seperator -> separator

Add param to accept invalid input in to_integer

.gitignore

@@ -1 +1,9 @@
-*.gem
+*~
+*.gem
+*.swp
+pkg
+*.rbc
+.rvmrc
+.ruby-version
+Gemfile.lock
+.bundle

.rubocop.yml

@@ -0,0 +1,123 @@
+inherit_from: ./.rubocop_todo.yml
+
+AllCops:
+  Exclude:
+    - 'performance/shopify/*'
+    - 'pkg/**'
+
+Metrics/BlockNesting:
+  Max: 3
+  Exclude:
+    - 'lib/liquid/block_body.rb'
+
+Metrics/ModuleLength:
+  Enabled: false
+
+Metrics/ClassLength:
+  Enabled: false
+
+Lint/AssignmentInCondition:
+  Enabled: false
+
+Lint/AmbiguousOperator:
+  Enabled: false
+
+Lint/AmbiguousRegexpLiteral:
+  Enabled: false
+
+Lint/ParenthesesAsGroupedExpression:
+  Enabled: false
+
+Lint/UnusedBlockArgument:
+  Enabled: false
+
+Lint/EndAlignment:
+  AlignWith: variable
+
+Lint/UnusedMethodArgument:
+  Enabled: false
+
+Style/SingleLineBlockParams:
+  Enabled: false
+
+Style/DoubleNegation:
+  Enabled: false
+
+Style/StringLiteralsInInterpolation:
+  Enabled: false
+
+Style/AndOr:
+  Enabled: false
+
+Style/SignalException:
+  Enabled: false
+
+Style/StringLiterals:
+  Enabled: false
+
+Style/BracesAroundHashParameters:
+  Enabled: false
+
+Style/NumericLiterals:
+  Enabled: false
+
+Style/SpaceInsideBrackets:
+  Enabled: false
+
+Style/SpaceBeforeBlockBraces:
+  Enabled: false
+
+Style/Documentation:
+  Enabled: false
+
+Style/ClassAndModuleChildren:
+  Enabled: false
+
+Style/TrailingComma:
+  Enabled: false
+
+Style/IndentHash:
+  EnforcedStyle: consistent
+
+Style/FormatString:
+  Enabled: false
+
+Style/AlignParameters:
+  EnforcedStyle: with_fixed_indentation
+
+Style/MultilineOperationIndentation:
+  EnforcedStyle: indented
+
+Style/IfUnlessModifier:
+  Enabled: false
+
+Style/RaiseArgs:
+  Enabled: false
+
+Style/DeprecatedHashMethods:
+  Enabled: false
+
+Style/RegexpLiteral:
+  Enabled: false
+
+Style/SymbolLiteral:
+  Enabled: false
+
+Performance/Count:
+  Enabled: false
+
+Style/ConstantName:
+  Enabled: false
+
+Style/CaseIndentation:
+  Enabled: false
+
+Style/ClassVars:
+  Enabled: false
+
+Style/PerlBackrefs:
+  Enabled: false
+
+Style/WordArray:
+  Enabled: false
+

.rubocop_todo.yml

@@ -0,0 +1,72 @@
+# This configuration was generated by `rubocop --auto-gen-config`
+# on 2015-06-08 18:16:16 +0000 using RuboCop version 0.32.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 5
+Lint/NestedMethodDefinition:
+  Enabled: false
+
+# Offense count: 53
+Metrics/AbcSize:
+  Max: 58
+
+# Offense count: 12
+Metrics/CyclomaticComplexity:
+  Max: 15
+
+# Offense count: 553
+# Configuration parameters: AllowURI, URISchemes.
+Metrics/LineLength:
+  Max: 294
+
+# Offense count: 77
+# Configuration parameters: CountComments.
+Metrics/MethodLength:
+  Max: 46
+
+# Offense count: 6
+Metrics/PerceivedComplexity:
+  Max: 13
+
+# Offense count: 1
+Style/AccessorMethodName:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+Style/ClosingParenthesisIndentation:
+  Enabled: false
+
+# Offense count: 3
+# Configuration parameters: MinBodyLength.
+Style/GuardClause:
+  Enabled: false
+
+# Offense count: 4
+# Configuration parameters: EnforcedStyle, SupportedStyles.
+Style/MethodName:
+  Enabled: false
+
+# Offense count: 1
+Style/MultilineBlockChain:
+  Enabled: false
+
+# Offense count: 2
+# Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
+Style/Next:
+  Enabled: false
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: AllowAsExpressionSeparator.
+Style/Semicolon:
+  Enabled: false
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: MaxLineLength.
+Style/WhileUntilModifier:
+  Enabled: false

.travis.yml

@@ -0,0 +1,20 @@
+language: ruby
+
+rvm:
+  - 2.0
+  - 2.1
+  - 2.2
+  - ruby-head
+  - jruby-head
+#  - rbx-2
+
+sudo: false
+
+matrix:
+  allow_failures:
+    - rvm: jruby-head
+
+script: "bundle exec rake"
+
+notifications:
+  disable: true

CHANGELOG

@@ -1,40 +0,0 @@
-* Fixed gem install rake task
-* Improve Error encapsulation in liquid by maintaining a own set of exceptions instead of relying on ruby build ins
-
-* 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]

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

@@ -0,0 +1,14 @@
+source 'https://rubygems.org'
+
+gemspec
+gem 'stackprof', platforms: :mri_21
+
+group :test do
+  gem 'spy', '0.4.1'
+  gem 'benchmark-ips'
+  gem 'rubocop', '>=0.32.0'
+
+  platform :mri do
+    gem 'liquid-c', github: 'Shopify/liquid-c', ref: '2570693d8d03faa0df9160ec74348a7149436df3'
+  end
+end

History.md

@@ -0,0 +1,202 @@
+# Liquid Change Log
+
+## 4.0.0 / not yet released / branch "master"
+
+### Changed
+* Add compact filter (#600) [Carson Reinke]
+* Rename deprecated "has_key?" and "has_interrupt?" methods (#593) [Florian Weingarten]
+* Include template name with line numbers in render errors (574) [Dylan Thacker-Smith]
+* Add sort_natural filter (#554) [Martin Hanzel]
+* Add forloop.parentloop as a reference to the parent loop (#520) [Justin Li]
+* Block parsing moved to BlockBody class (#458) [Dylan Thacker-Smith]
+* Add concat filter to concatenate arrays (#429) [Diogo Beato]
+* Ruby 1.9 support dropped (#491) [Justin Li]
+* Liquid::Template.file_system's read_template_file method is no longer passed the context. (#441) [James Reid-Smith]
+* Remove support for `liquid_methods`
+
+### Fixed
+* Fix bug in uniq filter (#595) [Florian Weingarten]
+* Fix bug when "blank" and "empty" are used as variable names (#592) [Florian Weingarten]
+* Fix condition parse order in strict mode (#569) [Justin Li]
+* Fix naming of the "context variable" when dynamically including a template (#559) [Justin Li]
+* Gracefully accept empty strings in the date filter (#555) [Loren Hale]
+* Fix capturing into variables with a hyphen in the name (#505) [Florian Weingarten]
+* Fix case sensitivity regression in date standard filter (#499) [Kelley Reynolds]
+* Disallow filters with no variable in strict mode (#475) [Justin Li]
+* Disallow variable names in the strict parser that are not valid in the lax parser (#463) [Justin Li]
+* Fix BlockBody#warnings taking exponential time to compute (#486) [Justin Li]
+
+## 3.0.3 / 2015-05-28 / branch "3-0-stable"
+
+* Fix condition parse order in strict mode (#569) [Justin Li]
+
+## 3.0.2 / 2015-04-24
+
+* Expose VariableLookup private members (#551) [Justin Li]
+* Documentation fixes
+
+## 3.0.1 / 2015-01-23
+
+* Remove duplicate `index0` key in TableRow tag (#502) [Alfred Xing]
+
+## 3.0.0 / 2014-11-12
+
+* Removed Block#end_tag. Instead, override parse with `super` followed by your code. See #446 [Dylan Thacker-Smith]
+* Fixed condition with wrong data types (#423) [Bogdan Gusiev]
+* Add url_encode to standard filters (#421) [Derrick Reimer]
+* Add uniq to standard filters [Florian Weingarten]
+* Add exception_handler feature (#397) and #254 [Bogdan Gusiev, Florian Weingarten]
+* Optimize variable parsing to avoid repeated regex evaluation during template rendering #383 [Jason Hiltz-Laforge]
+* Optimize checking for block interrupts to reduce object allocation #380 [Jason Hiltz-Laforge]
+* Properly set context rethrow_errors on render! #349 [Thierry Joyal]
+* Fix broken rendering of variables which are equal to false (#345) [Florian Weingarten]
+* Remove ActionView template handler [Dylan Thacker-Smith]
+* Freeze lots of string literals for new Ruby 2.1 optimization (#297) [Florian Weingarten]
+* Allow newlines in tags and variables (#324) [Dylan Thacker-Smith]
+* Tag#parse is called after initialize, which now takes options instead of tokens as the 3rd argument. See #321 [Dylan Thacker-Smith]
+* Raise `Liquid::ArgumentError` instead of `::ArgumentError` when filter has wrong number of arguments #309 [Bogdan Gusiev]
+* Add a to_s default for liquid drops (#306) [Adam Doeler]
+* Add strip, lstrip, and rstrip to standard filters [Florian Weingarten]
+* Make if, for & case tags return complete and consistent nodelists (#250) [Nick Jones]
+* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith]
+* Don't call to_sym when creating conditions for security reasons (#273) [Bouke van der Bijl]
+* Fix resource counting bug with respond_to?(:length) (#263) [Florian Weingarten]
+* Allow specifying custom patterns for template filenames (#284) [Andrei Gladkyi]
+* Allow drops to optimize loading a slice of elements (#282) [Tom Burns]
+* Support for passing variables to snippets in subdirs (#271) [Joost Hietbrink]
+* Add a class cache to avoid runtime extend calls (#249) [James Tucker]
+* Remove some legacy Ruby 1.8 compatibility code (#276) [Florian Weingarten]
+* Add default filter to standard filters (#267) [Derrick Reimer]
+* Add optional strict parsing and warn parsing (#235) [Tristan Hume]
+* Add I18n syntax error translation (#241) [Simon Hørup Eskildsen, Sirupsen]
+* Make sort filter work on enumerable drops (#239) [Florian Weingarten]
+* Fix clashing method names in enumerable drops (#238) [Florian Weingarten]
+* Make map filter work on enumerable drops (#233) [Florian Weingarten]
+* Improved whitespace stripping for blank blocks, related to #216 [Florian Weingarten]
+
+## 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 (#273) [Bouke van der Bijl]
+* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith]
+
+## 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]
+* Bugfix for #114: strip_html filter supports style tags [James Allardice]
+* Bugfix for #117: 'now' support for date filter in Ruby 1.9 [Notre Dame Webgroup]
+* Bugfix for #166: truncate filter on UTF-8 strings with Ruby 1.8 [Florian Weingarten]
+* Bugfix for #204: 'raw' parsing bug [Florian Weingarten]
+* Bugfix for #150: 'for' parsing bug [Peter Schröder]
+* Bugfix for #126: Strip CRLF in strip_newline [Peter Schröder]
+* Bugfix for #174, "can't convert Fixnum into String" for "replace" [jsw0528]
+* Allow a Liquid::Drop to be passed into Template#render [Daniel Huckstep]
+* Resource limits [Florian Weingarten]
+* Add reverse filter [Jay Strybis]
+* Add utf-8 support
+* Use array instead of Hash to keep the registered filters [Tasos Stathopoulos]
+* Cache tokenized partial templates [Tom Burns]
+* Avoid warnings in Ruby 1.9.3 [Marcus Stollsteimer]
+* Better documentation for 'include' tag (closes #163) [Peter Schröder]
+* Use of BigDecimal on filters to have better precision (closes #155) [Arthur Nogueira Neves]
+
+## 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 (#273) [Bouke van der Bijl]
+* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith]
+
+## 2.5.4 / 2013-11-11
+
+* Fix "can't convert Fixnum into String" for "replace" (#173), [jsw0528]
+
+## 2.5.3 / 2013-10-09
+
+* #232, #234, #237: Fix map filter bugs [Florian Weingarten]
+
+## 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]
+
+## 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]

History.txt

@@ -1,44 +0,0 @@
-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

@@ -17,4 +17,4 @@ 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.
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Manifest.txt

@@ -1,34 +0,0 @@
-CHANGELOG
-History.txt
-MIT-LICENSE
-Manifest.txt
-README.txt
-Rakefile
-init.rb
-lib/extras/liquid_view.rb
-lib/liquid.rb
-lib/liquid/block.rb
-lib/liquid/condition.rb
-lib/liquid/context.rb
-lib/liquid/document.rb
-lib/liquid/drop.rb
-lib/liquid/errors.rb
-lib/liquid/extensions.rb
-lib/liquid/file_system.rb
-lib/liquid/htmltags.rb
-lib/liquid/module_ex.rb
-lib/liquid/standardfilters.rb
-lib/liquid/strainer.rb
-lib/liquid/tag.rb
-lib/liquid/tags/assign.rb
-lib/liquid/tags/capture.rb
-lib/liquid/tags/case.rb
-lib/liquid/tags/comment.rb
-lib/liquid/tags/cycle.rb
-lib/liquid/tags/for.rb
-lib/liquid/tags/if.rb
-lib/liquid/tags/ifchanged.rb
-lib/liquid/tags/include.rb
-lib/liquid/tags/unless.rb
-lib/liquid/template.rb
-lib/liquid/variable.rb

README.md

@@ -0,0 +1,75 @@
+[![Build Status](https://api.travis-ci.org/Shopify/liquid.svg?branch=master)](http://travis-ci.org/Shopify/liquid)
+[![Inline docs](http://inch-ci.org/github/Shopify/liquid.svg?branch=master)](http://inch-ci.org/github/Shopify/liquid)
+
+# Liquid template engine
+
+* [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.

README.txt

@@ -1,38 +0,0 @@
-= Liquid template engine
-
-Liquid is a template engine which I wrote for 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 seperate 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 should i 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 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 one
-
-== What does it look like?
-
-	<ul id="products">  
-	  {% for product in products %}
-	    <li>
-	      <h2>{{product.name}}</h2>
-	      Only {{product.price | price }}
-  
-	      {{product.description | prettyprint | paragraph }}
- 	    </li>      
-	  {% endfor %}  
-	</ul>
-
-== Howto 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. 
-
-	@template = Liquid::Template.parse("hi {{name}}") # Parses and compiles the template
-	@template.render( 'name' => 'tobi' )              # => "hi tobi" 

Rakefile

@@ -1,24 +1,95 @@
-#!/usr/bin/env ruby
-require 'rubygems'
 require 'rake'
-require 'hoe'
+require 'rake/testtask'
+$LOAD_PATH.unshift File.expand_path("../lib", __FILE__)
+require "liquid/version"
 
-PKG_VERSION = "2.0.0"
-PKG_NAME    = "liquid"
-PKG_DESC    = "A secure non evaling end user template engine with aesthetic markup."
+task default: [:rubocop, :test]
 
-Rake::TestTask.new(:test) do |t|
-  t.libs << "lib"
-  t.libs << "test"
-  t.pattern = 'test/*_test.rb'
+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
 
-Hoe.new(PKG_NAME, PKG_VERSION) do |p|
-  p.rubyforge_name = PKG_NAME
-  p.summary        = PKG_DESC
-  p.description    = PKG_DESC
-  p.author         = "Tobias Luetke"
-  p.email          = "tobi@leetsoft.com"
-  p.url            = "http://www.liquidmarkup.org"    
-end
+desc 'run test suite with warn error mode'
+task :warn_test do
+  ENV['LIQUID_PARSER_MODE'] = 'warn'
+  Rake::Task['base_test'].invoke
+end
+
+task :rubocop do
+  require 'rubocop/rake_task'
+  RuboCop::RakeTask.new
+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
+
+  if RUBY_ENGINE == 'ruby'
+    ENV['LIQUID-C'] = '1'
+
+    ENV['LIQUID_PARSER_MODE'] = 'lax'
+    Rake::Task['base_test'].reenable
+    Rake::Task['base_test'].invoke
+
+    ENV['LIQUID_PARSER_MODE'] = 'strict'
+    Rake::Task['base_test'].reenable
+    Rake::Task['base_test'].invoke
+  end
+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
+
+task :console do
+  exec 'irb -I lib -r liquid'
+end

circle.yml

@@ -0,0 +1,3 @@
+machine:
+  ruby:
+    version: ruby-2.0

example/server/example_servlet.rb

@@ -2,36 +2,43 @@ module ProductsFilter
   def price(integer)
     sprintf("$%.2d USD", integer / 100.0)
   end
-  
+
   def prettyprint(text)
-    text.gsub( /\*(.*)\*/, '<b>\1</b>' )
+    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, 'section' => 'Snowboards', 'cool_products' => true}    
+
+  def products
+    { 'products' => products_list, 'more_products' => more_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'}]
+    [{ '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
-  
-end
+
+  def more_products_list
+    [{ 'name' => 'Arbor Catalyst', 'price' => 39900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
+     { 'name' => 'Arbor Fish', 'price' => 40000, 'description' => 'the *arbor fish* is a compact pin that features an extended wheelbase and time-honored teardrop shape' }]
+  end
+
+  def description
+    "List of Products ~ This is a list of products with price and description."
+  end
+end

example/server/liquid_servlet.rb

@@ -1,5 +1,4 @@
 class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
-
   def do_GET(req, res)
     handle(:get, req, res)
   end
@@ -7,22 +6,23 @@ class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
   def do_POST(req, res)
     handle(:post, req, res)
   end
-  
+
   private
-  
+
   def handle(type, req, res)
-    @request, @response = req, res
-    
-    @request.path_info =~ /(\w+)$/
-    @action = $1 || 'index'    
-    @assigns = send(@action) if respond_to?(@action)    
+    @request = req
+    @response = 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])      
+    @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" )
+    File.read("#{__dir__}/templates/#{filename}.liquid")
   end
-end
+end

example/server/server.rb

@@ -1,12 +1,12 @@
 require 'webrick'
 require 'rexml/document'
 
-require File.dirname(__FILE__) + '/../../lib/liquid'
-require File.dirname(__FILE__) + '/liquid_servlet'
-require File.dirname(__FILE__) + '/example_servlet'
+require_relative '../../lib/liquid'
+require_relative 'liquid_servlet'
+require_relative 'example_servlet'
 
 # Setup webrick
-server = WEBrick::HTTPServer.new( :Port => ARGV[1] || 3000 )
+server = WEBrick::HTTPServer.new(Port: ARGV[1] || 3000)
 server.mount('/', Servlet)
 trap("INT"){ server.shutdown }
-server.start
+server.start

example/server/templates/index.liquid

@@ -3,4 +3,4 @@
 <p>It is {{date}}</p>
 
 
-<p>Check out the <a href="http://localhost:3000/products">Products</a> screen </p>
+<p>Check out the <a href="/products">Products</a> screen </p>

example/server/templates/products.liquid

@@ -1,45 +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">
+<!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>There are currently {{products | count}} products in the {{section}} catalog</h1>
+  <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>
+    {% assign all_products = products | concat: more_products  %}
+    <h1>{{ description | split: '~' | first }}</h1>
+
+    <h2>{{ description | split: '~' | last }}</h2>
+
+    <h2>There are currently {{all_products | count}} products in the {{section}} catalog</h2>
 
     {% if cool_products %}
-      Cool products :) 
+      Cool products :)
     {% else %}
-      Uncool products :(    
+      Uncool products :(
     {% endif %}
 
     <ul id="products">
-      
-      {% for product in products %}
+
+      {% for product in all_products %}
         <li>
           <h2>{{product.name}}</h2>
           Only {{product.price | price }}
-      
+
           {{product.description | prettyprint | paragraph }}
-          
+
           {{ 'it rocks!' | paragraph }}
-          
-        </li>      
+
+        </li>
       {% endfor %}
-      
+
     </ul>
-	
-	</body>
+
+  </body>
 </html>

init.rb

@@ -1,8 +0,0 @@
-require 'liquid'
-require 'extras/liquid_view'
-
-if defined? ActionView::Template and ActionView::Template.respond_to? :register_template_handler
-  ActionView::Template
-else
-  ActionView::Base
-end.register_template_handler(:liquid, LiquidView)

lib/extras/liquid_view.rb

@@ -1,40 +0,0 @@
-# LiquidView is a action view extension class. You can register it with rails
-# and use liquid as an template system for .liquid files
-#
-# Example
-# 
-#   ActionView::Base::register_template_handler :liquid, LiquidView
-class LiquidView
-
-  def initialize(action_view)
-    @action_view = action_view
-  end
-  
-
-  def render(template, local_assigns_for_rails_less_than_2_1_0 = nil)
-    @action_view.controller.headers["Content-Type"] ||= 'text/html; charset=utf-8'
-    assigns = @action_view.assigns.dup
-    
-    # template is a Template object in Rails >=2.1.0, a source string previously.
-    if template.respond_to? :source
-      source = template.source
-      local_assigns = template.locals
-    else
-      source = template
-      local_assigns = local_assigns_for_rails_less_than_2_1_0
-    end
-
-    if content_for_layout = @action_view.instance_variable_get("@content_for_layout")
-      assigns['content_for_layout'] = content_for_layout
-    end
-    assigns.merge!(local_assigns)
-    
-    liquid = Liquid::Template.parse(source)
-    liquid.render(assigns, :filters => [@action_view.controller.master_helper_module], :registers => {:action_view => @action_view, :controller => @action_view.controller})
-  end
-
-  def compilable?
-    false
-  end
-
-end

lib/liquid.rb

@@ -19,50 +19,58 @@
 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-$LOAD_PATH.unshift(File.dirname(__FILE__))
-
 module Liquid
   FilterSeparator             = /\|/
-  ArgumentSeparator           = ','
-  FilterArgumentSeparator     = ':'
-  VariableAttributeSeparator  = '.'
+  ArgumentSeparator           = ','.freeze
+  FilterArgumentSeparator     = ':'.freeze
+  VariableAttributeSeparator  = '.'.freeze
   TagStart                    = /\{\%/
   TagEnd                      = /\%\}/
   VariableSignature           = /\(?[\w\-\.\[\]]\)?/
-  VariableSegment             = /[\w\-]\??/
+  VariableSegment             = /[\w\-]/
   VariableStart               = /\{\{/
   VariableEnd                 = /\}\}/
   VariableIncompleteEnd       = /\}\}?/
-  QuotedString                = /"[^"]+"|'[^']+'/
-  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/
-  StrictQuotedFragment        = /"[^"]+"|'[^']+'|[^\s,\|,\:,\,]+/
-  FirstFilterArgument         = /#{FilterArgumentSeparator}(?:#{StrictQuotedFragment})/
-  OtherFilterArgument         = /#{ArgumentSeparator}(?:#{StrictQuotedFragment})/
-  SpacelessFilter             = /#{FilterSeparator}(?:#{StrictQuotedFragment})(?:#{FirstFilterArgument}(?:#{OtherFilterArgument})*)?/
-  Expression                  = /(?:#{QuotedFragment}(?:#{SpacelessFilter})*)/
-  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/
+  QuotedString                = /"[^"]*"|'[^']*'/
+  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/o
+  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/o
   AnyStartingTag              = /\{\{|\{\%/
-  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/
-  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/
-  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+/
+  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/block_body'
 require 'liquid/document'
 require 'liquid/variable'
+require 'liquid/variable_lookup'
+require 'liquid/range_lookup'
 require 'liquid/file_system'
+require 'liquid/resource_limits'
 require 'liquid/template'
-require 'liquid/htmltags'
 require 'liquid/standardfilters'
 require 'liquid/condition'
-require 'liquid/module_ex'
+require 'liquid/utils'
+require 'liquid/tokenizer'
+require 'liquid/parse_context'
 
 # Load all the tags of the standard library
 #
-Dir[File.dirname(__FILE__) + '/liquid/tags/*.rb'].each { |f| require f }
+Dir["#{__dir__}/liquid/tags/*.rb"].each { |f| require f }

lib/liquid/block.rb

@@ -1,97 +1,67 @@
 module Liquid
-  
   class Block < Tag
-
-    def parse(tokens)
-      @nodelist ||= []
-      @nodelist.clear
-
-      while token = tokens.shift 
-
-        case token
-        when /^#{TagStart}/                   
-          if token =~ /^#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}$/
-
-            # if we found the proper block delimitor 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]
-              @nodelist << tag.new($1, $2, tokens)
-            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, "Tag '#{token}' was not properly terminated with regexp: #{TagEnd.inspect} "
-          end
-        when /^#{VariableStart}/
-          @nodelist << create_variable(token)
-        when ''
-          # pass
-        else
-          @nodelist << token
-        end
-      end       
-      
-      # Make sure that its ok to end parsing in the current block. 
-      # Effectively this method will throw and exception unless the current block is 
-      # of type Document 
-      assert_missing_delimitation!
-    end                     
-    
-    def end_tag      
+    def initialize(tag_name, markup, options)
+      super
+      @blank = true
     end
 
-    def unknown_tag(tag, params, tokens)
-      case tag 
-      when 'else'
-        raise SyntaxError, "#{block_name} tag does not expect else tag"
-      when 'end'
-        raise SyntaxError, "'end' is not a valid delimiter for #{block_name} tags. use #{block_delimiter}"
-      else
-        raise SyntaxError, "Unknown tag '#{tag}'"
+    def parse(tokens)
+      @body = BlockBody.new
+      while parse_body(@body, tokens)
       end
     end
 
-    def block_delimiter
-      "end#{block_name}"
-    end                           
+    def render(context)
+      @body.render(context)
+    end
+
+    def blank?
+      @blank
+    end
+
+    def nodelist
+      @body.nodelist
+    end
+
+    def unknown_tag(tag, _params, _tokens)
+      case tag
+      when 'else'.freeze
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unexpected_else".freeze,
+          block_name: block_name))
+      when 'end'.freeze
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.invalid_delimiter".freeze,
+          block_name: block_name,
+          block_delimiter: block_delimiter))
+      else
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unknown_tag".freeze, tag: tag))
+      end
+    end
 
     def block_name
       @tag_name
     end
 
-    def create_variable(token)
-      token.scan(/^#{VariableStart}(.*)#{VariableEnd}$/) do |content|
-        return Variable.new(content.first)
-      end
-      raise SyntaxError.new("Variable '#{token}' was not properly terminated with regexp: #{VariableEnd.inspect} ")
+    def block_delimiter
+      @block_delimiter ||= "end#{block_name}"
     end
 
-    def render(context)
-      render_all(@nodelist, context)
-    end
-    
     protected
 
-    def assert_missing_delimitation!
-      raise SyntaxError.new("#{block_name} tag was never closed")
-    end
+    def parse_body(body, tokens)
+      body.parse(tokens, parse_context) do |end_tag_name, end_tag_params|
+        @blank &&= body.blank?
 
-    def render_all(list, context)
-      list.collect do |token|
-        begin        
-          token.respond_to?(:render) ? token.render(context) : token
-        rescue Exception => e          
-          context.handle_error(e)
-        end          
-      end      
+        return false if end_tag_name == block_delimiter
+        unless end_tag_name
+          raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_never_closed".freeze, block_name: block_name))
+        end
+
+        # this tag is not registered with the system
+        # pass it to the current block for special handling or error reporting
+        unknown_tag(end_tag_name, end_tag_params, tokens)
+      end
+
+      true
     end
-  end  
-end
+  end
+end

lib/liquid/block_body.rb

@@ -0,0 +1,120 @@
+module Liquid
+  class BlockBody
+    FullToken = /\A#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
+    ContentOfVariable = /\A#{VariableStart}(.*)#{VariableEnd}\z/om
+    TAGSTART = "{%".freeze
+    VARSTART = "{{".freeze
+
+    attr_reader :nodelist
+
+    def initialize
+      @nodelist = []
+      @blank = true
+    end
+
+    def parse(tokenizer, parse_context)
+      parse_context.line_number = tokenizer.line_number
+      while token = tokenizer.shift
+        unless token.empty?
+          case
+          when token.start_with?(TAGSTART)
+            if token =~ FullToken
+              tag_name = $1
+              markup = $2
+              # fetch the tag from registered blocks
+              if tag = registered_tags[tag_name]
+                new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
+                @blank &&= new_tag.blank?
+                @nodelist << new_tag
+              else
+                # end parsing if we reach an unknown tag and let the caller decide
+                # determine how to proceed
+                return yield tag_name, markup
+              end
+            else
+              raise_missing_tag_terminator(token, parse_context)
+            end
+          when token.start_with?(VARSTART)
+            @nodelist << create_variable(token, parse_context)
+            @blank = false
+          else
+            @nodelist << token
+            @blank &&= !!(token =~ /\A\s*\z/)
+          end
+        end
+        parse_context.line_number = tokenizer.line_number
+      end
+
+      yield nil, nil
+    end
+
+    def blank?
+      @blank
+    end
+
+    def render(context)
+      output = []
+      context.resource_limits.render_score += @nodelist.length
+
+      @nodelist.each do |token|
+        # Break out if we have any unhanded interrupts.
+        break if context.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) || token.is_a?(Break)
+            context.push_interrupt(token.interrupt)
+            break
+          end
+
+          node_output = render_node(token, context)
+
+          unless token.is_a?(Block) && token.blank?
+            output << node_output
+          end
+        rescue MemoryError => e
+          raise e
+        rescue ::StandardError => e
+          output << context.handle_error(e, token.line_number)
+        end
+      end
+
+      output.join
+    end
+
+    private
+
+    def render_node(node, context)
+      node_output = (node.respond_to?(:render) ? node.render(context) : node)
+      node_output = node_output.is_a?(Array) ? node_output.join : node_output.to_s
+
+      context.resource_limits.render_length += node_output.length
+      if context.resource_limits.reached?
+        raise MemoryError.new("Memory limits exceeded".freeze)
+      end
+      node_output
+    end
+
+    def create_variable(token, parse_context)
+      token.scan(ContentOfVariable) do |content|
+        markup = content.first
+        return Variable.new(markup, parse_context)
+      end
+      raise_missing_variable_terminator(token, parse_context)
+    end
+
+    def raise_missing_tag_terminator(token, parse_context)
+      raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_termination".freeze, token: token, tag_end: TagEnd.inspect))
+    end
+
+    def raise_missing_variable_terminator(token, parse_context)
+      raise SyntaxError.new(parse_context.locale.t("errors.syntax.variable_termination".freeze, token: token, tag_end: VariableEnd.inspect))
+    end
+
+    def registered_tags
+      Template.tags
+    end
+  end
+end

lib/liquid/condition.rb

@@ -3,121 +3,130 @@ module Liquid
   #
   # Example:
   #
-  #   c = Condition.new('1', '==', '1') 
+  #   c = Condition.new(1, '==', 1)
   #   c.evaluate #=> true
   #
   class Condition #:nodoc:
     @@operators = {
-      '==' => lambda { |cond, left, right|  cond.send(:equal_variables, left, right) },
-      '!=' => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
-      '<>' => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
-      '<'  => :<,
-      '>'  => :>,
-      '>=' => :>=,
-      '<=' => :<=,
-      'contains' => lambda { |cond, left, right| left.include?(right) },
+      '=='.freeze => ->(cond, left, right) {  cond.send(:equal_variables, left, right) },
+      '!='.freeze => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
+      '<>'.freeze => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
+      '<'.freeze  => :<,
+      '>'.freeze  => :>,
+      '>='.freeze => :>=,
+      '<='.freeze => :<=,
+      'contains'.freeze => lambda do |cond, left, right|
+        if left && right && left.respond_to?(:include?)
+          right = right.to_s if left.is_a?(String)
+          left.include?(right)
+        else
+          false
+        end
+      end
     }
-    
+
     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
+      @left = left
+      @operator = operator
+      @right = right
       @child_relation  = nil
       @child_condition = nil
     end
-    
+
     def evaluate(context = Context.new)
-      result = interpret_condition(left, right, operator, context)        
-      
+      result = interpret_condition(left, right, operator, context)
+
       case @child_relation
-      when :or 
+      when :or
         result || @child_condition.evaluate(context)
-      when :and 
+      when :and
         result && @child_condition.evaluate(context)
       else
         result
-      end      
-    end                    
-    
+      end
+    end
+
     def or(condition)
-      @child_relation, @child_condition = :or, condition
+      @child_relation = :or
+      @child_condition = condition
     end
 
     def and(condition)
-      @child_relation, @child_condition = :and, condition
+      @child_relation = :and
+      @child_condition = condition
     end
-  
+
     def attach(attachment)
       @attachment = attachment
     end
-  
+
     def else?
       false
-    end                          
-    
-    def inspect
-      "#<Condition #{[@left, @operator, @right].compact.join(' ')}>"
     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) 
+      if left.is_a?(Liquid::Expression::MethodLiteral)
+        if right.respond_to?(left.method_name)
+          return right.send(left.method_name)
         else
           return nil
         end
       end
 
-      if right.is_a?(Symbol)
-        if left.respond_to?(right)
-          return left.send(right.to_s) 
+      if right.is_a?(Liquid::Expression::MethodLiteral)
+        if left.respond_to?(right.method_name)
+          return left.send(right.method_name)
         else
           return nil
         end
       end
 
-      left == right      
-    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 
+      # 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      
+      return context.evaluate(left) if op.nil?
 
-      left, right = context[left], context[right]
-            
+      left = context.evaluate(left)
+      right = context.evaluate(right)
 
-      operation = self.class.operators[op] || raise(ArgumentError.new("Unknown operator #{op}"))
+      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)        
-        left.send(operation, right)
-      else
-        nil
+      elsif left.respond_to?(operation) && right.respond_to?(operation)
+        begin
+          left.send(operation, right)
+        rescue ::ArgumentError => e
+          raise Liquid::ArgumentError.new(e.message)
+        end
       end
-    end    
-  end           
-
-
-  class ElseCondition < Condition
-      
-    def else? 
-      true
-    end
-  
-    def evaluate(context)
-      true
     end
   end
 
-end
+  class ElseCondition < Condition
+    def else?
+      true
+    end
+
+    def evaluate(_context)
+      true
+    end
+  end
+end

lib/liquid/context.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Context keeps the variable stack and resolves variables, as well as keywords
   #
   #   context['variable'] = 'testing'
@@ -13,220 +12,212 @@ module Liquid
   #
   #   context['bob']  #=> nil  class Context
   class Context
-    attr_reader :scopes
-    attr_reader :errors, :registers
+    attr_reader :scopes, :errors, :registers, :environments, :resource_limits
+    attr_accessor :exception_handler, :template_name, :partial
 
-    def initialize(assigns = {}, registers = {}, rethrow_errors = false)
-      @scopes     = [(assigns || {})]
-      @registers  = registers
-      @errors     = []
-      @rethrow_errors = rethrow_errors
+    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil)
+      @environments     = [environments].flatten
+      @scopes           = [(outer_scope || {})]
+      @registers        = registers
+      @errors           = []
+      @partial          = false
+      @resource_limits  = resource_limits || ResourceLimits.new(Template.default_resource_limits)
+      squash_instance_assigns_with_environments
+
+      @this_stack_used = false
+
+      if rethrow_errors
+        self.exception_handler = ->(e) { raise }
+      end
+
+      @interrupts = []
+      @filters = []
+    end
+
+    def warnings
+      @warnings ||= []
     end
 
     def strainer
-      @strainer ||= Strainer.create(self)
+      @strainer ||= Strainer.create(self, @filters)
     end
 
-    # adds filters to this context.
-    # this does not register the filters with the main Template object. see <tt>Template.register_filter</tt>
+    # 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.extend(f)
-      end
+      @filters += filters
+      @strainer = nil
     end
 
-    def handle_error(e)
+    # are there any not handled interrupts?
+    def 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, line_number = nil)
+      if e.is_a?(Liquid::Error)
+        e.template_name ||= template_name
+        e.line_number ||= line_number
+      end
+
+      output = nil
+
+      if exception_handler
+        result = exception_handler.call(e)
+        case result
+        when Exception
+          e = result
+          if e.is_a?(Liquid::Error)
+            e.template_name ||= template_name
+            e.line_number ||= line_number
+          end
+        when String
+          output = result
+        else
+          raise if result
+        end
+      end
       errors.push(e)
-      raise if @rethrow_errors
-
-      case e
-      when SyntaxError
-        "Liquid syntax error: #{e.message}"
-      else
-        "Liquid error: #{e.message}"
-      end
+      output || Liquid::Error.render(e)
     end
 
-
     def invoke(method, *args)
-      if strainer.respond_to?(method)
-        strainer.__send__(method, *args)
-      else
-        args.first
-      end
+      strainer.invoke(method, *args).to_liquid
     end
 
-    # push new local scope on the stack. use <tt>Context#stack</tt> instead
-    def push
-      raise StackLevelError, "Nesting too deep" if @scopes.length > 100
-      @scopes.unshift({})
+    # 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
+    # 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
+    # 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
+    # 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(&block)
-      result = nil
-      push
-      begin
-        result = yield
-      ensure
-        pop
+    #   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
-      result
+
+      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
 
-    def [](key)
-      resolve(key)
-    end
-
-    def has_key?(key)
-      resolve(key) != nil
-    end
-
-    private
-
     # 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
+    # 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 resolve(key)
-      case key
-      when nil, 'nil', 'null', ''
-        nil
-      when 'true'
-        true
-      when 'false'
-        false
-      when 'blank'
-        :blank?
-      when 'empty'
-        :empty?
-      # filtered variables
-      when SpacelessFilter
-        filtered_variable(key)
-      # Single quoted strings
-      when /^'(.*)'$/
-        $1.to_s
-      # Double quoted strings
-      when /^"(.*)"$/
-        $1.to_s
-      # Integer and floats
-      when /^(\d+)$/
-        $1.to_i
-      # Ranges
-      when /^\((\S+)\.\.(\S+)\)$/
-        (resolve($1).to_i..resolve($2).to_i)
-      # Floats
-      when /^(\d[\d\.]+)$/
-        $1.to_f
-      else
-        variable(key)
-      end
+    def [](expression)
+      evaluate(Expression.parse(expression))
     end
 
-    # fetches an object starting at the local scope and then moving up
-    # the hierachy
+    def 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)
-      @scopes.each do |scope|
-        if scope.has_key?(key)
-          variable = scope[key]
-          variable = scope[key] = variable.call(self) if variable.is_a?(Proc)
-          variable = variable.to_liquid
-          variable.context = self if variable.respond_to?(:context=)
-          return variable
-        end
-      end
-      nil
-    end
+      # 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.key?(key) }
+      scope = @scopes[index] if index
 
-    # resolves namespaced queries gracefully.
-    #
-    # Example
-    #
-    #  @context['hash'] = {"name" => 'tobi'}
-    #  assert_equal 'tobi', @context['hash.name']
-    #  assert_equal 'tobi', @context['hash["name"]']
-    #
-    def variable(markup)
-      parts = markup.scan(VariableParser)
-      square_bracketed = /^\[(.*)\]$/
+      variable = nil
 
-      first_part = parts.shift
-      if first_part =~ square_bracketed
-        first_part = resolve($1)
-      end
-
-      if object = find_variable(first_part)
-
-        parts.each do |part|
-          part = resolve($1) if part_resolved = (part =~ square_bracketed)
-
-          # If object is a hash- or array-like object we look for the
-          # presence of the key and if its available we return it
-          if object.respond_to?(:[]) and
-            ((object.respond_to?(:has_key?) and object.has_key?(part)) or
-             (object.respond_to?(:fetch) and part.is_a?(Integer)))
-
-            # if its a proc we will replace the entry with the proc
-            res = object[part]
-            res = object[part] = res.call(self) if res.is_a?(Proc) and object.respond_to?(:[]=)
-            object = res.to_liquid
-
-          # Some special cases. If the part wasn't in square brackets and
-          # no key with the same name was found we interpret following calls
-          # as commands and call them on the current object
-          elsif !part_resolved and object.respond_to?(part) and ['size', 'first', 'last'].include?(part)
-
-            object = object.send(part.intern).to_liquid
-
-          # No key was present with the desired value and it wasn't one of the directly supported
-          # keywords either. The only thing we got left is to return nil
-          else
-            return nil
+      if scope.nil?
+        @environments.each do |e|
+          variable = lookup_and_evaluate(e, key)
+          unless variable.nil?
+            scope = e
+            break
           end
-
-          # If we are dealing with a drop here we have to
-          object.context = self if object.respond_to?(:context=)
         end
       end
 
-      object
+      scope ||= @environments.last || @scopes.last
+      variable ||= lookup_and_evaluate(scope, key)
+
+      variable = variable.to_liquid
+      variable.context = self if variable.respond_to?(:context=)
+
+      variable
     end
-    
-    def filtered_variable(markup)
-      Variable.new(markup).render(self)
+
+    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
-  end
-end
+
+    private
+
+    def squash_instance_assigns_with_environments
+      @scopes.last.each_key do |k|
+        @environments.each do |env|
+          if env.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

@@ -1,17 +1,27 @@
 module Liquid
-  class Document < Block                                                             
-    # we don't need markup to open this block
-    def initialize(tokens)
-      parse(tokens)
-    end                                                                        
-  
-    # There isn't a real delimter   
-    def block_delimiter
-      []
+  class Document < BlockBody
+    def self.parse(tokens, parse_context)
+      doc = new
+      doc.parse(tokens, parse_context)
+      doc
+    end
+
+    def parse(tokens, parse_context)
+      super do |end_tag_name, end_tag_params|
+        unknown_tag(end_tag_name, parse_context) if end_tag_name
+      end
+    rescue SyntaxError => e
+      e.line_number ||= parse_context.line_number
+      raise
+    end
+
+    def unknown_tag(tag, parse_context)
+      case tag
+      when 'else'.freeze, 'end'.freeze
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unexpected_outer_tag".freeze, tag: tag))
+      else
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.unknown_tag".freeze, tag: tag))
+      end
     end
-  
-    # Document blocks don't need to be terminated since they are not actually opened
-    def assert_missing_delimitation!
-    end    
   end
-end
+end

lib/liquid/drop.rb

@@ -1,50 +1,78 @@
+require 'set'
+
 module Liquid
-  
-  # A drop in liquid is a class which allows you to to export DOM like things to liquid
-  # Methods of drops are callable. 
-  # The main use for liquid drops is the 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
+  # 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 )
+  #   class ProductDrop < Liquid::Drop
+  #     def top_sales
+  #       Shop.current.products.find(:all, :order => 'sales', :limit => 10 )
+  #     end
   #   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
+  #   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
 
-    # Catch all for the method 
-    def before_method(method)
+    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)          
-      if self.class.public_instance_methods.include?(method.to_s)
-        send(method.to_sym) 
-      else        
-        before_method(method)
+    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)
+
+    def key?(_name)
       true
     end
-    
+
+    def inspect
+      self.class.to_s
+    end
+
     def to_liquid
       self
     end
 
-    alias :[] :invoke_drop
+    def to_s
+      self.class.name
+    end
+
+    alias_method :[], :invoke_drop
+
+    # Check for method existence without invoking respond_to?, which creates symbols
+    def self.invokable?(method_name)
+      invokable_methods.include?(method_name.to_s)
+    end
+
+    def self.invokable_methods
+      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
+    end
   end
-  
 end

lib/liquid/errors.rb

@@ -1,11 +1,59 @@
 module Liquid
-  class Error < ::StandardError; 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
-end
+  class Error < ::StandardError
+    attr_accessor :line_number
+    attr_accessor :template_name
+    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 self.render(e)
+      if e.is_a?(Liquid::Error)
+        e.to_s
+      else
+        "Liquid error: #{e}"
+      end
+    end
+
+    private
+
+    def message_prefix
+      str = ""
+      if is_a?(SyntaxError)
+        str << "Liquid syntax error"
+      else
+        str << "Liquid error"
+      end
+
+      if line_number
+        str << " ("
+        str << template_name << " " if template_name
+        str << "line " << line_number.to_s << ")"
+      end
+
+      str << ": "
+      str
+    end
+  end
+
+  ArgumentError = Class.new(Error)
+  ContextError = Class.new(Error)
+  FileSystemError = Class.new(Error)
+  StandardError = Class.new(Error)
+  SyntaxError = Class.new(Error)
+  StackLevelError = Class.new(Error)
+  TaintedError = Class.new(Error)
+  MemoryError = Class.new(Error)
+  ZeroDivisionError = Class.new(Error)
+  FloatDomainError = Class.new(Error)
+end

lib/liquid/expression.rb

@@ -0,0 +1,45 @@
+module Liquid
+  class Expression
+    class MethodLiteral
+      attr_reader :method_name, :to_s
+
+      def initialize(method_name, to_s)
+        @method_name = method_name
+        @to_s = to_s
+      end
+
+      def to_liquid
+        to_s
+      end
+    end
+
+    LITERALS = {
+      nil => nil, 'nil'.freeze => nil, 'null'.freeze => nil, ''.freeze => nil,
+      'true'.freeze  => true,
+      'false'.freeze => false,
+      'blank'.freeze => MethodLiteral.new(:blank?, '').freeze,
+      'empty'.freeze => MethodLiteral.new(:empty?, '').freeze
+    }
+
+    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

@@ -43,14 +43,20 @@ class Date  # :nodoc:
   end
 end
 
-def true.to_liquid  # :nodoc:
-  self
+class TrueClass
+  def to_liquid  # :nodoc:
+    self
+  end
 end
 
-def false.to_liquid # :nodoc:
-  self
+class FalseClass
+  def to_liquid # :nodoc:
+    self
+  end
 end
 
-def nil.to_liquid # :nodoc:
-  self
-end
+class NilClass
+  def to_liquid # :nodoc:
+    self
+  end
+end

lib/liquid/file_system.rb

@@ -1,7 +1,7 @@
 module Liquid
-  # A Liquid file system is way to let your templates retrieve other templates for use with the include tag.
+  # 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 
+  # 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.
@@ -14,11 +14,11 @@ module Liquid
   # 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)
+    def read_template_file(_template_path)
       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.
   #
@@ -27,36 +27,47 @@ module Liquid
   # 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)
+
+    def initialize(root, pattern = "_%s.liquid".freeze)
       @root = root
+      @pattern = pattern
     end
-    
+
     def read_template_file(template_path)
       full_path = full_path(template_path)
-      raise FileSystemError, "No such template '#{template_path}'" unless File.exists?(full_path)
-      
+      raise FileSystemError, "No such template '#{template_path}'" unless File.exist?(full_path)
+
       File.read(full_path)
     end
-    
+
     def full_path(template_path)
-      raise FileSystemError, "Illegal template name '#{template_path}'" unless template_path =~ /^[^.\/][a-zA-Z0-9_\/]+$/
-      
-      full_path = if template_path.include?('/')
-        File.join(root, File.dirname(template_path), "_#{File.basename(template_path)}.liquid")
+      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, "_#{template_path}.liquid")
+        File.join(root, @pattern % template_path)
       end
-      
-      raise FileSystemError, "Illegal template path '#{File.expand_path(full_path)}'" unless File.expand_path(full_path) =~ /^#{File.expand_path(root)}/
-      
+
+      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
+end

lib/liquid/htmltags.rb

@@ -1,74 +0,0 @@
-module Liquid
-  class TableRow < Block                                             
-    Syntax = /(\w+)\s+in\s+(#{VariableSignature}+)/   
-    
-    def initialize(tag_name, markup, tokens)
-      if markup =~ Syntax
-        @variable_name = $1
-        @collection_name = $2
-        @attributes = {}
-        markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = value
-        end
-      else
-        raise SyntaxError.new("Syntax Error in 'table_row loop' - Valid syntax: table_row [item] in [collection] cols=3")
-      end
-      
-      super      
-    end
-    
-    def render(context)        
-      collection = context[@collection_name] or return ''
-      
-      if @attributes['limit'] or @attributes['offset']
-        limit = context[@attributes['limit']] || -1
-        offset = context[@attributes['offset']] || 0
-        collection = collection[offset.to_i..(limit.to_i + offset.to_i - 1)]
-      end
-            
-      length = collection.length
-      
-      cols = context[@attributes['cols']].to_i
-
-      row = 1
-      col = 0
-
-      result = ["<tr class=\"row1\">\n"]
-      context.stack do 
-
-        collection.each_with_index do |item, index|
-          context[@variable_name] = item
-          context['tablerowloop'] = {
-            'length'  => length,
-            'index'   => index + 1, 
-            'index0'  => index, 
-            'col'     => col + 1, 
-            'col0'    => col, 
-            'index0'  => index, 
-            'rindex'  => length - index,
-            'rindex0' => length - index -1,
-            'first'   => (index == 0),
-            'last'    => (index == length - 1),
-            'col_first' => (col == 0),
-            'col_last'  => (col == cols - 1)
-          }  
-          
-            
-          col += 1
-                                
-          result << ["<td class=\"col#{col}\">"] + render_all(@nodelist, context) + ['</td>']
-
-          if col == cols and not (index == length - 1)                        
-            col  = 0
-            row += 1
-            result << ["</tr>\n<tr class=\"row#{row}\">"] 
-          end
-          
-        end
-      end
-      result + ["</tr>\n"]
-    end    
-  end
-  
-  Template.register_tag('tablerow', TableRow)  
-end

lib/liquid/i18n.rb

@@ -0,0 +1,39 @@
+require 'yaml'
+
+module Liquid
+  class I18n
+    DEFAULT_LOCALE = File.join(File.expand_path(__dir__), "locales", "en.yml")
+
+    TranslationError = Class.new(StandardError)
+
+    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+)\}/) do
+        # raise TranslationError, "Undefined key #{$1} for interpolation in translation #{name}"  unless vars[$1.to_sym]
+        "#{vars[$1.to_sym]}"
+      end
+    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 +1,16 @@
+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 +1,53 @@
+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,
+      '?'.freeze => :question,
+      '-'.freeze => :dash
+    }
+    IDENTIFIER = /[a-zA-Z_][\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 = []
+
+      until @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 +1,24 @@
+---
+  errors:
+    syntax:
+      tag_unexpected_args: "Syntax Error in '%{tag}' - Valid syntax: %{tag}"
+      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"
+      unexpected_outer_tag: "Unexpected outer '%{tag}' 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

@@ -1,62 +0,0 @@
-# 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 usesd 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

lib/liquid/parse_context.rb

@@ -0,0 +1,37 @@
+module Liquid
+  class ParseContext
+    attr_accessor :partial, :locale, :line_number
+    attr_reader :warnings, :error_mode
+
+    def initialize(options = {})
+      @template_options = options ? options.dup : {}
+      @locale = @template_options[:locale] ||= I18n.new
+      @warnings = []
+      self.partial = false
+    end
+
+    def [](option_key)
+      @options[option_key]
+    end
+
+    def partial=(value)
+      @partial = value
+      @options = value ? partial_options : @template_options
+      @error_mode = @options[:error_mode] || Template.error_mode
+      value
+    end
+
+    def partial_options
+      @partial_options ||= begin
+        dont_pass = @template_options[:include_options_blacklist]
+        if dont_pass == true
+          { locale: locale }
+        elsif dont_pass.is_a?(Array)
+          @template_options.reject { |k, v| dont_pass.include?(k) }
+        else
+          @template_options
+        end
+      end
+    end
+  end
+end

lib/liquid/parser.rb

@@ -0,0 +1,90 @@
+module Liquid
+  class Parser
+    def initialize(input)
+      l = Lexer.new(input)
+      @tokens = l.tokenize
+      @p = 0 # pointer to current location
+    end
+
+    def jump(point)
+      @p = point
+    end
+
+    def consume(type = nil)
+      token = @tokens[@p]
+      if type && token[0] != type
+        raise SyntaxError, "Expected #{type} but found #{@tokens[@p].first}"
+      end
+      @p += 1
+      token[1]
+    end
+
+    # Only consumes the token if it matches the type
+    # Returns the token's contents if it was consumed
+    # or false otherwise.
+    def consume?(type)
+      token = @tokens[@p]
+      return false unless token && token[0] == type
+      @p += 1
+      token[1]
+    end
+
+    # Like consume? Except for an :id token of a certain name
+    def id?(str)
+      token = @tokens[@p]
+      return false unless token && token[0] == :id
+      return false unless token[1] == str
+      @p += 1
+      token[1]
+    end
+
+    def look(type, ahead = 0)
+      tok = @tokens[@p + ahead]
+      return false unless tok
+      tok[0] == type
+    end
+
+    def expression
+      token = @tokens[@p]
+      if token[0] == :id
+        variable_signature
+      elsif [:string, :number].include? token[0]
+        consume
+      elsif token.first == :open_round
+        consume
+        first = expression
+        consume(:dotdot)
+        last = expression
+        consume(:close_round)
+        "(#{first}..#{last})"
+      else
+        raise SyntaxError, "#{token} is not a valid expression"
+      end
+    end
+
+    def argument
+      str = ""
+      # might be a keyword argument (identifier: expression)
+      if look(:id) && look(:colon, 1)
+        str << consume << consume << ' '.freeze
+      end
+
+      str << expression
+      str
+    end
+
+    def variable_signature
+      str = consume(:id)
+      if look(:open_square)
+        str << consume
+        str << expression
+        str << consume(:close_square)
+      end
+      if look(:dot)
+        str << consume
+        str << variable_signature
+      end
+      str
+    end
+  end
+end

lib/liquid/parser_switching.rb

@@ -0,0 +1,31 @@
+module Liquid
+  module ParserSwitching
+    def parse_with_selected_parser(markup)
+      case parse_context.error_mode
+      when :strict then strict_parse_with_error_context(markup)
+      when :lax, :lax_warn then lax_parse(markup)
+      when :warn
+        begin
+          return strict_parse_with_error_context(markup)
+        rescue SyntaxError => e
+          parse_context.warnings << e
+          return lax_parse(markup)
+        end
+      end
+    end
+
+    private
+
+    def strict_parse_with_error_context(markup)
+      strict_parse(markup)
+    rescue SyntaxError => e
+      e.line_number = line_number
+      e.markup_context = markup_context(markup)
+      raise e
+    end
+
+    def markup_context(markup)
+      "in \"#{markup.strip}\""
+    end
+  end
+end

lib/liquid/profiler.rb

@@ -0,0 +1,158 @@
+require 'liquid/profiler/hooks'
+
+module Liquid
+  # Profiler enables support for profiling template rendering to help track down performance issues.
+  #
+  # To enable profiling, first require 'liquid/profiler'.
+  # Then, to profile a parse/render cycle, pass the <tt>profile: true</tt> option to <tt>Liquid::Template.parse</tt>.
+  # After <tt>Liquid::Template#render</tt> is called, the template object makes available an instance of this
+  # class via the <tt>Liquid::Template#profiler</tt> method.
+  #
+  #   template = Liquid::Template.parse(template_content, profile: true)
+  #   output  = template.render
+  #   profile = template.profiler
+  #
+  # This object contains all profiling information, containing information on what tags were rendered,
+  # where in the templates these tags live, and how long each tag took to render.
+  #
+  # This is a tree structure that is Enumerable all the way down, and keeps track of tags and rendering times
+  # inside of <tt>{% include %}</tt> tags.
+  #
+  #   profile.each do |node|
+  #     # Access to the node itself
+  #     node.code
+  #
+  #     # Which template and line number of this node.
+  #     # If top level, this will be "<root>".
+  #     node.partial
+  #     node.line_number
+  #
+  #     # Render time in seconds of this node
+  #     node.render_time
+  #
+  #     # If the template used {% include %}, this node will also have children.
+  #     node.children.each do |child2|
+  #       # ...
+  #     end
+  #   end
+  #
+  # Profiler also exposes the total time of the template's render in <tt>Liquid::Profiler#total_render_time</tt>.
+  #
+  # All render times are in seconds. There is a small performance hit when profiling is enabled.
+  #
+  class Profiler
+    include Enumerable
+
+    class Timing
+      attr_reader :code, :partial, :line_number, :children
+
+      def initialize(node, partial)
+        @code        = node.respond_to?(:raw) ? node.raw : node
+        @partial     = partial
+        @line_number = node.respond_to?(:line_number) ? node.line_number : nil
+        @children    = []
+      end
+
+      def self.start(node, partial)
+        new(node, partial).tap(&:start)
+      end
+
+      def start
+        @start_time = Time.now
+      end
+
+      def finish
+        @end_time = Time.now
+      end
+
+      def render_time
+        @end_time - @start_time
+      end
+    end
+
+    def self.profile_node_render(node)
+      if Profiler.current_profile && node.respond_to?(:render)
+        Profiler.current_profile.start_node(node)
+        output = yield
+        Profiler.current_profile.end_node(node)
+        output
+      else
+        yield
+      end
+    end
+
+    def self.profile_children(template_name)
+      if Profiler.current_profile
+        Profiler.current_profile.push_partial(template_name)
+        output = yield
+        Profiler.current_profile.pop_partial
+        output
+      else
+        yield
+      end
+    end
+
+    def self.current_profile
+      Thread.current[:liquid_profiler]
+    end
+
+    def initialize
+      @partial_stack = ["<root>"]
+
+      @root_timing = Timing.new("", current_partial)
+      @timing_stack = [@root_timing]
+
+      @render_start_at = Time.now
+      @render_end_at = @render_start_at
+    end
+
+    def start
+      Thread.current[:liquid_profiler] = self
+      @render_start_at = Time.now
+    end
+
+    def stop
+      Thread.current[:liquid_profiler] = nil
+      @render_end_at = Time.now
+    end
+
+    def total_render_time
+      @render_end_at - @render_start_at
+    end
+
+    def each(&block)
+      @root_timing.children.each(&block)
+    end
+
+    def [](idx)
+      @root_timing.children[idx]
+    end
+
+    def length
+      @root_timing.children.length
+    end
+
+    def start_node(node)
+      @timing_stack.push(Timing.start(node, current_partial))
+    end
+
+    def end_node(_node)
+      timing = @timing_stack.pop
+      timing.finish
+
+      @timing_stack.last.children << timing
+    end
+
+    def current_partial
+      @partial_stack.last
+    end
+
+    def push_partial(partial_name)
+      @partial_stack.push(partial_name)
+    end
+
+    def pop_partial
+      @partial_stack.pop
+    end
+  end
+end

lib/liquid/profiler/hooks.rb

@@ -0,0 +1,23 @@
+module Liquid
+  class BlockBody
+    def render_node_with_profiling(node, context)
+      Profiler.profile_node_render(node) do
+        render_node_without_profiling(node, context)
+      end
+    end
+
+    alias_method :render_node_without_profiling, :render_node
+    alias_method :render_node, :render_node_with_profiling
+  end
+
+  class Include < Tag
+    def render_with_profiling(context)
+      Profiler.profile_children(context.evaluate(@template_name_expr).to_s) do
+        render_without_profiling(context)
+      end
+    end
+
+    alias_method :render_without_profiling, :render
+    alias_method :render, :render_with_profiling
+  end
+end

lib/liquid/range_lookup.rb

@@ -0,0 +1,37 @@
+module Liquid
+  class RangeLookup
+    def self.parse(start_markup, end_markup)
+      start_obj = Expression.parse(start_markup)
+      end_obj = Expression.parse(end_markup)
+      if start_obj.respond_to?(:evaluate) || end_obj.respond_to?(:evaluate)
+        new(start_obj, end_obj)
+      else
+        start_obj.to_i..end_obj.to_i
+      end
+    end
+
+    def initialize(start_obj, end_obj)
+      @start_obj = start_obj
+      @end_obj = end_obj
+    end
+
+    def evaluate(context)
+      start_int = to_integer(context.evaluate(@start_obj))
+      end_int = to_integer(context.evaluate(@end_obj))
+      start_int..end_int
+    end
+
+    private
+
+    def to_integer(input)
+      case input
+      when Integer
+        input
+      when NilClass, String
+        input.to_i
+      else
+        Utils.to_integer(input)
+      end
+    end
+  end
+end

lib/liquid/resource_limits.rb

@@ -0,0 +1,23 @@
+module Liquid
+  class ResourceLimits
+    attr_accessor :render_length, :render_score, :assign_score,
+      :render_length_limit, :render_score_limit, :assign_score_limit
+
+    def initialize(limits)
+      @render_length_limit = limits[:render_length_limit]
+      @render_score_limit = limits[:render_score_limit]
+      @assign_score_limit = limits[:assign_score_limit]
+      reset
+    end
+
+    def reached?
+      (@render_length_limit && @render_length > @render_length_limit) ||
+        (@render_score_limit && @render_score > @render_score_limit) ||
+        (@assign_score_limit && @assign_score > @assign_score_limit)
+    end
+
+    def reset
+      @render_length = @render_score = @assign_score = 0
+    end
+  end
+end

lib/liquid/standardfilters.rb

@@ -1,126 +1,227 @@
 require 'cgi'
+require 'bigdecimal'
 
 module Liquid
-  
   module StandardFilters
-    
+    HTML_ESCAPE = {
+      '&'.freeze => '&'.freeze,
+      '>'.freeze => '>'.freeze,
+      '<'.freeze => '&lt;'.freeze,
+      '"'.freeze => '&quot;'.freeze,
+      "'".freeze => '&#39;'.freeze
+    }
+    HTML_ESCAPE_ONCE_REGEXP = /["><']|&(?!([a-zA-Z]+|(#\d+));)/
+
     # Return the size of an array or of an string
     def size(input)
-      
       input.respond_to?(:size) ? input.size : 0
-    end         
-    
-    # convert a input string to DOWNCASE
+    end
+
+    # convert an input string to DOWNCASE
     def downcase(input)
       input.to_s.downcase
-    end         
+    end
 
-    # convert a input string to UPCASE
+    # convert an input string to UPCASE
     def upcase(input)
       input.to_s.upcase
     end
-    
+
     # capitalize words in the input centence
     def capitalize(input)
       input.to_s.capitalize
     end
-        
+
     def escape(input)
-      CGI.escapeHTML(input) rescue input
+      CGI.escapeHTML(input).untaint
     end
-    
     alias_method :h, :escape
-    
-    # Truncate a string down to x characters
-    def truncate(input, length = 50, truncate_string = "...")
-      if input.nil? then return end
-      l = length.to_i - truncate_string.length
-      l = 0 if l < 0
-      input.length > length.to_i ? input[0...l] + truncate_string : input
+
+    def escape_once(input)
+      input.to_s.gsub(HTML_ESCAPE_ONCE_REGEXP, HTML_ESCAPE)
     end
 
-    def truncatewords(input, words = 15, truncate_string = "...")
-      if input.nil? then return end
-      wordlist = input.to_s.split
-      l = words.to_i - 1
+    def url_encode(input)
+      CGI.escape(input) rescue input
+    end
+
+    def slice(input, offset, length = nil)
+      offset = Utils.to_integer(offset)
+      length = length ? Utils.to_integer(length) : 1
+
+      if input.is_a?(Array)
+        input.slice(offset, length) || []
+      else
+        input.to_s.slice(offset, length) || ''
+      end
+    end
+
+    # Truncate a string down to x characters
+    def truncate(input, length = 50, truncate_string = "...".freeze)
+      return if input.nil?
+      length = Utils.to_integer(length)
+      l = length - truncate_string.length
       l = 0 if l < 0
-      wordlist.length > l ? wordlist[0..l].join(" ") + truncate_string : input 
+      input.length > length ? input[0...l] + truncate_string : input
     end
-    
+
+    def truncatewords(input, words = 15, truncate_string = "...".freeze)
+      return if input.nil?
+      wordlist = input.to_s.split
+      words = Utils.to_integer(words)
+      l = words - 1
+      l = 0 if l < 0
+      wordlist.length > l ? wordlist[0..l].join(" ".freeze) + truncate_string : input
+    end
+
+    # Split input string into an array of substrings separated by given pattern.
+    #
+    # Example:
+    #   <div class="summary">{{ post | split '//' | first }}</div>
+    #
+    def split(input, pattern)
+      input.to_s.split(pattern)
+    end
+
+    def strip(input)
+      input.to_s.strip
+    end
+
+    def lstrip(input)
+      input.to_s.lstrip
+    end
+
+    def rstrip(input)
+      input.to_s.rstrip
+    end
+
     def strip_html(input)
-      input.to_s.gsub(/<.*?>/, '')
-    end       
-    
-    # Remove all newlines from the string
-    def strip_newlines(input)        
-      input.to_s.gsub(/\n/, '')      
+      empty = ''.freeze
+      input.to_s.gsub(/<script.*?<\/script>/m, empty).gsub(/<!--.*?-->/m, empty).gsub(/<style.*?<\/style>/m, empty).gsub(/<.*?>/m, empty)
     end
-    
-    
+
+    # Remove all newlines from the string
+    def strip_newlines(input)
+      input.to_s.gsub(/\r?\n/, ''.freeze)
+    end
+
     # Join elements of the array with certain character between them
-    def join(input, glue = ' ')
-      [input].flatten.join(glue)
+    def join(input, glue = ' '.freeze)
+      InputIterator.new(input).join(glue)
     end
 
     # Sort elements of the array
     # provide optional property with which to sort an array of hashes or drops
     def sort(input, property = nil)
-      ary = [input].flatten
+      ary = InputIterator.new(input)
       if property.nil?
         ary.sort
-      elsif ary.first.respond_to?('[]') and !ary.first[property].nil?
-        ary.sort {|a,b| a[property] <=> b[property] }
+      elsif ary.first.respond_to?(:[]) && !ary.first[property].nil?
+        ary.sort { |a, b| a[property] <=> b[property] }
       elsif ary.first.respond_to?(property)
-        ary.sort {|a,b| a.send(property) <=> b.send(property) }
+        ary.sort { |a, b| a.send(property) <=> b.send(property) }
       end
-    end               
-    
+    end
+
+    # Sort elements of an array ignoring case if strings
+    # provide optional property with which to sort an array of hashes or drops
+    def sort_natural(input, property = nil)
+      ary = InputIterator.new(input)
+
+      if property.nil?
+        ary.sort { |a, b| a.casecmp(b) }
+      elsif ary.first.respond_to?(:[]) && !ary.first[property].nil?
+        ary.sort { |a, b| a[property].casecmp(b[property]) }
+      elsif ary.first.respond_to?(property)
+        ary.sort { |a, b| a.send(property).casecmp(b.send(property)) }
+      end
+    end
+
+    # Remove duplicate elements from an array
+    # provide optional property with which to determine uniqueness
+    def uniq(input, property = nil)
+      ary = InputIterator.new(input)
+
+      if property.nil?
+        ary.uniq
+      elsif ary.first.respond_to?(:[])
+        ary.uniq{ |a| a[property] }
+      end
+    end
+
+    # Reverse the elements of an array
+    def reverse(input)
+      ary = InputIterator.new(input)
+      ary.reverse
+    end
+
     # map/collect on a given property
     def map(input, property)
-      ary = [input].flatten
-      if ary.first.respond_to?('[]') and !ary.first[property].nil?
-        ary.map {|e| e[property] }
-      elsif ary.first.respond_to?(property)
-        ary.map {|e| e.send(property) }
+      InputIterator.new(input).map do |e|
+        e = e.call if e.is_a?(Proc)
+
+        if property == "to_liquid".freeze
+          e
+        elsif e.respond_to?(:[])
+          e[property]
+        end
       end
     end
-            
-    # Replace occurrences of a string with another
-    def replace(input, string, replacement = '')
-      input.to_s.gsub(string, replacement)
+
+    # Remove nils within an array
+    # provide optional property with which to check for nil
+    def compact(input, property = nil)
+      ary = InputIterator.new(input)
+
+      if property.nil?
+        ary.compact
+      elsif ary.first.respond_to?(:[])
+        ary.reject{ |a| a[property].nil? }
+      elsif ary.first.respond_to?(property)
+        ary.reject { |a| a.send(property).nil? }
+      end
     end
-                                                 
+
+    # Replace occurrences of a string with another
+    def replace(input, string, replacement = ''.freeze)
+      input.to_s.gsub(string.to_s, replacement.to_s)
+    end
+
     # Replace the first occurrences of a string with another
-    def replace_first(input, string, replacement = '')
-      input.to_s.sub(string, replacement)
-    end              
-                                                           
+    def replace_first(input, string, replacement = ''.freeze)
+      input.to_s.sub(string.to_s, replacement.to_s)
+    end
+
     # remove a substring
     def remove(input, string)
-      input.to_s.gsub(string, '')      
+      input.to_s.gsub(string.to_s, ''.freeze)
     end
-                        
+
     # remove the first occurrences of a substring
     def remove_first(input, string)
-      input.to_s.sub(string, '')      
-    end             
-                              
+      input.to_s.sub(string.to_s, ''.freeze)
+    end
+
     # add one string to another
     def append(input, string)
       input.to_s + string.to_s
     end
-                                
+
+    def concat(input, array)
+      InputIterator.new(input).concat(array)
+    end
+
     # prepend a string to another
     def prepend(input, string)
       string.to_s + input.to_s
     end
-                                             
+
     # Add <br /> tags in front of all newlines in input string
-    def newline_to_br(input)        
-      input.to_s.gsub(/\n/, "<br />\n")      
+    def newline_to_br(input)
+      input.to_s.gsub(/\n/, "<br />\n".freeze)
     end
-    
-    # Reformat a date
+
+    # Reformat a date using Ruby's core Time#strftime( string ) -> string
     #
     #   %a - The abbreviated weekday name (``Sun'')
     #   %A - The  full  weekday  name (``Sunday'')
@@ -134,6 +235,7 @@ module Liquid
     #   %m - Month of the year (01..12)
     #   %M - Minute of the hour (00..59)
     #   %p - Meridian indicator (``AM''  or  ``PM'')
+    #   %s - Number of seconds since 1970-01-01 00:00:00 UTC.
     #   %S - Second of the minute (00..60)
     #   %U - Week  number  of the current year,
     #           starting with the first Sunday as the first
@@ -148,62 +250,137 @@ module Liquid
     #   %Y - Year with century
     #   %Z - Time zone name
     #   %% - Literal ``%'' character
+    #
+    #   See also: http://www.ruby-doc.org/core/Time.html#method-i-strftime
     def date(input, format)
-      
-      if format.to_s.empty?
-        return input.to_s
-      end
-      
-      date = input.is_a?(String) ? Time.parse(input) : input
-      
-      if date.respond_to?(:strftime)
-        date.strftime(format.to_s)
-      else
-        input
-      end
-    rescue => e 
-      input
+      return input if format.to_s.empty?
+
+      return input unless date = Utils.to_date(input)
+
+      date.strftime(format.to_s)
     end
-    
-    # Get the first element of the passed in array 
-    # 
+
+    # Get the first element of the passed in array
+    #
     # Example:
     #    {{ product.images | first | to_img }}
-    #  
+    #
     def first(array)
       array.first if array.respond_to?(:first)
     end
 
-    # Get the last element of the passed in array 
-    # 
+    # Get the last element of the passed in array
+    #
     # Example:
     #    {{ product.images | last | to_img }}
-    #  
+    #
     def last(array)
       array.last if array.respond_to?(:last)
     end
-    
+
     # addition
     def plus(input, operand)
-      input + operand if input.respond_to?('+')
+      apply_operation(input, operand, :+)
     end
-    
+
     # subtraction
     def minus(input, operand)
-      input - operand if input.respond_to?('-')
+      apply_operation(input, operand, :-)
     end
-    
+
     # multiplication
     def times(input, operand)
-      input * operand if input.respond_to?('*')
+      apply_operation(input, operand, :*)
     end
-    
+
     # division
     def divided_by(input, operand)
-      input / operand if input.respond_to?('/')
+      apply_operation(input, operand, :/)
+    rescue ::ZeroDivisionError => e
+      raise Liquid::ZeroDivisionError, e.message
+    end
+
+    def modulo(input, operand)
+      apply_operation(input, operand, :%)
+    rescue ::ZeroDivisionError => e
+      raise Liquid::ZeroDivisionError, e.message
+    end
+
+    def round(input, n = 0)
+      result = Utils.to_number(input).round(Utils.to_number(n))
+      result = result.to_f if result.is_a?(BigDecimal)
+      result = result.to_i if n == 0
+      result
+    rescue ::FloatDomainError => e
+      raise Liquid::FloatDomainError, e.message
+    end
+
+    def ceil(input)
+      Utils.to_number(input).ceil.to_i
+    rescue ::FloatDomainError => e
+      raise Liquid::FloatDomainError, e.message
+    end
+
+    def floor(input)
+      Utils.to_number(input).floor.to_i
+    rescue ::FloatDomainError => e
+      raise Liquid::FloatDomainError, e.message
+    end
+
+    def default(input, default_value = "".freeze)
+      is_blank = input.respond_to?(:empty?) ? input.empty? : !input
+      is_blank ? default_value : input
+    end
+
+    private
+
+    def apply_operation(input, operand, operation)
+      result = Utils.to_number(input).send(operation, Utils.to_number(operand))
+      result.is_a?(BigDecimal) ? result.to_f : result
+    end
+
+    class InputIterator
+      include Enumerable
+
+      def initialize(input)
+        @input = if input.is_a?(Array)
+          input.flatten
+        elsif input.is_a?(Hash)
+          [input]
+        elsif input.is_a?(Enumerable)
+          input
+        else
+          Array(input)
+        end
+      end
+
+      def join(glue)
+        to_a.join(glue)
+      end
+
+      def concat(args)
+        to_a.concat args
+      end
+
+      def reverse
+        reverse_each.to_a
+      end
+
+      def uniq(&block)
+        to_a.uniq(&block)
+      end
+
+      def compact
+        to_a.compact
+      end
+
+      def each
+        @input.each do |e|
+          yield(e.respond_to?(:to_liquid) ? e.to_liquid : e)
+        end
+      end
     end
-    
   end
-   
+
   Template.register_filter(StandardFilters)
 end

lib/liquid/strainer.rb

@@ -1,52 +1,58 @@
 require 'set'
 
 module Liquid
-  
-  
-  parent_object = if defined? BlankObject
-    BlankObject
-  else
-    Object
-  end
-
-  # Strainer is the parent class for the filters system. 
-  # New filters are mixed into the strainer class which is then instanciated for each liquid template render run. 
+  # Strainer is the parent class for the filters system.
+  # New filters are mixed into the strainer class which is then instantiated for each liquid template render run.
   #
-  # One of the strainer's responsibilities is to keep malicious method calls out 
-  class Strainer < parent_object #:nodoc:
-    INTERNAL_METHOD = /^__/ 
-    @@required_methods = Set.new([:__send__, :__id__, :respond_to?, :extend, :methods, :class])
-    
-    @@filters = {}
-    
+  # The Strainer only allows method calls defined in filters given to it via Strainer.global_filter,
+  # Context#add_filters or Template.register_filter
+  class Strainer #:nodoc:
+    @@global_strainer = Class.new(Strainer) do
+      @filter_methods = Set.new
+    end
+    @@strainer_class_cache = Hash.new do |hash, filters|
+      hash[filters] = Class.new(@@global_strainer) do
+        @filter_methods = @@global_strainer.filter_methods.dup
+        filters.each { |f| add_filter(f) }
+      end
+    end
+
     def initialize(context)
       @context = context
     end
-              
-    def self.global_filter(filter)
-      raise ArgumentError, "Passed filter is not a module" unless filter.is_a?(Module)
-      @@filters[filter.name] = filter
+
+    class << self
+      attr_reader :filter_methods
     end
-    
-    def self.create(context)
-      strainer = Strainer.new(context)
-      @@filters.each { |k,m| strainer.extend(m) }
-      strainer
-    end
-    
-    def respond_to?(method, include_private = false)
-      method_name = method.to_s
-      return false if method_name =~ INTERNAL_METHOD
-      return false if @@required_methods.include?(method_name)
-      super
-    end
-    
-    # remove all standard methods from the bucket so circumvent security 
-    # problems 
-    instance_methods.each do |m| 
-      unless @@required_methods.include?(m.to_sym) 
-        undef_method m
+
+    def self.add_filter(filter)
+      raise ArgumentError, "Expected module but got: #{f.class}" unless filter.is_a?(Module)
+      unless self.class.include?(filter)
+        send(:include, filter)
+        @filter_methods.merge(filter.public_instance_methods.map(&:to_s))
       end
-    end    
+    end
+
+    def self.global_filter(filter)
+      @@global_strainer.add_filter(filter)
+    end
+
+    def self.invokable?(method)
+      @filter_methods.include?(method.to_s)
+    end
+
+    def self.create(context, filters = [])
+      @@strainer_class_cache[filters].new(context)
+    end
+
+    def invoke(method, *args)
+      if self.class.invokable?(method)
+        send(method, *args)
+      else
+        args.first
+      end
+    rescue ::ArgumentError => e
+      raise Liquid::ArgumentError.new(e.message)
+    end
   end
 end

lib/liquid/tag.rb

@@ -1,26 +1,43 @@
 module Liquid
-  
   class Tag
-    attr_accessor :nodelist
-    
-    def initialize(tag_name, markup, tokens)
+    attr_reader :nodelist, :tag_name, :line_number, :parse_context
+    alias_method :options, :parse_context
+    include ParserSwitching
+
+    class << self
+      def parse(tag_name, markup, tokenizer, options)
+        tag = new(tag_name, markup, options)
+        tag.parse(tokenizer)
+        tag
+      end
+
+      private :new
+    end
+
+    def initialize(tag_name, markup, parse_context)
       @tag_name   = tag_name
       @markup     = markup
-      parse(tokens)
+      @parse_context = parse_context
+      @line_number = parse_context.line_number
     end
-    
-    def parse(tokens)
+
+    def parse(_tokens)
     end
-    
+
+    def raw
+      "#{@tag_name} #{@markup}"
+    end
+
     def name
       self.class.name.downcase
     end
-        
-    def render(context)
-      ''
-    end    
-  end
-   
 
+    def render(_context)
+      ''.freeze
+    end
+
+    def blank?
+      false
+    end
+  end
 end
-   

lib/liquid/tags/assign.rb

@@ -1,33 +1,39 @@
 module Liquid
-
   # Assign sets a variable in your template.
   #
   #   {% assign foo = 'monkey' %}
   #
   # You can then use the variable later in the page.
   #
-  #  {{ monkey }}
+  #  {{ foo }}
   #
   class Assign < Tag
-    Syntax = /(#{VariableSignature}+)\s*=\s*(#{Expression}+)/   
-  
-    def initialize(tag_name, markup, tokens)          
+    Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/om
+
+    def initialize(tag_name, markup, options)
+      super
       if markup =~ Syntax
         @to = $1
-        @from = $2
+        @from = Variable.new($2, options)
       else
-        raise SyntaxError.new("Syntax Error in 'assign' - Valid syntax: assign [var] = [source]")
+        raise SyntaxError.new options[:locale].t("errors.syntax.assign".freeze)
       end
-      
-      super      
     end
-  
+
     def render(context)
-       context.scopes.last[@to.to_s] = context[@from]
-       ''
-    end 
-  
-  end  
-  
-  Template.register_tag('assign', Assign)  
-end
+      val = @from.render(context)
+      context.scopes.last[@to] = val
+
+      inc = val.instance_of?(String) || val.instance_of?(Array) || val.instance_of?(Hash) ? val.length : 1
+      context.resource_limits.assign_score += inc
+
+      ''.freeze
+    end
+
+    def blank?
+      true
+    end
+  end
+
+  Template.register_tag('assign'.freeze, Assign)
+end

lib/liquid/tags/break.rb

@@ -0,0 +1,18 @@
+module Liquid
+  # Break tag to be used to break out of a for loop.
+  #
+  # == Basic Usage:
+  #    {% for item in collection %}
+  #      {% if item.condition %}
+  #        {% break %}
+  #      {% endif %}
+  #    {% endfor %}
+  #
+  class Break < Tag
+    def interrupt
+      BreakInterrupt.new
+    end
+  end
+
+  Template.register_tag('break'.freeze, Break)
+end

lib/liquid/tags/capture.rb

@@ -1,35 +1,38 @@
 module Liquid
-  
   # Capture stores the result of a block into a variable without rendering it inplace.
   #
   #   {% capture heading %}
   #     Monkeys!
   #   {% endcapture %}
   #   ...
-  #   <h1>{{ monkeys }}</h1>
+  #   <h1>{{ heading }}</h1>
   #
-  # Capture is useful for saving content for use later in your template, such as 
+  # Capture is useful for saving content for use later in your template, such as
   # in a sidebar or footer.
   #
   class Capture < Block
-    Syntax = /(\w+)/
+    Syntax = /(#{VariableSignature}+)/o
 
-    def initialize(tag_name, markup, tokens)      
+    def initialize(tag_name, markup, options)
+      super
       if markup =~ Syntax
         @to = $1
       else
-        raise SyntaxError.new("Syntax Error in 'capture' - Valid syntax: capture [var]")
+        raise SyntaxError.new(options[:locale].t("errors.syntax.capture"))
       end
-      
-      super       
     end
 
     def render(context)
       output = super
-      context[@to] = output.to_s
-      ''
+      context.scopes.last[@to] = output
+      context.resource_limits.assign_score += output.length
+      ''.freeze
     end
-  end  
-  
-  Template.register_tag('capture', Capture)
-end
+
+    def blank?
+      true
+    end
+  end
+
+  Template.register_tag('capture'.freeze, Capture)
+end

lib/liquid/tags/case.rb

@@ -1,83 +1,86 @@
 module Liquid
   class Case < Block
-    Syntax     = /(#{Expression})/
-    WhenSyntax = /(#{Expression})(?:(?:\s+or\s+|\s*\,\s*)(#{Expression}.*))?/
+    Syntax     = /(#{QuotedFragment})/o
+    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/om
 
-    def initialize(tag_name, markup, tokens)      
-      @blocks = []
-      
-      if markup =~ Syntax
-        @left = $1
-      else
-        raise SyntaxError.new("Syntax Error in tag 'case' - Valid syntax: case [condition]")
-      end
-            
+    def initialize(tag_name, markup, options)
       super
+      @blocks = []
+
+      if markup =~ Syntax
+        @left = Expression.parse($1)
+      else
+        raise SyntaxError.new(options[:locale].t("errors.syntax.case".freeze))
+      end
+    end
+
+    def parse(tokens)
+      body = BlockBody.new
+      while parse_body(body, tokens)
+        body = @blocks.last.attachment
+      end
+    end
+
+    def nodelist
+      @blocks.map(&:attachment)
     end
 
     def unknown_tag(tag, markup, tokens)
-      @nodelist = []
       case tag
-      when 'when'
+      when 'when'.freeze
         record_when_condition(markup)
-      when 'else'
+      when 'else'.freeze
         record_else_condition(markup)
       else
         super
       end
     end
 
-    def render(context)      
-      context.stack do          
+    def render(context)
+      context.stack do
         execute_else_block = true
-        
-        @blocks.inject([]) do |output, block|
-      
-          if block.else? 
-            
-            return render_all(block.attachment, context) if execute_else_block
-            
+
+        output = ''
+        @blocks.each do |block|
+          if block.else?
+            return block.attachment.render(context) if execute_else_block
           elsif block.evaluate(context)
-            
-            execute_else_block = false        
-            output += render_all(block.attachment, context)                    
-          end            
-      
-          output
+            execute_else_block = false
+            output << block.attachment.render(context)
+          end
         end
-      end          
+        output
+      end
     end
-    
+
     private
-    
-    def record_when_condition(markup)                
+
+    def record_when_condition(markup)
+      body = BlockBody.new
+
       while markup
-      	# Create a new nodelist and assign it to the new block
-      	if not markup =~ WhenSyntax
-      	  raise SyntaxError.new("Syntax Error in tag 'case' - Valid when condition: {% when [condition] [or condition2...] %} ")
-      	end
+        unless markup =~ WhenSyntax
+          raise SyntaxError.new(options[:locale].t("errors.syntax.case_invalid_when".freeze))
+        end
 
-      	markup = $2
+        markup = $2
 
-      	block = Condition.new(@left, '==', $1)        
-      	block.attach(@nodelist)
-      	@blocks.push(block)
+        block = Condition.new(@left, '=='.freeze, Expression.parse($1))
+        block.attach(body)
+        @blocks << block
       end
     end
 
-    def record_else_condition(markup)            
-
-      if not markup.strip.empty?
-        raise SyntaxError.new("Syntax Error in tag 'case' - Valid else condition: {% else %} (no parameters) ")
+    def record_else_condition(markup)
+      unless markup.strip.empty?
+        raise SyntaxError.new(options[:locale].t("errors.syntax.case_invalid_else".freeze))
       end
-         
-      block = ElseCondition.new            
-      block.attach(@nodelist)
+
+      block = ElseCondition.new
+      block.attach(BlockBody.new)
       @blocks << block
     end
-    
-        
-  end    
-  
-  Template.register_tag('case', Case)
+  end
+
+  Template.register_tag('case'.freeze, Case)
 end

lib/liquid/tags/comment.rb

@@ -1,9 +1,16 @@
 module Liquid
-  class Comment < Block                                             
-    def render(context)
-      ''
-    end    
+  class Comment < Block
+    def render(_context)
+      ''.freeze
+    end
+
+    def unknown_tag(_tag, _markup, _tokens)
+    end
+
+    def blank?
+      true
+    end
   end
-  
-  Template.register_tag('comment', Comment)  
-end
+
+  Template.register_tag('comment'.freeze, Comment)
+end

lib/liquid/tags/continue.rb

@@ -0,0 +1,18 @@
+module Liquid
+  # Continue tag to be used to break out of a for loop.
+  #
+  # == Basic Usage:
+  #    {% for item in collection %}
+  #      {% if item.condition %}
+  #        {% continue %}
+  #      {% endif %}
+  #    {% endfor %}
+  #
+  class Continue < Tag
+    def interrupt
+      ContinueInterrupt.new
+    end
+  end
+
+  Template.register_tag('continue'.freeze, Continue)
+end

lib/liquid/tags/cycle.rb

@@ -1,5 +1,4 @@
 module Liquid
-  
   # Cycle is usually used within a loop to alternate between values, like colors or DOM classes.
   #
   #   {% for item in items %}
@@ -13,47 +12,46 @@ module Liquid
   #    <div class="green"> Item five</div>
   #
   class Cycle < Tag
-    SimpleSyntax = /^#{Expression}/        
-    NamedSyntax  = /^(#{Expression})\s*\:\s*(.*)/
-  
-    def initialize(tag_name, markup, tokens)      
+    SimpleSyntax = /\A#{QuotedFragment}+/o
+    NamedSyntax  = /\A(#{QuotedFragment})\s*\:\s*(.*)/om
+
+    def initialize(tag_name, markup, options)
+      super
       case markup
       when NamedSyntax
-      	@variables = variables_from_string($2)
-      	@name = $1
+        @variables = variables_from_string($2)
+        @name = Expression.parse($1)
       when SimpleSyntax
         @variables = variables_from_string(markup)
-      	@name = "'#{@variables.to_s}'"
+        @name = @variables.to_s
       else
-        raise SyntaxError.new("Syntax Error in 'cycle' - Valid syntax: cycle [name :] var [, var2, var3 ...]")
+        raise SyntaxError.new(options[:locale].t("errors.syntax.cycle".freeze))
       end
-      super    
-    end    
-  
+    end
+
     def render(context)
       context.registers[:cycle] ||= Hash.new(0)
-    
+
       context.stack do
-        key = context[@name]	
+        key = context.evaluate(@name)
         iteration = context.registers[:cycle][key]
-        result = context[@variables[iteration]]
-        iteration += 1    
-        iteration  = 0  if iteration >= @variables.size 
+        result = context.evaluate(@variables[iteration])
+        iteration += 1
+        iteration  = 0  if iteration >= @variables.size
         context.registers[:cycle][key] = iteration
-        result 
+        result
       end
     end
-  
+
     private
-  
+
     def variables_from_string(markup)
       markup.split(',').collect do |var|
-    	  var =~ /\s*(#{Expression})\s*/
-    	  $1 ? $1 : nil
-    	end.compact
+        var =~ /\s*(#{QuotedFragment})\s*/o
+        $1 ? Expression.parse($1) : nil
+      end.compact
     end
-  
   end
-  
+
   Template.register_tag('cycle', Cycle)
-end
+end

lib/liquid/tags/decrement.rb

@@ -0,0 +1,35 @@
+module Liquid
+  # decrement is used in a place where one needs to insert a counter
+  #     into a template, and needs the counter to survive across
+  #     multiple instantiations of the template.
+  #     NOTE: decrement is a pre-decrement, --i,
+  #           while increment is post:      i++.
+  #
+  #     (To achieve the survival, the application must keep the context)
+  #
+  #     if the variable does not exist, it is created with value 0.
+
+  #   Hello: {% decrement variable %}
+  #
+  # gives you:
+  #
+  #    Hello: -1
+  #    Hello: -2
+  #    Hello: -3
+  #
+  class Decrement < Tag
+    def initialize(tag_name, markup, options)
+      super
+      @variable = markup.strip
+    end
+
+    def render(context)
+      value = context.environments.first[@variable] ||= 0
+      value -= 1
+      context.environments.first[@variable] = value
+      value.to_s
+    end
+  end
+
+  Template.register_tag('decrement'.freeze, Decrement)
+end

lib/liquid/tags/for.rb

@@ -1,6 +1,5 @@
 module Liquid
-
-  # "For" iterates over an array or collection. 
+  # "For" iterates over an array or collection.
   # Several useful variables are available to you within the loop.
   #
   # == Basic usage:
@@ -13,6 +12,8 @@ module Liquid
   #      <div {% if forloop.first %}class="first"{% endif %}>
   #        Item {{ forloop.index }}: {{ item.name }}
   #      </div>
+  #    {% else %}
+  #      There is nothing in the collection.
   #    {% endfor %}
   #
   # You can also define a limit and offset much like SQL.  Remember
@@ -20,7 +21,7 @@ module Liquid
   #
   #    {% for item in collection limit:5 offset:10 %}
   #      {{ item.name }}
-  #    {% end %}             
+  #    {% end %}
   #
   #  To reverse the for loop simply use {% for item in collection reversed %}
   #
@@ -29,7 +30,7 @@ module Liquid
   # forloop.name:: 'item-collection'
   # forloop.length:: Length of the loop
   # forloop.index:: The current item's position in the collection;
-  #                 forloop.index starts at 1. 
+  #                 forloop.index starts at 1.
   #                 This is helpful for non-programmers who start believe
   #                 the first item in an array is 1, not 0.
   # forloop.index0:: The current item's position in the collection
@@ -40,97 +41,152 @@ module Liquid
   #                   where 0 is the last item.
   # forloop.first:: Returns true if the item is the first item.
   # forloop.last:: Returns true if the item is the last item.
+  # forloop.parentloop:: Provides access to the parent loop, if present.
   #
-  class For < Block                                             
-    Syntax = /(\w+)\s+in\s+(#{Expression}+)\s*(reversed)?/   
-  
-    def initialize(tag_name, markup, tokens)
-      if markup =~ Syntax
-        @variable_name = $1
-        @collection_name = $2
-        @name = "#{$1}-#{$2}"           
-        @reversed = $3             
-        @attributes = {}
-        markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = value
-        end        
+  class For < Block
+    Syntax = /\A(#{VariableSegment}+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/o
+
+    def initialize(tag_name, markup, options)
+      super
+      parse_with_selected_parser(markup)
+      @for_block = BlockBody.new
+    end
+
+    def parse(tokens)
+      return unless parse_body(@for_block, tokens)
+      parse_body(@else_block, tokens)
+    end
+
+    def nodelist
+      @else_block ? [@for_block, @else_block] : [@for_block]
+    end
+
+    def unknown_tag(tag, markup, tokens)
+      return super unless tag == 'else'.freeze
+      @else_block = BlockBody.new
+    end
+
+    def render(context)
+      for_offsets = context.registers[:for] ||= Hash.new(0)
+      for_stack = context.registers[:for_stack] ||= []
+
+      parent_loop = for_stack.last
+      for_stack.push(nil)
+
+      collection = context.evaluate(@collection_name)
+      collection = collection.to_a if collection.is_a?(Range)
+
+      from = if @from == :continue
+        for_offsets[@name].to_i
       else
-        raise SyntaxError.new("Syntax Error in 'for loop' - Valid syntax: for [item] in [collection]")
+        context.evaluate(@from).to_i
       end
 
-      super
-    end
-  
-    def render(context)        
-      context.registers[:for] ||= Hash.new(0)
-    
-      collection = context[@collection_name]
-      collection = collection.to_a if collection.is_a?(Range)
-    
-      return '' unless collection.respond_to?(:each) 
-                                                 
-      from = if @attributes['offset'] == 'continue'
-        context.registers[:for][@name].to_i
-      else
-        context[@attributes['offset']].to_i
-      end
-        
-      limit = context[@attributes['limit']]
-      to    = limit ? limit.to_i + from : nil  
-          
-                       
-      segment = slice_collection_using_each(collection, from, to)      
-      
-      return '' if segment.empty?
-      
+      limit = context.evaluate(@limit)
+      to    = limit ? limit.to_i + from : nil
+
+      segment = Utils.slice_collection(collection, from, to)
+
+      return render_else(context) if segment.empty?
+
       segment.reverse! if @reversed
 
-      result = []
-        
-      length = segment.length            
-            
-      # Store our progress through the collection for the continue flag
-      context.registers[:for][@name] = from + segment.length
-              
-      context.stack do 
-        segment.each_with_index do |item, index|     
-          context[@variable_name] = item
-          context['forloop'] = {
-            'name'    => @name,
-            'length'  => length,
-            'index'   => index + 1, 
-            'index0'  => index, 
-            'rindex'  => length - index,
-            'rindex0' => length - index -1,
-            'first'   => (index == 0),
-            'last'    => (index == length - 1) }
+      result = ''
 
-          result << render_all(@nodelist, context)
+      length = segment.length
+
+      # Store our progress through the collection for the continue flag
+      for_offsets[@name] = from + segment.length
+
+      context.stack do
+        segment.each_with_index do |item, index|
+          context[@variable_name] = item
+          loop_vars = {
+            'name'.freeze       => @name,
+            'length'.freeze     => length,
+            'index'.freeze      => index + 1,
+            'index0'.freeze     => index,
+            'rindex'.freeze     => length - index,
+            'rindex0'.freeze    => length - index - 1,
+            'first'.freeze      => (index == 0),
+            'last'.freeze       => (index == length - 1),
+            'parentloop'.freeze => parent_loop
+          }
+
+          context['forloop'.freeze] = loop_vars
+          for_stack[-1] = loop_vars
+
+          result << @for_block.render(context)
+
+          # Handle any interrupts if they exist.
+          if context.interrupt?
+            interrupt = context.pop_interrupt
+            break if interrupt.is_a? BreakInterrupt
+            next if interrupt.is_a? ContinueInterrupt
+          end
         end
       end
-      result     
-    end          
-        
-    def slice_collection_using_each(collection, from, to)       
-      segments = []      
-      index = 0      
-      yielded = 0
-      collection.each do |item|         
-                
-        if to && to <= index
-          break
-        end
-        
-        if from <= index                               
-          segments << item
-        end                    
-                
-        index += 1
-      end    
 
-      segments
+      result
+    ensure
+      for_stack.pop
+    end
+
+    protected
+
+    def lax_parse(markup)
+      if markup =~ Syntax
+        @variable_name = $1
+        collection_name = $2
+        @reversed = !!$3
+        @name = "#{@variable_name}-#{collection_name}"
+        @collection_name = Expression.parse(collection_name)
+        markup.scan(TagAttributes) do |key, value|
+          set_attribute(key, value)
+        end
+      else
+        raise SyntaxError.new(options[:locale].t("errors.syntax.for".freeze))
+      end
+    end
+
+    def strict_parse(markup)
+      p = Parser.new(markup)
+      @variable_name = p.consume(:id)
+      raise SyntaxError.new(options[:locale].t("errors.syntax.for_invalid_in".freeze))  unless p.id?('in'.freeze)
+      collection_name = p.expression
+      @name = "#{@variable_name}-#{collection_name}"
+      @collection_name = Expression.parse(collection_name)
+      @reversed = p.id?('reversed'.freeze)
+
+      while p.look(:id) && p.look(:colon, 1)
+        unless attribute = p.id?('limit'.freeze) || p.id?('offset'.freeze)
+          raise SyntaxError.new(options[:locale].t("errors.syntax.for_invalid_attribute".freeze))
+        end
+        p.consume
+        set_attribute(attribute, p.expression)
+      end
+      p.consume(:end_of_string)
+    end
+
+    private
+
+    def set_attribute(key, expr)
+      case key
+      when 'offset'.freeze
+        @from = if expr == 'continue'.freeze
+          :continue
+        else
+          Expression.parse(expr)
+        end
+      when 'limit'.freeze
+        @limit = Expression.parse(expr)
+      end
+    end
+
+    def render_else(context)
+      @else_block ? @else_block.render(context) : ''.freeze
     end
   end
 
-  Template.register_tag('for', For)
-end
+  Template.register_tag('for'.freeze, For)
+end

lib/liquid/tags/if.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # If is the conditional block
   #
   #   {% if user.admin %}
@@ -10,70 +9,103 @@ module Liquid
   #
   #    There are {% if count < 5 %} less {% else %} more {% endif %} items than you need.
   #
-  #
   class If < Block
-    SyntaxHelp = "Syntax Error in tag 'if' - Valid syntax: if [expression]"
-    Syntax = /(#{Expression})\s*([=!<>a-z_]+)?\s*(#{Expression})?/
-    
-    def initialize(tag_name, markup, tokens)    
-    
+    Syntax = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/o
+    ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/o
+    BOOLEAN_OPERATORS = %w(and or)
+
+    def initialize(tag_name, markup, options)
+      super
       @blocks = []
-      
-      push_block('if', markup)
-      
-      super      
+      push_block('if'.freeze, markup)
     end
-    
+
+    def parse(tokens)
+      while parse_body(@blocks.last.attachment, tokens)
+      end
+    end
+
+    def nodelist
+      @blocks.map(&:attachment)
+    end
+
     def unknown_tag(tag, markup, tokens)
-      if ['elsif', 'else'].include?(tag)
+      if ['elsif'.freeze, 'else'.freeze].include?(tag)
         push_block(tag, markup)
       else
         super
       end
     end
-    
+
     def render(context)
       context.stack do
         @blocks.each do |block|
-          if block.evaluate(context)            
-            return render_all(block.attachment, context)            
+          if block.evaluate(context)
+            return block.attachment.render(context)
           end
-        end 
-        ''
+        end
+        ''.freeze
       end
     end
-    
-    private
-    
-    def push_block(tag, markup)            
-      block = if tag == 'else'
-        ElseCondition.new
-      else        
-        
-        expressions = markup.split(/\b(and|or)\b/).reverse
-        raise(SyntaxError, SyntaxHelp) unless expressions.shift =~ Syntax 
 
-        condition = Condition.new($1, $2, $3)               
-        
-        while not expressions.empty?
-          operator = expressions.shift 
-          
-          raise(SyntaxError, SyntaxHelp) unless expressions.shift.to_s =~ Syntax    
-          
-          new_condition = Condition.new($1, $2, $3)
-          new_condition.send(operator.to_sym, condition)     
-          condition = new_condition          
-        end                        
-                  
-        condition
+    private
+
+    def push_block(tag, markup)
+      block = if tag == 'else'.freeze
+        ElseCondition.new
+      else
+        parse_with_selected_parser(markup)
+      end
+
+      @blocks.push(block)
+      block.attach(BlockBody.new)
+    end
+
+    def lax_parse(markup)
+      expressions = markup.scan(ExpressionsAndOperators)
+      raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.pop =~ Syntax
+
+      condition = Condition.new(Expression.parse($1), $2, Expression.parse($3))
+
+      until expressions.empty?
+        operator = expressions.pop.to_s.strip
+
+        raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless expressions.pop.to_s =~ Syntax
+
+        new_condition = Condition.new(Expression.parse($1), $2, Expression.parse($3))
+        raise(SyntaxError.new(options[:locale].t("errors.syntax.if".freeze))) unless BOOLEAN_OPERATORS.include?(operator)
+        new_condition.send(operator, condition)
+        condition = new_condition
+      end
+
+      condition
+    end
+
+    def strict_parse(markup)
+      p = Parser.new(markup)
+      condition = parse_binary_comparison(p)
+      p.consume(:end_of_string)
+      condition
+    end
+
+    def parse_binary_comparison(p)
+      condition = parse_comparison(p)
+      if op = (p.id?('and'.freeze) || p.id?('or'.freeze))
+        condition.send(op, parse_binary_comparison(p))
+      end
+      condition
+    end
+
+    def parse_comparison(p)
+      a = Expression.parse(p.expression)
+      if op = p.consume?(:comparison)
+        b = Expression.parse(p.expression)
+        Condition.new(a, op, b)
+      else
+        Condition.new(a)
       end
-            
-      @blocks.push(block)      
-      @nodelist = block.attach(Array.new) 
     end
-    
-    
   end
 
-  Template.register_tag('if', If)
-end
+  Template.register_tag('if'.freeze, If)
+end

lib/liquid/tags/ifchanged.rb

@@ -1,20 +1,18 @@
 module Liquid
   class Ifchanged < Block
-            
     def render(context)
-      context.stack do 
-        
-        output = render_all(@nodelist, context)
-        
+      context.stack do
+        output = super
+
         if output != context.registers[:ifchanged]
           context.registers[:ifchanged] = output
           output
         else
-          ''
-        end              
+          ''.freeze
+        end
       end
     end
-  end  
-  
-  Template.register_tag('ifchanged', Ifchanged)  
-end
+  end
+
+  Template.register_tag('ifchanged'.freeze, Ifchanged)
+end

lib/liquid/tags/include.rb

@@ -1,55 +1,112 @@
 module Liquid
+  # Include allows templates to relate with other templates
+  #
+  # Simply include another template:
+  #
+  #   {% include 'product' %}
+  #
+  # Include a template with a local variable:
+  #
+  #   {% include 'product' with products[0] %}
+  #
+  # Include a template for a collection:
+  #
+  #   {% include 'product' for products %}
+  #
   class Include < Tag
-    Syntax = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?/
-  
-    def initialize(tag_name, markup, tokens)      
+    Syntax = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?/o
+
+    def initialize(tag_name, markup, options)
+      super
+
       if markup =~ Syntax
 
-        @template_name = $1        
-        @variable_name = $3
-        @attributes    = {}
+        template_name = $1
+        variable_name = $3
+
+        @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
+        @template_name_expr = Expression.parse(template_name)
+        @attributes = {}
 
         markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = value
+          @attributes[key] = Expression.parse(value)
         end
 
       else
-        raise SyntaxError.new("Error in tag 'include' - Valid syntax: include '[template]' (with|for) [object|collection]")
+        raise SyntaxError.new(options[:locale].t("errors.syntax.include".freeze))
+      end
+    end
+
+    def parse(_tokens)
+    end
+
+    def render(context)
+      template_name = context.evaluate(@template_name_expr)
+      partial = load_cached_partial(template_name, context)
+
+      context_variable_name = template_name.split('/'.freeze).last
+
+      variable = if @variable_name_expr
+        context.evaluate(@variable_name_expr)
+      else
+        context.find_variable(template_name)
       end
 
-      super
-    end
-  
-    def parse(tokens)      
-    end
-  
-    def render(context)      
-      source  = Liquid::Template.file_system.read_template_file(context[@template_name])      
-      partial = Liquid::Template.parse(source)      
-      
-      variable = context[@variable_name || @template_name[1..-2]]
-      
-      context.stack do
-        @attributes.each do |key, value|
-          context[key] = context[value]
-        end
-
-        if variable.is_a?(Array)
-          
-          variable.collect do |variable|            
-            context[@template_name[1..-2]] = variable
-            partial.render(context)
+      old_template_name = context.template_name
+      old_partial = context.partial
+      begin
+        context.template_name = template_name
+        context.partial = true
+        context.stack do
+          @attributes.each do |key, value|
+            context[key] = context.evaluate(value)
           end
 
-        else
-                    
-          context[@template_name[1..-2]] = variable
-          partial.render(context)
-          
+          if variable.is_a?(Array)
+            variable.collect do |var|
+              context[context_variable_name] = var
+              partial.render(context)
+            end
+          else
+            context[context_variable_name] = variable
+            partial.render(context)
+          end
         end
+      ensure
+        context.template_name = old_template_name
+        context.partial = old_partial
       end
     end
+
+    private
+
+    alias_method :parse_context, :options
+    private :parse_context
+
+    def load_cached_partial(template_name, context)
+      cached_partials = context.registers[:cached_partials] || {}
+
+      if cached = cached_partials[template_name]
+        return cached
+      end
+      source = read_template_from_file_system(context)
+      begin
+        parse_context.partial = true
+        partial = Liquid::Template.parse(source, parse_context)
+      ensure
+        parse_context.partial = false
+      end
+      cached_partials[template_name] = partial
+      context.registers[:cached_partials] = cached_partials
+      partial
+    end
+
+    def read_template_from_file_system(context)
+      file_system = context.registers[:file_system] || Liquid::Template.file_system
+
+      file_system.read_template_file(context.evaluate(@template_name_expr))
+    end
   end
 
-  Template.register_tag('include', Include)  
-end
+  Template.register_tag('include'.freeze, Include)
+end

lib/liquid/tags/increment.rb

@@ -0,0 +1,31 @@
+module Liquid
+  # increment is used in a place where one needs to insert a counter
+  #     into a template, and needs the counter to survive across
+  #     multiple instantiations of the template.
+  #     (To achieve the survival, the application must keep the context)
+  #
+  #     if the variable does not exist, it is created with value 0.
+  #
+  #   Hello: {% increment variable %}
+  #
+  # gives you:
+  #
+  #    Hello: 0
+  #    Hello: 1
+  #    Hello: 2
+  #
+  class Increment < Tag
+    def initialize(tag_name, markup, options)
+      super
+      @variable = markup.strip
+    end
+
+    def render(context)
+      value = context.environments.first[@variable] ||= 0
+      context.environments.first[@variable] = value + 1
+      value.to_s
+    end
+  end
+
+  Template.register_tag('increment'.freeze, Increment)
+end

lib/liquid/tags/raw.rb

@@ -0,0 +1,41 @@
+module Liquid
+  class Raw < Block
+    Syntax = /\A\s*\z/
+    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
+
+    def initialize(tag_name, markup, parse_context)
+      super
+
+      unless markup =~ Syntax
+        raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_unexpected_args".freeze, tag: tag_name))
+      end
+    end
+
+    def parse(tokens)
+      @body = ''
+      while token = tokens.shift
+        if token =~ FullTokenPossiblyInvalid
+          @body << $1 if $1 != "".freeze
+          return if block_delimiter == $2
+        end
+        @body << token unless token.empty?
+      end
+
+      raise SyntaxError.new(parse_context.locale.t("errors.syntax.tag_never_closed".freeze, block_name: block_name))
+    end
+
+    def render(_context)
+      @body
+    end
+
+    def nodelist
+      [@body]
+    end
+
+    def blank?
+      @body.empty?
+    end
+  end
+
+  Template.register_tag('raw'.freeze, Raw)
+end

lib/liquid/tags/table_row.rb

@@ -0,0 +1,69 @@
+module Liquid
+  class TableRow < Block
+    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/o
+
+    def initialize(tag_name, markup, options)
+      super
+      if markup =~ Syntax
+        @variable_name = $1
+        @collection_name = Expression.parse($2)
+        @attributes = {}
+        markup.scan(TagAttributes) do |key, value|
+          @attributes[key] = Expression.parse(value)
+        end
+      else
+        raise SyntaxError.new(options[:locale].t("errors.syntax.table_row".freeze))
+      end
+    end
+
+    def render(context)
+      collection = context.evaluate(@collection_name) or return ''.freeze
+
+      from = @attributes.key?('offset'.freeze) ? context.evaluate(@attributes['offset'.freeze]).to_i : 0
+      to = @attributes.key?('limit'.freeze) ? from + context.evaluate(@attributes['limit'.freeze]).to_i : nil
+
+      collection = Utils.slice_collection(collection, from, to)
+
+      length = collection.length
+
+      cols = context.evaluate(@attributes['cols'.freeze]).to_i
+
+      row = 1
+      col = 0
+
+      result = "<tr class=\"row1\">\n"
+      context.stack do
+        collection.each_with_index do |item, index|
+          context[@variable_name] = item
+          context['tablerowloop'.freeze] = {
+            'length'.freeze    => length,
+            'index'.freeze     => index + 1,
+            'index0'.freeze    => index,
+            'col'.freeze       => col + 1,
+            'col0'.freeze      => col,
+            'rindex'.freeze    => length - index,
+            'rindex0'.freeze   => length - index - 1,
+            'first'.freeze     => (index == 0),
+            'last'.freeze      => (index == length - 1),
+            'col_first'.freeze => (col == 0),
+            'col_last'.freeze  => (col == cols - 1)
+          }
+
+          col += 1
+
+          result << "<td class=\"col#{col}\">" << super << '</td>'
+
+          if col == cols && (index != length - 1)
+            col  = 0
+            row += 1
+            result << "</tr>\n<tr class=\"row#{row}\">"
+          end
+        end
+      end
+      result << "</tr>\n"
+      result
+    end
+  end
+
+  Template.register_tag('tablerow'.freeze, TableRow)
+end

lib/liquid/tags/unless.rb

@@ -1,33 +1,30 @@
-require File.dirname(__FILE__) + '/if'
+require_relative 'if'
 
 module Liquid
-
   # Unless is a conditional just like 'if' but works on the inverse logic.
   #
-  #   {% unless x < 0 %} x is greater than zero {% end %}
+  #   {% unless x < 0 %} x is greater than zero {% endunless %}
   #
   class Unless < If
     def render(context)
       context.stack do
-        
         # First condition is interpreted backwards ( if not )
-        block = @blocks.first
-        unless block.evaluate(context)
-          return render_all(block.attachment, context)            
+        first_block = @blocks.first
+        unless first_block.evaluate(context)
+          return first_block.attachment.render(context)
         end
-        
+
         # After the first condition unless works just like if
         @blocks[1..-1].each do |block|
-          if block.evaluate(context)            
-            return render_all(block.attachment, context)            
+          if block.evaluate(context)
+            return block.attachment.render(context)
           end
-        end 
-        
-        ''
-      end
-    end    
-  end
-  
+        end
 
-  Template.register_tag('unless', Unless)
-end
+        ''.freeze
+      end
+    end
+  end
+
+  Template.register_tag('unless'.freeze, Unless)
+end

lib/liquid/template.rb

@@ -1,146 +1,244 @@
 module Liquid
-
-  # Templates are central to liquid. 
-  # Interpretating templates is a two step process. First you compile the 
-  # source code you got. During compile time some extensive error checking is performed. 
-  # your code should expect to get some SyntaxErrors. 
+  # Templates are central to liquid.
+  # Interpretating templates is a two step process. First you compile the
+  # source code you got. During compile time some extensive error checking is performed.
+  # your code should expect to get some SyntaxErrors.
   #
-  # After you have a compiled template you can then <tt>render</tt> it. 
-  # You can use a compiled template over and over again and keep it cached. 
+  # After you have a compiled template you can then <tt>render</tt> it.
+  # You can use a compiled template over and over again and keep it cached.
+  #
+  # Example:
   #
-  # Example: 
-  #   
   #   template = Liquid::Template.parse(source)
   #   template.render('user_name' => 'bob')
   #
   class Template
     attr_accessor :root
+    attr_reader :resource_limits, :warnings
+
     @@file_system = BlankFileSystem.new
-    
-    class <<self
+
+    class TagRegistry
+      def initialize
+        @tags  = {}
+        @cache = {}
+      end
+
+      def [](tag_name)
+        return nil unless @tags.key?(tag_name)
+        return @cache[tag_name] if Liquid.cache_classes
+
+        lookup_class(@tags[tag_name]).tap { |o| @cache[tag_name] = o }
+      end
+
+      def []=(tag_name, klass)
+        @tags[tag_name]  = klass.name
+        @cache[tag_name] = klass
+      end
+
+      def delete(tag_name)
+        @tags.delete(tag_name)
+        @cache.delete(tag_name)
+      end
+
+      private
+
+      def lookup_class(name)
+        name.split("::").reject(&:empty?).reduce(Object) { |scope, const| scope.const_get(const) }
+      end
+    end
+
+    attr_reader :profiler
+
+    class << self
+      # Sets how strict the parser should be.
+      # :lax acts like liquid 2.5 and silently ignores malformed tags in most cases.
+      # :warn is the default and will give deprecation warnings when invalid syntax is used.
+      # :strict will enforce correct syntax.
+      attr_writer :error_mode
+
+      # Sets how strict the taint checker should be.
+      # :lax is the default, and ignores the taint flag completely
+      # :warn adds a warning, but does not interrupt the rendering
+      # :error raises an error when tainted output is used
+      attr_writer :taint_mode
+
       def file_system
         @@file_system
       end
-    
+
       def file_system=(obj)
         @@file_system = obj
       end
-          
-      def register_tag(name, klass)      
+
+      def register_tag(name, klass)
         tags[name.to_s] = klass
-      end                        
-    
-      def tags
-        @tags ||= {}
       end
-        
-      # Pass a module with filter methods which should be available 
+
+      def tags
+        @tags ||= TagRegistry.new
+      end
+
+      def error_mode
+        @error_mode || :lax
+      end
+
+      def taint_mode
+        @taint_mode || :lax
+      end
+
+      # Pass a module with filter methods which should be available
       # to all liquid views. Good for registering the standard library
-      def register_filter(mod)      
+      def register_filter(mod)
         Strainer.global_filter(mod)
-      end                        
-            
+      end
+
+      def default_resource_limits
+        @default_resource_limits ||= {}
+      end
+
       # creates a new <tt>Template</tt> object from liquid source code
-      def parse(source)
+      # To enable profiling, pass in <tt>profile: true</tt> as an option.
+      # See Liquid::Profiler for more information
+      def parse(source, options = {})
         template = Template.new
-        template.parse(source)
-        template
-      end                           
+        template.parse(source, options)
+      end
     end
 
-    # creates a new <tt>Template</tt> from an array of tokens. Use <tt>Template.parse</tt> instead
     def initialize
+      @resource_limits = ResourceLimits.new(self.class.default_resource_limits)
     end
-    
-    # Parse source code. 
-    # Returns self for easy chaining    
-    def parse(source)
-      @root = Document.new(tokenize(source))
+
+    # Parse source code.
+    # Returns self for easy chaining
+    def parse(source, options = {})
+      @options = options
+      @profiling = options[:profile]
+      @line_numbers = options[:line_numbers] || @profiling
+      parse_context = options.is_a?(ParseContext) ? options : ParseContext.new(options)
+      @root = Document.parse(tokenize(source), parse_context)
+      @warnings = parse_context.warnings
       self
     end
-    
-    def registers 
+
+    def registers
       @registers ||= {}
     end
-    
+
     def assigns
       @assigns ||= {}
     end
-    
+
+    def instance_assigns
+      @instance_assigns ||= {}
+    end
+
     def errors
       @errors ||= []
     end
-        
+
     # Render takes a hash with local variables.
     #
-    # if you use the same filters over and over again consider registering them globally 
+    # if you use the same filters over and over again consider registering them globally
     # with <tt>Template.register_filter</tt>
-    # 
+    #
+    # if profiling was enabled in <tt>Template#parse</tt> then the resulting profiling information
+    # will be available via <tt>Template#profiler</tt>
+    #
     # Following options can be passed:
-    #  
+    #
     #  * <tt>filters</tt> : array with local filters
-    #  * <tt>registers</tt> : hash with register variables. Those can be accessed from 
-    #    filters and tags and might be useful to integrate liquid more with its host application  
+    #  * <tt>registers</tt> : hash with register variables. Those can be accessed from
+    #    filters and tags and might be useful to integrate liquid more with its host application
     #
     def render(*args)
-      return '' if @root.nil?                          
+      return ''.freeze if @root.nil?
 
       context = case args.first
       when Liquid::Context
-        args.shift
+        c = args.shift
+
+        if @rethrow_errors
+          c.exception_handler = ->(e) { raise }
+        end
+
+        c
+      when Liquid::Drop
+        drop = args.shift
+        drop.context = Context.new([drop, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
       when Hash
-        self.assigns.merge!(args.shift)        
-        Context.new(assigns, registers, @rethrow_errors)
+        Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
       when nil
-        Context.new(assigns, registers, @rethrow_errors)
+        Context.new(assigns, instance_assigns, registers, @rethrow_errors, @resource_limits)
       else
-        raise ArgumentError, "Expect Hash or Liquid::Context as parameter"
+        raise ArgumentError, "Expected Hash or Liquid::Context as parameter"
       end
-      
+
       case args.last
       when Hash
         options = args.pop
-        
+
         if options[:registers].is_a?(Hash)
-          self.registers.merge!(options[:registers])  
+          registers.merge!(options[:registers])
         end
 
         if options[:filters]
           context.add_filters(options[:filters])
-        end                         
-        
+        end
+
+        if options[:exception_handler]
+          context.exception_handler = options[:exception_handler]
+        end
       when Module
-        context.add_filters(args.pop)    
+        context.add_filters(args.pop)
       when Array
-        context.add_filters(args.pop)            
+        context.add_filters(args.pop)
       end
-                                                            
+
+      # Retrying a render resets resource usage
+      context.resource_limits.reset
+
       begin
         # render the nodelist.
-        # for performance reasons we get a array back here. join will make a string out of it
-        @root.render(context).join
+        # for performance reasons we get an array back here. join will make a string out of it.
+        result = with_profiling(context) do
+          @root.render(context)
+        end
+        result.respond_to?(:join) ? result.join : result
+      rescue Liquid::MemoryError => e
+        context.handle_error(e)
       ensure
         @errors = context.errors
       end
     end
-    
+
     def render!(*args)
-      @rethrow_errors = true; render(*args)
+      @rethrow_errors = true
+      render(*args)
     end
-       
+
     private
-    
-    # Uses the <tt>Liquid::TemplateParser</tt> regexp to tokenize the passed source
+
     def tokenize(source)
-      source = source.source if source.respond_to?(:source)      
-      return [] if source.to_s.empty?
-      tokens = source.split(TemplateParser)
-
-      # removes the rogue empty element at the beginning of the array
-      tokens.shift if tokens[0] and tokens[0].empty? 
-
-      tokens
+      Tokenizer.new(source, @line_numbers)
     end
-     
-  end  
+
+    def with_profiling(context)
+      if @profiling && !context.partial
+        raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Liquid::Profiler)
+
+        @profiler = Profiler.new
+        @profiler.start
+
+        begin
+          yield
+        ensure
+          @profiler.stop
+        end
+      else
+        yield
+      end
+    end
+  end
 end

lib/liquid/tokenizer.rb

@@ -0,0 +1,31 @@
+module Liquid
+  class Tokenizer
+    attr_reader :line_number
+
+    def initialize(source, line_numbers = false)
+      @source = source
+      @line_number = 1 if line_numbers
+      @tokens = tokenize
+    end
+
+    def shift
+      token = @tokens.shift
+      @line_number += token.count("\n") if @line_number && token
+      token
+    end
+
+    private
+
+    def tokenize
+      @source = @source.source if @source.respond_to?(:source)
+      return [] if @source.to_s.empty?
+
+      tokens = @source.split(TemplateParser)
+
+      # removes the rogue empty element at the beginning of the array
+      tokens.shift if tokens[0] && tokens[0].empty?
+
+      tokens
+    end
+  end
+end

lib/liquid/utils.rb

@@ -0,0 +1,79 @@
+module Liquid
+  module Utils
+    def self.slice_collection(collection, from, to)
+      if (from != 0 || !to.nil?) && collection.respond_to?(:load_slice)
+        collection.load_slice(from, to)
+      else
+        slice_collection_using_each(collection, from, to)
+      end
+    end
+
+    def self.slice_collection_using_each(collection, from, to)
+      segments = []
+      index = 0
+
+      # Maintains Ruby 1.8.7 String#each behaviour on 1.9
+      if collection.is_a?(String)
+        return collection.empty? ? [] : [collection]
+      end
+      return [] unless collection.respond_to?(:each)
+
+      collection.each do |item|
+        if to && to <= index
+          break
+        end
+
+        if from <= index
+          segments << item
+        end
+
+        index += 1
+      end
+
+      segments
+    end
+
+    def self.to_integer(num)
+      return num if num.is_a?(Integer)
+      num = num.to_s
+      begin
+        Integer(num)
+      rescue ::ArgumentError
+        raise Liquid::ArgumentError, "invalid integer"
+      end
+    end
+
+    def self.to_number(obj)
+      case obj
+      when Float
+        BigDecimal.new(obj.to_s)
+      when Numeric
+        obj
+      when String
+        (obj.strip =~ /\A\d+\.\d+\z/) ? BigDecimal.new(obj) : obj.to_i
+      else
+        0
+      end
+    end
+
+    def self.to_date(obj)
+      return obj if obj.respond_to?(:strftime)
+
+      if obj.is_a?(String)
+        return nil if obj.empty?
+        obj = obj.downcase
+      end
+
+      case obj
+      when 'now'.freeze, 'today'.freeze
+        Time.now
+      when /\A\d+\z/, Integer
+        Time.at(obj.to_i)
+      when String
+        Time.parse(obj)
+      end
+    rescue ArgumentError
+      nil
+    end
+  end
+end

lib/liquid/variable.rb

@@ -1,5 +1,4 @@
 module Liquid
-
   # Holds variables. Variables are only loaded "just in time"
   # and are not evaluated as part of the render stage
   #
@@ -11,41 +10,140 @@ module Liquid
   #   {{ user | link }}
   #
   class Variable
-    attr_accessor :filters, :name
+    capture_ignored_variable_prefix = /([\s,\|'"]+?)??/
+    capture_expression = /(#{QuotedFragment})/o
+    capture_ignored_filter_prefix = /([^\|]+?)??/
+    capture_filters = /(#{FilterSeparator}.*)/o
+    VariableSyntax = /\A\s*#{capture_ignored_variable_prefix}\s*#{capture_expression}\s*(?:#{capture_ignored_filter_prefix}\s*#{capture_filters})?\z/om
 
-    def initialize(markup)
+    capture_lax_separator = /(['"\|]+?)/
+    capture_filter = /((?:\s+|#{QuotedFragment}|#{ArgumentSeparator})+)/o
+    FilterParser = /\s*(?:#{FilterSeparator}|#{capture_lax_separator})\s*#{capture_filter}/o
+
+    attr_accessor :filters, :name, :line_number
+    attr_reader :parse_context
+    alias_method :options, :parse_context
+    include ParserSwitching
+
+    def initialize(markup, parse_context)
       @markup  = markup
       @name    = nil
+      @parse_context = parse_context
+      @line_number = parse_context.line_number
+
+      parse_with_selected_parser(markup)
+    end
+
+    def raw
+      @markup
+    end
+
+    def markup_context(markup)
+      "in \"{{#{markup}}}\""
+    end
+
+    def lax_parse(markup)
       @filters = []
-      if match = markup.match(/\s*(#{QuotedFragment})/)
-        @name = match[1]
-        if markup.match(/#{FilterSeparator}\s*(.*)/)
-          filters = Regexp.last_match(1).split(/#{FilterSeparator}/)
-          filters.each do |f|    
-            if matches = f.match(/\s*(\w+)/)
-              filtername = matches[1]
-              filterargs = f.scan(/(?:#{FilterArgumentSeparator}|#{ArgumentSeparator})\s*(#{QuotedFragment})/).flatten
-              @filters << [filtername.to_sym, filterargs]
-            end
-          end
+      return unless markup =~ VariableSyntax
+
+      add_syntax_warning("variable prefixed with ignored characters: #{$1.inspect}") if $1
+      name_markup = $2
+      add_syntax_warning("variable filter separator prefixed with ignored characters: #{$3.inspect}") if $3
+      filters_markup = $4
+      @name = Expression.parse(name_markup)
+      if filters_markup
+        filters_markup.scan(FilterParser) do |lax_sep, f|
+          add_syntax_warning("unterminated quote or multiple pipe characters used as a filter separator: #{lax_sep.inspect}") if lax_sep
+          next unless f =~ /\A\s*(\W+)??(\w+)/
+          add_syntax_warning("ignored characters before filter name: #{$1.inspect}") if $1
+          filtername = $2
+          filterargs = f.scan(/(?:#{FilterArgumentSeparator}|#{ArgumentSeparator})\s*((?:\w+\s*\:\s*)?#{QuotedFragment})/o).flatten
+          @filters << parse_filter_expressions(filtername, filterargs)
         end
       end
     end
 
+    def strict_parse(markup)
+      @filters = []
+      p = Parser.new(markup)
+
+      @name = Expression.parse(p.expression)
+      while p.consume?(:pipe)
+        filtername = p.consume(:id)
+        filterargs = p.consume?(:colon) ? parse_filterargs(p) : []
+        @filters << parse_filter_expressions(filtername, filterargs)
+      end
+      p.consume(:end_of_string)
+    end
+
+    def parse_filterargs(p)
+      # first argument
+      filterargs = [p.argument]
+      # followed by comma separated others
+      filterargs << p.argument while p.consume?(:comma)
+      filterargs
+    end
+
     def render(context)
-      return '' if @name.nil?
-      output = context[@name]
-      @filters.inject(output) do |output, filter|
-        filterargs = filter[1].to_a.collect do |a|
-         context[a]
-        end
-        begin
-          output = context.invoke(filter[0], output, *filterargs)
-        rescue FilterNotFound
-          raise FilterNotFound, "Error - filter '#{filter[0]}' in '#{@markup.strip}' could not be found."
+      @filters.inject(context.evaluate(@name)) do |output, (filter_name, filter_args, filter_kwargs)|
+        filter_args = evaluate_filter_expressions(context, filter_args, filter_kwargs)
+        context.invoke(filter_name, output, *filter_args)
+      end.tap{ |obj| taint_check(context, obj) }
+    end
+
+    private
+
+    def add_syntax_warning(warning)
+      return unless parse_context.error_mode == :lax_warn
+      error = SyntaxError.new(warning)
+      error.line_number = parse_context.line_number
+      parse_context.warnings << error
+    end
+
+    def parse_filter_expressions(filter_name, unparsed_args)
+      filter_args = []
+      keyword_args = {}
+      unparsed_args.each do |a|
+        if matches = a.match(/\A#{TagAttributes}\z/o)
+          keyword_args[matches[1]] = Expression.parse(matches[2])
+        else
+          filter_args << Expression.parse(a)
         end
       end
-      output
+      result = [filter_name, filter_args]
+      result << keyword_args unless keyword_args.empty?
+      result
+    end
+
+    def evaluate_filter_expressions(context, filter_args, filter_kwargs)
+      parsed_args = filter_args.map{ |expr| context.evaluate(expr) }
+      if filter_kwargs
+        parsed_kwargs = {}
+        filter_kwargs.each do |key, expr|
+          parsed_kwargs[key] = context.evaluate(expr)
+        end
+        parsed_args << parsed_kwargs
+      end
+      parsed_args
+    end
+
+    def taint_check(context, obj)
+      return unless obj.tainted?
+      return if Template.taint_mode == :lax
+
+      @markup =~ QuotedFragment
+      name = Regexp.last_match(0)
+
+      error = TaintedError.new("variable '#{name}' is tainted and was not escaped")
+      error.line_number = line_number
+      error.template_name = context.template_name
+
+      case Template.taint_mode
+      when :warn
+        context.warnings << error
+      when :error
+        raise error
+      end
     end
   end
-end
+end

lib/liquid/variable_lookup.rb

@@ -0,0 +1,80 @@
+module Liquid
+  class VariableLookup
+    SQUARE_BRACKETED = /\A\[(.*)\]\z/m
+    COMMAND_METHODS = ['size'.freeze, 'first'.freeze, 'last'.freeze]
+
+    attr_reader :name, :lookups
+
+    def self.parse(markup)
+      new(markup)
+    end
+
+    def initialize(markup)
+      lookups = markup.scan(VariableParser)
+
+      name = lookups.shift
+      if name =~ SQUARE_BRACKETED
+        name = Expression.parse($1)
+      end
+      @name = name
+
+      @lookups = lookups
+      @command_flags = 0
+
+      @lookups.each_index do |i|
+        lookup = lookups[i]
+        if lookup =~ SQUARE_BRACKETED
+          lookups[i] = Expression.parse($1)
+        elsif COMMAND_METHODS.include?(lookup)
+          @command_flags |= 1 << i
+        end
+      end
+    end
+
+    def evaluate(context)
+      name = context.evaluate(@name)
+      object = context.find_variable(name)
+
+      @lookups.each_index do |i|
+        key = context.evaluate(@lookups[i])
+
+        # If object is a hash- or array-like object we look for the
+        # presence of the key and if its available we return it
+        if object.respond_to?(:[]) &&
+            ((object.respond_to?(:key?) && object.key?(key)) ||
+             (object.respond_to?(:fetch) && key.is_a?(Integer)))
+
+          # if its a proc we will replace the entry with the proc
+          res = context.lookup_and_evaluate(object, key)
+          object = res.to_liquid
+
+          # Some special cases. If the part wasn't in square brackets and
+          # no key with the same name was found we interpret following calls
+          # as commands and call them on the current object
+        elsif @command_flags & (1 << i) != 0 && object.respond_to?(key)
+          object = object.send(key).to_liquid
+
+          # No key was present with the desired value and it wasn't one of the directly supported
+          # keywords either. The only thing we got left is to return nil
+        else
+          return nil
+        end
+
+        # If we are dealing with a drop here we have to
+        object.context = context if object.respond_to?(:context=)
+      end
+
+      object
+    end
+
+    def ==(other)
+      self.class == other.class && state == other.state
+    end
+
+    protected
+
+    def state
+      [@name, @lookups, @command_flags]
+    end
+  end
+end

lib/liquid/version.rb

@@ -0,0 +1,4 @@
+# encoding: utf-8
+module Liquid
+  VERSION = "4.0.0.alpha"
+end

liquid.gemspec

@@ -1,19 +1,29 @@
+# encoding: utf-8
+lib = File.expand_path('../lib/', __FILE__)
+$LOAD_PATH.unshift lib unless $LOAD_PATH.include?(lib)
+
+require "liquid/version"
+
 Gem::Specification.new do |s|
-  s.name = %q{liquid}
-  s.version = "1.9.0"
-  s.specification_version = 2 if s.respond_to? :specification_version=
-  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
-  s.authors = ["Tobias Luetke"]
-  s.date = %q{2008-06-23}
-  s.description = %q{A secure non evaling end user template engine with aesthetic markup.}
-  s.email = %q{tobi@leetsoft.com}
-  s.extra_rdoc_files = ["History.txt", "Manifest.txt", "README.txt"]
-  s.files = ["CHANGELOG", "History.txt", "MIT-LICENSE", "Manifest.txt", "README.txt", "Rakefile", "lib/extras/liquid_view.rb", "lib/liquid.rb", "lib/liquid/block.rb", "lib/liquid/condition.rb", "lib/liquid/context.rb", "lib/liquid/document.rb", "lib/liquid/drop.rb", "lib/liquid/errors.rb", "lib/liquid/extensions.rb", "lib/liquid/file_system.rb", "lib/liquid/htmltags.rb", "lib/liquid/module_ex.rb", "lib/liquid/standardfilters.rb", "lib/liquid/strainer.rb", "lib/liquid/tag.rb", "lib/liquid/tags/assign.rb", "lib/liquid/tags/capture.rb", "lib/liquid/tags/case.rb", "lib/liquid/tags/comment.rb", "lib/liquid/tags/cycle.rb", "lib/liquid/tags/for.rb", "lib/liquid/tags/if.rb", "lib/liquid/tags/ifchanged.rb", "lib/liquid/tags/include.rb", "lib/liquid/tags/unless.rb", "lib/liquid/template.rb", "lib/liquid/variable.rb"]
-  s.has_rdoc = true
-  s.homepage = %q{http://www.liquidmarkup.org}
-  s.rdoc_options = ["--main", "README.txt"]
-  s.require_paths = ["lib"]
-  s.rubyforge_project = %q{liquid}
-  s.rubygems_version = %q{1.2.0}
-  s.summary = %q{A secure non evaling end user template engine with aesthetic markup.}
+  s.name        = "liquid"
+  s.version     = Liquid::VERSION
+  s.platform    = Gem::Platform::RUBY
+  s.summary     = "A secure, non-evaling end user template engine with aesthetic markup."
+  s.authors     = ["Tobias Lütke"]
+  s.email       = ["tobi@leetsoft.com"]
+  s.homepage    = "http://www.liquidmarkup.org"
+  s.license     = "MIT"
+  # s.description = "A secure, non-evaling end user template engine with aesthetic markup."
+
+  s.required_rubygems_version = ">= 1.3.7"
+
+  s.test_files  = Dir.glob("{test}/**/*")
+  s.files       = Dir.glob("{lib}/**/*") + %w(MIT-LICENSE README.md)
+
+  s.extra_rdoc_files  = ["History.md", "README.md"]
+
+  s.require_path = "lib"
+
+  s.add_development_dependency 'rake'
+  s.add_development_dependency 'minitest'
 end

performance/benchmark.rb

@@ -0,0 +1,17 @@
+require 'benchmark/ips'
+require_relative 'theme_runner'
+
+Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
+profiler = ThemeRunner.new
+
+Benchmark.ips do |x|
+  x.time = 60
+  x.warmup = 5
+
+  puts
+  puts "Running benchmark for #{x.time} seconds (with #{x.warmup} seconds warmup)."
+  puts
+
+  x.report("parse:") { profiler.compile }
+  x.report("parse & run:") { profiler.run }
+end

performance/profile.rb

@@ -0,0 +1,24 @@
+require 'stackprof'
+require_relative 'theme_runner'
+
+Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
+profiler = ThemeRunner.new
+profiler.run
+
+[:cpu, :object].each do |profile_type|
+  puts "Profiling in #{profile_type} mode..."
+  results = StackProf.run(mode: profile_type) do
+    200.times do
+      profiler.run
+    end
+  end
+
+  if profile_type == :cpu && graph_filename = ENV['GRAPH_FILENAME']
+    File.open(graph_filename, 'w') do |f|
+      StackProf::Report.new(results).print_graphviz(nil, f)
+    end
+  end
+
+  StackProf::Report.new(results).print_text(false, 20)
+  File.write(ENV['FILENAME'] + "." + profile_type.to_s, Marshal.dump(results)) if ENV['FILENAME']
+end

performance/shopify/comment_form.rb

@@ -0,0 +1,33 @@
+class CommentForm < Liquid::Block
+  Syntax = /(#{Liquid::VariableSignature}+)/
+
+  def initialize(tag_name, markup, options)
+    super
+
+    if markup =~ Syntax
+      @variable_name = $1
+      @attributes = {}
+    else
+      raise SyntaxError.new("Syntax Error in 'comment_form' - Valid syntax: comment_form [article]")
+    end
+  end
+
+  def render(context)
+    article = context[@variable_name]
+
+    context.stack do
+      context['form'] = {
+        'posted_successfully?' => context.registers[:posted_successfully],
+        'errors' => context['comment.errors'],
+        'author' => context['comment.author'],
+        'email'  => context['comment.email'],
+        'body'   => context['comment.body']
+      }
+      wrap_in_form(article, render_all(@nodelist, context))
+    end
+  end
+
+  def wrap_in_form(article, input)
+    %(<form id="article-#{article.id}-comment-form" class="comment-form" method="post" action="">\n#{input}\n</form>)
+  end
+end

performance/shopify/database.rb

@@ -0,0 +1,45 @@
+require 'yaml'
+
+module Database
+  # Load the standard vision toolkit database and re-arrage it to be simply exportable
+  # to liquid as assigns. All this is based on Shopify
+  def self.tables
+    @tables ||= begin
+      db = YAML.load_file("#{__dir__}/vision.database.yml")
+
+      # From vision source
+      db['products'].each do |product|
+        collections = db['collections'].find_all do |collection|
+          collection['products'].any? { |p| p['id'].to_i == product['id'].to_i }
+        end
+        product['collections'] = collections
+      end
+
+      # key the tables by handles, as this is how liquid expects it.
+      db = db.inject({}) do |assigns, (key, values)|
+        assigns[key] = values.inject({}) { |h, v| h[v['handle']] = v; h; }
+        assigns
+      end
+
+      # Some standard direct accessors so that the specialized templates
+      # render correctly
+      db['collection'] = db['collections'].values.first
+      db['product']    = db['products'].values.first
+      db['blog']       = db['blogs'].values.first
+      db['article']    = db['blog']['articles'].first
+
+      db['cart']       = {
+        'total_price' => db['line_items'].values.inject(0) { |sum, item| sum += item['line_price'] * item['quantity'] },
+        'item_count'  => db['line_items'].values.inject(0) { |sum, item| sum += item['quantity'] },
+        'items'       => db['line_items'].values
+      }
+
+      db
+    end
+  end
+end
+
+if __FILE__ == $PROGRAM_NAME
+  p Database.tables['collections']['frontpage'].keys
+  # p Database.tables['blog']['articles']
+end

performance/shopify/json_filter.rb

@@ -0,0 +1,7 @@
+require 'json'
+
+module JsonFilter
+  def json(object)
+    JSON.dump(object.reject { |k, v| k == "collections" })
+  end
+end

performance/shopify/liquid.rb

@@ -0,0 +1,19 @@
+$:.unshift __dir__ + '/../../lib'
+require_relative '../../lib/liquid'
+
+require_relative 'comment_form'
+require_relative 'paginate'
+require_relative 'json_filter'
+require_relative 'money_filter'
+require_relative 'shop_filter'
+require_relative 'tag_filter'
+require_relative 'weight_filter'
+
+Liquid::Template.register_tag 'paginate', Paginate
+Liquid::Template.register_tag 'form', CommentForm
+
+Liquid::Template.register_filter JsonFilter
+Liquid::Template.register_filter MoneyFilter
+Liquid::Template.register_filter WeightFilter
+Liquid::Template.register_filter ShopFilter
+Liquid::Template.register_filter TagFilter

performance/shopify/money_filter.rb

@@ -0,0 +1,17 @@
+module MoneyFilter
+  def money_with_currency(money)
+    return '' if money.nil?
+    sprintf("$ %.2f USD", money / 100.0)
+  end
+
+  def money(money)
+    return '' if money.nil?
+    sprintf("$ %.2f", money / 100.0)
+  end
+
+  private
+
+  def currency
+    ShopDrop.new.currency
+  end
+end

performance/shopify/paginate.rb

@@ -0,0 +1,90 @@
+class Paginate < Liquid::Block
+  Syntax     = /(#{Liquid::QuotedFragment})\s*(by\s*(\d+))?/
+
+  def initialize(tag_name, markup, options)
+    super
+
+    if markup =~ Syntax
+      @collection_name = $1
+      @page_size = if $2
+        $3.to_i
+      else
+        20
+      end
+
+      @attributes = { 'window_size' => 3 }
+      markup.scan(Liquid::TagAttributes) do |key, value|
+        @attributes[key] = value
+      end
+    else
+      raise SyntaxError.new("Syntax Error in tag 'paginate' - Valid syntax: paginate [collection] by number")
+    end
+  end
+
+  def render(context)
+    @context = context
+
+    context.stack do
+      current_page  = context['current_page'].to_i
+
+      pagination = {
+        'page_size'      => @page_size,
+        'current_page'   => 5,
+        'current_offset' => @page_size * 5
+      }
+
+      context['paginate'] = pagination
+
+      collection_size  = context[@collection_name].size
+
+      raise ArgumentError.new("Cannot paginate array '#{@collection_name}'. Not found.") if collection_size.nil?
+
+      page_count = (collection_size.to_f / @page_size.to_f).to_f.ceil + 1
+
+      pagination['items']      = collection_size
+      pagination['pages']      = page_count - 1
+      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless 1 >= current_page
+      pagination['next']       = link('Next &raquo;', current_page + 1)      unless page_count <= current_page + 1
+      pagination['parts']      = []
+
+      hellip_break = false
+
+      if page_count > 2
+        1.upto(page_count - 1) do |page|
+          if current_page == page
+            pagination['parts'] << no_link(page)
+          elsif page == 1
+            pagination['parts'] << link(page, page)
+          elsif page == page_count - 1
+            pagination['parts'] << link(page, page)
+          elsif page <= current_page - @attributes['window_size'] || page >= current_page + @attributes['window_size']
+            next if hellip_break
+            pagination['parts'] << no_link('&hellip;')
+            hellip_break = true
+            next
+          else
+            pagination['parts'] << link(page, page)
+          end
+
+          hellip_break = false
+        end
+      end
+
+      super
+    end
+  end
+
+  private
+
+  def no_link(title)
+    { 'title' => title, 'is_link' => false }
+  end
+
+  def link(title, page)
+    { 'title' => title, 'url' => current_url + "?page=#{page}", 'is_link' => true }
+  end
+
+  def current_url
+    "/collections/frontpage"
+  end
+end

performance/shopify/shop_filter.rb

@@ -0,0 +1,106 @@
+module ShopFilter
+  def asset_url(input)
+    "/files/1/[shop_id]/[shop_id]/assets/#{input}"
+  end
+
+  def global_asset_url(input)
+    "/global/#{input}"
+  end
+
+  def shopify_asset_url(input)
+    "/shopify/#{input}"
+  end
+
+  def script_tag(url)
+    %(<script src="#{url}" type="text/javascript"></script>)
+  end
+
+  def stylesheet_tag(url, media = "all")
+    %(<link href="#{url}" rel="stylesheet" type="text/css"  media="#{media}"  />)
+  end
+
+  def link_to(link, url, title = "")
+    %(<a href="#{url}" title="#{title}">#{link}</a>)
+  end
+
+  def img_tag(url, alt = "")
+    %(<img src="#{url}" alt="#{alt}" />)
+  end
+
+  def link_to_vendor(vendor)
+    if vendor
+      link_to vendor, url_for_vendor(vendor), vendor
+    else
+      'Unknown Vendor'
+    end
+  end
+
+  def link_to_type(type)
+    if type
+      link_to type, url_for_type(type), type
+    else
+      'Unknown Vendor'
+    end
+  end
+
+  def url_for_vendor(vendor_title)
+    "/collections/#{to_handle(vendor_title)}"
+  end
+
+  def url_for_type(type_title)
+    "/collections/#{to_handle(type_title)}"
+  end
+
+  def product_img_url(url, style = 'small')
+    unless url =~ /\Aproducts\/([\w\-\_]+)\.(\w{2,4})/
+      raise ArgumentError, 'filter "size" can only be called on product images'
+    end
+
+    case style
+    when 'original'
+      return '/files/shops/random_number/' + url
+    when 'grande', 'large', 'medium', 'compact', 'small', 'thumb', 'icon'
+      "/files/shops/random_number/products/#{$1}_#{style}.#{$2}"
+    else
+      raise ArgumentError, 'valid parameters for filter "size" are: original, grande, large, medium, compact, small, thumb and icon '
+    end
+  end
+
+  def default_pagination(paginate)
+    html = []
+    html << %(<span class="prev">#{link_to(paginate['previous']['title'], paginate['previous']['url'])}</span>) if paginate['previous']
+
+    for part in paginate['parts']
+
+      if part['is_link']
+        html << %(<span class="page">#{link_to(part['title'], part['url'])}</span>)
+      elsif part['title'].to_i == paginate['current_page'].to_i
+        html << %(<span class="page current">#{part['title']}</span>)
+      else
+        html << %(<span class="deco">#{part['title']}</span>)
+      end
+
+    end
+
+    html << %(<span class="next">#{link_to(paginate['next']['title'], paginate['next']['url'])}</span>) if paginate['next']
+    html.join(' ')
+  end
+
+  # Accepts a number, and two words - one for singular, one for plural
+  # Returns the singular word if input equals 1, otherwise plural
+  def pluralize(input, singular, plural)
+    input == 1 ? singular : plural
+  end
+
+  private
+
+  def to_handle(str)
+    result = str.dup
+    result.downcase!
+    result.delete!("'\"()[]")
+    result.gsub!(/\W+/, '-')
+    result.gsub!(/-+\z/, '') if result[-1] == '-'
+    result.gsub!(/\A-+/, '') if result[0] == '-'
+    result
+  end
+end

performance/shopify/tag_filter.rb

@@ -0,0 +1,23 @@
+module TagFilter
+  def link_to_tag(label, tag)
+    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tag}\">#{label}</a>"
+  end
+
+  def highlight_active_tag(tag, css_class = 'active')
+    if @context['current_tags'].include?(tag)
+      "<span class=\"#{css_class}\">#{tag}</span>"
+    else
+      tag
+    end
+  end
+
+  def link_to_add_tag(label, tag)
+    tags = (@context['current_tags'] + [tag]).uniq
+    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join("+")}\">#{label}</a>"
+  end
+
+  def link_to_remove_tag(label, tag)
+    tags = (@context['current_tags'] - [tag]).uniq
+    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join("+")}\">#{label}</a>"
+  end
+end

performance/shopify/vision.database.yml

@@ -0,0 +1,945 @@
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+#   Variants
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+product_variants:
+  - &product-1-var-1
+    id: 1
+    title: 151cm / Normal
+    price: 19900
+    weight: 1000
+    compare_at_price: 49900
+    available: true
+    inventory_quantity: 5
+    option1: 151cm
+    option2: Normal
+    option3:
+  - &product-1-var-2
+    id: 2
+    title: 155cm / Normal
+    price: 31900
+    weight: 1000
+    compare_at_price: 50900
+    available: true
+    inventory_quantity: 2
+    option1: 155cm
+    option2: Normal
+    option3:
+  - &product-2-var-1
+    id: 3
+    title: 162cm
+    price: 29900
+    weight: 1000
+    compare_at_price: 52900
+    available: true
+    inventory_quantity: 3
+    option1: 162cm
+    option2:
+    option3:
+  - &product-3-var-1
+    id: 4
+    title: 159cm
+    price: 19900
+    weight: 1000
+    compare_at_price:
+    available: true
+    inventory_quantity: 4
+    option1: 159cm
+    option2:
+    option3:
+  - &product-4-var-1
+    id: 5
+    title: 159cm
+    price: 19900
+    weight: 1000
+    compare_at_price: 32900
+    available: true
+    inventory_quantity: 6
+    option1: 159cm
+    option2:
+    option3:
+  - &product-1-var-3
+    id: 6
+    title: 158cm / Wide
+    price: 23900
+    weight: 1000
+    compare_at_price: 99900
+    available: false
+    inventory_quantity: 0
+    option1: 158cm
+    option2: Wide
+    option3:
+  - &product-3-var-2
+    id: 7
+    title: 162cm
+    price: 19900
+    weight: 1000
+    compare_at_price:
+    available: false
+    inventory_quantity: 0
+    option1: 162cm
+    option2:
+    option3:
+  - &product-3-var-3
+    id: 8
+    title: 165cm
+    price: 22900
+    weight: 1000
+    compare_at_price:
+    available: true
+    inventory_quantity: 4
+    option1: 165cm
+    option2:
+    option3:
+  - &product-5-var-1
+    id: 9
+    title: black / 42
+    price: 11900
+    weight: 500
+    compare_at_price: 22900
+    available: true
+    inventory_quantity: 1
+    option1: black
+    option2: 42
+    option3:
+  - &product-5-var-2
+    id: 10
+    title: beige / 42
+    price: 11900
+    weight: 500
+    compare_at_price: 22900
+    available: true
+    inventory_quantity: 3
+    option1: beige
+    option2: 42
+    option3:
+  - &product-5-var-3
+    id: 11
+    title: white / 42
+    price: 13900
+    weight: 500
+    compare_at_price: 24900
+    available: true
+    inventory_quantity: 1
+    option1: white
+    option2: 42
+    option3:
+  - &product-5-var-4
+    id: 12
+    title: black / 44
+    price: 11900
+    weight: 500
+    compare_at_price: 22900
+    available: true
+    inventory_quantity: 2
+    option1: black
+    option2: 44
+    option3:
+  - &product-5-var-5
+    id: 13
+    title: beige / 44
+    price: 11900
+    weight: 500
+    compare_at_price: 22900
+    available: false
+    inventory_quantity: 0
+    option1: beige
+    option2: 44
+    option3:
+  - &product-5-var-6
+    id: 14
+    title: white / 44
+    price: 13900
+    weight: 500
+    compare_at_price: 24900
+    available: false
+    inventory_quantity: 0
+    option1: white
+    option2: 44
+    option3:
+  - &product-6-var-1
+    id: 15
+    title: red
+    price: 2179500
+    weight: 200000
+    compare_at_price:
+    available: true
+    inventory_quantity: 0
+    option1: red
+    option2:
+    option3:
+  - &product-7-var-1
+    id: 16
+    title: black / small
+    price: 1900
+    weight: 200
+    compare_at_price:
+    available: true
+    inventory_quantity: 20
+    option1: black
+    option2: small
+    option3:
+  - &product-7-var-2
+    id: 17
+    title: black / medium
+    price: 1900
+    weight: 200
+    compare_at_price:
+    available: false
+    inventory_quantity: 0
+    option1: black
+    option2: medium
+    option3:
+  - &product-7-var-3
+    id: 18
+    title: black / large
+    price: 1900
+    weight: 200
+    compare_at_price:
+    available: true
+    inventory_quantity: 10
+    option1: black
+    option2: large
+    option3:
+  - &product-7-var-4
+    id: 19
+    title: black / extra large
+    price: 1900
+    weight: 200
+    compare_at_price:
+    available: false
+    inventory_quantity: 0
+    option1: black
+    option2: extra large
+    option3:
+  - &product-8-var-1
+    id: 20
+    title: brown / small
+    price: 5900
+    weight: 400
+    compare_at_price: 6900
+    available: true
+    inventory_quantity: 5
+    option1: brown
+    option2: small
+    option3:
+  - &product-8-var-2
+    id: 21
+    title: brown / medium
+    price: 5900
+    weight: 400
+    compare_at_price: 6900
+    available: false
+    inventory_quantity: 0
+    option1: brown
+    option2: medium
+    option3:
+  - &product-8-var-3
+    id: 22
+    title: brown / large
+    price: 5900
+    weight: 400
+    compare_at_price: 6900
+    available: true
+    inventory_quantity: 10
+    option1: brown
+    option2: large
+    option3:
+  - &product-8-var-4
+    id: 23
+    title: black / small
+    price: 5900
+    weight: 400
+    compare_at_price: 6900
+    available: true
+    inventory_quantity: 10
+    option1: black
+    option2: small
+    option3:
+  - &product-8-var-5
+    id: 24
+    title: black / medium
+    price: 5900
+    weight: 400
+    compare_at_price: 6900
+    available: true
+    inventory_quantity: 10
+    option1: black
+    option2: medium
+    option3:
+  - &product-8-var-6
+    id: 25
+    title: black / large
+    price: 5900
+    weight: 400
+    compare_at_price: 6900
+    available: false
+    inventory_quantity: 0
+    option1: black
+    option2: large
+    option3:
+  - &product-9-var-1
+    id: 26
+    title: Body Only
+    price: 499995
+    weight: 2000
+    compare_at_price:
+    available: true
+    inventory_quantity: 3
+    option1: Body Only
+    option2:
+    option3:
+  - &product-9-var-2
+    id: 27
+    title: Kit with 18-55mm VR lens
+    price: 523995
+    weight: 2000
+    compare_at_price:
+    available: true
+    inventory_quantity: 2
+    option1: Kit with 18-55mm VR lens
+    option2:
+    option3:
+  - &product-9-var-3
+    id: 28
+    title: Kit with 18-200 VR lens
+    price: 552500
+    weight: 2000
+    compare_at_price:
+    available: true
+    inventory_quantity: 3
+    option1: Kit with 18-200 VR lens
+    option2:
+    option3:
+
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+#   Products
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+products:
+  - &product-1
+    id: 1
+    title: Arbor Draft
+    handle: arbor-draft
+    type: Snowboards
+    vendor: Arbor
+    price: 23900
+    price_max: 31900
+    price_min: 23900
+    price_varies: true
+    available: true
+    tags:
+      - season2005
+      - pro
+      - intermediate
+      - wooden
+      - freestyle
+    options:
+      - Length
+      - Style
+    compare_at_price: 49900
+    compare_at_price_max: 50900
+    compare_at_price_min: 49900
+    compare_at_price_varies: true
+    url: /products/arbor-draft
+    featured_image: products/arbor_draft.jpg
+    images:
+      - products/arbor_draft.jpg
+    description:
+      The Arbor Draft snowboard wouldn't exist if Polynesians hadn't figured out how to surf hundreds of years ago. But the Draft does exist, and it's here to bring your urban and park riding to a new level. The board's freaky Tiki design pays homage to culture that inspired snowboarding. It's designed to spin with ease, land smoothly, lock hook-free onto rails, and take the abuse of a pavement pounding or twelve. The Draft will pop off kickers with authority and carve solidly across the pipe. The Draft features targeted Koa wood die cuts inlayed into the deck that enhance the flex pattern. Now bow down to riding's ancestors.
+    variants:
+      - *product-1-var-1
+      - *product-1-var-2
+      - *product-1-var-3
+  - &product-2
+    id: 2
+    title: Arbor Element
+    handle: arbor-element
+    type: Snowboards
+    vendor: Arbor
+    price: 29900
+    price_max: 29900
+    price_min: 29900
+    price_varies: false
+    available: true
+    tags:
+      - season2005
+      - pro
+      - wooden
+      - freestyle
+    options:
+      - Length
+    compare_at_price: 52900
+    compare_at_price_max: 52900
+    compare_at_price_min: 52900
+    compare_at_price_varies: false
+    url: /products/arbor-element
+    featured_image: products/element58.jpg
+    images:
+      - products/element58.jpg
+    description:
+      The Element is a technically advanced all-mountain board for riders who readily transition from one terrain, snow condition, or riding style to another. Its balanced design provides the versatility needed for the true ride-it-all experience. The Element is exceedingly lively, freely initiates, and holds a tight edge at speed. Its structural real-wood topsheet is made with book-matched Koa.
+    variants:
+      - *product-2-var-1
+
+  - &product-3
+    id: 3
+    title: Comic ~ Pastel
+    handle: comic-pastel
+    type: Snowboards
+    vendor: Technine
+    price: 19900
+    price_max: 22900
+    price_min: 19900
+    tags:
+      - season2006
+      - beginner
+      - intermediate
+      - freestyle
+      - purple
+    options:
+      - Length
+    price_varies: true
+    available: true
+    compare_at_price:
+    compare_at_price_max: 0
+    compare_at_price_min: 0
+    compare_at_price_varies: false
+    url: /products/comic-pastel
+    featured_image: products/technine1.jpg
+    images:
+      - products/technine1.jpg
+      - products/technine2.jpg
+      - products/technine_detail.jpg
+    description:
+      2005 Technine Comic Series Description The Comic series was developed to be the ultimate progressive freestyle board in the Technine line. Dependable edge control and a perfect flex pattern for jumping in the park or out of bounds. Landins and progression will come easy with this board and it will help your riding progress to the next level. Street rails, park jibs, backcountry booters and park jumps, this board will do it all.
+    variants:
+      - *product-3-var-1
+      - *product-3-var-2
+      - *product-3-var-3
+
+  - &product-4
+    id: 4
+    title: Comic ~ Orange
+    handle: comic-orange
+    type: Snowboards
+    vendor: Technine
+    price: 19900
+    price_max: 19900
+    price_min: 19900
+    price_varies: false
+    available: true
+    tags:
+      - season2006
+      - beginner
+      - intermediate
+      - freestyle
+      - orange
+    options:
+      - Length
+    compare_at_price: 32900
+    compare_at_price_max: 32900
+    compare_at_price_min: 32900
+    compare_at_price_varies: false
+    url: /products/comic-orange
+    featured_image: products/technine3.jpg
+    images:
+      - products/technine3.jpg
+      - products/technine4.jpg
+    description:
+      2005 Technine Comic Series Description The Comic series was developed to be the ultimate progressive freestyle board in the Technine line. Dependable edge control and a perfect flex pattern for jumping in the park or out of bounds. Landins and progression will come easy with this board and it will help your riding progress to the next level. Street rails, park jibs, backcountry booters and park jumps, this board will do it all.
+    variants:
+      - *product-4-var-1
+
+  - &product-5
+    id: 5
+    title: Burton Boots
+    handle: burton-boots
+    type: Boots
+    vendor: Burton
+    price: 11900
+    price_max: 11900
+    price_min: 11900
+    price_varies: false
+    available: true
+    tags:
+      - season2006
+      - beginner
+      - intermediate
+      - boots
+    options:
+      - Color
+      - Shoe Size
+    compare_at_price: 22900
+    compare_at_price_max: 22900
+    compare_at_price_min: 22900
+    compare_at_price_varies: false
+    url: /products/burton-boots
+    featured_image: products/burton.jpg
+    images:
+      - products/burton.jpg
+    description:
+      The Burton boots are particularly well on snowboards. The very best thing about them is that the according picture is cubic. This makes testing in a Vision testing environment very easy.
+    variants:
+      - *product-5-var-1
+      - *product-5-var-2
+      - *product-5-var-3
+      - *product-5-var-4
+      - *product-5-var-5
+      - *product-5-var-6
+
+  - &product-6
+    id: 6
+    title: Superbike 1198 S
+    handle: superbike
+    type: Superbike
+    vendor: Ducati
+    price: 2179500
+    price_max: 2179500
+    price_min: 2179500
+    price_varies: false
+    available: true
+    tags:
+      - ducati
+      - superbike
+      - bike
+      - street
+      - racing
+      - performance
+    options:
+      - Color
+    compare_at_price:
+    compare_at_price_max: 0
+    compare_at_price_min: 0
+    compare_at_price_varies: false
+    url: /products/superbike
+    featured_image: products/ducati.jpg
+    images:
+      - products/ducati.jpg
+    description:
+      <h3>‘S’ PERFORMANCE</h3>
+      <p>Producing 170hp (125kW) and with a dry weight of just 169kg (372.6lb), the new 1198 S now incorporates more World Superbike technology than ever before by taking the 1198 motor and adding top-of-the-range suspension, lightweight chassis components and a true racing-style traction control system designed for road use.</p>
+      <p>The high performance, fully adjustable 43mm Öhlins forks, which sport low friction titanium nitride-treated fork sliders, respond effortlessly to every imperfection in the tarmac. Beyond their advanced engineering solutions, one of the most important characteristics of Öhlins forks is their ability to communicate the condition and quality of the tyre-to-road contact patch, a feature that puts every rider in superior control. The suspension set-up at the rear is complemented with a fully adjustable Öhlins rear shock equipped with a ride enhancing top-out spring and mounted to a single-sided swingarm for outstanding drive and traction. The front-to-rear Öhlins package is completed with a control-enhancing adjustable steering damper.</p>
+    variants:
+      - *product-6-var-1
+
+  - &product-7
+    id: 7
+    title: Shopify Shirt
+    handle: shopify-shirt
+    type: Shirt
+    vendor: Shopify
+    price: 1900
+    price_max: 1900
+    price_min: 1900
+    price_varies: false
+    available: true
+    tags:
+      - shopify
+      - shirt
+      - apparel
+      - tshirt
+      - clothing
+    options:
+      - Color
+      - Size
+    compare_at_price:
+    compare_at_price_max: 0
+    compare_at_price_min: 0
+    compare_at_price_varies: false
+    url: /products/shopify-shirt
+    featured_image: products/shopify_shirt.png
+    images:
+      - products/shopify_shirt.png
+    description:
+      <p>High Quality Shopify Shirt. Wear your e-commerce solution with pride and attract attention anywhere you go.</p>
+      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
+    variants:
+      - *product-7-var-1
+      - *product-7-var-2
+      - *product-7-var-3
+      - *product-7-var-4
+
+  - &product-8
+    id: 8
+    title: Hooded Sweater
+    handle: hooded-sweater
+    type: Sweater
+    vendor: Stormtech
+    price: 5900
+    price_max: 5900
+    price_min: 5900
+    price_varies: false
+    available: true
+    tags:
+      - sweater
+      - hooded
+      - apparel
+      - clothing
+    options:
+      - Color
+      - Size
+    compare_at_price: 6900
+    compare_at_price_max: 6900
+    compare_at_price_min: 6900
+    compare_at_price_varies: false
+    url: /products/hooded-sweater
+    featured_image: products/hooded-sweater.jpg
+    images:
+      - products/hooded-sweater.jpg
+      - products/hooded-sweater-b.jpg
+    description:
+      <p>Extra comfortable zip up sweater. Durable quality, ideal for any outdoor activities.</p>
+      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
+    variants:
+      - *product-8-var-1
+      - *product-8-var-2
+      - *product-8-var-3
+      - *product-8-var-4
+      - *product-8-var-5
+      - *product-8-var-6
+
+  - &product-9
+    id: 9
+    title: D3 Digital SLR Camera
+    handle: d3
+    type: SLR
+    vendor: Nikon
+    price: 499995
+    price_max: 552500
+    price_min: 499995
+    price_varies: true
+    available: true
+    tags:
+      - camera
+      - slr
+      - nikon
+      - professional
+    options:
+      - Bundle
+    compare_at_price:
+    compare_at_price_max: 0
+    compare_at_price_min: 0
+    compare_at_price_varies: false
+    url: /products/d3
+    featured_image: products/d3.jpg
+    images:
+      - products/d3.jpg
+      - products/d3_2.jpg
+      - products/d3_3.jpg
+    description:
+      <p>Flagship pro D-SLR with a 12.1-MP FX-format CMOS sensor, blazing 9 fps shooting at full FX resolution and low-noise performance up to 6400 ISO.</p>
+      <p><strong>Nikon's original 12.1-megapixel FX-format (23.9 x 36mm) CMOS sensor:</strong> Couple Nikon's exclusive digital image processing system with the 12.1-megapixel FX-format and you'll get breathtakingly rich images while also reducing noise to unprecedented levels with even higher ISOs.</p>
+      <p><strong>Continuous shooting at up to 9 frames per second:</strong> At full FX resolution and up to 11fps in the DX crop mode, the D3 offers uncompromised shooting speeds for fast-action and sports photography.</p>
+    variants:
+      - *product-9-var-1
+      - *product-9-var-2
+      - *product-9-var-3
+
+
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+#   Line Items
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+line_items:
+  - &line_item-1
+    id: 1
+    title: 'Arbor Draft'
+    subtitle: '151cm'
+    price: 29900
+    line_price: 29900
+    quantity: 1
+    variant: *product-1-var-1
+    product: *product-1
+
+  - &line_item-2
+    id: 2
+    title: 'Comic ~ Orange'
+    subtitle: '159cm'
+    price: 19900
+    line_price: 39800
+    quantity: 2
+    variant: *product-4-var-1
+    product: *product-4
+
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+#   Link Lists
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+links:
+  - &link-1
+    id: 1
+    title: Our Sale
+    url: /collections/sale
+  - &link-2
+    id: 2
+    title: Arbor Stuff
+    url: /collections/arbor
+  - &link-3
+    id: 3
+    title: All our Snowboards
+    url: /collections/snowboards
+  - &link-4
+    id: 4
+    title: Powered by Shopify
+    url: 'http://shopify.com'
+  - &link-5
+    id: 5
+    title: About Us
+    url: /pages/about-us
+  - &link-6
+    id: 6
+    title: Policies
+    url: /pages/shipping
+  - &link-7
+    id: 7
+    title: Contact Us
+    url: /pages/contact
+  - &link-8
+    id: 8
+    title: Our blog
+    url: /blogs/bigcheese-blog
+  - &link-9
+    id: 9
+    title: New Boots
+    url: /products/burton-boots
+  - &link-10
+    id: 10
+    title: Paginated Sale
+    url: /collections/paginated-sale
+  - &link-11
+    id: 11
+    title: Our Paginated blog
+    url: /blogs/paginated-blog
+  - &link-12
+    id: 12
+    title: Catalog
+    url: /collections/all
+
+
+
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+#   Link Lists
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+link_lists:
+  - &link-list-1
+    id: 1
+    title: 'Main Menu'
+    handle: 'main-menu'
+    links:
+      - *link-12
+      - *link-5
+      - *link-7
+      - *link-8
+  - &link-list-2
+    id: 1
+    title: 'Footer Menu'
+    handle: 'footer'
+    links:
+      - *link-5
+      - *link-6
+
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+#   Collections
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+
+collections:
+  - &collection-1
+    id: 1
+    title: Frontpage
+    handle: frontpage
+    url: /collections/frontpage
+    products:
+      - *product-7
+      - *product-8
+      - *product-9
+
+  - &collection-2
+    id: 2
+    title: Arbor
+    handle: arbor
+    url: /collections/arbor
+    products:
+      - *product-1
+      - *product-2
+
+  - &collection-3
+    id: 3
+    title: Snowboards
+    handle: snowboards
+    url: /collections/snowboards
+    description:
+      <p>This is a description for my <strong>Snowboards</strong> collection.</p>
+    products:
+      - *product-1
+      - *product-2
+      - *product-3
+      - *product-4
+
+  - &collection-4
+    id: 4
+    title: Items On Sale
+    handle: sale
+    url: /collections/sale
+    products:
+      - *product-1
+
+  - &collection-5
+    id: 5
+    title: Paginated Sale
+    handle: 'paginated-sale'
+    url: '/collections/paginated-sale'
+    products:
+      - *product-1
+      - *product-2
+      - *product-3
+      - *product-4
+    products_count: 210
+
+  - &collection-6
+    id: 6
+    title: All products
+    handle: 'all'
+    url: '/collections/all'
+    products:
+      - *product-7
+      - *product-8
+      - *product-9
+      - *product-6
+      - *product-1
+      - *product-2
+      - *product-3
+      - *product-4
+      - *product-5
+
+
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+#   Pages and Blogs
+# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
+pages:
+  - &page-2
+    id: 1
+    title: Contact Us
+    handle: contact
+    url: /pages/contact
+    author: Tobi
+    content:
+      "<p>You can contact us via phone under (555) 567-2222.</p>
+      <p>Our retail store is located at <em>Rue d'Avignon 32, Avignon (Provence)</em>.</p>
+      <p><strong>Opening Hours:</strong><br />Monday through Friday: 9am - 6pm<br />Saturday: 10am - 3pm<br />Sunday: closed</p>"
+    created_at: 2005-04-04 12:00
+
+  - &page-3
+    id: 2
+    title: About Us
+    handle: about-us
+    url: /pages/about-us
+    author: Tobi
+    content:
+      "<p>Our company was founded in 1894 and we are since operating out of Avignon from the beautiful Provence.</p>
+      <p>We offer the highest quality products and are proud to serve our customers to their heart's content.</p>"
+    created_at: 2005-04-04 12:00
+
+  - &page-4
+    id: 3
+    title: Shopping Cart
+    handle: shopping-cart
+    url: /pages/shopping-cart
+    author: Tobi
+    content: "<ul><li>Your order is safe with us. Our checkout uses industry standard security to protect your information.</li><li>Your order will be billed immediately upon checkout.</li><li><b>ALL SALES ARE FINAL:</b> Defective or damaged product will be exchanged</li><li>All orders are processed expediently: usually in under 24 hours.</li></ul>"
+    created_at: 2005-04-04 12:00
+
+  - &page-5
+    id: 4
+    title: Shipping and Handling
+    handle: shipping
+    url: /pages/shipping
+    author: Tobi
+    content: <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
+    created_at: 2005-04-04 12:00
+
+  - &page-6
+    id: 5
+    title: Frontpage
+    handle: frontpage
+    url: /pages/frontpage
+    author: Tobi
+    content: <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
+    created_at: 2005-04-04 12:00
+
+blogs:
+  - id: 1
+    handle: news
+    title: News
+    url: /blogs/news
+    articles:
+      - id: 3
+        title: 'Welcome to the new Foo Shop'
+        author: Daniel
+        content: <p><strong>Welcome to your Shopify store! The jaded Pixel crew is really glad you decided to take Shopify for a spin.</strong></p><p>To help you get you started with Shopify, here are a couple of tips regarding what you see on this page.</p><p>The text you see here is an article. To edit this article, create new articles or create new pages you can go to the <a href="/admin/pages">Blogs &amp; Pages</a> tab of the administration menu.</p><p>The Shopify t-shirt above is a product and selling products is what Shopify is all about. To edit this product, or create new products you can go to the <a href="/admin/products">Products Tab</a> in of the administration menu.</p><p>While you're looking around be sure to check out the <a href="/admin/collections">Collections</a> and <a href="/admin/links">Navigations</a> tabs and soon you will be well on your way to populating your site.</p><p>And of course don't forget to browse the <a href="admin/design/appearance/themes">theme gallery</a> to pick a new look for your shop!</p><p><strong>Shopify is in beta</strong><br />If you would like to make comments or suggestions please visit us in the <a href="http://forums.shopify.com/community">Shopify Forums</a> or drop us an <a href="mailto:feedback@shopify.com">email</a>.</p>
+        created_at: 2005-04-04 16:00
+      - id: 4
+        title: 'Breaking News: Restock on all sales products'
+        author: Tobi
+        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+        created_at: 2005-04-04 12:00
+    articles_count: 2
+
+  - id: 2
+    handle: bigcheese-blog
+    title: Bigcheese blog
+    url: /blogs/bigcheese-blog
+    articles:
+      - id: 1
+        title: 'One thing you probably did not know yet...'
+        author: Justin
+        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+        created_at: 2005-04-04 16:00
+        comments:
+          -
+            id: 1
+            author: John Smith
+            email: john@smith.com
+            content: Wow...great article man.
+            status: published
+            created_at: 2009-01-01 12:00
+            updated_at: 2009-02-01 12:00
+            url: ""
+          -
+            id: 2
+            author: John Jones
+            email: john@jones.com
+            content: I really enjoyed this article. And I love your shop! It's awesome. Shopify rocks!
+            status: published
+            created_at: 2009-03-01 12:00
+            updated_at: 2009-02-01 12:00
+            url: "http://somesite.com/"
+      - id: 2
+        title: Fascinating
+        author: Tobi
+        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+        created_at: 2005-04-06 12:00
+        comments:
+    articles_count: 2
+    comments_enabled?: true
+    comment_post_url: ""
+    comments_count: 2
+    moderated?: true
+
+  - id: 3
+    handle: paginated-blog
+    title: Paginated blog
+    url: /blogs/paginated-blog
+    articles:
+      - id: 6
+        title: 'One thing you probably did not know yet...'
+        author: Justin
+        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+        created_at: 2005-04-04 16:00
+
+      - id: 7
+        title: Fascinating
+        author: Tobi
+        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
+        created_at: 2005-04-06 12:00
+    articles_count: 200

performance/shopify/weight_filter.rb

@@ -0,0 +1,9 @@
+module WeightFilter
+  def weight(grams)
+    sprintf("%.2f", grams / 1000)
+  end
+
+  def weight_with_unit(grams)
+    "#{weight(grams)} kg"
+  end
+end

performance/tests/dropify/article.liquid

@@ -0,0 +1,74 @@
+<div class="article">
+  <h2 class="article-title">{{ article.title }}</h2>
+  <p class="article-details">posted <span class="article-time">{{ article.created_at | date: "%Y %h" }}</span> by <span class="article-author">{{ article.author }}</span></p>
+
+  <div class="article-body textile">
+    {{ article.content }}
+  </div>
+
+</div>
+
+<!-- Comments -->
+{% if blog.comments_enabled? %}
+<div id="comments">
+  <h3>Comments</h3>
+
+  <!-- List all comments -->
+  <ul id="comment-list">
+  {% for comment in article.comments %}
+    <li>
+      <div class="comment-details">
+        <span class="comment-author">{{ comment.author }}</span> said on <span class="comment-date">{{ comment.created_at | date: "%B %d, %Y" }}</span>:
+      </div>
+
+      <div class="comment">
+        {{ comment.content }}
+      </div>
+    </li>
+  {% endfor %}
+  </ul>
+
+  <!-- Comment Form -->
+  <div id="comment-form">
+  {% form article %}
+    <h3>Leave a comment</h3>
+
+    <!-- Check if a comment has been submitted in the last request, and if yes display an appropriate message -->
+    {% if form.posted_successfully? %}
+      {% if blog.moderated? %}
+        <div class="notice">
+          Successfully posted your comment.<br />
+          It will have to be approved by the blog owner first before showing up.
+        </div>
+      {% else %}
+        <div class="notice">Successfully posted your comment.</div>
+      {% endif %}
+    {% endif %}
+
+    {% if form.errors %}
+      <div class="notice error">Not all the fields have been filled out correctly!</div>
+    {% endif %}
+
+    <dl>
+      <dt class="{% if form.errors contains 'author' %}error{% endif %}"><label for="comment_author">Your name</label></dt>
+      <dd><input type="text" id="comment_author" name="comment[author]" size="40" value="{{form.author}}" class="{% if form.errors contains 'author' %}input-error{% endif %}" /></dd>
+
+      <dt class="{% if form.errors contains 'email' %}error{% endif %}"><label for="comment_email">Your email</label></dt>
+      <dd><input type="text" id="comment_email" name="comment[email]" size="40" value="{{form.email}}" class="{% if form.errors contains 'email' %}input-error{% endif %}" /></dd>
+
+      <dt class="{% if form.errors contains 'body' %}error{% endif %}"><label for="comment_body">Your comment</label></dt>
+      <dd><textarea id="comment_body" name="comment[body]" cols="40" rows="5" class="{% if form.errors contains 'body' %}input-error{% endif %}">{{form.body}}</textarea></dd>
+    </dl>
+
+    {% if blog.moderated? %}
+      <p class="hint">comments have to be approved before showing up</p>
+    {% endif %}
+
+    <input type="submit" value="Post comment" id="comment-submit" />
+  {% endform %}
+  </div>
+  <!-- END Comment Form -->
+
+</div>
+{% endif %}
+<!-- END Comments -->

performance/tests/dropify/blog.liquid

@@ -0,0 +1,33 @@
+<div id="page">
+  <h2>{{page.title}}</h2>
+
+  {% paginate blog.articles by 20 %}
+
+    {% for article in blog.articles  %}
+
+    <div class="article">
+      <div class="headline">
+      <h3 class="title">
+        <a href="{{article.url}}">{{ article.title }}</a>
+      </h3>
+      <h4 class="date">Posted on {{ article.created_at | date: "%B %d, '%y" }} by {{ article.author }}.</h4>
+      </div>
+
+      <div class="article-body textile">
+        {{ article.content | strip_html | truncate: 250 }}
+      </div>
+
+      {% if blog.comments_enabled? %}
+        <p style="text-align: right"><a href="{{article.url}}#comments">{{ article.comments_count }} comments</a></p>
+      {% endif %}
+    </div>
+
+    {% endfor %}
+
+    <div id="pagination">
+      {{ paginate | default_pagination }}
+    </div>
+
+  {% endpaginate %}
+
+</div>

performance/tests/dropify/cart.liquid

@@ -0,0 +1,66 @@
+<script type="text/javascript">
+  function remove_item(id) {
+      document.getElementById('updates_'+id).value = 0;
+      document.getElementById('cartform').submit();
+  }
+</script>
+
+<div>
+
+  {% if cart.item_count == 0 %}
+    <h4>Your shopping cart is looking rather empty...</h4>
+  {% else %}
+  <form action="/cart" method="post" id="cartform">
+
+  <div id="cart">
+
+  <h3>You have {{ cart.item_count }} {{ cart.item_count | pluralize: 'product', 'products' }} in here!</h3>
+
+    <ul id="line-items">
+      {% for item in cart.items %}
+      <li id="item-{{item.id}}" class="clearfix">
+        <div class="thumb">
+          <div class="prodimage">
+          <a href="{{item.product.url}}" title="View {{item.title}} Page"><img src="{{item.product.featured_image | product_img_url: 'thumb' }}" alt="{{item.title | escape }}" /></a>
+        </div></div>
+        <h3 style="padding-right: 150px">
+      <a href="{{item.product.url}}" title="View {{item.title | escape }} Page">
+        {{ item.title }}
+        {% if item.variant.available == true %}
+           ({{item.variant.title}})
+        {% endif %}
+      </a>
+    </h3>
+        <small class="itemcost">Costs {{ item.price | money }} each, <span class="money">{{item.line_price | money }}</span> total.</small>
+        <p class="right">
+          <label for="updates">How many? </label>
+          <input type="text" size="4" name="updates[{{item.variant.id}}]" id="updates_{{item.variant.id}}" value="{{item.quantity}}" onfocus="this.select();"/><br />
+          <a href="#" onclick="remove_item({{item.variant.id}}); return false;" class="remove"><img style="padding:15px 0 0 0;margin:0;" src="{{ 'delete.gif' | asset_url }}" /></a>
+        </p>
+      </li>
+      {% endfor %}
+      <li id="total">
+        <input type="image" id="update-cart" name="update" value="Update My Cart" src="{{ 'update.gif' | asset_url }}" />
+        Subtotal:
+        <span class="money">{{ cart.total_price | money_with_currency }}</span>
+      </li>
+    </ul>
+
+  </div>
+
+    <div class="info">
+    <input type="image" value="Checkout!" name="checkout" src="{{ 'checkout.gif' | asset_url }}" />
+    </div>
+
+    {% if additional_checkout_buttons %}
+    <div class="additional-checkout-buttons">
+      <p>- or -</p>
+      {{ content_for_additional_checkout_buttons }}
+    </div>
+    {% endif %}
+
+  </form>
+
+  {% endif %}
+
+</div>

performance/tests/dropify/collection.liquid

@@ -0,0 +1,22 @@
+{% paginate collection.products by 20 %}
+
+<ul id="product-collection">
+    {% for product in collection.products %}
+    <li class="singleproduct clearfix">
+      <div class="small">
+        <div class="prodimage"><a href="{{product.url}}"><img src="{{ product.featured_image | product_img_url: 'small' }}" /></a></div>
+      </div>
+      <div class="description">
+        <h3><a href="{{product.url}}">{{product.title}}</a></h3>
+        <p>{{ product.description | strip_html | truncatewords: 35 }}</p>
+      <p class="money">{{ product.price_min | money }}{% if product.price_varies %} - {{ product.price_max | money }}{% endif %}</p>
+     </div>
+    </li>
+    {% endfor %}
+</ul>
+
+<div id="pagination">
+  {{ paginate | default_pagination }}
+</div>
+
+{% endpaginate %}

performance/tests/dropify/index.liquid

@@ -0,0 +1,47 @@
+<div id="frontproducts"><div id="frontproducts-top"><div id="frontproducts-bottom">
+<h2 style="display: none;">Featured Items</h2>
+{% for product in collections.frontpage.products limit:1 offset:0 %}
+  <div class="productmain">
+   <a href="{{ product.url }}"><img src="{{ product.featured_image | product_img_url: 'small' }}" alt="{{ product.title | escape }}" /></a>
+   <h3><a href="{{ product.url }}">{{ product.title }}</a></h3>
+   <div class="description">{{ product.description | strip_html | truncatewords: 18 }}</div>
+  <p class="money">{{ product.price_min | money }}</p>
+  </div>
+{% endfor %}
+{% for product in collections.frontpage.products offset:1 %}
+  <div class="product">
+   <a href="{{ product.url }}"><img src="{{ product.featured_image | product_img_url: 'thumb' }}" alt="{{ product.title | escape }}" /></a>
+   <h3><a href="{{ product.url }}">{{ product.title }}</a></h3>
+     <p class="money">{{ product.price_min | money }}</p>
+  </div>
+{% endfor %}
+</div></div></div>
+
+<div id="mainarticle">
+  {% assign article = pages.frontpage %}
+
+  {% if article.content != "" %}
+    <h2>{{ article.title }}</h2>
+    <div class="article-body textile">
+      {{ article.content }}
+    </div>
+  {% else %}
+    <div class="article-body textile">
+    In <em>Admin &gt; Blogs &amp; Pages</em>, create a page with the handle <strong><code>frontpage</code></strong> and it will show up here.<br />
+    {{ "Learn more about handles" | link_to: "http://wiki.shopify.com/Handle" }}
+    </div>
+  {% endif %}
+
+</div>
+<br style="clear: both;" />
+<div id="articles">
+  {% for article in blogs.news.articles offset:1  %}
+    <div class="article">
+    <h2>{{ article.title }}</h2>
+    <div class="article-body textile">
+      {{ article.content }}
+    </div>
+  </div>
+  {% endfor %}
+</div>
+

performance/tests/dropify/page.liquid

@@ -0,0 +1,8 @@
+<div id="page">
+  <h2>{{page.title}}</h2>
+
+  <div class="article textile">
+    {{page.content}}
+  </div>
+
+</div>

performance/tests/dropify/product.liquid

@@ -0,0 +1,68 @@
+<div id="productpage">
+
+  <div id="productimages"><div id="productimages-top"><div id="productimages-bottom">
+    {% for image in product.images %}
+      {% if forloop.first %}
+        <a href="{{ image | product_img_url: 'large' }}" class="productimage" rel="lightbox">
+          <img src="{{ image | product_img_url: 'medium'}}" alt="{{product.title | escape }}" />
+        </a>
+      {% else %}
+        <a href="{{ image | product_img_url: 'large' }}" class="productimage-small" rel="lightbox">
+          <img src="{{ image | product_img_url: 'small'}}" alt="{{product.title | escape }}" />
+        </a>
+      {% endif %}
+    {% endfor %}
+  </div></div></div>
+
+  <h2>{{ product.title }}</h2>
+
+  <ul id="details" class="hlist">
+    <li>Vendor: {{ product.vendor | link_to_vendor }}</li>
+    <li>Type: {{ product.type | link_to_type }}</li>
+  </ul>
+
+  <small>{{ product.price_min | money }}{% if product.price_varies %} - {{ product.price_max | money }}{% endif %}</small>
+
+  <div id="variant-add">
+    <form action="/cart/add" method="post">
+
+      <select id="variant-select" name="id" class="product-info-options">
+        {% for variant in product.variants %}
+          <option value="{{ variant.id }}">{{ variant.title }} - {{ variant.price | money }}</option>
+        {% endfor %}
+      </select>
+
+      <div id="price-field" class="price"></div>
+
+    <div style="text-align:center;"><input type="image" name="add" value="Add to Cart" id="add" src="{{ 'addtocart.gif' | asset_url }}" /></div>
+    </form>
+  </div>
+
+  <div class="description textile">
+    {{ product.description }}
+  </div>
+</div>
+
+<script type="text/javascript">
+<!--
+  // prototype callback for multi variants dropdown selector
+  var selectCallback = function(variant, selector) {
+    if (variant && variant.available == true) {
+      // selected a valid variant
+      $('add').removeClassName('disabled'); // remove unavailable class from add-to-cart button
+      $('add').disabled = false;           // reenable add-to-cart button
+      $('price-field').innerHTML = Shopify.formatMoney(variant.price, "{{shop.money_with_currency_format}}");  // update price field
+    } else {
+      // variant doesn't exist
+      $('add').addClassName('disabled');      // set add-to-cart button to unavailable class
+      $('add').disabled = true;              // disable add-to-cart button
+      $('price-field').innerHTML = (variant) ? "Sold Out" : "Unavailable"; // update price-field message
+    }
+  };
+
+  // initialize multi selector for product
+  Event.observe(document, 'dom:loaded', function() {
+    new Shopify.OptionSelectors("variant-select", { product: {{ product | json }}, onVariantSelected: selectCallback });
+  });
+-->
+</script>

performance/tests/dropify/theme.liquid

@@ -0,0 +1,105 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.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"/>
+  <title>{{shop.name}} - {{page_title}}</title>
+
+  {{ 'textile.css'  | global_asset_url | stylesheet_tag }}
+  {{ 'lightbox/v204/lightbox.css' | global_asset_url | stylesheet_tag }}
+
+  {{ 'prototype/1.6/prototype.js' | global_asset_url  | script_tag }}
+  {{ 'scriptaculous/1.8.2/scriptaculous.js' | global_asset_url  | script_tag }}
+  {{ 'lightbox/v204/lightbox.js'  | global_asset_url  | script_tag }}
+  {{ 'option_selection.js'        | shopify_asset_url | script_tag }}
+
+  {{ 'layout.css'   | asset_url | stylesheet_tag }}
+  {{ 'shop.js'      | asset_url | script_tag }}
+
+  {{ content_for_header }}
+</head>
+
+<body id="page-{{template}}">
+
+  <p class="hide"><a href="#rightsiders">Skip to navigation.</a></p>
+    <!-- mini cart -->
+        {% if cart.item_count > 0 %}
+      <div id="minicart" style="display:none;"><div id="minicart-inner">
+      <div id="minicart-items">
+      <h2>There {{ cart.item_count | pluralize: 'is', 'are' }} {{ cart.item_count }} {{ cart.item_count | pluralize: 'item', 'items' }} in <a href="/cart" title="View your cart">your cart</a>!</h2><h4 style="font-size: 16px; margin: 0 0 10px 0; padding: 0;">Your subtotal is {{ cart.total_price | money }}.</h4>
+        {% for item in cart.items %}
+        <div class="thumb">
+          <div class="prodimage"><a href="{{item.product.url}}" onMouseover="tooltip('{{ item.quantity }} x {{ item.title }} ({{ item.variant.title }})', 200)"; onMouseout="hidetooltip()"><img src="{{ item.product.featured_image | product_img_url: 'thumb' }}" /></a></div>
+        </div>
+        {% endfor %}
+        </div>
+       <br style="clear:both;" />
+      </div></div>
+        {% endif %}
+
+  <div id="container">
+    <div id="header">
+      <!-- Begin Header -->
+        <h1 id="logo"><a href="/" title="Go Home">{{shop.name}}</a></h1>
+      <div id="cartlinks">
+        {% if cart.item_count > 0 %}
+          <h2 id="cartcount"><a href="/cart" onMouseover="tooltip('There {{ cart.item_count | pluralize: 'is', 'are' }} {{ cart.item_count }} {{ cart.item_count | pluralize: 'item', 'items' }} in your cart!', 200)"; onMouseout="hidetooltip()">{{ cart.item_count }} {{ cart.item_count | pluralize: 'thing', 'things' }}!</a></h2>
+      <a href="/cart" id="minicartswitch" onclick="superSwitch(this, 'minicart', 'Close Mini Cart'); return false;" id="cartswitch">View Mini Cart ({{ cart.total_price | money }})</a>
+        {% endif %}
+      </div>
+      <!-- End Header -->
+
+    </div>
+  <hr />
+<div id="main">
+
+    <div id="content">
+    <div id="innercontent">
+      {{ content_for_layout }}
+      </div>
+    </div>
+
+  <hr />
+    <div id="rightsiders">
+
+      <ul class="rightlinks">
+        {% for link in linklists.main-menu.links %}
+           <li>{{ link.title | link_to: link.url }}</li>
+        {% endfor %}
+      </ul>
+
+        {% if tags %}
+        <ul class="rightlinks">
+          {% for tag in collection.tags %}
+            <li><span class="add-link">{{ '+' | link_to_add_tag: tag }}</span>{{ tag | highlight_active_tag | link_to_tag: tag }}</li>
+          {% endfor %}
+        </ul>
+        {% endif %}
+
+      <ul class="rightlinks">
+        {% for link in linklists.footer.links %}
+           <li>{{ link.title | link_to: link.url }}</li>
+        {% endfor %}
+      </ul>
+
+    </div>
+
+  <hr /><br style="clear:both;" />
+
+    <div id="footer">
+      <div class="footerinner">
+      All prices are in {{ shop.currency }}.
+      Powered by <a href="http://www.shopify.com" title="Shopify, Hosted E-Commerce">Shopify</a>.
+    </div>
+    </div>
+
+  </div>
+</div>
+
+<div id="tooltip"></div>
+<img id="pointer" src="{{ 'arrow2.gif' | asset_url }}" />
+
+</body>
+</html>
+

performance/tests/ripen/article.liquid

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+<div class="article">
+  <h2 class="article-title">{{ article.title }}</h2>
+  <p class="article-details">posted <span class="article-time">{{ article.created_at | date: "%Y %h" }}</span> by <span class="article-author">{{ article.author }}</span></p>
+
+  <div class="article-body textile">
+    {{ article.content }}
+  </div>
+
+</div>
+
+<!-- Comments -->
+{% if blog.comments_enabled? %}
+<div id="comments">
+  <h3>Comments</h3>
+
+  <!-- List all comments -->
+  <ul id="comment-list">
+  {% for comment in article.comments %}
+    <li>
+      <div class="comment">
+        {{ comment.content }}
+      </div>
+
+      <div class="comment-details">
+        Posted by {{ comment.author }} on {{ comment.created_at | date: "%B %d, %Y" }}
+      </div>
+    </li>
+  {% endfor %}
+  </ul>
+
+  <!-- Comment Form -->
+  <div id="comment-form">
+  {% form article %}
+    <h3>Leave a comment</h3>
+
+    <!-- Check if a comment has been submitted in the last request, and if yes display an appropriate message -->
+    {% if form.posted_successfully? %}
+      {% if blog.moderated? %}
+        <div class="notice">
+          Successfully posted your comment.<br />
+          It will have to be approved by the blog owner first before showing up.
+        </div>
+      {% else %}
+        <div class="notice">Successfully posted your comment.</div>
+      {% endif %}
+    {% endif %}
+
+    {% if form.errors %}
+      <div class="notice error">Not all the fields have been filled out correctly!</div>
+    {% endif %}
+
+    <dl>
+      <dt class="{% if form.errors contains 'author' %}error{% endif %}"><label for="comment_author">Your name</label></dt>
+      <dd><input type="text" id="comment_author" name="comment[author]" size="40" value="{{form.author}}" class="{% if form.errors contains 'author' %}input-error{% endif %}" /></dd>
+
+      <dt class="{% if form.errors contains 'email' %}error{% endif %}"><label for="comment_email">Your email</label></dt>
+      <dd><input type="text" id="comment_email" name="comment[email]" size="40" value="{{form.email}}" class="{% if form.errors contains 'email' %}input-error{% endif %}" /></dd>
+
+      <dt class="{% if form.errors contains 'body' %}error{% endif %}"><label for="comment_body">Your comment</label></dt>
+      <dd><textarea id="comment_body" name="comment[body]" cols="40" rows="5" class="{% if form.errors contains 'body' %}input-error{% endif %}">{{form.body}}</textarea></dd>
+    </dl>
+
+    {% if blog.moderated? %}
+      <p class="hint">comments have to be approved before showing up</p>
+    {% endif %}
+
+    <input type="submit" value="Post comment" id="comment-submit" />
+  {% endform %}
+  </div>
+  <!-- END Comment Form -->
+
+</div>
+{% endif %}
+<!-- END Comments -->

performance/tests/ripen/blog.liquid

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+<div id="blog-page">
+  <h2 class="heading-shaded">{{page.title}}</h2>
+   {% for article in blog.articles  %}
+      <h4>
+        {{ article.created_at | date: '%d %b' }}
+        <a href="{{article.url}}">{{ article.title }}</a>
+      </h4>
+      {{ article.content }}
+      {% if blog.comments_enabled? %}
+        <p><a href="{{article.url}}#comments">{{ article.comments_count }} comments</a></p>
+      {% endif %}
+  {% endfor %}
+</div>

performance/tests/ripen/cart.liquid

@@ -0,0 +1,54 @@
+<script type="text/javascript">
+  function remove_item(id) {
+      document.getElementById('updates_'+id).value = 0;
+      document.getElementById('cart').submit();
+  }
+</script>
+
+<div id="cart-page">
+
+  {% if cart.item_count == 0 %}
+    <p>Your shopping cart is empty...</p>
+  <p><a href="/"><img src="{{ 'continue_shopping_icon.gif' | asset_url }}" alt="Continue shopping"/></a><p>
+  {% else %}
+
+  <form action="/cart" method="post" id="cart">
+
+  <table class="cart">
+      <tr>
+        <th colspan="2">Product</th>
+        <th class="short">Qty</th>
+        <th>Price</th>
+        <th>Total</th>
+        <th class="short">Remove</th>
+      </tr>
+
+      {% for item in cart.items %}
+      <tr class="{% cycle 'odd', 'even' %}">
+        <td class="short">{{ item.product.featured_image |  product_img_url: 'thumb' | img_tag }}</td>
+    <td><a href="{{item.product.url}}">{{ item.title }}</a></td>
+        <td class="short"><input type="text" class="quantity" name="updates[{{item.variant.id}}]" id="updates_{{item.variant.id}}" value="{{item.quantity}}" onfocus="this.select();"/></td>
+        <td class="cart-price">{{ item.price | money }}</td>
+        <td class="cart-price">{{item.line_price | money }}</td>
+        <td class="short"><a href="#" onclick="remove_item({{item.variant.id}}); return false;" class="remove"><img src="{{ 'cancel_icon.gif' | asset_url }}" alt="Remove" /></a></td>
+      </tr>
+      {% endfor %}
+    </table>
+    <p class="updatebtn"><input type="image" value="Update Cart" name="update" src="{{ 'update_icon.gif' | asset_url }}" alt="Update" /></p>
+    <p class="subtotal">
+    <strong>Subtotal:</strong> {{cart.total_price | money_with_currency }}
+    </p>
+    <p class="checkout"><input type="image" src="{{ 'checkout_icon.gif' | asset_url }}" alt="Proceed to Checkout" value="Proceed to Checkout" name="checkout"  /></p>
+
+    {% if additional_checkout_buttons %}
+    <div class="additional-checkout-buttons">
+      <p>- or -</p>
+      {{ content_for_additional_checkout_buttons }}
+    </div>
+    {% endif %}
+
+  </form>
+
+  {% endif %}
+
+</div>

performance/tests/ripen/collection.liquid

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+<div id="collection-page">
+
+{% if collection.description %}
+  <div id="collection-description" class="textile">{{ collection.description }}</div>
+{% endif %}
+
+{% paginate collection.products by 20 %}
+
+<ul id="product-collection">
+    {% for product in collection.products %}
+    <li class="single-product clearfix">
+      <div class="small">
+        <div class="prod-image"><a href="{{product.url}}"><img src="{{ product.featured_image | product_img_url: 'small' }}" alt="{{ product.title | escape }}" /></a></div>
+      </div>
+      <div class="prod-list-description">
+        <h3><a href="{{product.url}}">{{product.title}}</a></h3>
+        <p>{{ product.description | strip_html | truncatewords: 35 }}</p>
+      <p class="prd-price">{{ product.price_min | money }}{% if product.price_varies %} - {{ product.price_max | money }}{% endif %}</p>
+     </div>
+    </li>
+    {% endfor %}
+</ul>
+
+<div id="pagination">
+  {{ paginate | default_pagination }}
+</div>
+
+{% endpaginate %}
+</div>

performance/tests/ripen/index.liquid

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+<div id="home-page">
+  <h3 class="heading-shaded">Featured products...</h3>
+  <div class="featured-prod-row clearfix">
+    {% for product in collections.frontpage.products %}
+      <div class="featured-prod-item">
+          <p>
+        <a href="{{product.url}}"><img src="{{ product.featured_image | product_img_url: 'small' }}" alt="{{ product.title | escape }}"/></a>
+        </p>
+        <h4><a href="{{product.url}}">{{product.title}}</a></h4>
+        {% if product.compare_at_price %}
+          {% if product.price_min != product.compare_at_price %}
+            <p class="prd-price">Was:<del>{{product.compare_at_price | money}}</del></p>
+            <p class="prd-price"><ins>Now: {{product.price_min | money}}</ins></p>
+          {% endif %}
+        {% else %}
+          <p class="prd-price"><ins>{{product.price_min | money}}</ins></p>
+        {% endif %}
+      </div>
+    {% endfor %}
+  </div>
+
+  <div id="articles">
+    {% assign article = pages.frontpage %}
+    {% if article.content != "" %}
+      <h3>{{ article.title }}</h3>
+      {{ article.content }}
+    {% else %}
+      In <em>Admin &gt; Blogs &amp; Pages</em>, create a page with the handle <strong><code>frontpage</code></strong> and it will show up here.<br />
+      {{ "Learn more about handles" | link_to: "http://wiki.shopify.com/Handle" }}
+    {% endif %}
+  </div>
+</div>

performance/tests/ripen/page.liquid

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+<div id="single-page">
+<h2 class="heading-shaded">{{page.title}}</h2>
+  {{ page.content }}
+</div>

performance/tests/ripen/product.liquid

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+<div id="product-page">
+  <h2 class="heading-shaded">{{ product.title }}</h2>
+  <div id="product-details">
+  <div id="product-images">
+    {% for image in product.images %}
+      {% if forloop.first %}
+        <a href="{{ image | product_img_url: 'large' }}" class="product-image" rel="lightbox[ product]" title="">
+          <img src="{{ image | product_img_url: 'medium'}}" alt="{{product.title | escape }}" />
+        </a>
+      {% else %}
+        <a href="{{ image | product_img_url: 'large' }}" class="product-image-small" rel="lightbox[ product]" title="">
+          <img src="{{ image | product_img_url: 'small'}}" alt="{{product.title | escape }}" />
+        </a>
+      {% endif %}
+    {% endfor %}
+  </div>
+
+  <ul id="product-info">
+    <li>Vendor: {{ product.vendor | link_to_vendor }}</li>
+    <li>Type: {{ product.type | link_to_type }}</li>
+    </ul>
+
+    <small>{{ product.price_min | money }}{% if product.price_varies %} - {{ product.price_max | money }}{% endif %}</small>
+
+    <div id="product-options">
+              {% if product.available %}
+
+    <form action="/cart/add" method="post">
+
+      <select id="product-select" name='id'>
+        {% for variant in product.variants %}
+          <option value="{{ variant.id }}">{{ variant.title }} - {{ variant.price | money }}</option>
+        {% endfor %}
+      </select>
+
+      <div id="price-field"></div>
+
+      <div class="add-to-cart"><input type="image" name="add" value="Add to Cart" id="add" src="{{ 'add-to-cart.gif' | asset_url }}" /></div>
+    </form>
+              {% else %}
+                  <span>Sold Out!</span>
+              {% endif %}
+    </div>
+
+    <div class="product-description">
+    {{ product.description }}
+    </div>
+  </div>
+</div>
+
+
+<script type="text/javascript">
+<!--
+  // mootools callback for multi variants dropdown selector
+  var selectCallback = function(variant, selector) {
+    if (variant && variant.available == true) {
+      // selected a valid variant
+      $('add').removeClass('disabled'); // remove unavailable class from add-to-cart button
+      $('add').disabled = false;           // reenable add-to-cart button
+      $('price-field').innerHTML = Shopify.formatMoney(variant.price, "{{shop.money_with_currency_format}}");  // update price field
+    } else {
+      // variant doesn't exist
+      $('add').addClass('disabled');      // set add-to-cart button to unavailable class
+      $('add').disabled = true;              // disable add-to-cart button
+      $('price-field').innerHTML = (variant) ? "Sold Out" : "Unavailable"; // update price-field message
+    }
+  };
+
+  // initialize multi selector for product
+  window.addEvent('domready', function() {
+    new Shopify.OptionSelectors("product-select", { product: {{ product | json }}, onVariantSelected: selectCallback });
+  });
+-->
+</script>
+

performance/tests/ripen/theme.liquid

@@ -0,0 +1,85 @@
+<!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" lang="en">
+<head>
+  <title>{{shop.name}} - {{page_title}}</title>
+  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+
+  {{ 'main.css'     | asset_url | stylesheet_tag }}
+  {{ 'shop.js'      | asset_url | script_tag }}
+
+  {{ 'mootools.js'         | asset_url         | script_tag }}
+  {{ 'slimbox.js'          | asset_url         | script_tag }}
+  {{ 'option_selection.js' | shopify_asset_url | script_tag }}
+  {{ 'slimbox.css'         | asset_url         | stylesheet_tag }}
+
+  {{ content_for_header }}
+ </head>
+
+<body id="page-{{template}}">
+<p class="hide"><a href="#navigation">Skip to navigation.</a></p>
+<div id="wrapper">
+  <div class="content clearfix">
+    <div id="header">
+      <h2><a href="/">{{shop.name}}</a></h2>
+    </div>
+    <div id="left-col">
+      {{ content_for_layout }}
+    </div>
+    <div id="right-col">
+      {% if template != 'cart' %}
+          <div id="cart-right-col">
+          <dl id="cart-right-col-info">
+            <dt>Shopping Cart</dt>
+            <dd>
+            {% if cart.item_count != 0 %}
+              <a href="/cart">{{ cart.item_count }} {{ cart.item_count | pluralize: 'item', 'items' }}</a> in your cart
+            {% else %}
+              Your cart is empty
+            {% endif %}
+            </dd>
+          </dl>
+        </div>
+      {% endif %}
+      <div id="search">
+        <dl id="searchbox">
+        <dt>Search</dt>
+        <dd>
+        <form action="/search" method="get">
+        <fieldset>
+        <input class="search-input" type="text" onclick="this.select()" value="Search this shop..." name="q" />
+        </fieldset>
+        </form>
+        </dd>
+        </dl>
+      </div>
+      <div id="navigation">
+        <dl class="navbar">
+        <dt>Navigation</dt>
+        {% for link in linklists.main-menu.links %}
+          <dd>{{ link.title | link_to: link.url }}</dd>
+        {% endfor %}
+        </dl>
+
+        {% if tags %}
+        <dl class="navbar">
+        <dt>Tags</dt>
+          {% for tag in collection.tags %}
+          <dd>{{ tag | highlight_active_tag | link_to_tag: tag }}</dd>
+          {% endfor %}
+          </dl>
+        {% endif %}
+      </div>
+    </div>
+
+  </div>
+    <div id="content-padding"></div>
+</div>
+
+<div id="footer">
+  {% for link in linklists.footer.links %}
+  {{ link.title | link_to: link.url }} {% if forloop.rindex != 1 %} | {% endif %}
+  {% endfor %}
+</div>
+
+</body>
+</html>