Use less.php instead of lesserphp

5 months ago · 0ebc1387f4
75 changed files with 11881 additions and 6180 deletions
--- a/README.md
+++ b/README.md
@ -87,7 +87,7 @@ This source code includes:

 * [phpqrcode](https://github.com/t0k4rt/phpqrcode) to generate QR codes
 * [Ubuntu font for the Web](https://github.com/earaujoassis/ubuntu-fontface)
-* [lesserphp](https://github.com/MarcusSchwarz/lesserphp) to compile [Less](http://lesscss.org)
+* [less.php](https://github.com/wikimedia/less.php) to compile [Less](http://lesscss.org)

 ## License

--- a/README_fr.md
+++ b/README_fr.md
@ -87,7 +87,7 @@ Ce code source inclus :

 * [phpqrcode](https://github.com/t0k4rt/phpqrcode) pour générer les codes QR
 * [La police Ubuntu pour le Web](https://github.com/earaujoassis/ubuntu-fontface)
-* [lesserphp](https://github.com/MarcusSchwarz/lesserphp) pour compiler le [Less](http://lesscss.org)
+* [less.php](https://github.com/wikimedia/less.php) pour compiler le [Less](http://lesscss.org)

 ## Licence

--- a/index.php
+++ b/index.php
@ -101,7 +101,7 @@ if (badQuery()) {
        // Then delete it
        unlink("temp/style.min.css");

-    require "lesserphp/lessc.inc.php";
+    require "less.php/lessc.inc.php";
    $less = new lessc;
    $less->setVariables($variablesTheme); // Make these colors available in style.less
    $less->setFormatter("compressed");
--- a/less.php/CHANGES.md
+++ b/less.php/CHANGES.md
@ -0,0 +1,70 @@
+# 3.1.0
+- [All Changes](https://github.com/wikimedia/less.php/compare/v3.0.0...v3.1.0)
+* PHP 8.0 support: Drop use of curly braces for sub-string eval (James D. Forrester)
+* Make `Directive::__construct` $rules arg optional (fix PHP 7.4 warning) (Sam Reed)
+* ProcessExtends: Improve performance by using a map for selectors and parents (Andrey Legayev)
+* build: Run CI tests on PHP 8.0 too (James D. Forrester)
+* code: Fix PSR12.Properties.ConstantVisibility.NotFound (Sam Reed)
+
+# 3.0.0
+- [All Changes](https://github.com/wikimedia/less.php/compare/v2.0.0...v3.0.0)
+- Raise PHP requirement from 7.1 to 7.2.9 (James Forrester)
+- build: Upgrade phpunit to ^8.5 and make pass  (James Forrester)
+- build: Install php-parallel-lint  (James Forrester)
+- build: Install minus-x and make pass  (James Forrester)
+
+# 2.0.0
+- [All Changes](https://github.com/wikimedia/less.php/compare/1.8.2...v2.0.0)
+- Relax PHP requirement down to 7.1, from 7.2.9 (Franz Liedke)
+- Reflect recent breaking changes properly with the semantic versioning (James Forrester)
+
+# 1.8.2
+- [All Changes](https://github.com/wikimedia/less.php/compare/1.8.1...1.8.2)
+- Require PHP 7.2.9+, up from 5.3+ (James Forrester)
+- Release: Update Version.php with the current release ID (COBadger)
+- Fix access array offset on value of type null (Michele Locati)
+- Fixed test suite on PHP 7.4 (Sergei Morozov)
+- docs: Fix 1.8.1 "All changes" link (Timo Tijhof)
+
+# 1.8.1
+- [All Changes](https://github.com/wikimedia/less.php/compare/v1.8.0...1.8.1)
+- Another PHP 7.3 compatibility tweak
+
+# 1.8.0
+- [All Changes](https://github.com/Asenar/less.php/compare/v1.7.0.13...v1.8.0)
+- Wikimedia fork
+- Supports up to PHP 7.3
+- No longer tested against PHP 5, though it's still remains allowed in `composer.json` for HHVM compatibility
+- Switched to [semantic versioning](https://semver.org/), hence version numbers now use 3 digits
+
+# 1.7.0.13
+ - [All Changes](https://github.com/Asenar/less.php/compare/v1.7.0.12...v1.7.0.13)
+ - Fix composer.json (PSR-4 was invalid)
+
+# 1.7.0.12
+ - [All Changes](https://github.com/Asenar/less.php/compare/v1.7.0.11...v1.7.0.12)
+ - set bin/lessc bit executable
+ - Add 'gettingVariables' method in Less_Parser
+
+# 1.7.0.11
+ - [All Changes](https://github.com/Asenar/less.php/compare/v1.7.0.10...v1.7.0.11)
+ - Fix realpath issue (windows)
+ - Set Less_Tree_Call property back to public ( Fix 258 266 267 issues from oyejorge/less.php)
+
+# 1.7.0.10
+
+ - [All Changes](https://github.com/oyejorge/less.php/compare/v1.7.0.9...v1.7.10)
+ - Add indentation option
+ - Add 'optional' modifier for @import
+ - fix $color in Exception messages
+ - don't use set_time_limit when running cli
+ - take relative-url into account when building the cache filename
+ - urlArgs should be string no array()
+ - add bug-report fixtures [#6dc898f](https://github.com/oyejorge/less.php/commit/6dc898f5d75b447464906bdf19d79c2e19d95e33)
+ - fix #269, missing on NameValue type [#a8dac63](https://github.com/oyejorge/less.php/commit/a8dac63d93fb941c54fb78b12588abf635747c1b)
+
+# 1.7.0.9
+
+ - [All Changes](https://github.com/oyejorge/less.php/compare/v1.7.0.8...v1.7.0.9)
+ - Remove space at beginning of Version.php
+ - Revert require() paths in test interface
--- a/less.php/LICENSE
+++ b/less.php/LICENSE
@ -0,0 +1,178 @@
+
+                              Apache License
+                        Version 2.0, January 2004
+                     http://www.apache.org/licenses/
+
+TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+1. Definitions.
+
+   "License" shall mean the terms and conditions for use, reproduction,
+   and distribution as defined by Sections 1 through 9 of this document.
+
+   "Licensor" shall mean the copyright owner or entity authorized by
+   the copyright owner that is granting the License.
+
+   "Legal Entity" shall mean the union of the acting entity and all
+   other entities that control, are controlled by, or are under common
+   control with that entity. For the purposes of this definition,
+   "control" means (i) the power, direct or indirect, to cause the
+   direction or management of such entity, whether by contract or
+   otherwise, or (ii) ownership of fifty percent (50%) or more of the
+   outstanding shares, or (iii) beneficial ownership of such entity.
+
+   "You" (or "Your") shall mean an individual or Legal Entity
+   exercising permissions granted by this License.
+
+   "Source" form shall mean the preferred form for making modifications,
+   including but not limited to software source code, documentation
+   source, and configuration files.
+
+   "Object" form shall mean any form resulting from mechanical
+   transformation or translation of a Source form, including but
+   not limited to compiled object code, generated documentation,
+   and conversions to other media types.
+
+   "Work" shall mean the work of authorship, whether in Source or
+   Object form, made available under the License, as indicated by a
+   copyright notice that is included in or attached to the work
+   (an example is provided in the Appendix below).
+
+   "Derivative Works" shall mean any work, whether in Source or Object
+   form, that is based on (or derived from) the Work and for which the
+   editorial revisions, annotations, elaborations, or other modifications
+   represent, as a whole, an original work of authorship. For the purposes
+   of this License, Derivative Works shall not include works that remain
+   separable from, or merely link (or bind by name) to the interfaces of,
+   the Work and Derivative Works thereof.
+
+   "Contribution" shall mean any work of authorship, including
+   the original version of the Work and any modifications or additions
+   to that Work or Derivative Works thereof, that is intentionally
+   submitted to Licensor for inclusion in the Work by the copyright owner
+   or by an individual or Legal Entity authorized to submit on behalf of
+   the copyright owner. For the purposes of this definition, "submitted"
+   means any form of electronic, verbal, or written communication sent
+   to the Licensor or its representatives, including but not limited to
+   communication on electronic mailing lists, source code control systems,
+   and issue tracking systems that are managed by, or on behalf of, the
+   Licensor for the purpose of discussing and improving the Work, but
+   excluding communication that is conspicuously marked or otherwise
+   designated in writing by the copyright owner as "Not a Contribution."
+
+   "Contributor" shall mean Licensor and any individual or Legal Entity
+   on behalf of whom a Contribution has been received by Licensor and
+   subsequently incorporated within the Work.
+
+2. Grant of Copyright License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   copyright license to reproduce, prepare Derivative Works of,
+   publicly display, publicly perform, sublicense, and distribute the
+   Work and such Derivative Works in Source or Object form.
+
+3. Grant of Patent License. Subject to the terms and conditions of
+   this License, each Contributor hereby grants to You a perpetual,
+   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+   (except as stated in this section) patent license to make, have made,
+   use, offer to sell, sell, import, and otherwise transfer the Work,
+   where such license applies only to those patent claims licensable
+   by such Contributor that are necessarily infringed by their
+   Contribution(s) alone or by combination of their Contribution(s)
+   with the Work to which such Contribution(s) was submitted. If You
+   institute patent litigation against any entity (including a
+   cross-claim or counterclaim in a lawsuit) alleging that the Work
+   or a Contribution incorporated within the Work constitutes direct
+   or contributory patent infringement, then any patent licenses
+   granted to You under this License for that Work shall terminate
+   as of the date such litigation is filed.
+
+4. Redistribution. You may reproduce and distribute copies of the
+   Work or Derivative Works thereof in any medium, with or without
+   modifications, and in Source or Object form, provided that You
+   meet the following conditions:
+
+   (a) You must give any other recipients of the Work or
+       Derivative Works a copy of this License; and
+
+   (b) You must cause any modified files to carry prominent notices
+       stating that You changed the files; and
+
+   (c) You must retain, in the Source form of any Derivative Works
+       that You distribute, all copyright, patent, trademark, and
+       attribution notices from the Source form of the Work,
+       excluding those notices that do not pertain to any part of
+       the Derivative Works; and
+
+   (d) If the Work includes a "NOTICE" text file as part of its
+       distribution, then any Derivative Works that You distribute must
+       include a readable copy of the attribution notices contained
+       within such NOTICE file, excluding those notices that do not
+       pertain to any part of the Derivative Works, in at least one
+       of the following places: within a NOTICE text file distributed
+       as part of the Derivative Works; within the Source form or
+       documentation, if provided along with the Derivative Works; or,
+       within a display generated by the Derivative Works, if and
+       wherever such third-party notices normally appear. The contents
+       of the NOTICE file are for informational purposes only and
+       do not modify the License. You may add Your own attribution
+       notices within Derivative Works that You distribute, alongside
+       or as an addendum to the NOTICE text from the Work, provided
+       that such additional attribution notices cannot be construed
+       as modifying the License.
+
+   You may add Your own copyright statement to Your modifications and
+   may provide additional or different license terms and conditions
+   for use, reproduction, or distribution of Your modifications, or
+   for any such Derivative Works as a whole, provided Your use,
+   reproduction, and distribution of the Work otherwise complies with
+   the conditions stated in this License.
+
+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
+   by You to the Licensor shall be under the terms and conditions of
+   this License, without any additional terms or conditions.
+   Notwithstanding the above, nothing herein shall supersede or modify
+   the terms of any separate license agreement you may have executed
+   with Licensor regarding such Contributions.
+
+6. Trademarks. This License does not grant permission to use the trade
+   names, trademarks, service marks, or product names of the Licensor,
+   except as required for reasonable and customary use in describing the
+   origin of the Work and reproducing the content of the NOTICE file.
+
+7. Disclaimer of Warranty. Unless required by applicable law or
+   agreed to in writing, Licensor provides the Work (and each
+   Contributor provides its Contributions) on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+   implied, including, without limitation, any warranties or conditions
+   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+   PARTICULAR PURPOSE. You are solely responsible for determining the
+   appropriateness of using or redistributing the Work and assume any
+   risks associated with Your exercise of permissions under this License.
+
+8. Limitation of Liability. In no event and under no legal theory,
+   whether in tort (including negligence), contract, or otherwise,
+   unless required by applicable law (such as deliberate and grossly
+   negligent acts) or agreed to in writing, shall any Contributor be
+   liable to You for damages, including any direct, indirect, special,
+   incidental, or consequential damages of any character arising as a
+   result of this License or out of the use or inability to use the
+   Work (including but not limited to damages for loss of goodwill,
+   work stoppage, computer failure or malfunction, or any and all
+   other commercial damages or losses), even if such Contributor
+   has been advised of the possibility of such damages.
+
+9. Accepting Warranty or Additional Liability. While redistributing
+   the Work or Derivative Works thereof, You may choose to offer,
+   and charge a fee for, acceptance of support, warranty, indemnity,
+   or other liability obligations and/or rights consistent with this
+   License. However, in accepting such obligations, You may act only
+   on Your own behalf and on Your sole responsibility, not on behalf
+   of any other Contributor, and only if You agree to indemnify,
+   defend, and hold each Contributor harmless for any liability
+   incurred by, or claims asserted against, such Contributor by reason
+   of your accepting any such warranty or additional liability.
+
+END OF TERMS AND CONDITIONS
+
--- a/less.php/README.md
+++ b/less.php/README.md
@ -0,0 +1,315 @@
+[![Continuous Integration](https://github.com/wikimedia/less.php/workflows/PHP%20Test/badge.svg)](https://github.com/wikimedia/less.php/actions)
+
+[Less.php](http://lessphp.typesettercms.com)
+========
+
+This is the Wikimedia fork of a PHP port of the official LESS processor <http://lesscss.org>.
+
+* [About](#about)
+* [Installation](#installation)
+* [Basic Use](#basic-use)
+* [Caching](#caching)
+* [Source Maps](#source-maps)
+* [Command Line](#command-line)
+* [Integration with other projects](#integration-with-other-projects)
+* [Transitioning from Leafo/lessphp](#transitioning-from-leafolessphp)
+* [Credits](#credits)
+
+
+
+About
+---
+The code structure of less.php mirrors that of the official processor which helps us ensure compatibility and allows for easy maintenance.
+
+Please note, there are a few unsupported LESS features:
+
+- Evaluation of JavaScript expressions within back-ticks (for obvious reasons).
+- Definition of custom functions.
+
+
+Installation
+---
+
+You can install the library with Composer or manually.
+
+#### Composer
+
+1. [Install Composer](https://getcomposer.org/download/)
+2. Run `composer require wikimedia/less.php`
+
+#### Manually From Release
+
+Step 1. [Download a release](https://github.com/wikimedia/less.php/releases) and upload the PHP files to your server.
+
+Step 2. Include the library:
+
+```php
+require_once '[path to less.php]/lib/Less/Autoloader.php';
+Less_Autoloader::register();
+```
+
+Basic Use
+---
+
+#### Parsing Strings
+
+```php
+$parser = new Less_Parser();
+$parser->parse( '@color: #4D926F; #header { color: @color; } h2 { color: @color; }' );
+$css = $parser->getCss();
+```
+
+
+#### Parsing LESS Files
+The parseFile() function takes two arguments:
+
+1. The absolute path of the .less file to be parsed
+2. The url root to prepend to any relative image or @import urls in the .less file.
+
+```php
+$parser = new Less_Parser();
+$parser->parseFile( '/var/www/mysite/bootstrap.less', 'http://example.com/mysite/' );
+$css = $parser->getCss();
+```
+
+
+#### Handling Invalid LESS
+An exception will be thrown if the compiler encounters invalid LESS.
+
+```php
+try{
+	$parser = new Less_Parser();
+	$parser->parseFile( '/var/www/mysite/bootstrap.less', 'http://example.com/mysite/' );
+	$css = $parser->getCss();
+}catch(Exception $e){
+	$error_message = $e->getMessage();
+}
+```
+
+
+#### Parsing Multiple Sources
+less.php can parse multiple sources to generate a single CSS file.
+
+```php
+$parser = new Less_Parser();
+$parser->parseFile( '/var/www/mysite/bootstrap.less', '/mysite/' );
+$parser->parse( '@color: #4D926F; #header { color: @color; } h2 { color: @color; }' );
+$css = $parser->getCss();
+```
+
+#### Getting Info About The Parsed Files
+less.php can tell you which .less files were imported and parsed.
+
+```php
+$parser = new Less_Parser();
+$parser->parseFile( '/var/www/mysite/bootstrap.less', '/mysite/' );
+$css = $parser->getCss();
+$imported_files = $parser->allParsedFiles();
+```
+
+
+#### Compressing Output
+You can tell less.php to remove comments and whitespace to generate minimized CSS files.
+
+```php
+$options = array( 'compress'=>true );
+$parser = new Less_Parser( $options );
+$parser->parseFile( '/var/www/mysite/bootstrap.less', '/mysite/' );
+$css = $parser->getCss();
+```
+
+#### Getting Variables
+You can use the getVariables() method to get an all variables defined and
+their value in a php associative array. Note that LESS has to be previously
+compiled.
+```php
+$parser = new Less_Parser;
+$parser->parseFile( '/var/www/mysite/bootstrap.less');
+$css = $parser->getCss();
+$variables = $parser->getVariables();
+
+```
+
+
+
+#### Setting Variables
+You can use the ModifyVars() method to customize your CSS if you have variables stored in PHP associative arrays.
+
+```php
+$parser = new Less_Parser();
+$parser->parseFile( '/var/www/mysite/bootstrap.less', '/mysite/' );
+$parser->ModifyVars( array('font-size-base'=>'16px') );
+$css = $parser->getCss();
+```
+
+
+#### Import Directories
+By default, less.php will look for @imports in the directory of the file passed to parseFile().
+If you're using parse() or if @imports reside in different directories, you can tell less.php where to look.
+
+```php
+$directories = array( '/var/www/mysite/bootstrap/' => '/mysite/bootstrap/' );
+$parser = new Less_Parser();
+$parser->SetImportDirs( $directories );
+$parser->parseFile( '/var/www/mysite/theme.less', '/mysite/' );
+$css = $parser->getCss();
+```
+
+
+Caching
+---
+Compiling LESS code into CSS is a time consuming process, caching your results is highly recommended.
+
+
+#### Caching CSS
+Use the Less_Cache class to save and reuse the results of compiled LESS files.
+This method will check the modified time and size of each LESS file (including imported files) and regenerate a new CSS file when changes are found.
+Note: When changes are found, this method will return a different file name for the new cached content.
+
+```php
+$less_files = array( '/var/www/mysite/bootstrap.less' => '/mysite/' );
+$options = array( 'cache_dir' => '/var/www/writable_folder' );
+$css_file_name = Less_Cache::Get( $less_files, $options );
+$compiled = file_get_contents( '/var/www/writable_folder/'.$css_file_name );
+```
+
+#### Caching CSS With Variables
+Passing options to Less_Cache::Get()
+
+```php
+$less_files = array( '/var/www/mysite/bootstrap.less' => '/mysite/' );
+$options = array( 'cache_dir' => '/var/www/writable_folder' );
+$variables = array( 'width' => '100px' );
+$css_file_name = Less_Cache::Get( $less_files, $options, $variables );
+$compiled = file_get_contents( '/var/www/writable_folder/'.$css_file_name );
+```
+
+
+#### Parser Caching
+less.php will save serialized parser data for each .less file if a writable folder is passed to the SetCacheDir() method.
+Note: This feature only caches intermediate parsing results to improve the performance of repeated CSS generation.
+Your application should cache any CSS generated by less.php.
+
+```php
+$options = array('cache_dir'=>'/var/www/writable_folder');
+$parser = new Less_Parser( $options );
+$parser->parseFile( '/var/www/mysite/bootstrap.less', '/mysite/' );
+$css = $parser->getCss();
+```
+
+You can specify the caching technique used by changing the ```cache_method``` option. Supported methods are:
+* ```php```: Creates valid PHP files which can be included without any changes (default method).
+* ```var_export```: Like "php", but using PHP's ```var_export()``` function without any optimizations.
+  It's recommended to use "php" instead.
+* ```serialize```: Faster, but pretty memory-intense.
+* ```callback```: Use custom callback functions to implement your own caching method. Give the "cache_callback_get" and
+  "cache_callback_set" options with callables (see PHP's ```call_user_func()``` and ```is_callable()``` functions). less.php
+  will pass the parser object (class ```Less_Parser```), the path to the parsed .less file ("/some/path/to/file.less") and
+  an identifier that will change every time the .less file is modified. The ```get``` callback must return the ruleset
+  (an array with ```Less_Tree``` objects) provided as fourth parameter of the ```set``` callback. If something goes wrong,
+  return ```NULL``` (cache doesn't exist) or ```FALSE```.
+
+
+
+Source Maps
+---
+Less.php supports v3 sourcemaps
+
+#### Inline
+The sourcemap will be appended to the generated CSS file.
+
+```php
+$options = array( 'sourceMap' => true );
+$parser = new Less_Parser($options);
+$parser->parseFile( '/var/www/mysite/bootstrap.less', '/mysite/' );
+$css = $parser->getCss();
+```
+
+#### Saving to Map File
+
+```php
+$options = array(
+	'sourceMap'			=> true,
+	'sourceMapWriteTo'	=> '/var/www/mysite/writable_folder/filename.map',
+	'sourceMapURL'		=> '/mysite/writable_folder/filename.map',
+	);
+$parser = new Less_Parser($options);
+$parser->parseFile( '/var/www/mysite/bootstrap.less', '/mysite/' );
+$css = $parser->getCss();
+```
+
+
+Command line
+---
+An additional script has been included to use the compiler from the command line.
+In the simplest invocation, you specify an input file and the compiled CSS is written to standard out:
+
+```
+$ lessc input.less > output.css
+```
+
+By using the -w flag you can watch a specified input file and have it compile as needed to the output file:
+
+```
+$ lessc -w input.less output.css
+```
+
+Errors from watch mode are written to standard out.
+
+For more help, run `lessc --help`
+
+
+Integration with other projects
+---
+
+#### Drupal 7
+
+This library can be used as drop-in replacement of lessphp to work with [Drupal 7 less module](https://drupal.org/project/less).
+
+How to install:
+
+1. [Download the less.php source code](https://github.com/wikimedia/less.php/archive/master.zip) and unzip it so that 'lessc.inc.php' is located at 'sites/all/libraries/lessphp/lessc.inc.php'.
+2. Download and install [Drupal 7 less module](https://drupal.org/project/less) as usual.
+3. That's it :)
+
+#### JBST WordPress theme
+
+JBST has a built-in LESS compiler based on lessphp. Customize your WordPress theme with LESS.
+
+How to use / install:
+
+1. [Download the latest release](https://github.com/bassjobsen/jamedo-bootstrap-start-theme) copy the files to your {wordpress/}wp-content/themes folder and activate it.
+2. Find the compiler under Appearance > LESS Compiler in your WordPress dashboard
+3. Enter your LESS code in the text area and press (re)compile
+
+Use the built-in compiler to:
+- set any [Bootstrap](http://getbootstrap.com/customize/) variable or use Bootstrap's mixins:
+	-`@navbar-default-color: blue;`
+        - create a custom button: `.btn-custom {
+  .button-variant(white; red; blue);
+}`
+- set any built-in LESS variable: for example `@footer_bg_color: black;` sets the background color of the footer to black
+- use built-in mixins: - add a custom font: `.include-custom-font(@family: arial,@font-path, @path: @custom-font-dir, @weight: normal, @style: normal);`
+
+The compiler can also be downloaded as [plugin](http://wordpress.org/plugins/wp-less-to-css/)
+
+#### WordPress
+
+This simple plugin will simply make the library available to other plugins and themes and can be used as a dependency using the [TGM Library](http://tgmpluginactivation.com/)
+
+How to install:
+
+1. Install the plugin from your WordPress Dashboard: http://wordpress.org/plugins/lessphp/
+2. That's it :)
+
+
+Transitioning from Leafo/lessphp
+---
+Projects looking for an easy transition from leafo/lessphp can use the lessc.inc.php adapter. To use, [Download the less.php source code](https://github.com/wikimedia/less.php/archive/master.zip) and unzip the files into your project so that the new 'lessc.inc.php' replaces the existing 'lessc.inc.php'.
+
+Note, the 'setPreserveComments' will no longer have any effect on the compiled LESS.
+
+Credits
+---
+less.php was originally ported to PHP by [Matt Agar](https://github.com/agar) and then updated by [Martin Jantošovič](https://github.com/Mordred). This Wikimedia-maintained fork was split off from [Josh Schmidt's version](https://github.com/oyejorge/less.php).
+
--- a/less.php/bin/lessc
+++ b/less.php/bin/lessc
@ -0,0 +1,191 @@
+#!/usr/bin/env php
+<?php
+
+require_once dirname(__FILE__) . '/../lib/Less/Autoloader.php';
+Less_Autoloader::register();
+
+// Create our environment
+$env		= array('compress' => false, 'relativeUrls' => false);
+$silent		= false;
+$watch		= false;
+$rootpath	= '';
+
+// Check for arguments
+array_shift($argv);
+if (!count($argv)) {
+	$argv[] = '-h';
+}
+
+// parse arguments
+foreach ($argv as $key => $arg) {
+	if (preg_match('/^--?([a-z][0-9a-z-]*)(?:=([^\s]+))?$/i', $arg, $matches)) {
+		$option = $matches[1];
+		$value = isset($matches[2]) ? $matches[2] : false;
+		unset($argv[$key]);
+
+		switch ($option) {
+			case 'h':
+			case 'help':
+				echo <<<EOD
+Usage: lessc [options] sources [destination]
+
+ -h, --help            Print help (this message) and exit.
+ -s, --silent          Suppress output of error messages.
+ -v, --version         Print version number and exit.
+ -x, --compress        Compress output by removing some whitespaces.
+ --include-path=PATHS  Set include paths. Separated by `:'. Use `;' on Windows.
+ --strict-imports      Force evaluation of imports.
+ -sm=on|off            Turn on or off strict math, where in strict mode, math
+ --strict-math=on|off  requires brackets. This option may default to on and then
+                       be removed in the future.
+ -su=on|off            Allow mixed units, e.g. 1px+1em or 1px*1px which have units
+ --strict-units=on|off that cannot be represented.
+ -ru, --relative-urls  re-write relative urls to the base less file.
+ -rp, --rootpath=URL   Set rootpath for url rewriting in relative imports and urls.
+                       Works with or without the relative-urls option.
+ -w, --watch           Watch input files for changes.
+
+
+EOD;
+				exit;
+			case 's':
+			case 'silent':
+				$silent = true;
+				break;
+
+			case 'w':
+			case 'watch':
+				$watch = true;
+				break;
+
+			case 'v':
+			case 'version':
+				echo "lessc " . Less_Version::version . " (less.php)\n\n";
+				exit;
+
+			case 'rp':
+			case 'rootpath':
+				$rootpath = $value;
+				break;
+
+
+			//parser options
+			case 'compress':
+				$env['compress'] = true;
+				break;
+
+			case 'ru':
+			case 'relative-urls':
+				$env['relativeUrls'] = true;
+				break;
+
+			case 'su':
+			case 'strict-units':
+				$env['strictUnits'] = ($value === 'on');
+				break;
+
+			case 'sm':
+			case 'strict-math':
+				$env['strictMath'] = ($value === 'on');
+				break;
+
+			case 'x':
+			case 'include-path':
+				$env['import_dirs'] = preg_split('#;|\:#', $value);
+				break;
+
+		}
+	}
+}
+
+if (count($argv) > 1) {
+	$output = array_pop($argv);
+	$inputs = $argv;
+}
+else {
+	$inputs = $argv;
+	$output = false;
+}
+
+if (!count($inputs)) {
+	echo("lessc: no input files\n");
+	exit;
+}
+
+if ($watch) {
+	if (!$output) {
+		echo("lessc: you must specify the output file if --watch is given\n");
+		exit;
+	}
+
+	$lastAction = 0;
+
+	echo("lessc: watching input files\n");
+
+	while (1) {
+		clearstatcache();
+
+		$updated = false;
+		foreach ($inputs as $input) {
+			if ($input == '-') {
+				if (count($inputs) == 1) {
+					echo("lessc: during watching files is not possible to watch stdin\n");
+					exit;
+				}
+				else {
+					continue;
+				}
+			}
+
+			if (filemtime($input) > $lastAction) {
+				$updated = true;
+				break;
+			}
+		}
+
+		if ($updated) {
+			$lastAction = time();
+			$parser = new Less_Parser($env);
+			foreach ($inputs as $input) {
+				try {
+					$parser->parseFile($input, $rootpath);
+				}
+				catch (Exception $e) {
+					echo("lessc: " . $e->getMessage() . " \n");
+					continue; // Invalid processing
+				}
+			}
+
+			file_put_contents($output, $parser->getCss());
+			echo("lessc: output file recompiled\n");
+		}
+
+		sleep(1);
+	}
+}
+else {
+	$parser = new Less_Parser($env);
+	foreach ($inputs as $input) {
+		if ($input == '-') {
+			$content = file_get_contents('php://stdin');
+			$parser->parse($content);
+		}
+		else {
+			try {
+				$parser->parseFile($input);
+			}
+			catch (Exception $e) {
+				if (!$silent) {
+					echo("lessc: " . ((string)$e) . " \n");
+				}
+			}
+		}
+	}
+
+	if ($output) {
+		file_put_contents($output, $parser->getCss());
+	}
+	else {
+		echo $parser->getCss();
+	}
+}
--- a/less.php/composer.json
+++ b/less.php/composer.json
@ -0,0 +1,49 @@
+{
+	"name": "wikimedia/less.php",
+	"description": "PHP port of the Javascript version of LESS http://lesscss.org (Originally maintained by Josh Schmidt)",
+	"keywords": [ "less", "css", "php", "stylesheet", "less.js", "lesscss" ],
+	"license": "Apache-2.0",
+	"authors": [
+		{
+			"name": "Josh Schmidt",
+			"homepage": "https://github.com/oyejorge"
+		},
+		{
+			"name": "Matt Agar",
+			"homepage": "https://github.com/agar"
+		},
+		{
+			"name": "Martin Jantošovič",
+			"homepage": "https://github.com/Mordred"
+		}
+	],
+	"require": {
+		"php": ">=7.2.9"
+	},
+	"require-dev": {
+		"mediawiki/mediawiki-codesniffer": "34.0.0",
+		"mediawiki/minus-x": "1.0.0",
+		"php-parallel-lint/php-console-highlighter": "0.5.0",
+		"php-parallel-lint/php-parallel-lint": "1.2.0",
+		"phpunit/phpunit": "^8.5"
+	},
+	"scripts": {
+		"test": [
+			"parallel-lint . --exclude vendor",
+			"phpcs -sp",
+			"phpunit",
+			"minus-x check ."
+		],
+		"fix": [
+			"minus-x fix .",
+			"phpcbf"
+		]
+	},
+	"autoload": {
+		"psr-0": { "Less": "lib/" },
+		"classmap": ["lessc.inc.php"]
+	},
+	"bin": [
+		"bin/lessc"
+	]
+}
--- a/less.php/lessc.inc.php
+++ b/less.php/lessc.inc.php
@ -0,0 +1,274 @@
+<?php
+/**
+ * This file provides the part of lessphp API (https://github.com/leafo/lessphp)
+ * to be a drop-in replacement for following products:
+ *  - Drupal 7, by the less module v3.0+ (https://drupal.org/project/less)
+ *  - Symfony 2
+ */
+
+// Register autoloader for non-composer installations
+if ( !class_exists( 'Less_Parser' ) ) {
+	require_once __DIR__ . '/lib/Less/Autoloader.php';
+	Less_Autoloader::register();
+}
+
+class lessc {
+
+	static public $VERSION = Less_Version::less_version;
+
+	public $importDir = '';
+	protected $allParsedFiles = array();
+	protected $libFunctions = array();
+	protected $registeredVars = array();
+	private $formatterName;
+	private $options = array();
+
+	public function __construct( $lessc = null, $sourceName = null ) {
+	}
+
+	public function setImportDir( $dirs ) {
+		$this->importDir = (array)$dirs;
+	}
+
+	public function addImportDir( $dir ) {
+		$this->importDir = (array)$this->importDir;
+		$this->importDir[] = $dir;
+	}
+
+	public function setFormatter( $name ) {
+		$this->formatterName = $name;
+	}
+
+	public function setPreserveComments( $preserve ) {
+	}
+
+	public function registerFunction( $name, $func ) {
+		$this->libFunctions[$name] = $func;
+	}
+
+	public function unregisterFunction( $name ) {
+		unset( $this->libFunctions[$name] );
+	}
+
+	public function setVariables( $variables ) {
+		foreach ( $variables as $name => $value ) {
+			$this->setVariable( $name, $value );
+		}
+	}
+
+	public function setVariable( $name, $value ) {
+		$this->registeredVars[$name] = $value;
+	}
+
+	public function unsetVariable( $name ) {
+		unset( $this->registeredVars[$name] );
+	}
+
+	public function setOptions( $options ) {
+		foreach ( $options as $name => $value ) {
+			$this->setOption( $name, $value );
+		}
+	}
+
+	public function setOption( $name, $value ) {
+		$this->options[$name] = $value;
+	}
+
+	public function parse( $buffer, $presets = array() ) {
+		$this->setVariables( $presets );
+
+		$parser = new Less_Parser( $this->getOptions() );
+		$parser->setImportDirs( $this->getImportDirs() );
+		foreach ( $this->libFunctions as $name => $func ) {
+			$parser->registerFunction( $name, $func );
+		}
+		$parser->parse( $buffer );
+		if ( count( $this->registeredVars ) ) {
+			$parser->ModifyVars( $this->registeredVars );
+		}
+
+		return $parser->getCss();
+	}
+
+	protected function getOptions() {
+		$options = array( 'relativeUrls' => false );
+		switch ( $this->formatterName ) {
+			case 'compressed':
+				$options['compress'] = true;
+				break;
+		}
+		if ( is_array( $this->options ) ) {
+			$options = array_merge( $options, $this->options );
+		}
+		return $options;
+	}
+
+	protected function getImportDirs() {
+		$dirs_ = (array)$this->importDir;
+		$dirs = array();
+		foreach ( $dirs_ as $dir ) {
+			$dirs[$dir] = '';
+		}
+		return $dirs;
+	}
+
+	public function compile( $string, $name = null ) {
+		$oldImport = $this->importDir;
+		$this->importDir = (array)$this->importDir;
+
+		$this->allParsedFiles = array();
+
+		$parser = new Less_Parser( $this->getOptions() );
+		$parser->SetImportDirs( $this->getImportDirs() );
+		if ( count( $this->registeredVars ) ) {
+			$parser->ModifyVars( $this->registeredVars );
+		}
+		foreach ( $this->libFunctions as $name => $func ) {
+			$parser->registerFunction( $name, $func );
+		}
+		$parser->parse( $string );
+		$out = $parser->getCss();
+
+		$parsed = Less_Parser::AllParsedFiles();
+		foreach ( $parsed as $file ) {
+			$this->addParsedFile( $file );
+		}
+
+		$this->importDir = $oldImport;
+
+		return $out;
+	}
+
+	public function compileFile( $fname, $outFname = null ) {
+		if ( !is_readable( $fname ) ) {
+			throw new Exception( 'load error: failed to find '.$fname );
+		}
+
+		$pi = pathinfo( $fname );
+
+		$oldImport = $this->importDir;
+
+		$this->importDir = (array)$this->importDir;
+		$this->importDir[] = Less_Parser::AbsPath( $pi['dirname'] ).'/';
+
+		$this->allParsedFiles = array();
+		$this->addParsedFile( $fname );
+
+		$parser = new Less_Parser( $this->getOptions() );
+		$parser->SetImportDirs( $this->getImportDirs() );
+		if ( count( $this->registeredVars ) ) {
+			$parser->ModifyVars( $this->registeredVars );
+		}
+		foreach ( $this->libFunctions as $name => $func ) {
+			$parser->registerFunction( $name, $func );
+		}
+		$parser->parseFile( $fname );
+		$out = $parser->getCss();
+
+		$parsed = Less_Parser::AllParsedFiles();
+		foreach ( $parsed as $file ) {
+			$this->addParsedFile( $file );
+		}
+
+		$this->importDir = $oldImport;
+
+		if ( $outFname !== null ) {
+			return file_put_contents( $outFname, $out );
+		}
+
+		return $out;
+	}
+
+	public function checkedCompile( $in, $out ) {
+		if ( !is_file( $out ) || filemtime( $in ) > filemtime( $out ) ) {
+			$this->compileFile( $in, $out );
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * Execute lessphp on a .less file or a lessphp cache structure
+	 *
+	 * The lessphp cache structure contains information about a specific
+	 * less file having been parsed. It can be used as a hint for future
+	 * calls to determine whether or not a rebuild is required.
+	 *
+	 * The cache structure contains two important keys that may be used
+	 * externally:
+	 *
+	 * compiled: The final compiled CSS
+	 * updated: The time (in seconds) the CSS was last compiled
+	 *
+	 * The cache structure is a plain-ol' PHP associative array and can
+	 * be serialized and unserialized without a hitch.
+	 *
+	 * @param mixed $in Input
+	 * @param bool $force Force rebuild?
+	 * @return array lessphp cache structure
+	 */
+	public function cachedCompile( $in, $force = false ) {
+		// assume no root
+		$root = null;
+
+		if ( is_string( $in ) ) {
+			$root = $in;
+		} elseif ( is_array( $in ) and isset( $in['root'] ) ) {
+			if ( $force or !isset( $in['files'] ) ) {
+				// If we are forcing a recompile or if for some reason the
+				// structure does not contain any file information we should
+				// specify the root to trigger a rebuild.
+				$root = $in['root'];
+			} elseif ( isset( $in['files'] ) and is_array( $in['files'] ) ) {
+				foreach ( $in['files'] as $fname => $ftime ) {
+					if ( !file_exists( $fname ) or filemtime( $fname ) > $ftime ) {
+						// One of the files we knew about previously has changed
+						// so we should look at our incoming root again.
+						$root = $in['root'];
+						break;
+					}
+				}
+			}
+		} else {
+			// TODO: Throw an exception? We got neither a string nor something
+			// that looks like a compatible lessphp cache structure.
+			return null;
+		}
+
+		if ( $root !== null ) {
+			// If we have a root value which means we should rebuild.
+			$out = array();
+			$out['root'] = $root;
+			$out['compiled'] = $this->compileFile( $root );
+			$out['files'] = $this->allParsedFiles();
+			$out['updated'] = time();
+			return $out;
+		} else {
+			// No changes, pass back the structure
+			// we were given initially.
+			return $in;
+		}
+	}
+
+	public function ccompile( $in, $out, $less = null ) {
+		if ( $less === null ) {
+			$less = new self;
+		}
+		return $less->checkedCompile( $in, $out );
+	}
+
+	public static function cexecute( $in, $force = false, $less = null ) {
+		if ( $less === null ) {
+			$less = new self;
+		}
+		return $less->cachedCompile( $in, $force );
+	}
+
+	public function allParsedFiles() {
+		return $this->allParsedFiles;
+	}
+
+	protected function addParsedFile( $file ) {
+		$this->allParsedFiles[Less_Parser::AbsPath( $file )] = filemtime( $file );
+	}
+}
--- a/less.php/lib/Less/.easymin/ignore_prefixes
+++ b/less.php/lib/Less/.easymin/ignore_prefixes
@ -0,0 +1,2 @@
+.easymin
+Autoloader.php
--- a/less.php/lib/Less/Autoloader.php
+++ b/less.php/lib/Less/Autoloader.php
@ -0,0 +1,77 @@
+<?php
+
+/**
+ * Autoloader
+ *
+ * @package Less
+ * @subpackage autoload
+ */
+class Less_Autoloader {
+
+	/**
+	 * Registered flag
+	 *
+	 * @var boolean
+	 */
+	protected static $registered = false;
+
+	/**
+	 * Library directory
+	 *
+	 * @var string
+	 */
+	protected static $libDir;
+
+	/**
+	 * Register the autoloader in the spl autoloader
+	 *
+	 * @return void
+	 * @throws Exception If there was an error in registration
+	 */
+	public static function register() {
+		if ( self::$registered ) {
+			return;
+		}
+
+		self::$libDir = dirname( __FILE__ );
+
+		if ( false === spl_autoload_register( array( 'Less_Autoloader', 'loadClass' ) ) ) {
+			throw new Exception( 'Unable to register Less_Autoloader::loadClass as an autoloading method.' );
+		}
+
+		self::$registered = true;
+	}
+
+	/**
+	 * Unregisters the autoloader
+	 *
+	 * @return void
+	 */
+	public static function unregister() {
+		spl_autoload_unregister( array( 'Less_Autoloader', 'loadClass' ) );
+		self::$registered = false;
+	}
+
+	/**
+	 * Loads the class
+	 *
+	 * @param string $className The class to load
+	 */
+	public static function loadClass( $className ) {
+		// handle only package classes
+		if ( strpos( $className, 'Less_' ) !== 0 ) {
+			return;
+		}
+
+		$className = substr( $className, 5 );
+		$fileName = self::$libDir . DIRECTORY_SEPARATOR . str_replace( '_', DIRECTORY_SEPARATOR, $className ) . '.php';
+
+		if ( file_exists( $fileName ) ) {
+			require $fileName;
+			return true;
+		} else {
+			throw new Exception( 'file not loadable '.$fileName );
+		}
+	}
+
+}
--- a/less.php/lib/Less/Cache.php
+++ b/less.php/lib/Less/Cache.php
@ -0,0 +1,293 @@
+<?php
+
+require_once dirname( __FILE__ ).'/Version.php';
+
+/**
+ * Utility for handling the generation and caching of css files
+ *
+ * @package Less
+ * @subpackage cache
+ *
+ */
+class Less_Cache {
+
+	// directory less.php can use for storing data
+	public static $cache_dir	= false;
+
+	// prefix for the storing data
+	public static $prefix		= 'lessphp_';
+
+	// prefix for the storing vars
+	public static $prefix_vars	= 'lessphpvars_';
+
+	// specifies the number of seconds after which data created by less.php will be seen as 'garbage' and potentially cleaned up
+	public static $gc_lifetime	= 604800;
+
+	/**
+	 * Save and reuse the results of compiled less files.
+	 * The first call to Get() will generate css and save it.
+	 * Subsequent calls to Get() with the same arguments will return the same css filename
+	 *
+	 * @param array $less_files Array of .less files to compile
+	 * @param array $parser_options Array of compiler options
+	 * @param array $modify_vars Array of variables
+	 * @return string Name of the css file
+	 */
+	public static function Get( $less_files, $parser_options = array(), $modify_vars = array() ) {
+		// check $cache_dir
+		if ( isset( $parser_options['cache_dir'] ) ) {
+			Less_Cache::$cache_dir = $parser_options['cache_dir'];
+		}
+
+		if ( empty( Less_Cache::$cache_dir ) ) {
+			throw new Exception( 'cache_dir not set' );
+		}
+
+		if ( isset( $parser_options['prefix'] ) ) {
+			Less_Cache::$prefix = $parser_options['prefix'];
+		}
+
+		if ( empty( Less_Cache::$prefix ) ) {
+			throw new Exception( 'prefix not set' );
+		}
+
+		if ( isset( $parser_options['prefix_vars'] ) ) {
+			Less_Cache::$prefix_vars = $parser_options['prefix_vars'];
+		}
+
+		if ( empty( Less_Cache::$prefix_vars ) ) {
+			throw new Exception( 'prefix_vars not set' );
+		}
+
+		self::CheckCacheDir();
+		$less_files = (array)$less_files;
+
+		// create a file for variables
+		if ( !empty( $modify_vars ) ) {
+			$lessvars = Less_Parser::serializeVars( $modify_vars );
+			$vars_file = Less_Cache::$cache_dir . Less_Cache::$prefix_vars . sha1( $lessvars ) . '.less';
+
+			if ( !file_exists( $vars_file ) ) {
+				file_put_contents( $vars_file, $lessvars );
+			}
+
+			$less_files += array( $vars_file => '/' );
+		}
+
+		// generate name for compiled css file
+		$hash = md5( json_encode( $less_files ) );
+		$list_file = Less_Cache::$cache_dir . Less_Cache::$prefix . $hash . '.list';
+
+		// check cached content
+		if ( !isset( $parser_options['use_cache'] ) || $parser_options['use_cache'] === true ) {
+			if ( file_exists( $list_file ) ) {
+
+				self::ListFiles( $list_file, $list, $cached_name );
+				$compiled_name = self::CompiledName( $list, $hash );
+
+				// if $cached_name is the same as the $compiled name, don't regenerate
+				if ( !$cached_name || $cached_name === $compiled_name ) {
+
+					$output_file = self::OutputFile( $compiled_name, $parser_options );
+
+					if ( $output_file && file_exists( $output_file ) ) {
+						@touch( $list_file );
+						return basename( $output_file ); // for backwards compatibility, we just return the name of the file
+					}
+				}
+			}
+		}
+
+		$compiled = self::Cache( $less_files, $parser_options );
+		if ( !$compiled ) {
+			return false;
+		}
+
+		$compiled_name = self::CompiledName( $less_files, $hash );
+		$output_file = self::OutputFile( $compiled_name, $parser_options );
+
+		// save the file list
+		$list = $less_files;
+		$list[] = $compiled_name;
+		$cache = implode( "\n", $list );
+		file_put_contents( $list_file, $cache );
+
+		// save the css
+		file_put_contents( $output_file, $compiled );
+
+		// clean up
+		self::CleanCache();
+
+		return basename( $output_file );
+	}
+
+	/**
+	 * Force the compiler to regenerate the cached css file
+	 *
+	 * @param array $less_files Array of .less files to compile
+	 * @param array $parser_options Array of compiler options
+	 * @param array $modify_vars Array of variables
+	 * @return string Name of the css file
+	 */
+	public static function Regen( $less_files, $parser_options = array(), $modify_vars = array() ) {
+		$parser_options['use_cache'] = false;
+		return self::Get( $less_files, $parser_options, $modify_vars );
+	}
+
+	public static function Cache( &$less_files, $parser_options = array() ) {
+		// get less.php if it exists
+		$file = dirname( __FILE__ ) . '/Less.php';
+		if ( file_exists( $file ) && !class_exists( 'Less_Parser' ) ) {
+			require_once $file;
+		}
+
+		$parser_options['cache_dir'] = Less_Cache::$cache_dir;
+		$parser = new Less_Parser( $parser_options );
+
+		// combine files
+		foreach ( $less_files as $file_path => $uri_or_less ) {
+
+			// treat as less markup if there are newline characters
+			if ( strpos( $uri_or_less, "\n" ) !== false ) {
+				$parser->Parse( $uri_or_less );
+				continue;
+			}
+
+			$parser->ParseFile( $file_path, $uri_or_less );
+		}
+
+		$compiled = $parser->getCss();
+
+		$less_files = $parser->allParsedFiles();
+
+		return $compiled;
+	}
+
+	private static function OutputFile( $compiled_name, $parser_options ) {
+		// custom output file
+		if ( !empty( $parser_options['output'] ) ) {
+
+			// relative to cache directory?
+			if ( preg_match( '#[\\\\/]#', $parser_options['output'] ) ) {
+				return $parser_options['output'];
+			}
+
+			return Less_Cache::$cache_dir.$parser_options['output'];
+		}
+
+		return Less_Cache::$cache_dir.$compiled_name;
+	}
+
+	private static function CompiledName( $files, $extrahash ) {
+		// save the file list
+		$temp = array( Less_Version::cache_version );
+		foreach ( $files as $file ) {
+			$temp[] = filemtime( $file )."\t".filesize( $file )."\t".$file;
+		}
+
+		return Less_Cache::$prefix.sha1( json_encode( $temp ).$extrahash ).'.css';
+	}
+
+	public static function SetCacheDir( $dir ) {
+		Less_Cache::$cache_dir = $dir;
+		self::CheckCacheDir();
+	}
+
+	public static function CheckCacheDir() {
+		Less_Cache::$cache_dir = str_replace( '\\', '/', Less_Cache::$cache_dir );
+		Less_Cache::$cache_dir = rtrim( Less_Cache::$cache_dir, '/' ).'/';
+
+		if ( !file_exists( Less_Cache::$cache_dir ) ) {
+			if ( !mkdir( Less_Cache::$cache_dir ) ) {
+				throw new Less_Exception_Parser( 'Less.php cache directory couldn\'t be created: '.Less_Cache::$cache_dir );
+			}
+
+		} elseif ( !is_dir( Less_Cache::$cache_dir ) ) {
+			throw new Less_Exception_Parser( 'Less.php cache directory doesn\'t exist: '.Less_Cache::$cache_dir );
+
+		} elseif ( !is_writable( Less_Cache::$cache_dir ) ) {
+			throw new Less_Exception_Parser( 'Less.php cache directory isn\'t writable: '.Less_Cache::$cache_dir );
+
+		}
+
+	}
+
+	/**
+	 * Delete unused less.php files
+	 *
+	 */
+	public static function CleanCache() {
+		static $clean = false;
+
+		if ( $clean || empty( Less_Cache::$cache_dir ) ) {
+			return;
+		}
+
+		$clean = true;
+
+		// only remove files with extensions created by less.php
+		// css files removed based on the list files
+		$remove_types = array( 'lesscache' => 1,'list' => 1,'less' => 1,'map' => 1 );
+
+		$files = scandir( Less_Cache::$cache_dir );
+		if ( !$files ) {
+			return;
+		}
+
+		$check_time = time() - self::$gc_lifetime;
+		foreach ( $files as $file ) {
+
+			// don't delete if the file wasn't created with less.php
+			if ( strpos( $file, Less_Cache::$prefix ) !== 0 ) {
+				continue;
+			}
+
+			$parts = explode( '.', $file );
+			$type = array_pop( $parts );
+
+			if ( !isset( $remove_types[$type] ) ) {
+				continue;
+			}
+
+			$full_path = Less_Cache::$cache_dir . $file;
+			$mtime = filemtime( $full_path );
+
+			// don't delete if it's a relatively new file
+			if ( $mtime > $check_time ) {
+				continue;
+			}
+
+			// delete the list file and associated css file
+			if ( $type === 'list' ) {
+				self::ListFiles( $full_path, $list, $css_file_name );
+				if ( $css_file_name ) {
+					$css_file = Less_Cache::$cache_dir . $css_file_name;
+					if ( file_exists( $css_file ) ) {
+						unlink( $css_file );
+					}
+				}
+			}
+
+			unlink( $full_path );
+		}
+
+	}
+
+	/**
+	 * Get the list of less files and generated css file from a list file
+	 *
+	 */
+	static function ListFiles( $list_file, &$list, &$css_file_name ) {
+		$list = explode( "\n", file_get_contents( $list_file ) );
+
+		// pop the cached name that should match $compiled_name
+		$css_file_name = array_pop( $list );
+
+		if ( !preg_match( '/^' . Less_Cache::$prefix . '[a-f0-9]+\.css$/', $css_file_name ) ) {
+			$list[] = $css_file_name;
+			$css_file_name = false;
+		}
+
+	}
+
+}
--- a/less.php/lib/Less/Colors.php
+++ b/less.php/lib/Less/Colors.php
@ -0,0 +1,169 @@
+<?php
+
+/**
+ * Utility for css colors
+ *
+ * @package Less
+ * @subpackage color
+ */
+class Less_Colors {
+
+	public static $colors = array(
+			'aliceblue' => '#f0f8ff',
+			'antiquewhite' => '#faebd7',
+			'aqua' => '#00ffff',
+			'aquamarine' => '#7fffd4',
+			'azure' => '#f0ffff',
+			'beige' => '#f5f5dc',
+			'bisque' => '#ffe4c4',
+			'black' => '#000000',
+			'blanchedalmond' => '#ffebcd',
+			'blue' => '#0000ff',
+			'blueviolet' => '#8a2be2',
+			'brown' => '#a52a2a',
+			'burlywood' => '#deb887',
+			'cadetblue' => '#5f9ea0',
+			'chartreuse' => '#7fff00',
+			'chocolate' => '#d2691e',
+			'coral' => '#ff7f50',
+			'cornflowerblue' => '#6495ed',
+			'cornsilk' => '#fff8dc',
+			'crimson' => '#dc143c',
+			'cyan' => '#00ffff',
+			'darkblue' => '#00008b',
+			'darkcyan' => '#008b8b',
+			'darkgoldenrod' => '#b8860b',
+			'darkgray' => '#a9a9a9',
+			'darkgrey' => '#a9a9a9',
+			'darkgreen' => '#006400',
+			'darkkhaki' => '#bdb76b',
+			'darkmagenta' => '#8b008b',
+			'darkolivegreen' => '#556b2f',
+			'darkorange' => '#ff8c00',
+			'darkorchid' => '#9932cc',
+			'darkred' => '#8b0000',
+			'darksalmon' => '#e9967a',
+			'darkseagreen' => '#8fbc8f',
+			'darkslateblue' => '#483d8b',
+			'darkslategray' => '#2f4f4f',
+			'darkslategrey' => '#2f4f4f',
+			'darkturquoise' => '#00ced1',
+			'darkviolet' => '#9400d3',
+			'deeppink' => '#ff1493',
+			'deepskyblue' => '#00bfff',
+			'dimgray' => '#696969',
+			'dimgrey' => '#696969',
+			'dodgerblue' => '#1e90ff',
+			'firebrick' => '#b22222',
+			'floralwhite' => '#fffaf0',
+			'forestgreen' => '#228b22',
+			'fuchsia' => '#ff00ff',
+			'gainsboro' => '#dcdcdc',
+			'ghostwhite' => '#f8f8ff',
+			'gold' => '#ffd700',
+			'goldenrod' => '#daa520',
+			'gray' => '#808080',
+			'grey' => '#808080',
+			'green' => '#008000',
+			'greenyellow' => '#adff2f',
+			'honeydew' => '#f0fff0',
+			'hotpink' => '#ff69b4',
+			'indianred' => '#cd5c5c',
+			'indigo' => '#4b0082',
+			'ivory' => '#fffff0',
+			'khaki' => '#f0e68c',
+			'lavender' => '#e6e6fa',
+			'lavenderblush' => '#fff0f5',
+			'lawngreen' => '#7cfc00',
+			'lemonchiffon' => '#fffacd',
+			'lightblue' => '#add8e6',
+			'lightcoral' => '#f08080',
+			'lightcyan' => '#e0ffff',
+			'lightgoldenrodyellow' => '#fafad2',
+			'lightgray' => '#d3d3d3',
+			'lightgrey' => '#d3d3d3',
+			'lightgreen' => '#90ee90',
+			'lightpink' => '#ffb6c1',
+			'lightsalmon' => '#ffa07a',
+			'lightseagreen' => '#20b2aa',
+			'lightskyblue' => '#87cefa',
+			'lightslategray' => '#778899',
+			'lightslategrey' => '#778899',
+			'lightsteelblue' => '#b0c4de',
+			'lightyellow' => '#ffffe0',
+			'lime' => '#00ff00',
+			'limegreen' => '#32cd32',
+			'linen' => '#faf0e6',
+			'magenta' => '#ff00ff',
+			'maroon' => '#800000',
+			'mediumaquamarine' => '#66cdaa',
+			'mediumblue' => '#0000cd',
+			'mediumorchid' => '#ba55d3',
+			'mediumpurple' => '#9370d8',
+			'mediumseagreen' => '#3cb371',
+			'mediumslateblue' => '#7b68ee',
+			'mediumspringgreen' => '#00fa9a',
+			'mediumturquoise' => '#48d1cc',
+			'mediumvioletred' => '#c71585',
+			'midnightblue' => '#191970',
+			'mintcream' => '#f5fffa',
+			'mistyrose' => '#ffe4e1',
+			'moccasin' => '#ffe4b5',
+			'navajowhite' => '#ffdead',
+			'navy' => '#000080',
+			'oldlace' => '#fdf5e6',
+			'olive' => '#808000',
+			'olivedrab' => '#6b8e23',
+			'orange' => '#ffa500',
+			'orangered' => '#ff4500',
+			'orchid' => '#da70d6',
+			'palegoldenrod' => '#eee8aa',
+			'palegreen' => '#98fb98',
+			'paleturquoise' => '#afeeee',
+			'palevioletred' => '#d87093',
+			'papayawhip' => '#ffefd5',
+			'peachpuff' => '#ffdab9',
+			'peru' => '#cd853f',
+			'pink' => '#ffc0cb',
+			'plum' => '#dda0dd',
+			'powderblue' => '#b0e0e6',
+			'purple' => '#800080',
+			'red' => '#ff0000',
+			'rosybrown' => '#bc8f8f',
+			'royalblue' => '#4169e1',
+			'saddlebrown' => '#8b4513',
+			'salmon' => '#fa8072',
+			'sandybrown' => '#f4a460',
+			'seagreen' => '#2e8b57',
+			'seashell' => '#fff5ee',
+			'sienna' => '#a0522d',
+			'silver' => '#c0c0c0',
+			'skyblue' => '#87ceeb',
+			'slateblue' => '#6a5acd',
+			'slategray' => '#708090',
+			'slategrey' => '#708090',
+			'snow' => '#fffafa',
+			'springgreen' => '#00ff7f',
+			'steelblue' => '#4682b4',
+			'tan' => '#d2b48c',
+			'teal' => '#008080',
+			'thistle' => '#d8bfd8',
+			'tomato' => '#ff6347',
+			'turquoise' => '#40e0d0',
+			'violet' => '#ee82ee',
+			'wheat' => '#f5deb3',
+			'white' => '#ffffff',
+			'whitesmoke' => '#f5f5f5',
+			'yellow' => '#ffff00',
+			'yellowgreen' => '#9acd32'
+		);
+
+	public static function hasOwnProperty( $color ) {
+		return isset( self::$colors[$color] );
+	}
+
+	public static function color( $color ) {
+		return self::$colors[$color];
+	}
+
+}
--- a/less.php/lib/Less/Configurable.php
+++ b/less.php/lib/Less/Configurable.php
@ -0,0 +1,66 @@
+<?php
+
+/**
+ * Configurable
+ *
+ * @package Less
+ * @subpackage Core
+ */
+abstract class Less_Configurable {
+
+	/**
+	 * Array of options
+	 *
+	 * @var array
+	 */
+	protected $options = array();
+
+	/**
+	 * Array of default options
+	 *
+	 * @var array
+	 */
+	protected $defaultOptions = array();
+
+	/**
+	 * Set options
+	 *
+	 * If $options is an object it will be converted into an array by called
+	 * it's toArray method.
+	 *
+	 * @throws Exception
+	 * @param array|object $options
+	 *