeline (2.3.0)
-      activesupport (>= 2, < 5)
-      nokogiri (>= 1.4)
-    i18n (0.7.0)
-    jekyll (3.0.3)
-      colorator (~> 0.1)
-      jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 1.1)
-      kramdown (~> 1.3)
-      liquid (~> 3.0)
-      mercenary (~> 0.3.3)
-      rouge (~> 1.7)
-      safe_yaml (~> 1.0)
-    jekyll-coffeescript (1.0.1)
-      coffee-script (~> 2.2)
-    jekyll-feed (0.4.0)
-    jekyll-gist (1.4.0)
-      octokit (~> 4.2)
-    jekyll-github-metadata (1.9.0)
-      octokit (~> 4.0)
-    jekyll-mentions (1.0.1)
-      html-pipeline (~> 2.3)
-      jekyll (~> 3.0)
-    jekyll-paginate (1.1.0)
-    jekyll-redirect-from (0.10.0)
-      jekyll (>= 2.0)
-    jekyll-sass-converter (1.3.0)
-      sass (~> 3.2)
-    jekyll-seo-tag (1.3.2)
-      jekyll (~> 3.0)
-    jekyll-sitemap (0.10.0)
-    jekyll-textile-converter (0.1.0)
-      RedCloth (~> 4.0)
-    jekyll-watch (1.3.1)
-      listen (~> 3.0)
-    jemoji (0.5.1)
-      gemoji (~> 2.0)
-      html-pipeline (~> 2.2)
-      jekyll (>= 2.0)
-    json (1.8.3)
-    kramdown (1.10.0)
-    liquid (3.0.6)
-    listen (3.0.6)
-      rb-fsevent (>= 0.9.3)
-      rb-inotify (>= 0.9.7)
-    mercenary (0.3.5)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    multipart-post (2.0.0)
-    net-dns (0.8.0)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
-    octokit (4.3.0)
-      sawyer (~> 0.7.0, >= 0.5.3)
-    public_suffix (1.5.3)
-    rb-fsevent (0.9.7)
-    rb-inotify (0.9.7)
-      ffi (>= 0.5.0)
-    rdiscount (2.1.8)
-    redcarpet (3.3.3)
-    rouge (1.10.1)
-    safe_yaml (1.0.4)
-    sass (3.4.21)
-    sawyer (0.7.0)
-      addressable (>= 2.3.5, < 2.5)
-      faraday (~> 0.8, < 0.10)
-    terminal-table (1.5.2)
-    thread_safe (0.3.5)
-    typhoeus (0.8.0)
-      ethon (>= 0.8.0)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  github-pages
-
-BUNDLED WITH
-   1.11.2

Gruntfile.js

@@ -1,72 +0,0 @@
-// Gruntfile
-module.exports = function(grunt) {
-require('load-grunt-tasks')(grunt);
-
-  // Project configuration.
-  grunt.initConfig({
-
-    pkg: grunt.file.readJSON('package.json'),
-
-    watch: {
-      css: {
-        files: ['_sass/**/*.scss'],
-        tasks: ['sass', 'postcss', 'shell:jekyllBuild'],
-        options: {
-          atBegin: true
-        }
-      },
-      jekyll: {
-        files: ['index.md', '_includes/*.html', 'filters/*.*',  '_layouts/*.*', 'tags/*.*', 'basics/*.*'],
-        tasks: ['shell:jekyllBuild']
-      }
-    },
-
-    sass: {
-      dist: {
-        options: {
-          style: 'expanded',
-          sourcemap: 'none'
-        },
-        files: {
-          '_site/css/main.css':'_sass/main.scss'
-        }
-      }
-    },
-
-    shell: {
-      jekyllServe: {
-        command: 'jekyll serve --no-watch'
-      },
-
-      jekyllBuild: {
-        command: 'jekyll build'
-      }
-    },
-
-    postcss: {
-      options: {
-        map: true,
-        processors: [
-          require('autoprefixer-core')({browsers: 'last 2 versions'})
-        ]
-      },
-      dist: {
-        src: '_site/css/*.css'
-      }
-    },
-
-    concurrent: {
-      tasks: ['shell:jekyllServe', 'watch'],
-      options: {
-        logConcurrentOutput: true
-      }
-    }
-  });
-
-  grunt.loadNpmTasks('grunt-contrib-watch');
-  grunt.loadNpmTasks('grunt-contrib-sass');
-  grunt.loadNpmTasks('grunt-postcss');
-  grunt.loadNpmTasks('grunt-concurrent');
-
-  grunt.registerTask('default', ['concurrent']);
-};

History.md

@@ -0,0 +1,163 @@
+# Liquid Version History
+
+## 3.0.0 / not yet released / branch "master"
+
+* ...
+* Fixed condition with wrong data types, see #423 [Bogdan Gusiev]
+* Add url_encode to standard filters, see #421 [Derrick Reimer, djreimer]
+* Add uniq to standard filters [Florian Weingarten, fw42]
+* Add exception_handler feature, see #397 and #254 [Bogdan Gusiev, bogdan and Florian Weingarten, fw42]
+* Optimize variable parsing to avoid repeated regex evaluation during template rendering #383 [Jason Hiltz-Laforge, jasonhl]
+* Optimize checking for block interrupts to reduce object allocation #380 [Jason Hiltz-Laforge, jasonhl] 
+* Properly set context rethrow_errors on render! #349 [Thierry Joyal, tjoyal]
+* Fix broken rendering of variables which are equal to false, see #345 [Florian Weingarten, fw42]
+* Remove ActionView template handler [Dylan Thacker-Smith, dylanahsmith]
+* Freeze lots of string literals for new Ruby 2.1 optimization, see #297 [Florian Weingarten, fw42]
+* Allow newlines in tags and variables, see #324 [Dylan Thacker-Smith, dylanahsmith]
+* Tag#parse is called after initialize, which now takes options instead of tokens as the 3rd argument. See #321 [Dylan Thacker-Smith, dylanahsmith]
+* Raise `Liquid::ArgumentError` instead of `::ArgumentError` when filter has wrong number of arguments #309 [Bogdan Gusiev, bogdan]
+* Add a to_s default for liquid drops, see #306 [Adam Doeler, releod]
+* Add strip, lstrip, and rstrip to standard filters [Florian Weingarten, fw42]
+* Make if, for & case tags return complete and consistent nodelists, see #250 [Nick Jones, dntj]
+* Prevent arbitrary method invocation on condition objects, see #274 [Dylan Thacker-Smith, dylanahsmith]
+* Don't call to_sym when creating conditions for security reasons, see #273 [Bouke van der Bijl, bouk]
+* Fix resource counting bug with respond_to?(:length), see #263 [Florian Weingarten, fw42]
+* Allow specifying custom patterns for template filenames, see #284 [Andrei Gladkyi, agladkyi]
+* Allow drops to optimize loading a slice of elements, see #282 [Tom Burns, boourns]
+* Support for passing variables to snippets in subdirs, see #271 [Joost Hietbrink, joost]
+* Add a class cache to avoid runtime extend calls, see #249 [James Tucker, raggi]
+* Remove some legacy Ruby 1.8 compatibility code, see #276 [Florian Weingarten, fw42]
+* Add default filter to standard filters, see #267 [Derrick Reimer, djreimer]
+* Add optional strict parsing and warn parsing, see #235 [Tristan Hume, trishume]
+* Add I18n syntax error translation, see #241 [Simon Hørup Eskildsen, Sirupsen]
+* Make sort filter work on enumerable drops, see #239 [Florian Weingarten, fw42]
+* Fix clashing method names in enumerable drops, see #238 [Florian Weingarten, fw42]
+* Make map filter work on enumerable drops, see #233 [Florian Weingarten, fw42]
+* Improved whitespace stripping for blank blocks, related to #216 [Florian Weingarten, fw42]
+
+## 2.6.1 / 2014-01-10 / branch "2-6-stable"
+
+Security fix, cherry-picked from master (4e14a65):
+* Don't call to_sym when creating conditions for security reasons, see #273 [Bouke van der Bijl, bouk]
+* Prevent arbitrary method invocation on condition objects, see #274 [Dylan Thacker-Smith, dylanahsmith]
+
+## 2.6.0 / 2013-11-25
+
+IMPORTANT: Liquid 2.6 is going to be the last version of Liquid which maintains explicit Ruby 1.8 compatability.
+The following releases will only be tested against Ruby 1.9 and Ruby 2.0 and are likely to break on Ruby 1.8.
+
+* Bugfix for #106: fix example servlet [gnowoel]
+* Bugfix for #97: strip_html filter supports multi-line tags [Jo Liss, joliss]
+* Bugfix for #114: strip_html filter supports style tags [James Allardice, jamesallardice]
+* Bugfix for #117: 'now' support for date filter in Ruby 1.9 [Notre Dame Webgroup, ndwebgroup]
+* Bugfix for #166: truncate filter on UTF-8 strings with Ruby 1.8 [Florian Weingarten, fw42]
+* Bugfix for #204: 'raw' parsing bug [Florian Weingarten, fw42]
+* Bugfix for #150: 'for' parsing bug [Peter Schröder, phoet]
+* Bugfix for #126: Strip CRLF in strip_newline [Peter Schröder, phoet]
+* Bugfix for #174, "can't convert Fixnum into String" for "replace" [wǒ_is神仙, jsw0528]
+* Allow a Liquid::Drop to be passed into Template#render [Daniel Huckstep, darkhelmet]
+* Resource limits [Florian Weingarten, fw42]
+* Add reverse filter [Jay Strybis, unreal]
+* Add utf-8 support
+* Use array instead of Hash to keep the registered filters [Tasos Stathopoulos, astathopoulos]
+* Cache tokenized partial templates [Tom Burns, boourns]
+* Avoid warnings in Ruby 1.9.3 [Marcus Stollsteimer, stomar]
+* Better documentation for 'include' tag (closes #163) [Peter Schröder, phoet]
+* Use of BigDecimal on filters to have better precision (closes #155) [Arthur Nogueira Neves, arthurnn]
+
+## 2.5.5 / 2014-01-10 / branch "2-5-stable"
+
+Security fix, cherry-picked from master (4e14a65):
+* Don't call to_sym when creating conditions for security reasons, see #273 [Bouke van der Bijl, bouk]
+* Prevent arbitrary method invocation on condition objects, see #274 [Dylan Thacker-Smith, dylanahsmith]
+
+## 2.5.4 / 2013-11-11
+
+* Fix "can't convert Fixnum into String" for "replace", see #173, [wǒ_is神仙, jsw0528]
+
+## 2.5.3 / 2013-10-09
+
+* #232, #234, #237: Fix map filter bugs [Florian Weingarten, fw42]
+
+## 2.5.2 / 2013-09-03 / deleted
+
+Yanked from rubygems, as it contained too many changes that broke compatibility. Those changes will be on following major releases.
+
+## 2.5.1 / 2013-07-24
+
+* #230: Fix security issue with map filter, Use invoke_drop in map filter [Florian Weingarten, fw42]
+
+## 2.5.0 / 2013-03-06
+
+* Prevent Object methods from being called on drops
+* Avoid symbol injection from liquid
+* Added break and continue statements
+* Fix filter parser for args without space separators
+* Add support for filter keyword arguments
+
+
+## 2.4.0 / 2012-08-03
+
+* Performance improvements
+* Allow filters in `assign`
+* Add `modulo` filter
+* Ruby 1.8, 1.9, and Rubinius compatibility fixes
+* Add support for `quoted['references']` in `tablerow`
+* Add support for Enumerable to `tablerow`
+* `strip_html` filter removes html comments
+
+
+## 2.3.0 / 2011-10-16
+
+* Several speed/memory improvements
+* Numerous bug fixes
+* Added support for MRI 1.9, Rubinius, and JRuby
+* Added support for integer drop parameters
+* Added epoch support to `date` filter
+* New `raw` tag that suppresses parsing
+* Added `else` option to `for` tag
+* New `increment` tag
+* New `split` filter
+
+
+## 2.2.1 / 2010-08-23
+
+* Added support for literal tags
+
+
+## 2.2.0 / 2010-08-22
+
+* Compatible with Ruby 1.8.7, 1.9.1 and 1.9.2-p0
+* Merged some changed made by the community
+
+
+## 1.9.0 / 2008-03-04
+
+* Fixed gem install rake task
+* Improve Error encapsulation in liquid by maintaining a own set of exceptions instead of relying on ruby build ins
+
+
+## Before 1.9.0
+
+* Added If with or / and expressions
+* Implemented .to_liquid for all objects which can be passed to liquid like Strings Arrays Hashes Numerics and Booleans. To export new objects to liquid just implement .to_liquid on them and return objects which themselves have .to_liquid methods.
+* Added more tags to standard library
+* Added include tag ( like partials in rails )
+* [...] Gazillion of detail improvements
+* Added strainers as filter hosts for better security [Tobias Luetke]
+* Fixed that rails integration would call filter with the wrong "self" [Michael Geary]
+* Fixed bad error reporting when a filter called a method which doesn't exist. Liquid told you that it couldn't find the filter which was obviously misleading [Tobias Luetke]
+* Removed count helper from standard lib. use size [Tobias Luetke]
+* Fixed bug with string filter parameters failing to tolerate commas in strings. [Paul Hammond]
+* Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ArgumentSeparator: , by default [Paul Hammond]
+    {{ 'Typo' | link_to: 'http://typo.leetsoft.com', 'Typo - a modern weblog engine' }}
+* Added Liquid::Drop. A base class which you can use for exporting proxy objects to liquid which can acquire more data when used in liquid. [Tobias Luetke]
+
+  class ProductDrop < Liquid::Drop
+    def top_sales
+       Shop.current.products.find(:all, :order => 'sales', :limit => 10 )
+    end
+  end
+  t = Liquid::Template.parse( ' {% for product in product.top_sales %} {{ product.name }} {% endfor %} '  )
+  t.render('product' => ProductDrop.new )
+* Added filter parameters support. Example: {{ date | format_date: "%Y" }} [Paul Hammond]

MIT-LICENSE

@@ -0,0 +1,20 @@
+Copyright (c) 2005, 2006 Tobias Luetke
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

@@ -1,9 +1,75 @@
-# New Liquid Docs
+[![Build Status](https://secure.travis-ci.org/Shopify/liquid.png?branch=master)](http://travis-ci.org/Shopify/liquid)
+[![Inline docs](http://inch-ci.org/github/Shopify/liquid.png)](http://inch-ci.org/github/Shopify/liquid)
 
-To run, follow these steps:
+# Liquid template engine
 
-1. Download ZIP or clone in GitHub
-2. Navigate to `liquid` folder
-3. Run `jekyll watch`
-4. Open `http://127.0.0.1:4000` in your browser
+* [Contributing guidelines](CONTRIBUTING.md)
+* [Version history](History.md)
+* [Liquid documentation from Shopify](http://docs.shopify.com/themes/liquid-basics)
+* [Liquid Wiki at GitHub](https://github.com/Shopify/liquid/wiki)
+* [Website](http://liquidmarkup.org/)
 
+## Introduction
+
+Liquid is a template engine which was written with very specific requirements:
+
+* It has to have beautiful and simple markup. Template engines which don't produce good looking markup are no fun to use.
+* It needs to be non evaling and secure. Liquid templates are made so that users can edit them. You don't want to run code on your server which your users wrote.
+* It has to be stateless. Compile and render steps have to be separate so that the expensive parsing and compiling can be done once and later on you can just render it passing in a hash with local variables and objects.
+
+## Why you should use Liquid
+
+* You want to allow your users to edit the appearance of your application but don't want them to run **insecure code on your server**.
+* You want to render templates directly from the database.
+* You like smarty (PHP) style template engines.
+* You need a template engine which does HTML just as well as emails.
+* You don't like the markup of your current templating engine.
+
+## What does it look like?
+
+```html
+<ul id="products">
+  {% for product in products %}
+    <li>
+      <h2>{{ product.name }}</h2>
+      Only {{ product.price | price }}
+
+      {{ product.description | prettyprint | paragraph }}
+    </li>
+  {% endfor %}
+</ul>
+```
+
+## How to use Liquid
+
+Liquid supports a very simple API based around the Liquid::Template class.
+For standard use you can just pass it the content of a file and call render with a parameters hash.
+
+```ruby
+@template = Liquid::Template.parse("hi {{name}}") # Parses and compiles the template
+@template.render('name' => 'tobi')                # => "hi tobi"
+```
+
+### Error Modes
+
+Setting the error mode of Liquid lets you specify how strictly you want your templates to be interpreted.
+Normally the parser is very lax and will accept almost anything without error. Unfortunately this can make
+it very hard to debug and can lead to unexpected behaviour. 
+
+Liquid also comes with a stricter parser that can be used when editing templates to give better error messages
+when templates are invalid. You can enable this new parser like this:
+
+```ruby
+Liquid::Template.error_mode = :strict # Raises a SyntaxError when invalid syntax is used
+Liquid::Template.error_mode = :warn # Adds errors to template.errors but continues as normal
+Liquid::Template.error_mode = :lax # The default mode, accepts almost anything.
+```
+
+If you want to set the error mode only on specific templates you can pass `:error_mode` as an option to `parse`:
+```ruby
+Liquid::Template.parse(source, :error_mode => :strict)
+```
+This is useful for doing things like enabling strict mode only in the theme editor.
+
+It is recommended that you enable `:strict` or `:warn` mode on new apps to stop invalid templates from being created.
+It is also recommended that you use it in the template editors of existing apps to give editors better error messages.

Rakefile

@@ -0,0 +1,77 @@
+require 'rake'
+require 'rake/testtask'
+$LOAD_PATH.unshift File.expand_path("../lib", __FILE__)
+require "liquid/version"
+
+task :default => 'test'
+
+desc 'run test suite with default parser'
+Rake::TestTask.new(:base_test) do |t|
+  t.libs << '.' << 'lib' << 'test'
+  t.test_files = FileList['test/{integration,unit}/**/*_test.rb']
+  t.verbose = false
+end
+
+desc 'run test suite with warn error mode'
+task :warn_test do
+  ENV['LIQUID_PARSER_MODE'] = 'warn'
+  Rake::Task['base_test'].invoke
+end
+
+desc 'runs test suite with both strict and lax parsers'
+task :test do
+  ENV['LIQUID_PARSER_MODE'] = 'lax'
+  Rake::Task['base_test'].invoke
+  ENV['LIQUID_PARSER_MODE'] = 'strict'
+  Rake::Task['base_test'].reenable
+  Rake::Task['base_test'].invoke
+end
+
+task :gem => :build
+task :build do
+  system "gem build liquid.gemspec"
+end
+
+task :install => :build do
+  system "gem install liquid-#{Liquid::VERSION}.gem"
+end
+
+task :release => :build do
+  system "git tag -a v#{Liquid::VERSION} -m 'Tagging #{Liquid::VERSION}'"
+  system "git push --tags"
+  system "gem push liquid-#{Liquid::VERSION}.gem"
+  system "rm liquid-#{Liquid::VERSION}.gem"
+end
+
+namespace :benchmark do
+
+  desc "Run the liquid benchmark with lax parsing"
+  task :run do
+    ruby "./performance/benchmark.rb lax"
+  end
+
+  desc "Run the liquid benchmark with strict parsing"
+  task :strict do
+    ruby "./performance/benchmark.rb strict"
+  end
+end
+
+
+namespace :profile do
+
+  desc "Run the liquid profile/performance coverage"
+  task :run do
+    ruby "./performance/profile.rb"
+  end
+
+  desc "Run the liquid profile/performance coverage with strict parsing"
+  task :strict do
+    ruby "./performance/profile.rb strict"
+  end
+
+end
+
+desc "Run example"
+task :example do
+  ruby "-w -d -Ilib example/server/server.rb"
+end

_config.yml

@@ -1,25 +0,0 @@
-title: Liquid Templating Engine
-description: "Liquid is a template language and accompanying rendering engine. It is built for security, so is perfect for rendering custom templates from your users."
-
-repository: https://github.com/Shopify/liquid
-
-# Build settings
-baseurl:                "" # the subpath of your site, e.g. /blog/
-url:                    http://liquidmarkup.org # the base hostname & protocol for your site
-markdown:               redcarpet
-redcarpet:
-  extensions:           ["with_toc_data", "tables", "disable_indented_code_blocks", "no_intra_emphasis"]
-highlighter:            pygments
-permalink:              pretty
-exclude:
-  - README.md
-  - CNAME
-  - node_modules
-keep_files:             ["css"]
-
-# Front matter defaults
-defaults:
-  - scope:
-      path: "" # an empty string here means all files in the project
-    values:
-      layout: default

_includes/home-banner.html

@@ -1,8 +0,0 @@
-<header class="home-banner">
-  <h1>Liquid</h1>
-  <p>Safe, customer facing template language for flexible web apps.</p>
-  <p class="btn-row">
-    <a href="https://github.com/Shopify/liquid/archive/master.zip" target="_blank" class="btn"><i class="icon fa fa-2x fa-arrow-circle-down"></i>Download</a>
-    <a href="https://github.com/Shopify/liquid" target="_blank" class="btn"><i class="icon fa fa-2x fa-github"></i>View on Github</a>
-  </p>
-</header>

_includes/home-users-grid.html

@@ -1,24 +0,0 @@
-<div class="home-users-grid">
-  <div class="home-users-grid__item">
-    <a href="http://jekyllrb.com/" target="_blank">
-      <img src="/images/jekyll-logo.png" />
-    </a>
-  </div>
-  <div class="home-users-grid__item">
-    <a href="http://www.desk.com/" target="_blank">
-      <img src="/images/salesforcedesk-logo.png" />
-    </a>
-  </div>
-  <div class="home-users-grid__item">
-    <a href="https://www.zendesk.com/ " target="_blank">
-      <img src="/images/zendesk-logo.png" />
-    </a>
-  </div>
-  <div class="home-users-grid__item">
-    <a href="http://500px.com/" target="_blank">
-      <img src="/images/500px-logo.png" />
-    </a>
-  </div>
-</div>
-
-<p class="home-users-blurb">...and <a href="https://github.com/Shopify/liquid/wiki#who-uses-liquid" target="_blank">many more!</a></p>

_includes/sidebar.html

@@ -1,18 +0,0 @@
-<div class="sidebar">
-  <div class="sidebar--logo">
-    <a href="/">Liquid</a>
-  </div>
-  <nav class="sidebar--nav"> {% assign sections = "basics, tags, filters" | split: ", " %}
-
-    {% for section in sections %}
-    <h3 class="section__header">{{ section | capitalize }}</h3>
-
-    <ul class="section__links">
-    {% for item in site.pages %}{% if item.url contains section/ %}{% unless item.path contains "index" %}
-      <li><a href="{{ item.url | prepend: site.baseurl }}" class="section__link{% if item.url contains page.url and page.url != "/" %} section__link--is-active {% endif %}">{{ item.title }}</a></li>
-    {% endunless %}{% endif %}{% endfor %}
-    </ul>
-    {% endfor %}
-
-  </nav>
-</div>

_layouts/default.html

@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>{% if page.title %}{{ page.title }} – {% endif %}{{ site.title }}</title>
-
-    <meta charset="utf-8">
-    <meta http-equiv="X-UA-Compatible" content="IE=edge">
-    <meta name="viewport" content="width=device-width, initial-scale=1">
-    <meta name="description" content="{% if page.excerpt %}{{ page.excerpt | strip_html | strip_newlines | truncate: 160 }}{% else %}{{ site.description }}{% endif %}">
-
-    <link rel="stylesheet" href="{{ '/css/main.css' | prepend: site.baseurl }}">
-    <link href='http://fonts.googleapis.com/css?family=Droid+Sans:400,700' rel='stylesheet' type='text/css'>
-    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">
-    <link rel="canonical" href="{{ page.url | replace:'index.html','' | prepend: site.baseurl | prepend: site.url }}">
-    <link rel="alternate" type="application/rss+xml" title="{{ site.title }}" href="{{ "/feed.xml" | prepend: site.baseurl | prepend: site.url }}" />
-  </head>
-
-  <body>
-    {% include sidebar.html %}
-
-    <div class="content__area">
-      <div class="content">
-        <h1>{{ page.title }}</h1>
-        {{ content }}
-      </div>
-    </div>
-
-  </body>
-</html>

_sass/main.scss

@@ -1,17 +0,0 @@
-
-@charset "utf-8";
-
-@import "partials/defaults";
-@import "partials/colors";
-@import "partials/helpers";
-
-@import "modules/base";
-@import "modules/layout";
-@import "modules/buttons";
-@import "modules/home-banner";
-@import "modules/home-users-grid";
-@import "modules/content-area";
-
-@import "vendors/syntax-highlighting";
-
-

_sass/modules/_base.scss

@@ -1,185 +0,0 @@
-* {
-  box-sizing: border-box;
-}
-
-/**
- * Reset some basic elements
- */
-body, h1, h2, h3, h4, h5, h6,
-p, blockquote, pre, hr,
-dl, dd, ol, ul, figure {
-    margin: 0;
-    padding: 0;
-}
-
-/**
- * Basic styling
- */
-body {
-  font-family: $base-font-family;
-  font-size: $base-font-size;
-  line-height: $base-line-height;
-  font-weight: 300;
-  color: $color-slate;
-  -webkit-text-size-adjust: 100%;
-}
-
-/** Set `margin-bottom` to maintain vertical rhythm */
-
-h1, h2, h3, h4, h5, h6,
-p, blockquote, pre,
-ul, ol, dl, figure,
-%vertical-rhythm {
-  margin-bottom: $spacing-unit / 2;
-}
-
-/** Images */
-
-img {
-  max-width: 100%;
-  vertical-align: middle;
-}
-
-/** Figures */
-
-figure > img {
-  display: block;
-}
-
-figcaption {
-  font-size: $small-font-size;
-}
-
-/** Lists */
-ul, ol {
-  margin-left: $spacing-unit;
-}
-
-li {
-  > ul, > ol {
-    margin-bottom: 0;
-  }
-}
-
-/** Headings */
-
-h1, h2, h3, h4, h5, h6 {
-  font-weight: bold;
-}
-
-/** Links */
-a {
-    color: $color-blue-5;
-
-    &:visited {
-      color: #609;
-    }
-
-    &:hover {
-        text-decoration: underline;
-    }
-}
-
-h1 {
-  font-size: 2em;
-}
-
-h2 {
-  font-size: 1.5em;
-  text-decoration: underline;
-  margin-top: $spacing-unit;
-}
-
-h3 {
-  font-size: 1em;
-  text-decoration: underline;
-}
-
-h4 {
-  font-size: 1em;
-}
-
-blockquote {
-  color: lighten($color-slate, 30%);
-  border-left: 2px solid lighten($color-slate, 50%);
-  padding-left: $spacing-unit / 2;
-  letter-spacing: -1px;
-  font-style: italic;
-
-  > :last-child {
-    margin-bottom: 0;
-  }
-}
-
-pre, code {
-  font-size: 15px;
-  border-radius: 3px;
-  background-color: lighten($color-blue-1, 0.9);
-}
-
-code {
-  padding: 1px 5px;
-}
-
-pre {
-  padding: 8px 12px;
-  border: 1px solid $color-blue-2;
-  word-wrap: break-word;
-
-  > code {
-    border: 0;
-    padding-right: 0;
-    padding-left: 0;
-  }
-}
-
-hr {
-  display: block;
-  height: 1px;
-  border: 0;
-  background-color: lighten($color-slate, 50%);
-  margin-bottom: $spacing-unit/2;
-}
-
-table {
-  width: 100%;
-  overflow: auto;
-  display: block;
-  margin: 15px 0;
-  border-collapse: collapse;
-  thead {
-    margin: 0;
-    padding: 0;
-    border: 0;
-    font-size: 100%;
-    font: inherit;
-    vertical-align: baseline;
-  }
-  th {
-    border: 1px solid #ddd;
-    padding: 6px 13px;
-    font-weight: bold;
-    text-align: center;
-  }
-  tbody {
-    vertical-align: middle;
-    border-color: inherit;
-  }
-  tr {
-    border-top: 1px solid #ccc;
-    background-color: #fff;
-    vertical-align: inherit;
-  }
-  td {
-    border: 1px solid #ddd;
-    padding: 6px 13px;
-  }
-  /* Don't use a margin on code samples within tables */
-  pre {
-    margin-bottom: 0;
-  }
-}
-
-p {
-  line-height: 1.8;
-}

_sass/modules/_buttons.scss

@@ -1,34 +0,0 @@
-.btn {
-  color: $color-white;
-  display: flex;
-  background: $color-blue-5;
-  align-items: center;
-  padding: $spacing-unit/4 $spacing-unit/2;
-  border-radius: 8px;
-  text-decoration: none;
-
-  &:hover {
-    background: $color-blue-4;
-    cursor: pointer;
-    text-decoration: none;
-  }
-}
-
-.btn:visited {
-  color: $color-white;
-}
-
-.btn-row {
-  display: flex;
-  justify-content: center;
-  margin-bottom: 0;
-
-  .btn:not(:first-child) {
-    margin-left: $spacing-unit / 2;
-  }
-}
-
-.icon {
-  vertical-align: middle;
-  margin-right: $spacing-unit / 4;
-}

_sass/modules/_content-area.scss

@@ -1,31 +0,0 @@
-.content__item {
-  margin-bottom: $spacing-unit * 2;
-}
-
-.highlight {
-
-  pre {
-    border-top: none;
-    border-radius: 0 0 3px 3px;
-  }
-
-  &:before {
-    content: "Example";
-    display: block;
-    padding: 8px 12px;
-    color: $color-slate;
-    background: #fff;
-    border: 1px solid $color-blue-2;
-    border-radius: 3px 3px 0 0;
-    font-size: 16px;
-    font-weight: bold;
-  }
-
-  // Label every second code block with "Output"
-  & + .highlight:nth-of-type(2n) {
-    &:before {
-      content: "Output";
-    }
-  }
-
-}

_sass/modules/_home-banner.scss

@@ -1,11 +0,0 @@
-.home-banner {
-  text-align: center;
-  border-bottom: 1px solid lighten($color-slate, 50%);
-  padding-bottom: $spacing-unit;
-  margin-bottom: $spacing-unit;
-
-  h1 {
-    font-weight: bold;
-    font-size: 5em;
-  }
-}

_sass/modules/_home-users-grid.scss

@@ -1,20 +0,0 @@
-.home-users-grid {
-  display: flex;
-  align-items: center;
-  flex-wrap: wrap;
-  margin-bottom: $spacing-unit / 2;
-}
-
-.home-users-grid__item{
-  flex: 1;
-  margin-right: $spacing-unit / 2;
-  max-width: 50%;
-
-  &:last-child {
-    margin-right: 0;
-  }
-}
-
-.home-users-blurb {
-  text-align: right;
-}

_sass/modules/_layout.scss

@@ -1,112 +0,0 @@
-
-$sidebar-width: 250px;
-$logo-height: 130px;
-$wrapper-width: 800px;
-
-/*============================================================================
-  Content Area
- ==============================================================================*/
-
-.content__area {
-  padding: $spacing-unit $spacing-unit $spacing-unit ($spacing-unit + $sidebar-width);
-  width: 100%;
-}
-
-.content {
-  max-width: $wrapper-width;
-  margin: 0 auto;
-  padding: 0 $spacing-unit;
-  @extend %clearfix;
-}
-
-/*============================================================================
-  Sidebar
- ==============================================================================*/
-
-.sidebar {
-  background: $color-blue-5;
-  width: $sidebar-width;
-  height: 100vh;
-  position: fixed;
-}
-
-.sidebar--logo {
-  font-size: $base-font-size * 2;
-  font-weight: bold;
-  text-align: center;
-  height: $logo-height;
-  line-height: $logo-height;
-  margin-bottom: 0;
-  border-bottom: 1px solid $color-blue-4;
-
-  a {
-    color: $color-white;
-    text-decoration: none;
-
-    &:hover {
-      text-decoration: underline;
-    }
-  }
-}
-
-.sidebar--nav {
-  padding: $spacing-unit $spacing-unit ($spacing-unit + $logo-height); // Add a bit more padding at the bottom for consistency.
-  font-weight: bold;
-  max-height: 100%;
-  overflow-y: scroll;
-
-  li {
-    list-style: none;
-
-    a {
-      color: $color-white;
-
-      &:hover {
-        text-decoration: none;
-      }
-    }
-  }
-}
-
-.section {
-  margin: 0px;
-
-  > li {
-    margin-bottom: $spacing-unit / 2;
-
-    &:last-child {
-      margin-bottom: $spacing-unit;
-    }
-  }
-}
-
-.section__header {
-  font-weight: bold;
-  font-size: 1em;
-  text-decoration: none;
-  color: $color-white;
-  margin-bottom: $spacing-unit / 4;
-}
-
-.section__links {
-  margin-left: $spacing-unit / 2;
-  margin-bottom: $spacing-unit;
-  font-weight: normal;
-  font-size: 0.9em;
-}
-
-.section__link {
-  display: inline-block;
-  margin-top: $spacing-unit/4;
-  opacity: 0.75;
-  text-decoration: none;
-
-  &:hover {
-    opacity: 1;
-  }
-}
-
-.section__link--is-active {
-  font-weight: bold;
-  opacity: 1;
-}

_sass/partials/_colors.scss

@@ -1,10 +0,0 @@
-// I got the blues, man.
-// 1 --> 5, lightest --> darkest.
-
-$color-blue-1: #E8F8FF;
-$color-blue-2: #B4DCED;
-$color-blue-3: #91C9E8;
-$color-blue-4: #67B8DE;
-$color-blue-5: #3399CC;
-$color-white: #ffffff;
-$color-slate: #5E5E5E;

_sass/partials/_defaults.scss

@@ -1,6 +0,0 @@
-$base-font-family: 'Droid Sans', sans-serif;
-$base-font-size:   18px;
-$small-font-size:  $base-font-size * 0.875;
-$base-line-height: 1.5;
-$spacing-unit:     40px;
-

_sass/partials/_helpers.scss

@@ -1,7 +0,0 @@
-%clearfix {
-  &:after {
-    content: "";
-    display: table;
-    clear: both;
-   }
-}

_sass/vendors/_syntax-highlighting.scss

@@ -1,67 +0,0 @@
-/**
- * Syntax highlighting styles
- */
-.highlight {
-    background: #fff;
-    @extend %vertical-rhythm;
-
-    .c     { color: #998; font-style: italic } // Comment
-    .err   { color: #a61717; background-color: #e3d2d2 } // Error
-    .k     { font-weight: bold } // Keyword
-    .o     { font-weight: bold } // Operator
-    .cm    { color: #998; font-style: italic } // Comment.Multiline
-    .cp    { color: #999; font-weight: bold } // Comment.Preproc
-    .c1    { color: #998; font-style: italic } // Comment.Single
-    .cs    { color: #999; font-weight: bold; font-style: italic } // Comment.Special
-    .gd    { color: #000; background-color: #fdd } // Generic.Deleted
-    .gd .x { color: #000; background-color: #faa } // Generic.Deleted.Specific
-    .ge    { font-style: italic } // Generic.Emph
-    .gr    { color: #a00 } // Generic.Error
-    .gh    { color: #999 } // Generic.Heading
-    .gi    { color: #000; background-color: #dfd } // Generic.Inserted
-    .gi .x { color: #000; background-color: #afa } // Generic.Inserted.Specific
-    .go    { color: #888 } // Generic.Output
-    .gp    { color: #555 } // Generic.Prompt
-    .gs    { font-weight: bold } // Generic.Strong
-    .gu    { color: #aaa } // Generic.Subheading
-    .gt    { color: #a00 } // Generic.Traceback
-    .kc    { font-weight: bold } // Keyword.Constant
-    .kd    { font-weight: bold } // Keyword.Declaration
-    .kp    { font-weight: bold } // Keyword.Pseudo
-    .kr    { font-weight: bold } // Keyword.Reserved
-    .kt    { color: #458; font-weight: bold } // Keyword.Type
-    .m     { color: #099 } // Literal.Number
-    .s     { color: #d14 } // Literal.String
-    .na    { color: #008080 } // Name.Attribute
-    .nb    { color: #0086B3 } // Name.Builtin
-    .nc    { color: #458; font-weight: bold } // Name.Class
-    .no    { color: #008080 } // Name.Constant
-    .ni    { color: #800080 } // Name.Entity
-    .ne    { color: #900; font-weight: bold } // Name.Exception
-    .nf    { color: #900; font-weight: bold } // Name.Function
-    .nn    { color: #555 } // Name.Namespace
-    .nt    { color: #000080 } // Name.Tag
-    .nv    { color: #008080 } // Name.Variable
-    .ow    { font-weight: bold } // Operator.Word
-    .w     { color: #bbb } // Text.Whitespace
-    .mf    { color: #099 } // Literal.Number.Float
-    .mh    { color: #099 } // Literal.Number.Hex
-    .mi    { color: #099 } // Literal.Number.Integer
-    .mo    { color: #099 } // Literal.Number.Oct
-    .sb    { color: #d14 } // Literal.String.Backtick
-    .sc    { color: #d14 } // Literal.String.Char
-    .sd    { color: #d14 } // Literal.String.Doc
-    .s2    { color: #d14 } // Literal.String.Double
-    .se    { color: #d14 } // Literal.String.Escape
-    .sh    { color: #d14 } // Literal.String.Heredoc
-    .si    { color: #d14 } // Literal.String.Interpol
-    .sx    { color: #d14 } // Literal.String.Other
-    .sr    { color: #009926 } // Literal.String.Regex
-    .s1    { color: #d14 } // Literal.String.Single
-    .ss    { color: #990073 } // Literal.String.Symbol
-    .bp    { color: #999 } // Name.Builtin.Pseudo
-    .vc    { color: #008080 } // Name.Variable.Class
-    .vg    { color: #008080 } // Name.Variable.Global
-    .vi    { color: #008080 } // Name.Variable.Instance
-    .il    { color: #099 } // Literal.Number.Integer.Long
-}

basics/_handles.md

@@ -1,48 +0,0 @@
----
-title: Handles
----
-
-A handle is used to access the attributes of a Liquid object. By default, the handle is the object's title in lowercase with any spaces and special characters replaced by hyphens (-).
-
-For example, a page with the title "About Us" can be accessed in Liquid via its handle `about-us` as shown below:
-
-{% highlight liquid %}
-{% raw %}
-<!-- the content of the About Us page -->
-{{ pages.about-us.content }}
-{% endraw %}
-{% endhighlight %}
-
-## Creating handles
-
-An object with the title "Shirt" will automatically be given the handle `shirt`. If there is already an object with the handle `shirt`, the handle will auto-increment. In other words, "Shirt" objects created after the first one will receive the handle `shirt-1`, `shirt-2`, and so on.
-
-Whitespace in titles is replaced by hyphens in handles. For example, the title "My Shiny New Title" will be given the handle `my-shiny-new-title`.
-
-Handles also determine the URL of their corresponding objects. For example, a page with the handle `about-us` would have the url `/pages/about-us`.
-
-Websites often rely on static handles for pages, posts, or objects. To preserve design elements and avoid broken links, if you modify the title of an object, **its handle is not automatically updated**. For example, if you were to change a page title from "About Us" to "About This Website", its handle would still be `about-us`.
-
-You can change an object's handle manually (TK how to change a handle manually)
-
-## Accessing handle attributes
-
-In many cases you may know the handle of a object whose attributes you want to access. You can access its attributes by pluralizing the name of the object, then using either the square bracket ( [ ] ) or dot ( . ) notation.
-
-<div class="code-block code-block--input">
-{% highlight liquid %}
-{% raw %}
-{{ pages.about-us.title }}
-{{ pages["about-us"].title }}
-{% endraw %}
-{% endhighlight %}
-</div>
-
-<div class="code-block code-block--output">
-{% highlight text %}
-About Us
-About Us
-{% endhighlight %}
-</div>
-
-In the example above, notice that we are using `pages` as opposed to `page`.

basics/index.html

@@ -1,4 +0,0 @@
----
-layout: default
----
-

basics/introduction.md

@@ -1,64 +0,0 @@
----
-title: Introduction
----
-
-Liquid code can be categorized into [**objects**](#objects), [**tags**](#tags), and [**filters**](#filters).
-
-## Objects
-
-**Objects** tell Liquid where to show content on a page. Objects and variable names are denoted by double curly braces: `{% raw %}{{{% endraw %}` and `{% raw %}}}{% endraw %}`.
-
-
-```liquid
-{% raw %}
-{{ page.title }}
-{% endraw %}
-```
-
-```text
-Introduction
-```
-
-In this case, Liquid is rendering the content of an object called `page.title`, and that object contains the text `Introduction`.
-
-## Tags
-
-**Tags** create the logic and control flow for templates. They are denoted by curly braces and percent signs: `{% raw %}{%{% endraw %}` and `{% raw %}%}{% endraw %}`.
-
-The markup used in tags does not produce any visible text. This means that you can assign variables and create conditions and loops without showing any of the Liquid logic on the page.
-
-```liquid
-{% raw %}
-{% if user %}
-  Hello {{ user.name }}!
-{% endif %}
-
-{% endraw %}
-```
-
-```text
-Hello Adam!
-```
-
-Tags can be categorized into three types:
-
-- [Control flow](/tags/control-flow)
-- [Iteration](/tags/iteration)
-- [Variable assignments](/tags/variable)
-
-You can read more about each type of tag in their respective sections.
-
-
-## Filters
-
-**Filters** change the output of a Liquid object. They are using within an output and are separated by a `|`.
-
-```liquid
-{% raw %}
-{{ "/my/fancy/url" | append: ".html" }}
-{% endraw %}
-```
-
-```text
-{{ "/my/fancy/url" | append: ".html" }}
-```

basics/operators.md

@@ -1,88 +0,0 @@
----
-title: Operators
----
-
-Liquid includes many logical and comparison operators.
-
-## Basic operators
-
-<table>
-  <tbody>
-    <tr>
-      <td><code>==</code></td>
-      <td>equals</td>
-    </tr>
-    <tr>
-      <td><code>!=</code></td>
-      <td>does not equal</td>
-    </tr>
-    <tr>
-      <td><code>&gt;</code></td>
-      <td>greater than</td>
-    </tr>
-    <tr>
-      <td><code>&lt;</code></td>
-      <td>less than</td>
-    </tr>
-    <tr>
-      <td><code>&gt;=</code></td>
-      <td>greater than or equal to</td>
-    </tr>
-    <tr>
-      <td><code>&lt;=</code></td>
-      <td>less than or equal to</td>
-    </tr>
-    <tr>
-      <td><code>or</code></td>
-      <td>logical or</td>
-    </tr>
-    <tr>
-      <td><code>and</code></td>
-      <td>logical and</td>
-    </tr>
-  </tbody>
-</table>
-
-For example:
-
-```liquid
-{% raw %}
-{% if product.title == "Awesome Shoes" %}
-  These shoes are awesome!
-{% endif %}
-{% endraw %}
-```
-
-You can use multiple operators in a tag:
-
-```liquid
-{% raw %}
-{% if product.type == "Shirt" or product.type == "Shoes" %}
-  This is a shirt or a pair of shoes.
-{% endif %}
-{% endraw %}
-```
-
-## contains
-
-`contains` checks for the presence of a substring inside a string.
-
-```liquid
-{% raw %}
-{% if product.title contains 'Pack' %}
-  This product's title contains the word Pack.
-{% endif %}
-{% endraw %}
-```
-
-`contains` can also check for the presence of a string in an array of strings.
-
-```liquid
-{% raw %}
-{% if product.tags contains 'Hello' %}
-  This product has been tagged with 'Hello'.
-{% endif %}
-{% endraw %}
-```
-
-`contains` can only search strings. You cannot use it to check for an object in an array of objects.

basics/truthy-and-falsy.md

@@ -1,76 +0,0 @@
----
-title: Truthy and falsy
----
-
-In programming, anything that returns `true` in a conditional is called **truthy**. Anything that returns `false` in a conditional is called **falsy**. All object types can be described as either truthy or falsy.
-
-- [Truthy](#truthy)
-- [Falsy](#falsy)
-- [Summary](#summary)
-
-## Truthy
-
-All values in Liquid are truthy except `nil` and `false`.
-
-In the example below, the string "Tobi" is not a boolean, but it is truthy in a conditional:
-
-```liquid
-{% raw %}
-{% assign tobi = "Tobi" %}
-
-{% if tobi == true %}
-  This condition will always be true.
-{% endif %}
-{% endraw %}
-```
-
-[Strings](/basics/types/#string), even when empty, are truthy. The example below will result in empty HTML tags if `settings.fp_heading` is empty:
-
-```liquid
-{% raw %}
-{% if settings.fp_heading %}
-  <h1>{{ settings.fp_heading }}</h1>
-{% endif %}
-{% endraw %}
-```
-
-```html
-<h1></h1>
-```
-
-[EmptyDrops](/basics/types/#emptydrop) are also truthy. In the example below, if `settings.page` is an empty string or set to a hidden or deleted object, you will end up with an EmptyDrop. The result is an empty `div`:
-
-```liquid
-{% raw %}
-{% if pages[settings.page] %}
-  <div>{{ pages[settings.page].content }}</div>
-{% endif %}
-{% endraw %}
-```
-
-```html
-<div></div>
-```
-
-## Falsy
-
-The falsy values in Liquid are [`nil`](/basics/types/#nil) and [`false`](/basics/types/#boolean).
-
-## Summary
-
-The table below summarizes what is truthy or falsy in Liquid.
-
-|               | truthy        | falsy         |
-| ------------- |:-------------:|:-------------:|
-| true          | •             |               |
-| false         |               | •             |
-| nil           |               | •             |
-| string        | •             |               |
-| empty string  | •             |               |
-| 0             | •             |               |
-| integer       | •             |               |
-| float         | •             |               |
-| array         | •             |               |
-| empty array   | •             |               |
-| page          | •             |               |
-| EmptyDrop     | •             |               |

basics/types.md

@@ -1,160 +0,0 @@
----
-title: Types
----
-
-Liquid objects can have one of six types:
-
-- [String](#string)
-- [Number](#number)
-- [Boolean](#boolean)
-- [Nil](#nil)
-- [Array](#array)
-- [EmptyDrop](#emptydrop)
-
-You can initialize Liquid variables with the [assign](/tags/#assign) or [capture](/tags/#capture) tags.
-
-## String
-
-Declare a string by wrapping a variable's value in single or double quotes:
-
-```liquid
-{% raw %}
-{% assign my_string = "Hello World!" %}
-{% endraw %}
-```
-
-## Number
-
-Numbers include floats and integers:
-
-```liquid
-{% raw %}
-{% assign my_int = 25 %}
-{% assign my_float = 39.756 %}
-{% endraw %}
-```
-
-## Boolean
-
-Booleans are either `true` or `false`. No quotations are necessary when declaring a boolean:
-
-```liquid
-{% raw %}
-{% assign foo = true %}
-{% assign bar = false %}
-{% endraw %}
-```
-
-## Nil
-
-Nil is a special empty value that is returned when Liquid code has no results. It is **not** a string with the characters "nil".
-
-Nil is [treated as false](/basics/truthy-and-falsy) in the conditions of `if` blocks and other Liquid tags that check the truthfulness of a statement.
-
-In the following example, if the user does not exist (that is, `user` returns `nil`), Liquid will not print the greeting:
-
-```liquid
-{% raw %}
-{% if user %}
-  Hello {{ user.name }}!
-{% endif %}
-{% endraw %}
-```
-
-Tags or outputs that return `nil` will not print anything to the page.
-
-```liquid
-{% raw %}
-The current user is {{ user.name }}
-{% endraw %}
-```
-
-```text
-The current user is
-```
-
-## Array
-
-Arrays hold lists of variables of any type.
-
-### Accessing items in arrays
-
-To access all the items in an array, you can loop through each item in the array using an [iteration tag](/tags/iteration/).
-
-```liquid
-{% raw %}
-<!-- if site.users = "Tobi", "Laura", "Tetsuro", "Adam" -->
-{% for user in site.users %}
-  {{ user }}
-{% endfor %}
-{% endraw %}
-```
-
-```text
-{% raw %}
-Tobi Laura Tetsuro Adam
-{% endraw %}
-```
-
-### Accessing specific items in arrays
-
-You can use square bracket `[` `]` notation to access a specific item in an array. Array indexing starts at zero.
-
-```liquid
-{% raw %}
-<!-- if site.users = "Tobi", "Laura", "Tetsuro", "Adam" -->
-{{ site.users[0] }}
-{{ site.users[1] }}
-{{ site.users[3] }}
-{% endraw %}
-```
-
-```text
-Tobi
-Laura
-Adam
-```
-
-### Initializing arrays
-
-You cannot initialize arrays using only Liquid.
-
-You can, however, use the [split](/filters/split) filter to break a string into an array of substrings.
-
-## EmptyDrop
-
-An EmptyDrop object is returned if you try to access a deleted object by name. In the example below, `page_1`, `page_2` and `page_3` are all EmptyDrop objects.
-
-```liquid
-{% raw %}
-{% assign variable = "hello" %}
-{% assign page_1 = pages[variable] %}
-{% assign page_2 = pages["does-not-exist"] %}
-{% assign page_3 = pages.this-handle-does-not-exist %}
-{% endraw %}
-```
-
-EmptyDrop objects only have one attribute, `empty?`, which is always *true*.
-
-Collections and pages that *do* exist do not have an `empty?` attribute. Their `empty?` is "falsy", which means that calling it inside an if statement will return *false*. When using an `unless` statement on existing collections and pages, `empty?` will return `true`.
-
-### Checking for emptiness
-
-Using the `empty?` attribute, you can check to see if an object exists or not before you access any of its attributes.
-
-```liquid
-{% raw %}
-{% unless pages.about.empty? %}
-  <!-- This will only print if the page with handle 'about' is not empty -->
-  <h1>{{ pages.frontpage.title }}</h1>
-  <div>{{ pages.frontpage.content }}</div>
-{% endunless %}
-{% endraw %}
-```
-
-If you don't check for emptiness first, Liquid might print empty HTML elements to the page:
-
-```html
-<h1></h1>
-<div></div>
-```

example/server/example_servlet.rb

@@ -0,0 +1,41 @@
+module ProductsFilter
+  def price(integer)
+    sprintf("$%.2d USD", integer / 100.0)
+  end
+
+  def prettyprint(text)
+    text.gsub( /\*(.*)\*/, '<b>\1</b>' )
+  end
+
+  def count(array)
+    array.size
+  end
+
+  def paragraph(p)
+    "<p>#{p}</p>"
+  end
+end
+
+class Servlet < LiquidServlet
+
+  def index
+    { 'date' => Time.now }
+  end
+
+  def products
+    { 'products' => products_list, 'description' => description, 'section' => 'Snowboards', 'cool_products' => true}
+  end
+
+  private
+
+  def products_list
+    [{'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
+    {'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling'},
+    {'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity'}]
+  end
+
+  def description
+    "List of Products ~ This is a list of products with price and description."
+  end
+
+end

example/server/liquid_servlet.rb

@@ -0,0 +1,28 @@
+class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
+
+  def do_GET(req, res)
+    handle(:get, req, res)
+  end
+
+  def do_POST(req, res)
+    handle(:post, req, res)
+  end
+
+  private
+
+  def handle(type, req, res)
+    @request, @response = req, res
+
+    @request.path_info =~ /(\w+)\z/
+    @action = $1 || 'index'
+    @assigns = send(@action) if respond_to?(@action)
+
+    @response['Content-Type'] = "text/html"
+    @response.status = 200
+    @response.body = Liquid::Template.parse(read_template).render(@assigns, :filters => [ProductsFilter])
+  end
+
+  def read_template(filename = @action)
+    File.read( File.dirname(__FILE__) + "/templates/#{filename}.liquid" )
+  end
+end

example/server/server.rb

@@ -0,0 +1,14 @@
+require 'webrick'
+require 'rexml/document'
+
+DIR = File.expand_path(File.dirname(__FILE__))
+
+require DIR + '/../../lib/liquid'
+require DIR + '/liquid_servlet'
+require DIR + '/example_servlet'
+
+# Setup webrick
+server = WEBrick::HTTPServer.new( :Port => ARGV[1] || 3000 )
+server.mount('/', Servlet)
+trap("INT"){ server.shutdown }
+server.start

example/server/templates/index.liquid

@@ -0,0 +1,6 @@
+<p>Hello world!</p>
+
+<p>It is {{date}}</p>
+
+
+<p>Check out the <a href="/products">Products</a> screen </p>

example/server/templates/products.liquid

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+  <head>
+    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+    <meta http-equiv="Content-Language" content="en-us" />
+
+    <title>products</title>
+
+    <meta name="ROBOTS" content="ALL" />
+    <meta http-equiv="imagetoolbar" content="no" />
+    <meta name="MSSmartTagsPreventParsing" content="true" />
+    <meta name="Copyright" content="(c) 2005 Copyright content:  Copyright design: Tobias Luetke" />
+    <!-- (c) Copyright 2005 by Tobias Luetke All Rights Reserved. -->
+  </head>
+
+  <body>
+
+    <h1>{{ description | split: '~' | first }}</h1>
+
+    <h2>{{ description | split: '~' | last }}</h2>
+
+    <h2>There are currently {{products | count}} products in the {{section}} catalog</h2>
+
+    {% if cool_products %}
+      Cool products :)
+    {% else %}
+      Uncool products :(
+    {% endif %}
+
+    <ul id="products">
+
+      {% for product in products %}
+        <li>
+          <h2>{{product.name}}</h2>
+          Only {{product.price | price }}
+
+          {{product.description | prettyprint | paragraph }}
+
+          {{ 'it rocks!' | paragraph }}
+
+        </li>
+      {% endfor %}
+
+    </ul>
+
+  </body>
+</html>

feed.xml

@@ -1,30 +0,0 @@
----
-layout: null
----
-<?xml version="1.0" encoding="UTF-8"?>
-<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
-  <channel>
-    <title>{{ site.title | xml_escape }}</title>
-    <description>{{ site.description | xml_escape }}</description>
-    <link>{{ site.url }}{{ site.baseurl }}/</link>
-    <atom:link href="{{ "/feed.xml" | prepend: site.baseurl | prepend: site.url }}" rel="self" type="application/rss+xml"/>
-    <pubDate>{{ site.time | date_to_rfc822 }}</pubDate>
-    <lastBuildDate>{{ site.time | date_to_rfc822 }}</lastBuildDate>
-    <generator>Jekyll v{{ jekyll.version }}</generator>
-    {% for post in site.posts limit:10 %}
-      <item>
-        <title>{{ post.title | xml_escape }}</title>
-        <description>{{ post.content | xml_escape }}</description>
-        <pubDate>{{ post.date | date_to_rfc822 }}</pubDate>
-        <link>{{ post.url | prepend: site.baseurl | prepend: site.url }}</link>
-        <guid isPermaLink="true">{{ post.url | prepend: site.baseurl | prepend: site.url }}</guid>
-        {% for tag in post.tags %}
-        <category>{{ tag | xml_escape }}</category>
-        {% endfor %}
-        {% for cat in post.categories %}
-        <category>{{ cat | xml_escape }}</category>
-        {% endfor %}
-      </item>
-    {% endfor %}
-  </channel>
-</rss>

filters/append.md

@@ -1,29 +0,0 @@
----
-title: append
----
-
-Concatenates two strings and returns the concatenated value.
-
-```liquid
-{% raw %}
-{{ "/my/fancy/url" | append: ".html" }}
-{% endraw %}
-```
-
-```text
-{{ "/my/fancy/url" | append: ".html" }}
-```
-
-`append` can also be used with variables:
-
-```liquid
-{% raw %}
-{% assign filename = "/index.html" %}
-{{ "website.com" | append: filename }}
-{% endraw %}
-```
-
-```text
-{% assign filename = "/index.html" %}
-{{ "website.com" | append: filename }}
-```

filters/capitalize.md

@@ -1,27 +0,0 @@
----
-title: capitalize
----
-
-Makes the first character of a string capitalized.
-
-```liquid
-{% raw %}
-{{ "title" | capitalize }}
-{% endraw %}
-```
-
-```text
-Title
-```
-
-`capitalize` only capitalizes the first character of the string, so later words are not affected:
-
- ```liquid
-{% raw %}
-{{ "my great title" | capitalize }}
-{% endraw %}
-```
-
-```text
-My great title
-```

filters/ceil.md

@@ -1,47 +0,0 @@
----
-title: ceil
----
-
-Rounds the input up to the nearest whole number. Liquid tries to convert the input to a number before the filter is applied.
-
-```liquid
-{% raw %}
-{{ 1.2 | ceil }}
-{% endraw %}
-```
-
-```text
-{{ 1.2 | ceil }}
-```
-
-```liquid
-{% raw %}
-{{ 2.0 | ceil }}
-{% endraw %}
-```
-
-```text
-{{ 2.0 | ceil }}
-```
-
-```liquid
-{% raw %}
-{{ 183.357 | ceil }}
-{% endraw %}
-```
-
-```text
-{{ 183.357 | ceil }}
-```
-
-Here the input value is a string:
-
-```liquid
-{% raw %}
-{{ "3.5" | ceil }}
-{% endraw %}
-```
-
-```text
-{{ "3.5" | ceil }}
-```

filters/date.md

@@ -1,37 +0,0 @@
----
-title: date
----
-
-Converts a timestamp into another date format. The format for this syntax is the same as [`strftime`](//strftime.net).
-
-```liquid
-{% raw %}
-{{ article.published_at | date: "%a, %b %d, %y" }}
-{% endraw %}
-```
-
-```text
-Fri, Jul 17, 15
-```
-
-```liquid
-{% raw %}
-{{ article.published_at | date: "%Y" }}
-{% endraw %}
-```
-
-```text
-2015
-```
-
-`date` works on strings if they contain well-formatted dates:
-
-```liquid
-{% raw %}
-{{ "March 14, 2016" | date: "%b %d, %y" }}
-{% endraw %}
-```
-
-```text
-{{ "March 14, 2016" | date: "%b %d, %y" }}
-```

filters/default.md

@@ -1,44 +0,0 @@
----
-title: default
----
-
-Allows you to specify a fallback in case a value doesn't exist. `default` will show its value if the left side is `nil`, `false`, or empty.
-
-In this example, `product_price` is not defined, so the default value is used.
-
-```liquid
-{% raw %}
-{{ product_price | default: 2.99 }}
-{% endraw %}
-```
-
-```text
-2.99
-```
-
-In this example, `product_price` is defined, so the default value is not used.
-
-```liquid
-{% raw %}
-{% assign product_price = 4.99 %}
-{{ product_price | default: 2.99 }}
-{% endraw %}
-```
-
-```text
-4.99
-```
-
-In this example, `product_price` is empty, so the default value is used.
-
-```liquid
-{% raw %}
-{% assign product_price = "" %}
-{{ product_price | default: 2.99 }}
-{% endraw %}
-```
-
-```text
-2.99
-```
-

filters/divided_by.md

@@ -1,37 +0,0 @@
----
-title: divided_by
----
-
-Divides a number by the specified number.
-
-The result is rounded down to the nearest integer (that is, the [floor](/filters/floor)).
-
-```liquid
-{% raw %}
-{{ 4 | divided_by: 2 }}
-{% endraw %}
-```
-
-```text
-{{ 4 | divided_by: 2 }}
-```
-
-```liquid
-{% raw %}
-{{ 16 | divided_by: 4 }}
-{% endraw %}
-```
-
-```text
-{{ 16 | divided_by: 4 }}
-```
-
-```liquid
-{% raw %}
-{{ 5 | divided_by: 3 }}
-{% endraw %}
-```
-
-```text
-{{ 5 | divided_by: 3 }}
-```

filters/downcase.md

@@ -1,25 +0,0 @@
----
-title: downcase
----
-
-Makes each character in a string lowercase. It has no effect on strings which are already all lowercase.
-
-```liquid
-{% raw %}
-{{ "Parker Moore" | downcase }}
-{% endraw %}
-```
-
-```text
-{{ "Parker Moore" | downcase }}
-```
-
-```liquid
-{% raw %}
-{{ "apple" | downcase }}
-{% endraw %}
-```
-
-```text
-{{ "apple" | downcase }}
-```

filters/escape.md

@@ -1,25 +0,0 @@
----
-title: escape
----
-
-Escapes a string by replacing characters with escape sequences (so that the string can be used in a URL, for example). It doesn't change strings that don't have anything to escape.
-
-```liquid
-{% raw %}
-{{ "Have you read 'James & the Giant Peach'?" | escape }}
-{% endraw %}
-```
-
-```text
-{{ "Have you read 'James & the Giant Peach'?" | escape }}
-```
-
-```liquid
-{% raw %}
-{{ "Tetsuro Takara" | escape }}
-{% endraw %}
-```
-
-```text
-{{ "Tetsuro Takara" | escape }}
-```

filters/escape_once.md

@@ -1,25 +0,0 @@
----
-title: escape_once
----
-
-Escapes a string without changing existing escaped entities. It doesn't change strings that don't have anything to escape.
-
-```liquid
-{% raw %}
-{{ "1 < 2 & 3" | escape_once }}
-{% endraw %}
-```
-
-```text
-{{ "1 < 2 & 3" | escape_once }}
-```
-
-```liquid
-{% raw %}
-{{ "1 &lt; 2 &amp; 3" | escape_once }}
-{% endraw %}
-```
-
-```text
-{{ "1 &lt; 2 &amp; 3" | escape_once }}
-```

filters/first.md

@@ -1,33 +0,0 @@
----
-title: first
----
-
-Returns the first item of an array.
-
-```liquid
-{% raw %}
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array.first }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array.first }}
-```
-
-```liquid
-{% raw %}
-{% assign my_array = "zebra, octopus, giraffe, tiger" | split: ", " %}
-
-{{ my_array.first }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "zebra, octopus, giraffe, tiger" | split: ", " %}
-
-{{ my_array.first }}
-```

filters/floor.md

@@ -1,47 +0,0 @@
----
-title: floor
----
-
-Rounds a number down to the nearest whole number. Liquid tries to convert the input to a number before the filter is applied.
-
-```liquid
-{% raw %}
-{{ 1.2 | floor }}
-{% endraw %}
-```
-
-```text
-{{ 1.2 | floor }}
-```
-
-```liquid
-{% raw %}
-{{ 2.0 | floor }}
-{% endraw %}
-```
-
-```text
-{{ 2.0 | floor }}
-```
-
-```liquid
-{% raw %}
-{{ 183.357 | floor }}
-{% endraw %}
-```
-
-```text
-{{ 183.357 | floor }}
-```
-
-Here the input value is a string:
-
-```liquid
-{% raw %}
-{{ "3.5" | floor }}
-{% endraw %}
-```
-
-```text
-{{ "3.5" | floor }}
-```

filters/index.html

@@ -1,10 +0,0 @@
----
-layout: default
----
-
-{% for doc in site.collections["filters"].docs %}
-  <h2 id="{{ doc.title | slugify }}">{{ doc.title }}</h2>
-  <div class="content">
-    {{ doc.content }}
-  </div>
-{% endfor %}

filters/join.md

@@ -1,19 +0,0 @@
----
-title: join
----
-
-Combines the items in an array into a single string using the argument as a separator.
-
-```liquid
-{% raw %}
-{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}
-
-{{ beatles | join: " and " }}
-{% endraw %}
-```
-
-```text
-{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}
-
-{{ beatles | join: " and " }}
-```

filters/last.md

@@ -1,33 +0,0 @@
----
-title: last
----
-
-Returns the last item of an array.
-
-```liquid
-{% raw %}
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array.last }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array.last }}
-```
-
-```liquid
-{% raw %}
-{% assign my_array = "zebra, octopus, giraffe, tiger" | split: ", " %}
-
-{{ my_array.last }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "zebra, octopus, giraffe, tiger" | split: ", " %}
-
-{{ my_array.last }}
-```

filters/lstrip.md

@@ -1,15 +0,0 @@
----
-title: lstrip
----
-
-Removes all whitespaces (tabs, spaces, and newlines) from the beginning of a string. The filter does not affect spaces between words.
-
-```liquid
-{% raw %}
-{{ "          So much room for activities!          " | lstrip }}
-{% endraw %}
-```
-
-```text
-{{ "          So much room for activities!          " | lstrip }}
-```

filters/map.md

@@ -1,25 +0,0 @@
----
-title: map
----
-
-Creates an array of values by extracting the values of a named property from another object.
-
-In this example, assume the object `site.pages` contains all the metadata for a website. Using `assign` with the `map` filter creates a variable that contains only the values of the `category` properties of everything in the `site.pages` object.
-
-```liquid
-{% raw %}
-{% assign all_categories = site.pages | map: "category" %}
-
-{% for item in all_categories %}
-{{ item }}
-{% endfor %}
-{% endraw %}
-```
-
-```text
-business
-celebrities
-lifestyle
-sports
-technology
-```

filters/minus.md

@@ -1,35 +0,0 @@
----
-title: minus
----
-
-Subtracts a number from another number.
-
-```liquid
-{% raw %}
-{{ 4 | minus: 2 }}
-{% endraw %}
-```
-
-```text
-{{ 4 | minus: 2 }}
-```
-
-```liquid
-{% raw %}
-{{ 16 | minus: 4 }}
-{% endraw %}
-```
-
-```text
-{{ 16 | minus: 4 }}
-```
-
-```liquid
-{% raw %}
-{{ 183.357 | minus: 12 }}
-{% endraw %}
-```
-
-```text
-{{ 183.357 | minus: 12 }}
-```

filters/modulo.md

@@ -1,35 +0,0 @@
----
-title: modulo
----
-
-Returns the remainder of a division operation.
-
-```liquid
-{% raw %}
-{{ 3 | modulo: 2 }}
-{% endraw %}
-```
-
-```text
-{{ 3 | modulo: 2 }}
-```
-
-```liquid
-{% raw %}
-{{ 24 | modulo: 7 }}
-{% endraw %}
-```
-
-```text
-{{ 24 | modulo: 7 }}
-```
-
-```liquid
-{% raw %}
-{{ 183.357 | modulo: 12 }}
-{% endraw %}
-```
-
-```text
-{{ 183.357 | modulo: 12 }}
-```

filters/newline_to_br.md

@@ -1,25 +0,0 @@
----
-title: newline_to_br
----
-
-Replaces every newline (`\n`) with an HTML line break (`<br>`).
-
-```liquid
-{% raw %}
-{% capture string_with_newlines %}
-Hello
-there
-{% endcapture %}
-
-{{ string_with_newlines | newline_to_br }}
-{% endraw %}
-```
-
-```html
-{% capture string_with_newlines %}
-Hello
-there
-{% endcapture %}
-
-{{ string_with_newlines | newline_to_br }}
-```

filters/plus.md

@@ -1,35 +0,0 @@
----
-title: plus
----
-
-Adds a number to another number.
-
-```liquid
-{% raw %}
-{{ 4 | plus: 2 }}
-{% endraw %}
-```
-
-```text
-{{ 4 | plus: 2 }}
-```
-
-```liquid
-{% raw %}
-{{ 16 | plus: 4 }}
-{% endraw %}
-```
-
-```text
-{{ 16 | plus: 4 }}
-```
-
-```liquid
-{% raw %}
-{{ 183.357 | plus: 12 }}
-{% endraw %}
-```
-
-```text
-{{ 183.357 | plus: 12 }}
-```

filters/prepend.md

@@ -1,31 +0,0 @@
----
-title: prepend
----
-
-Adds the specified string to the beginning of another string.
-
-```liquid
-{% raw %}
-{{ "apples, oranges, and bananas" | prepend: "Some fruit: " }}
-{% endraw %}
-```
-
-```text
-{{ "apples, oranges, and bananas" | prepend: "Some fruit: " }}
-```
-
-You can also `prepend` variables:
-
-```liquid
-{% raw %}
-{% assign url = "liquidmarkup.com" %}
-
-{{ "/index.html" | prepend: url }}
-{% endraw %}
-```
-
-```text
-{% assign url = "liquidmarkup.com" %}
-
-{{ "/index.html" | prepend: url }}
-```

filters/remove.md

@@ -1,15 +0,0 @@
----
-title: remove
----
-
-Removes every occurrence of the specified substring from a string.
-
-```liquid
-{% raw %}
-{{ "I strained to see the train through the rain" | remove: "rain" }}
-{% endraw %}
-```
-
-```text
-{{ "I strained to see the train through the rain" | remove: "rain" }}
-```

filters/remove_first.md

@@ -1,15 +0,0 @@
----
-title: remove_first
----
-
-Removes only the first occurrence of the specified substring from a string.
-
-```liquid
-{% raw %}
-{{ "I strained to see the train through the rain" | remove_first: "rain" }}
-{% endraw %}
-```
-
-```text
-{{ "I strained to see the train through the rain" | remove_first: "rain" }}
-```

filters/replace.md

@@ -1,15 +0,0 @@
----
-title: replace
----
-
-Replaces every occurrence of an argument in a string with the second argument.
-
-```liquid
-{% raw %}
-{{ "Take my protein pills and put my helmet on" | replace: "my", "your" }}
-{% endraw %}
-```
-
-```text
-{{ "Take my protein pills and put my helmet on" | replace: "my", "your" }}
-```

filters/replace_first.md

@@ -1,17 +0,0 @@
----
-title: replace_first
----
-
-Replaces only the first occurrence of the first argument in a string with the second argument.
-
-```liquid
-{% raw %}
-{% assign my_string = "Take my protein pills and put my helmet on" %}
-{{ my_string | replace_first: "my", "your" }}
-{% endraw %}
-```
-
-```text
-{% assign my_string = "Take my protein pills and put my helmet on" %}
-{{ my_string | replace_first: "my", "your" }}
-```

filters/reverse.md

@@ -1,31 +0,0 @@
----
-title: reverse
----
-
-Reverses the order of the items in an array. `reverse` cannot reverse a string.
-
-```liquid
-{% raw %}
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array | reverse | join: ", " }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array | reverse | join: ", " }}
-```
-
-`reverse` cannot be used directly on a string, but you can split a string into an array, reverse the array, and rejoin it by chaining together filters:
-
-```liquid
-{% raw %}
-{{ "Ground control to Major Tom." | split: "" | reverse | join: "" }}
-{% endraw %}
-```
-
-```text
-{{ "Ground control to Major Tom." | split: "" | reverse | join: "" }}
-```

filters/round.md

@@ -1,35 +0,0 @@
----
-title: round
----
-
-Rounds an input number to the nearest integer or, if a number is specified as an argument, to that number of decimal places.
-
-```liquid
-{% raw %}
-{{ 1.2 | round }}
-{% endraw %}
-```
-
-```text
-{{ 1.2 | round }}
-```
-
-```liquid
-{% raw %}
-{{ 2.7 | round }}
-{% endraw %}
-```
-
-```text
-{{ 2.7 | round }}
-```
-
-```liquid
-{% raw %}
-{{ 183.357 | round: 2 }}
-{% endraw %}
-```
-
-```text
-{{ 183.357 | round: 2 }}
-```

filters/rstrip.md

@@ -1,15 +0,0 @@
----
-title: rstrip
----
-
-Removes all whitespace (tabs, spaces, and newlines) from the right side of a string.
-
-```liquid
-{% raw %}
-{{ "          So much room for activities!          " | rstrip }}
-{% endraw %}
-```
-
-```text
-{{ "          So much room for activities!          " | rstrip }}
-```

filters/size.md

@@ -1,39 +0,0 @@
----
-title: size
----
-
-Returns the number of characters in a string or the number of items in an array. `size` can also be used with dot notation (for example, `{% raw %}{{ my_string.size }}{% endraw %}`). This allows you to use `size` inside  tags such as conditionals.
-
-```liquid
-{% raw %}
-{{ "Ground control to Major Tom." | size }}
-{% endraw %}
-```
-
-```text
-{{ "Ground control to Major Tom." | size }}
-```
-
-```liquid
-{% raw %}
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array | size }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "apples, oranges, peaches, plums" | split: ", " %}
-
-{{ my_array | size }}
-```
-
-Using dot notation:
-
-```liquid
-{% raw %}
-{% if site.pages.size > 10 %}
-  This is a big website!
-{% endif %}
-{% endraw %}
-```

filters/slice.md

@@ -1,49 +0,0 @@
----
-title: slice
----
-
-Returns a substring of 1 character beginning at the index specified by the argument passed in. An optional second argument specifies the length of the substring to be returned.
-
-String indices are numbered starting from 0.
-
-```liquid
-{% raw %}
-{{ "Liquid" | slice: 0 }}
-{% endraw %}
-```
-
-```text
-{{ "Liquid" | slice: 0 }}
-```
-
-```liquid
-{% raw %}
-{{ "Liquid" | slice: 2 }}
-{% endraw %}
-```
-
-```text
-{{ "Liquid" | slice: 2 }}
-```
-
-```liquid
-{% raw %}
-{{ "Liquid" | slice: 2, 5 }}
-{% endraw %}
-```
-
-```text
-{{ "Liquid" | slice: 2, 5 }}
-```
-
-If the first parameter is a negative number, the indices are counted from the end of the string:
-
-```liquid
-{% raw %}
-{{ "Liquid" | slice: -3, 2 }}
-{% endraw %}
-```
-
-```text
-{{ "Liquid" | slice: -3, 2 }}
-```

filters/sort.md

@@ -1,19 +0,0 @@
----
-title: sort
----
-
-Sorts items in an array by a property of an item in the array. The order of the sorted array is case-sensitive.
-
-```liquid
-{% raw %}
-{% assign my_array = "zebra, octopus, giraffe, Sally Snake" | split: ", " %}
-
-{{ my_array | sort | join: ", " }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "zebra, octopus, giraffe, Sally Snake" | split: ", " %}
-
-{{ my_array | sort | join: ", " }}
-```

filters/split.md

@@ -1,23 +0,0 @@
----
-title: split
----
-
-Divides an input string into an array using the argument as a separator. `split` is commonly used to convert comma-separated items from a string to an array.
-
-```liquid
-{% raw %}
-{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}
-
-{% for member in beatles %}
-  {{ member }}
-{% endfor %}
-{% endraw %}
-```
-
-```text
-{% assign beatles = "John, Paul, George, Ringo" | split: ", " %}
-
-{% for member in beatles %}
-  {{ member }}
-{% endfor %}
-```

filters/strip.md

@@ -1,15 +0,0 @@
----
-title: strip
----
-
-Removes all whitespace (tabs, spaces, and newlines) from both the left and right side of a string. It does not affect spaces between words.
-
-```liquid
-{% raw %}
-{{ "          So much room for activities!          " | strip }}
-{% endraw %}
-```
-
-```text
-{{ "          So much room for activities!          " | strip }}
-```

filters/strip_html.md

@@ -1,15 +0,0 @@
----
-title: strip_html
----
-
-Removes any HTML tags from a string.
-
-```liquid
-{% raw %}
-{{ "Have <em>you</em> read <strong>Ulysses</strong>?" | strip_html }}
-{% endraw %}
-```
-
-```text
-{{ "Have <em>you</em> read <strong>Ulysses</strong>?" | strip_html }}
-```

filters/strip_newlines.md

@@ -1,26 +0,0 @@
----
-title: strip_newlines
----
-
-Removes any newline characters (line breaks) from a string.
-
-```liquid
-{% raw %}
-{% capture string_with_newlines %}
-Hello
-there
-{% endcapture %}
-
-{{ string_with_newlines | strip_newlines }}
-{% endraw %}
-```
-
-```html
-{% capture string_with_newlines %}
-Hello
-there
-{% endcapture %}
-
-{{ string_with_newlines | strip_newlines }}
-```
-

filters/times.md

@@ -1,35 +0,0 @@
----
-title: times
----
-
-Multiplies a number by another number.
-
-```liquid
-{% raw %}
-{{ 3 | times: 2 }}
-{% endraw %}
-```
-
-```text
-{{ 3 | times: 2 }}
-```
-
-```liquid
-{% raw %}
-{{ 24 | times: 7 }}
-{% endraw %}
-```
-
-```text
-{{ 24 | times: 7 }}
-```
-
-```liquid
-{% raw %}
-{{ 183.357 | times: 12 }}
-{% endraw %}
-```
-
-```text
-{{ 183.357 | times: 12 }}
-```

filters/truncate.md

@@ -1,15 +0,0 @@
----
-title: truncate
----
-
-`truncate` shortens a string  down to the number of characters passed as a parameter. If the number of characters specified is less than the length of the string, an ellipsis (...) is appended to the string and is included in the character count.
-
-```liquid
-{% raw %}
-{{ "Ground control to Major Tom." | truncate: 20 }}
-{% endraw %}
-```
-
-```text
-{{ "Ground control to Major Tom." | truncate: 20 }}
-```

filters/truncatewords.md

@@ -1,15 +0,0 @@
----
-title: truncatewords
----
-
-Shortens a string down to the number of words passed as the argument. If the specified number of words is less than the number of words in the string, an ellipsis (...) is appended to the string.
-
-```liquid
-{% raw %}
-{{ "Ground control to Major Tom." | truncatewords: 3 }}
-{% endraw %}
-```
-
-```text
-{{ "Ground control to Major Tom." | truncatewords: 3 }}
-```

filters/uniq.md

@@ -1,19 +0,0 @@
----
-title: uniq
----
-
-Removes any duplicate elements in an array.
-
-```liquid
-{% raw %}
-{% assign my_array = "ants, bugs, bees, bugs, ants" | split: ", " %}
-
-{{ my_array | uniq | join: ", " }}
-{% endraw %}
-```
-
-```text
-{% assign my_array = "ants, bugs, bees, bugs, ants" | split: ", " %}
-
-{{ my_array | uniq | join: ", " }}
-```

filters/upcase.md

@@ -1,25 +0,0 @@
----
-title: upcase
----
-
-Makes each character in a string uppercase. It has no effect on strings which are already all uppercase.
-
-```liquid
-{% raw %}
-{{ "Parker Moore" | upcase }}
-{% endraw %}
-```
-
-```text
-{{ "Parker Moore" | upcase }}
-```
-
-```liquid
-{% raw %}
-{{ "APPLE" | upcase }}
-{% endraw %}
-```
-
-```text
-{{ "APPLE" | upcase }}
-```

filters/url_encode.md

@@ -1,25 +0,0 @@
----
-title: url_encode
----
-
-Converts any URL-unsafe characters in a string into percent-encoded characters.
-
-```liquid
-{% raw %}
-{{ "[email protected]" | url_encode }}
-{% endraw %}
-```
-
-```text
-{{ "[email protected]" | url_encode }}
-```
-
-```liquid
-{% raw %}
-{{ "Tetsuro Takara" | url_encode }}
-{% endraw %}
-```
-
-```text
-{{ "Tetsuro Takara" | url_encode }}
-```

index.md

@@ -1,16 +0,0 @@
----
-layout: default
----
-
-{% include home-banner.html %}
-
-## What is Liquid?
-
-Liquid is an open-source template language created by [Shopify](https://www.shopify.com) and written in Ruby. It is the backbone of Shopify themes and is used to load dynamic content on storefronts.
-
-Liquid has been in production use since June 2006 and is now used by many other hosted web applications.
-
-## Who uses Liquid?
-
-{% include home-users-grid.html %}
-

lib/liquid.rb

@@ -0,0 +1,77 @@
+# Copyright (c) 2005 Tobias Luetke
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+module Liquid
+  FilterSeparator             = /\|/
+  ArgumentSeparator           = ','.freeze
+  FilterArgumentSeparator     = ':'.freeze
+  VariableAttributeSeparator  = '.'.freeze
+  TagStart                    = /\{\%/
+  TagEnd                      = /\%\}/
+  VariableSignature           = /\(?[\w\-\.\[\]]\)?/
+  VariableSegment             = /[\w\-]/
+  VariableStart               = /\{\{/
+  VariableEnd                 = /\}\}/
+  VariableIncompleteEnd       = /\}\}?/
+  QuotedString                = /"[^"]*"|'[^']*'/
+  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/o
+  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/o
+  AnyStartingTag              = /\{\{|\{\%/
+  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/om
+  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/om
+  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/o
+
+  singleton_class.send(:attr_accessor, :cache_classes)
+  self.cache_classes = true
+end
+
+require "liquid/version"
+require 'liquid/lexer'
+require 'liquid/parser'
+require 'liquid/i18n'
+require 'liquid/drop'
+require 'liquid/extensions'
+require 'liquid/errors'
+require 'liquid/interrupts'
+require 'liquid/strainer'
+require 'liquid/expression'
+require 'liquid/context'
+require 'liquid/parser_switching'
+require 'liquid/tag'
+require 'liquid/block'
+require 'liquid/document'
+require 'liquid/variable'
+require 'liquid/variable_lookup'
+require 'liquid/range_lookup'
+require 'liquid/file_system'
+require 'liquid/template'
+require 'liquid/standardfilters'
+require 'liquid/condition'
+require 'liquid/module_ex'
+require 'liquid/utils'
+require 'liquid/token'
+
+# Load all the tags of the standard library
+#
+Dir[File.dirname(__FILE__) + '/liquid/tags/*.rb'].each { |f| require f }
+
+require 'liquid/profiler'
+require 'liquid/profiler/hooks'

lib/liquid/block.rb

@@ -0,0 +1,166 @@
+module Liquid
+  class Block < Tag
+    FullToken         = /\A#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
+    ContentOfVariable = /\A#{VariableStart}(.*)#{VariableEnd}\z/om
+    TAGSTART = "{%".freeze
+    VARSTART = "{{".freeze
+
+    def blank?
+      @blank
+    end
+
+    def parse(tokens)
+      @blank = true
+      @nodelist ||= []
+      @nodelist.clear
+
+      # All child tags of the current block.
+      @children = []
+
+      while token = tokens.shift
+        unless token.empty?
+          case
+          when token.start_with?(TAGSTART)
+            if token =~ FullToken
+
+              # if we found the proper block delimiter just end parsing here and let the outer block
+              # proceed
+              if block_delimiter == $1
+                end_tag
+                return
+              end
+
+              # fetch the tag from registered blocks
+              if tag = Template.tags[$1]
+                markup = token.is_a?(Token) ? token.child($2) : $2
+                new_tag = tag.parse($1, markup, tokens, @options)
+                new_tag.line_number = token.line_number if token.is_a?(Token)
+                @blank &&= new_tag.blank?
+                @nodelist << new_tag
+                @children << new_tag
+              else
+                # this tag is not registered with the system
+                # pass it to the current block for special handling or error reporting
+                unknown_tag($1, $2, tokens)
+              end
+            else
+              raise SyntaxError.new(options[:locale].t("errors.syntax.tag_termination".freeze, :token => token, :tag_end => TagEnd.inspect))
+            end
+          when token.start_with?(VARSTART)
+            new_var = create_variable(token)
+            new_var.line_number = token.line_number if token.is_a?(Token)
+            @nodelist << new_var
+            @children << new_var
+            @blank = false
+          else
+            @nodelist << token
+            @blank &&= (token =~ /\A\s*\z/)
+          end
+        end
+      end
+
+      # Make sure that it's ok to end parsing in the current block.
+      # Effectively this method will throw an exception unless the current block is
+      # of type Document
+      assert_missing_delimitation!
+    end
+
+    # warnings of this block and all sub-tags
+    def warnings
+      all_warnings = []
+      all_warnings.concat(@warnings) if @warnings
+
+      (@children || []).each do |node|
+        all_warnings.concat(node.warnings || [])
+      end
+
+      all_warnings
+    end
+
+    def end_tag
+    end
+
+    def unknown_tag(tag, params, tokens)
+      case tag
+      when 'else'.freeze
+        raise SyntaxError.new(options[:locale].t("errors.syntax.unexpected_else".freeze,
+                                                 :block_name => block_name))
+      when 'end'.freeze
+        raise SyntaxError.new(options[:locale].t("errors.syntax.invalid_delimiter".freeze,
+                                                 :block_name => block_name,
+                                                 :block_delimiter => block_delimiter))
+      else
+        raise SyntaxError.new(options[:locale].t("errors.syntax.unknown_tag".freeze, :tag => tag))
+      end
+    end
+
+    def block_name
+      @tag_name
+    end
+
+    def block_delimiter
+      @block_delimiter ||= "end#{block_name}"
+    end
+
+    def create_variable(token)
+      token.scan(ContentOfVariable) do |content|
+        markup = token.is_a?(Token) ? token.child(content.first) : content.first
+        return Variable.new(markup, @options)
+      end
+      raise SyntaxError.new(options[:locale].t("errors.syntax.variable_termination".freeze, :token => token, :tag_end => VariableEnd.inspect))
+    end
+
+    def render(context)
+      render_all(@nodelist, context)
+    end
+
+    protected
+
+    def assert_missing_delimitation!
+      raise SyntaxError.new(options[:locale].t("errors.syntax.tag_never_closed".freeze, :block_name => block_name))
+    end
+
+    def render_all(list, context)
+      output = []
+      context.resource_limits[:render_length_current] = 0
+      context.resource_limits[:render_score_current] += list.length
+
+      list.each do |token|
+        # Break out if we have any unhanded interrupts.
+        break if context.has_interrupt?
+
+        begin
+          # If we get an Interrupt that means the block must stop processing. An
+          # Interrupt is any command that stops block execution such as {% break %}
+          # or {% continue %}
+          if token.is_a? Continue or token.is_a? Break
+            context.push_interrupt(token.interrupt)
+            break
+          end
+
+          token_output = render_token(token, context)
+
+          unless token.is_a?(Block) && token.blank?
+            output << token_output
+          end
+        rescue MemoryError => e
+          raise e
+        rescue ::StandardError => e
+          output << (context.handle_error(e, token))
+        end
+      end
+
+      output.join
+    end
+
+    def render_token(token, context)
+      token_output = (token.respond_to?(:render) ? token.render(context) : token)
+      context.increment_used_resources(:render_length_current, token_output)
+      if context.resource_limits_reached?
+        context.resource_limits[:reached] = true
+        raise MemoryError.new("Memory limits exceeded".freeze)
+      end
+      token_output
+    end
+  end
+end

lib/liquid/condition.rb

@@ -0,0 +1,126 @@
+module Liquid
+  # Container for liquid nodes which conveniently wraps decision making logic
+  #
+  # Example:
+  #
+  #   c = Condition.new('1', '==', '1')
+  #   c.evaluate #=> true
+  #
+  class Condition #:nodoc:
+    @@operators = {
+      '=='.freeze => lambda { |cond, left, right|  cond.send(:equal_variables, left, right) },
+      '!='.freeze => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
+      '<>'.freeze => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
+      '<'.freeze  => :<,
+      '>'.freeze  => :>,
+      '>='.freeze => :>=,
+      '<='.freeze => :<=,
+      'contains'.freeze => lambda { |cond, left, right|
+        left && right && left.respond_to?(:include?) ? left.include?(right) : false
+      }
+    }
+
+    def self.operators
+      @@operators
+    end
+
+    attr_reader :attachment
+    attr_accessor :left, :operator, :right
+
+    def initialize(left = nil, operator = nil, right = nil)
+      @left, @operator, @right = left, operator, right
+      @child_relation  = nil
+      @child_condition = nil
+    end
+
+    def evaluate(context = Context.new)
+      result = interpret_condition(left, right, operator, context)
+
+      case @child_relation
+      when :or
+        result || @child_condition.evaluate(context)
+      when :and
+        result && @child_condition.evaluate(context)
+      else
+        result
+      end
+    end
+
+    def or(condition)
+      @child_relation, @child_condition = :or, condition
+    end
+
+    def and(condition)
+      @child_relation, @child_condition = :and, condition
+    end
+
+    def attach(attachment)
+      @attachment = attachment
+    end
+
+    def else?
+      false
+    end
+
+    def inspect
+      "#<Condition #{[@left, @operator, @right].compact.join(' '.freeze)}>"
+    end
+
+    private
+
+    def equal_variables(left, right)
+      if left.is_a?(Symbol)
+        if right.respond_to?(left)
+          return right.send(left.to_s)
+        else
+          return nil
+        end
+      end
+
+      if right.is_a?(Symbol)
+        if left.respond_to?(right)
+          return left.send(right.to_s)
+        else
+          return nil
+        end
+      end
+
+      left == right
+    end
+
+    def interpret_condition(left, right, op, context)
+      # If the operator is empty this means that the decision statement is just
+      # a single variable. We can just poll this variable from the context and
+      # return this as the result.
+      return context[left] if op == nil
+
+      left, right = context[left], context[right]
+
+      operation = self.class.operators[op] || raise(Liquid::ArgumentError.new("Unknown operator #{op}"))
+
+      if operation.respond_to?(:call)
+        operation.call(self, left, right)
+      elsif left.respond_to?(operation) and right.respond_to?(operation)
+        begin
+          left.send(operation, right)
+        rescue ::ArgumentError => e
+          raise Liquid::ArgumentError.new(e.message)
+        end
+      else
+        nil
+      end
+    end
+  end
+
+
+  class ElseCondition < Condition
+    def else?
+      true
+    end
+
+    def evaluate(context)
+      true
+    end
+  end
+
+end

lib/liquid/context.rb

@@ -0,0 +1,233 @@
+module Liquid
+
+  # Context keeps the variable stack and resolves variables, as well as keywords
+  #
+  #   context['variable'] = 'testing'
+  #   context['variable'] #=> 'testing'
+  #   context['true']     #=> true
+  #   context['10.2232']  #=> 10.2232
+  #
+  #   context.stack do
+  #      context['bob'] = 'bobsen'
+  #   end
+  #
+  #   context['bob']  #=> nil  class Context
+  class Context
+    attr_reader :scopes, :errors, :registers, :environments, :resource_limits
+    attr_accessor :exception_handler
+
+    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil)
+      @environments     = [environments].flatten
+      @scopes           = [(outer_scope || {})]
+      @registers        = registers
+      @errors           = []
+      @resource_limits  = resource_limits || Template.default_resource_limits
+      @resource_limits[:render_score_current] = 0
+      @resource_limits[:assign_score_current] = 0
+      @parsed_expression = Hash.new{ |cache, markup| cache[markup] = Expression.parse(markup) }
+      squash_instance_assigns_with_environments
+
+      @this_stack_used = false
+
+      if rethrow_errors
+        self.exception_handler = ->(e) { true }
+      end
+
+      @interrupts = []
+      @filters = []
+    end
+
+    def increment_used_resources(key, obj)
+      @resource_limits[key] += if obj.kind_of?(String) || obj.kind_of?(Array) || obj.kind_of?(Hash)
+        obj.length
+      else
+        1
+      end
+    end
+
+    def resource_limits_reached?
+      (@resource_limits[:render_length_limit] && @resource_limits[:render_length_current] > @resource_limits[:render_length_limit]) ||
+      (@resource_limits[:render_score_limit]  && @resource_limits[:render_score_current]  > @resource_limits[:render_score_limit] ) ||
+      (@resource_limits[:assign_score_limit]  && @resource_limits[:assign_score_current]  > @resource_limits[:assign_score_limit] )
+    end
+
+    def strainer
+      @strainer ||= Strainer.create(self, @filters)
+    end
+
+    # Adds filters to this context.
+    #
+    # Note that this does not register the filters with the main Template object. see <tt>Template.register_filter</tt>
+    # for that
+    def add_filters(filters)
+      filters = [filters].flatten.compact
+      filters.each do |f|
+        raise ArgumentError, "Expected module but got: #{f.class}" unless f.is_a?(Module)
+        Strainer.add_known_filter(f)
+      end
+
+      # If strainer is already setup then there's no choice but to use a runtime
+      # extend call. If strainer is not yet created, we can utilize strainers
+      # cached class based API, which avoids busting the method cache.
+      if @strainer
+        filters.each do |f|
+          strainer.extend(f)
+        end
+      else
+        @filters.concat filters
+      end
+    end
+
+    # are there any not handled interrupts?
+    def has_interrupt?
+      !@interrupts.empty?
+    end
+
+    # push an interrupt to the stack. this interrupt is considered not handled.
+    def push_interrupt(e)
+      @interrupts.push(e)
+    end
+
+    # pop an interrupt from the stack
+    def pop_interrupt
+      @interrupts.pop
+    end
+
+
+    def handle_error(e, token=nil)
+      if e.is_a?(Liquid::Error)
+        e.set_line_number_from_token(token)
+      end
+
+      errors.push(e)
+      raise if exception_handler && exception_handler.call(e)
+      Liquid::Error.render(e)
+    end
+
+    def invoke(method, *args)
+      strainer.invoke(method, *args).to_liquid
+    end
+
+    # Push new local scope on the stack. use <tt>Context#stack</tt> instead
+    def push(new_scope={})
+      @scopes.unshift(new_scope)
+      raise StackLevelError, "Nesting too deep".freeze if @scopes.length > 100
+    end
+
+    # Merge a hash of variables in the current local scope
+    def merge(new_scopes)
+      @scopes[0].merge!(new_scopes)
+    end
+
+    # Pop from the stack. use <tt>Context#stack</tt> instead
+    def pop
+      raise ContextError if @scopes.size == 1
+      @scopes.shift
+    end
+
+    # Pushes a new local scope on the stack, pops it at the end of the block
+    #
+    # Example:
+    #   context.stack do
+    #      context['var'] = 'hi'
+    #   end
+    #
+    #   context['var]  #=> nil
+    def stack(new_scope=nil)
+      old_stack_used = @this_stack_used
+      if new_scope
+        push(new_scope)
+        @this_stack_used = true
+      else
+        @this_stack_used = false
+      end
+
+      yield
+    ensure
+      pop if @this_stack_used
+      @this_stack_used = old_stack_used
+    end
+
+    def clear_instance_assigns
+      @scopes[0] = {}
+    end
+
+    # Only allow String, Numeric, Hash, Array, Proc, Boolean or <tt>Liquid::Drop</tt>
+    def []=(key, value)
+      unless @this_stack_used
+        @this_stack_used = true
+        push({})
+      end
+      @scopes[0][key] = value
+    end
+
+    # Look up variable, either resolve directly after considering the name. We can directly handle
+    # Strings, digits, floats and booleans (true,false).
+    # If no match is made we lookup the variable in the current scope and
+    # later move up to the parent blocks to see if we can resolve the variable somewhere up the tree.
+    # Some special keywords return symbols. Those symbols are to be called on the rhs object in expressions
+    #
+    # Example:
+    #   products == empty #=> products.empty?
+    def [](expression)
+      evaluate(@parsed_expression[expression])
+    end
+
+    def has_key?(key)
+      self[key] != nil
+    end
+
+    def evaluate(object)
+      object.respond_to?(:evaluate) ? object.evaluate(self) : object
+    end
+
+    # Fetches an object starting at the local scope and then moving up the hierachy
+    def find_variable(key)
+
+      # This was changed from find() to find_index() because this is a very hot
+      # path and find_index() is optimized in MRI to reduce object allocation
+      index = @scopes.find_index { |s| s.has_key?(key) }
+      scope = @scopes[index] if index
+
+      variable = nil
+
+      if scope.nil?
+        @environments.each do |e|
+          variable = lookup_and_evaluate(e, key)
+          unless variable.nil?
+            scope = e
+            break
+          end
+        end
+      end
+
+      scope     ||= @environments.last || @scopes.last
+      variable  ||= lookup_and_evaluate(scope, key)
+
+      variable = variable.to_liquid
+      variable.context = self if variable.respond_to?(:context=)
+
+      return variable
+    end
+
+    def lookup_and_evaluate(obj, key)
+      if (value = obj[key]).is_a?(Proc) && obj.respond_to?(:[]=)
+        obj[key] = (value.arity == 0) ? value.call : value.call(self)
+      else
+        value
+      end
+    end
+
+    private
+      def squash_instance_assigns_with_environments
+        @scopes.last.each_key do |k|
+          @environments.each do |env|
+            if env.has_key?(k)
+              scopes.last[k] = lookup_and_evaluate(env, k)
+              break
+            end
+          end
+        end
+      end # squash_instance_assigns_with_environments
+  end # Context
+end # Liquid

lib/liquid/document.rb

@@ -0,0 +1,17 @@
+module Liquid
+  class Document < Block
+    def self.parse(tokens, options={})
+      # we don't need markup to open this block
+      super(nil, nil, tokens, options)
+    end
+
+    # There isn't a real delimiter
+    def block_delimiter
+      []
+    end
+
+    # Document blocks don't need to be terminated since they are not actually opened
+    def assert_missing_delimitation!
+    end
+  end
+end

lib/liquid/drop.rb

@@ -0,0 +1,77 @@
+require 'set'
+
+module Liquid
+
+  # A drop in liquid is a class which allows you to export DOM like things to liquid.
+  # Methods of drops are callable.
+  # The main use for liquid drops is to implement lazy loaded objects.
+  # If you would like to make data available to the web designers which you don't want loaded unless needed then
+  # a drop is a great way to do that.
+  #
+  # Example:
+  #
+  #   class ProductDrop < Liquid::Drop
+  #     def top_sales
+  #       Shop.current.products.find(:all, :order => 'sales', :limit => 10 )
+  #     end
+  #   end
+  #
+  #   tmpl = Liquid::Template.parse( ' {% for product in product.top_sales %} {{ product.name }} {%endfor%} '  )
+  #   tmpl.render('product' => ProductDrop.new ) # will invoke top_sales query.
+  #
+  # Your drop can either implement the methods sans any parameters or implement the before_method(name) method which is a
+  # catch all.
+  class Drop
+    attr_writer :context
+
+    EMPTY_STRING = ''.freeze
+
+    # Catch all for the method
+    def before_method(method)
+      nil
+    end
+
+    # called by liquid to invoke a drop
+    def invoke_drop(method_or_key)
+      if method_or_key && method_or_key != EMPTY_STRING && self.class.invokable?(method_or_key)
+        send(method_or_key)
+      else
+        before_method(method_or_key)
+      end
+    end
+
+    def has_key?(name)
+      true
+    end
+
+    def inspect
+      self.class.to_s
+    end
+
+    def to_liquid
+      self
+    end
+
+    def to_s
+      self.class.name
+    end
+
+    alias :[] :invoke_drop
+
+    private
+
+    # Check for method existence without invoking respond_to?, which creates symbols
+    def self.invokable?(method_name)
+      unless @invokable_methods
+        blacklist = Liquid::Drop.public_instance_methods + [:each]
+        if include?(Enumerable)
+          blacklist += Enumerable.public_instance_methods
+          blacklist -= [:sort, :count, :first, :min, :max, :include?]
+        end
+        whitelist = [:to_liquid] + (public_instance_methods - blacklist)
+        @invokable_methods = Set.new(whitelist.map(&:to_s))
+      end
+      @invokable_methods.include?(method_name.to_s)
+    end
+  end
+end

lib/liquid/errors.rb

@@ -0,0 +1,59 @@
+module Liquid
+  class Error < ::StandardError
+    attr_accessor :line_number
+    attr_accessor :markup_context
+
+    def to_s(with_prefix=true)
+      str = ""
+      str << message_prefix if with_prefix
+      str << super()
+
+      if markup_context
+        str << " "
+        str << markup_context
+      end
+
+      str
+    end
+
+    def set_line_number_from_token(token)
+      return unless token.respond_to?(:line_number)
+      self.line_number = token.line_number
+    end
+
+    def self.render(e)
+      if e.is_a?(Liquid::Error)
+        e.to_s
+      else
+        "Liquid error: #{e.to_s}"
+      end
+    end
+
+    private
+
+    def message_prefix
+      str = ""
+      if is_a?(SyntaxError)
+        str << "Liquid syntax error"
+      else
+        str << "Liquid error"
+      end
+
+      if line_number
+        str << " (line #{line_number})"
+      end
+
+      str << ": "
+      str
+    end
+  end
+
+  class ArgumentError < Error; end
+  class ContextError < Error; end
+  class FilterNotFound < Error; end
+  class FileSystemError < Error; end
+  class StandardError < Error; end
+  class SyntaxError < Error; end
+  class StackLevelError < Error; end
+  class MemoryError < Error; end
+end

lib/liquid/expression.rb

@@ -0,0 +1,33 @@
+module Liquid
+  class Expression
+    LITERALS = {
+      nil => nil, 'nil'.freeze => nil, 'null'.freeze => nil, ''.freeze => nil,
+      'true'.freeze  => true,
+      'false'.freeze => false,
+      'blank'.freeze => :blank?,
+      'empty'.freeze => :empty?
+    }
+
+    def self.parse(markup)
+      if LITERALS.key?(markup)
+        LITERALS[markup]
+      else
+        case markup
+        when /\A'(.*)'\z/m # Single quoted strings
+          $1
+        when /\A"(.*)"\z/m # Double quoted strings
+          $1
+        when /\A(-?\d+)\z/ # Integer and floats
+          $1.to_i
+        when /\A\((\S+)\.\.(\S+)\)\z/ # Ranges
+          RangeLookup.parse($1, $2)
+        when /\A(-?\d[\d\.]+)\z/ # Floats
+          $1.to_f
+        else
+          VariableLookup.parse(markup)
+        end
+      end
+    end
+
+  end
+end

lib/liquid/extensions.rb

@@ -0,0 +1,62 @@
+require 'time'
+require 'date'
+
+class String # :nodoc:
+  def to_liquid
+    self
+  end
+end
+
+class Array  # :nodoc:
+  def to_liquid
+    self
+  end
+end
+
+class Hash  # :nodoc:
+  def to_liquid
+    self
+  end
+end
+
+class Numeric  # :nodoc:
+  def to_liquid
+    self
+  end
+end
+
+class Time  # :nodoc:
+  def to_liquid
+    self
+  end
+end
+
+class DateTime < Date  # :nodoc:
+  def to_liquid
+    self
+  end
+end
+
+class Date  # :nodoc:
+  def to_liquid
+    self
+  end
+end
+
+class TrueClass
+  def to_liquid  # :nodoc:
+    self
+  end
+end
+
+class FalseClass
+  def to_liquid # :nodoc:
+    self
+  end
+end
+
+class NilClass
+  def to_liquid # :nodoc:
+    self
+  end
+end

lib/liquid/file_system.rb

@@ -0,0 +1,73 @@
+module Liquid
+  # A Liquid file system is a way to let your templates retrieve other templates for use with the include tag.
+  #
+  # You can implement subclasses that retrieve templates from the database, from the file system using a different
+  # path structure, you can provide them as hard-coded inline strings, or any manner that you see fit.
+  #
+  # You can add additional instance variables, arguments, or methods as needed.
+  #
+  # Example:
+  #
+  # Liquid::Template.file_system = Liquid::LocalFileSystem.new(template_path)
+  # liquid = Liquid::Template.parse(template)
+  #
+  # This will parse the template with a LocalFileSystem implementation rooted at 'template_path'.
+  class BlankFileSystem
+    # Called by Liquid to retrieve a template file
+    def read_template_file(template_path, context)
+      raise FileSystemError, "This liquid context does not allow includes."
+    end
+  end
+
+  # This implements an abstract file system which retrieves template files named in a manner similar to Rails partials,
+  # ie. with the template name prefixed with an underscore. The extension ".liquid" is also added.
+  #
+  # For security reasons, template paths are only allowed to contain letters, numbers, and underscore.
+  #
+  # Example:
+  #
+  # file_system = Liquid::LocalFileSystem.new("/some/path")
+  #
+  # file_system.full_path("mypartial")       # => "/some/path/_mypartial.liquid"
+  # file_system.full_path("dir/mypartial")   # => "/some/path/dir/_mypartial.liquid"
+  #
+  # Optionally in the second argument you can specify a custom pattern for template filenames.
+  # The Kernel::sprintf format specification is used.
+  # Default pattern is "_%s.liquid".
+  #
+  # Example:
+  #
+  # file_system = Liquid::LocalFileSystem.new("/some/path", "%s.html")
+  #
+  # file_system.full_path("index") # => "/some/path/index.html"
+  #
+  class LocalFileSystem
+    attr_accessor :root
+
+    def initialize(root, pattern = "_%s.liquid".freeze)
+      @root = root
+      @pattern = pattern
+    end
+
+    def read_template_file(template_path, context)
+      full_path = full_path(template_path)
+      raise FileSystemError, "No such template '#{template_path}'" unless File.exists?(full_path)
+
+      File.read(full_path)
+    end
+
+    def full_path(template_path)
+      raise FileSystemError, "Illegal template name '#{template_path}'" unless template_path =~ /\A[^.\/][a-zA-Z0-9_\/]+\z/
+
+      full_path = if template_path.include?('/'.freeze)
+        File.join(root, File.dirname(template_path), @pattern % File.basename(template_path))
+      else
+        File.join(root, @pattern % template_path)
+      end
+
+      raise FileSystemError, "Illegal template path '#{File.expand_path(full_path)}'" unless File.expand_path(full_path) =~ /\A#{File.expand_path(root)}/
+
+      full_path
+    end
+  end
+end

lib/liquid/i18n.rb

@@ -0,0 +1,39 @@
+require 'yaml'
+
+module Liquid
+  class I18n
+    DEFAULT_LOCALE = File.join(File.expand_path(File.dirname(__FILE__)), "locales", "en.yml")
+
+    class TranslationError < StandardError
+    end
+
+    attr_reader :path
+
+    def initialize(path = DEFAULT_LOCALE)
+      @path = path
+    end
+
+    def translate(name, vars = {})
+      interpolate(deep_fetch_translation(name), vars)
+    end
+    alias_method :t, :translate
+
+    def locale
+      @locale ||= YAML.load_file(@path)
+    end
+
+    private
+    def interpolate(name, vars)
+      name.gsub(/%\{(\w+)\}/) {
+        # raise TranslationError, "Undefined key #{$1} for interpolation in translation #{name}"  unless vars[$1.to_sym]
+        "#{vars[$1.to_sym]}"
+      }
+    end
+
+    def deep_fetch_translation(name)
+      name.split('.'.freeze).reduce(locale) do |level, cur|
+        level[cur] or raise TranslationError, "Translation for #{name} does not exist in locale #{path}"
+      end
+    end
+  end
+end

lib/liquid/interrupts.rb

@@ -0,0 +1,17 @@
+module Liquid
+
+  # An interrupt is any command that breaks processing of a block (ex: a for loop).
+  class Interrupt
+    attr_reader :message
+
+    def initialize(message=nil)
+      @message = message || "interrupt".freeze
+    end
+  end
+
+  # Interrupt that is thrown whenever a {% break %} is called.
+  class BreakInterrupt < Interrupt; end
+
+  # Interrupt that is thrown whenever a {% continue %} is called.
+  class ContinueInterrupt < Interrupt; end
+end

lib/liquid/lexer.rb

@@ -0,0 +1,51 @@
+require "strscan"
+module Liquid
+  class Lexer
+    SPECIALS = {
+      '|'.freeze => :pipe,
+      '.'.freeze => :dot,
+      ':'.freeze => :colon,
+      ','.freeze => :comma,
+      '['.freeze => :open_square,
+      ']'.freeze => :close_square,
+      '('.freeze => :open_round,
+      ')'.freeze => :close_round
+    }
+    IDENTIFIER = /[\w\-?!]+/
+    SINGLE_STRING_LITERAL = /'[^\']*'/
+    DOUBLE_STRING_LITERAL = /"[^\"]*"/
+    NUMBER_LITERAL = /-?\d+(\.\d+)?/
+    DOTDOT = /\.\./
+    COMPARISON_OPERATOR = /==|!=|<>|<=?|>=?|contains/
+
+    def initialize(input)
+      @ss = StringScanner.new(input.rstrip)
+    end
+
+    def tokenize
+      @output = []
+
+      while !@ss.eos?
+        @ss.skip(/\s*/)
+        tok = case
+        when t = @ss.scan(COMPARISON_OPERATOR) then [:comparison, t]
+        when t = @ss.scan(SINGLE_STRING_LITERAL) then [:string, t]
+        when t = @ss.scan(DOUBLE_STRING_LITERAL) then [:string, t]
+        when t = @ss.scan(NUMBER_LITERAL) then [:number, t]
+        when t = @ss.scan(IDENTIFIER) then [:id, t]
+        when t = @ss.scan(DOTDOT) then [:dotdot, t]
+        else
+          c = @ss.getch
+          if s = SPECIALS[c]
+            [s,c]
+          else
+            raise SyntaxError, "Unexpected character #{c}"
+          end
+        end
+        @output << tok
+      end
+
+      @output << [:end_of_string]
+    end
+  end
+end

lib/liquid/locales/en.yml

@@ -0,0 +1,22 @@
+---
+  errors:
+    syntax:
+      assign: "Syntax Error in 'assign' - Valid syntax: assign [var] = [source]"
+      capture: "Syntax Error in 'capture' - Valid syntax: capture [var]"
+      case: "Syntax Error in 'case' - Valid syntax: case [condition]"
+      case_invalid_when: "Syntax Error in tag 'case' - Valid when condition: {% when [condition] [or condition2...] %}"
+      case_invalid_else: "Syntax Error in tag 'case' - Valid else condition: {% else %} (no parameters) "
+      cycle: "Syntax Error in 'cycle' - Valid syntax: cycle [name :] var [, var2, var3 ...]"
+      for: "Syntax Error in 'for loop' - Valid syntax: for [item] in [collection]"
+      for_invalid_in: "For loops require an 'in' clause"
+      for_invalid_attribute: "Invalid attribute in for loop. Valid attributes are limit and offset"
+      if: "Syntax Error in tag 'if' - Valid syntax: if [expression]"
+      include: "Error in tag 'include' - Valid syntax: include '[template]' (with|for) [object|collection]"
+      unknown_tag: "Unknown tag '%{tag}'"
+      invalid_delimiter: "'end' is not a valid delimiter for %{block_name} tags. use %{block_delimiter}"
+      unexpected_else: "%{block_name} tag does not expect else tag"
+      tag_termination: "Tag '%{token}' was not properly terminated with regexp: %{tag_end}"
+      variable_termination: "Variable '%{token}' was not properly terminated with regexp: %{tag_end}"
+      tag_never_closed: "'%{block_name}' tag was never closed"
+      meta_syntax_error: "Liquid syntax error: #{e.message}"
+      table_row: "Syntax Error in 'table_row loop' - Valid syntax: table_row [item] in [collection] cols=3"

lib/liquid/module_ex.rb

@@ -0,0 +1,62 @@
+# Copyright 2007 by Domizio Demichelis
+# This library is free software. It may be used, redistributed and/or modified
+# under the same terms as Ruby itself
+#
+# This extension is used in order to expose the object of the implementing class
+# to liquid as it were a Drop. It also limits the liquid-callable methods of the instance
+# to the allowed method passed with the liquid_methods call
+# Example:
+#
+# class SomeClass
+#   liquid_methods :an_allowed_method
+#
+#   def an_allowed_method
+#     'this comes from an allowed method'
+#   end
+#   def unallowed_method
+#     'this will never be an output'
+#   end
+# end
+#
+# if you want to extend the drop to other methods you can defines more methods
+# in the class <YourClass>::LiquidDropClass
+#
+#   class SomeClass::LiquidDropClass
+#     def another_allowed_method
+#       'and this from another allowed method'
+#     end
+#   end
+# end
+#
+# usage:
+# @something = SomeClass.new
+#
+# template:
+# {{something.an_allowed_method}}{{something.unallowed_method}} {{something.another_allowed_method}}
+#
+# output:
+# 'this comes from an allowed method and this from another allowed method'
+#
+# You can also chain associations, by adding the liquid_method call in the
+# association models.
+#
+class Module
+
+  def liquid_methods(*allowed_methods)
+    drop_class = eval "class #{self.to_s}::LiquidDropClass < Liquid::Drop; self; end"
+    define_method :to_liquid do
+      drop_class.new(self)
+    end
+    drop_class.class_eval do
+      def initialize(object)
+        @object = object
+      end
+      allowed_methods.each do |sym|
+        define_method sym do
+          @object.send sym
+        end
+      end
+    end
+  end
+
+end