Extension:Scribunto - Revision history

MontessoriX: Created page with " {{Bundled|1.34}} {{Note|text= This extension runs on top of an executable. You must have permission to run executables on your host in order for this extension to work.}} {{Extension |status = stable |type1 = parser |type2 = |newhook1 = ScribuntoExternalLibraries |newhook2 = ScribuntoExternalLibraryPaths |username = |author =
2023-08-06T09:21:33Z

Created page with "<languages/> {{Bundled|1.34}} {{Note|text=<translate> This extension runs on top of an executable.</translate> <translate> You must have permission to run executables on your host in order for this extension to work.</translate>}} {{Extension |status = stable |type1 = parser |type2 = |newhook1 = ScribuntoExternalLibraries |newhook2 = ScribuntoExternalLibraryPaths |username = |author = <now..."

New page
<languages/>
{{Bundled|1.34}}
{{Note|text=<translate> This extension runs on top of an executable.</translate> <translate> You must have permission to run executables on your host in order for this extension to work.</translate>}}
{{Extension
|status = stable
|type1 = parser
|type2 =
|newhook1 = ScribuntoExternalLibraries
|newhook2 = ScribuntoExternalLibraryPaths
|username =
|author = <nowiki/>
* Victor Vasiliev
* Tim Starling
: {{int|and}}{{int|word-separator}}{{int|version-poweredby-others}}
|description = <translate> Provides a framework for embedding scripting languages into MediaWiki pages</translate>
|image =
|imagesize =
|version = <translate> Continuous updates</translate>
|update =
|mediawiki =
|php = 5.5+
|download = {{WikimediaDownload|phab=ELUA}}
|readme =
|changelog =
|tags =
|namespace = Module (ns:828), Talk_Module (ns:829)
|example =
|compatibility policy = rel
|phabricator = MediaWiki-extensions-Scribunto
|vagrant-role = scribunto
}}
<translate>

The '''Scribunto''' ([[w:Latin|Latin]]: "''[[wikt:scribunto|they shall write/let them write (in the future)]]''") extension allows for embedding scripting languages in MediaWiki.
</translate>

<translate> Currently the only supported scripting language is [[w:Wikipedia:Lua|Lua]].</translate>
<translate> Scribunto Lua scripts go in a namespace called '''Module'''.</translate>
<translate> Modules are run on normal wiki pages using the <tvar name=1>'''#invoke'''</tvar> parser function and each module has a collection of '''functions''', which can be called using wikitext syntax such as:</translate>

{{Anchor|#invoke|.23invoke}}<nowiki>{{#invoke:</nowiki> ''Module_name'' | ''function_name'' | ''arg1'' | ''arg2'' | ''arg3'' ... }}

<translate>
== License == 


This extension contains code licensed GNU General Public License v2.0 or later (GPL-2.0+) as well as code licensed MIT License (MIT).

== Requirements == 

=== PCRE version compatibility === 
</translate>
<translate> PCRE 8.33+ is recommended.</translate>
<translate> PCRE 8.33 was released in May 2013.</translate>
<translate> You can see the version of [[w:PCRE|PCRE]] used by PHP by viewing a <tvar name=1>phpinfo()</tvar> web page, or from the command line with the following command:</translate>
<syntaxhighlight lang="bash">
php -r 'echo "pcre: " . ( extension_loaded( "pcre" ) ? PCRE_VERSION : "no" ) . "\n";'
</syntaxhighlight>

<translate>

* Scribunto will not work with versions of PCRE lower than 8.10.</translate>
<translate>

* PCRE 8.31 has bugs with JIT pattern studying that [[<tvar name=1>phab:T73922</tvar>|breaks various patterns when used with HHVM]].</translate>
<translate>

* PCRE 8.32 has [<tvar name=url>https://bugs.exim.org/show_bug.cgi?id=1340</tvar> a bug] that will cause it to reject certain [[w:Mapping of Unicode characters#Non-characters|non-character codepoints]], which will cause errors in the mw.html module.


CentOS 6 and RHEL 6 are stuck on PCRE 7 and need to be upgraded.
</translate>

<translate> Updating to 8.33 on a server with an older version may be relatively complicated.</translate>
<translate> See <tvar name=1>{{ll|Updating to PCRE 8.33 or Higher}}</tvar> for details.</translate>

<translate>
=== PHP pcntl ([[LTS|LTS]]) === 
</translate>
{{MW version|version=1.25|version2=1.28}}
<translate> Scribunto versions for MediaWiki 1.25 to 1.28 required PHP's [<tvar name=url>https://php.net/pcntl.installation</tvar> pcntl extension], which is only available on Unix/Linux platforms, if you want to use "LuaStandalone" (i.e. running in a separate child process).</translate>
<translate> This requirement was removed in Scribunto for MediaWiki 1.29.</translate>

<translate>

You can check whether <tvar name=1>pcntl</tvar> support is enabled by viewing a <tvar name=2>phpinfo()</tvar> web page, or from the command line with the following command:
</translate>

<syntaxhighlight lang="bash">
php -r 'echo "pcntl: " . ( extension_loaded( "pcntl" ) ? "yes" : "no" ) . "\n";'
</syntaxhighlight>

<translate>
=== PHP mbstring extension === 


PHP needs to have the <tvar name=1>[https://php.net/mbstring mbstring]</tvar> extension enabled.


You can check whether <tvar name=1>mbstring</tvar> support is enabled by viewing a <tvar name=2>phpinfo()</tvar> web page, or from the command line with the following command:
</translate>

<syntaxhighlight lang="bash">
php -r 'echo "mbstring: " . ( extension_loaded( "mbstring" ) ? "yes" : "no" ) . "\n";'
</syntaxhighlight>

<translate>
=== Lua binary === 

==== Bundled binaries ==== 


Scribunto comes bundled with Lua binary distributions for Linux (x86 and x86-64), Mac OS X Lion, and Windows (32- and 64-bit).


Scribunto should work for you out of the box if:
</translate>

# <translate> Your web server is run on one of the above platforms.</translate>
# <translate> PHP's <tvar name=1><code>proc_open</code></tvar> function is not restricted.</translate><ref><translate> i.e. Scribunto will not work if <tvar name=1><code>proc_open</code></tvar> is listed in the <tvar name=2><code>disable_functions</code></tvar> array in your server's "<tvar name=3>php.ini</tvar>" file.</translate> <translate> If it is, you may see an error message like <tvar name=1><code>proc_open(): open_basedir restriction in effect. File(/dev/null) is not within the allowed path(s):</code></tvar></translate>. <translate> If you are using Plesk and have been granted sufficient permissions, you may be able to set <tvar name=1><code>open_basedir</code></tvar> in the PHP settings for your domain or subdomain.</translate> <translate> Try changing <tvar name=1><code>{WEBSPACEROOT}{/}{:}{TMP}{/}</code></tvar> to <tvar name=2><code>{WEBSPACEROOT}{/}{:}{TMP}{/}{:}/dev/null{:}/bin/bash</code></tvar>.</translate></ref>
# <translate> Your web server is configured to allow the execution of binary files in the MediaWiki tree.</translate>
: {{Note}} <translate> Execute permissions may need to be set; for example, in Linux use:</translate>
::<syntaxhighlight lang="bash">
chmod 755 /path/to/extensions/Scribunto/includes/Engines/LuaStandalone/binaries/lua5_1_5_linux_64_generic/lua</syntaxhighlight><translate> If you are using SELinux in "Enforcing" mode on your server, you might need to set a proper context for the binaries.</translate> <translate> Example for RHEL/CentOS 7:</translate><syntaxhighlight lang="bash">
chcon -t httpd_sys_script_exec_t /path/to/extensions/Scribunto/includes/Engines/LuaStandalone/binaries/lua5_1_5_linux_64_generic/lua
</syntaxhighlight>
<translate> P.S. Check your version of the extension to see if the name of the engines folder is capitalised or fully lowercase.</translate><ref name="engines"><translate> [<tvar name="url">https://github.com/wikimedia/mediawiki-extensions-Scribunto/commit/1eecdac6def6418fb36829cc2f20b464c30e4b37</tvar> The name of the engines folder changed from lowercase to capitalised in 2022].</translate></ref>

<translate>
==== Additional binaries ==== 


Additional Lua binary distributions, which may be needed for your web server if its operating system is not in the list above, can be obtained from <tvar name=1>http://luabinaries.sourceforge.net/</tvar> or from your Linux distribution.


Only binary files for Lua 5.1.x are supported.


Once you've installed the appropriate binary file on your web server, configure the location of the file with:
</translate>

<syntaxhighlight lang="php">
# <translate nowrap> Where Lua is the name of the binary file</translate>
# <translate nowrap> e.g. SourceForge LuaBinaries 5.1.5 - Release 2 name the binary file <tvar name=1>lua5.1</tvar></translate>
$wgScribuntoEngineConf['luastandalone']['luaPath'] = '/path/to/binaries/lua5.1';
</syntaxhighlight>
<translate>

Note that you should not add the above line unless you've confirmed that Scribunto's built-in binaries don't work for you.


LuaJIT, although theoretically compatible, is not supported.


The support was removed due to [[w:Spectre (security vulnerability)|Spectre]] and bitrot concerns (<tvar name=1>[[phab:T184156]]</tvar>).

== Installation == 
</translate>
{{ExtensionInstall|vagrant=scribunto|localsettings=$wgScribuntoDefaultEngine = 'luastandalone';|custom-steps=* <translate> Set execute permissions for the Lua binaries bundled with this extension:</translate>
<syntaxhighlight lang="bash">chmod a+x /path/to/extensions/Scribunto/includes/Engines/LuaStandalone/binaries/yourOS/lua</syntaxhighlight><ref name="engines" />
* <translate> Set type to <tvar name=1><code>httpd_sys_script_exec_t</code></tvar> if SELinux is enforced:</translate>
<syntaxhighlight lang="bash">chcon -t httpd_sys_script_exec_t /path/to/extensions/Scribunto/includes/Engines/LuaStandalone/binaries/yourOS/lua</syntaxhighlight><ref name="engines" />|registration=Yes|no-registration-version=1.29}}

<translate>
== Optional installation == 

=== Integrating extensions === 


For a more pleasant user interface, with syntax highlighting and a code editor with autoindent, install the following extensions:
</translate>
* {{ll|Extension:WikiEditor|nsp=0}}
* {{ll|Extension:SyntaxHighlight|nsp=0}}
* {{ll|Extension:CodeEditor|nsp=0}}
{{MW version|version=1.30|comment=and before}}
<translate>

Then in your <tvar name=1><code>LocalSettings.php</code></tvar> after all the extension registrations, add:
</translate>
<syntaxhighlight lang="php">
$wgScribuntoUseGeSHi = true;
$wgScribuntoUseCodeEditor = true;
</syntaxhighlight>

<translate>
=== LuaSandbox === 
</translate>
<translate> We have developed a PHP extension written in C called LuaSandbox.</translate>
<translate> It can be used as an alternative to the standalone binary, and will provide improved performance.</translate>
<translate> See <tvar name=1>{{ll|LuaSandbox}}</tvar> for details and installation instructions.</translate>

<translate>

If you initially installed the extension to use the Lua standalone binary, be sure to update <tvar name=1><code>LocalSettings.php</code></tvar> with the following configuration setting:
</translate>
<syntaxhighlight lang="php">
$wgScribuntoDefaultEngine = 'luasandbox';
</syntaxhighlight>
<translate>
== Configuration == 


The following configuration variables are available:
</translate>
; $wgScribuntoDefaultEngine
: <translate> Select the engine.</translate> <translate> Valid values are the keys in <tvar name=1>{{phpi|$wgScribuntoEngineConf}}</tvar>, which by default are <tvar name=2><code>'luasandbox'</code></tvar> or <tvar name=3><code>'luastandalone'</code></tvar>.</translate>
; $wgScribuntoUseGeSHi
: <translate> When <tvar name=1>{{ll|Extension:SyntaxHighlight}}</tvar> is installed, set this true to use it when displaying Module pages. (MediaWiki 1.30 or earlier.)</translate>
; $wgScribuntoUseCodeEditor
: <translate> When <tvar name=1>{{ll|Extension:CodeEditor}}</tvar> is installed, set this <tvar name=2><code>true</code></tvar> to use it when editing Module pages. (MediaWiki 1.30 or earlier.)</translate>
; $wgScribuntoEngineConf
: <translate> An associative array for engine configuration.</translate> <translate> Keys are the valid values for <tvar name=1>{{phpi|$wgScribuntoDefaultEngine}}</tvar>, and values are associative arrays of configuration data.</translate> <translate> Each configuration array must contain a <tvar name=1><code>'class'</code></tvar> key naming the <tvar name=2><code>ScribuntoEngineBase</code></tvar> subclass to use.</translate>

<translate>
=== LuaStandalone === 
</translate>
<translate> The following keys are used in <tvar name=1>{{phpi|$wgScribuntoEngineConf}}</tvar> for <tvar name=2><code>Scribunto_LuaStandaloneEngine</code></tvar>.</translate>
<translate> Generally you'd set these as something like</translate>

<syntaxhighlight lang="php">
$wgScribuntoEngineConf['luastandalone']['key'] = 'value';
</syntaxhighlight>

; luaPath
: <translate> Specify the path to a Lua interpreter.</translate>
; errorFile
: <translate> Specify the path to a file, writable by the web server user, where the error and debugging output from the standalone interpreter will be logged.</translate>
: <translate> Error output produced by the standalone interpreter are not logged by default.</translate> <translate> Configure logging with:</translate>
<syntaxhighlight lang="php">
$wgScribuntoEngineConf['luastandalone']['errorFile'] = '/path/to/file.log';
</syntaxhighlight>
; memoryLimit
: <translate> Specify the memory limit in bytes for the standalone interpreter on Linux (enforced using ulimit).</translate>
; cpuLimit
: <translate> Specify the CPU time limit in seconds for the standalone interpreter on Linux (enforced using ulimit).</translate>
; allowEnvFuncs
: <translate> Set true to allow use of setfenv and getfenv in modules.</translate>

<translate>
=== LuaSandbox === 
</translate>
<translate> The following keys are used in <tvar name=1>{{phpi|$wgScribuntoEngineConf}}</tvar> for <tvar name=2><code>Scribunto_LuaSandboxEngine</code></tvar>.</translate>
<translate> Generally you'd set these as something like</translate>

<syntaxhighlight lang="php">
$wgScribuntoEngineConf['luasandbox']['<translate nowrap> key</translate>'] = '<translate nowrap> value</translate>';
</syntaxhighlight>

; memoryLimit
: <translate> Specify the memory limit in bytes.</translate>
; cpuLimit
: <translate> Specify the CPU time limit in seconds.</translate>
; profilerPeriod
: <translate> Specify the time between polls in sections for the Lua profiler.</translate>
; allowEnvFuncs
: <translate> Set true to allow use of setfenv and getfenv in modules.</translate>

<translate>
== Usage == 
</translate>
<translate> Scripts go in a new namespace called '''[[<tvar name=1>Special:PrefixIndex/Module:</tvar>|Module]]'''.</translate>
<translate> Each module has a collection of functions, which can be called using wikitext syntax such as:</translate>

{{Anchor|#invoke|.23invoke}}<nowiki>{{#invoke:</nowiki> ''Module_name'' | ''function_name'' | ''arg1'' | ''arg2'' | ''arg3'' ... }}
<translate>
== Lua == 

=== Learning Lua === 
</translate>
<translate> Lua is a simple programming language intended to be accessible to beginners.</translate>
<translate> For a quick crash-course on Lua, try [<tvar name=url>http://tylerneylon.com/a/learn-lua/</tvar> Learn Lua in 15 Minutes].</translate>

<translate> The best comprehensive introduction to Lua is the book ''Programming in Lua''.</translate>
<translate> The first edition (for Lua 5.0) is available online and is mostly relevant to Lua 5.1, the version used by Scribunto:</translate>

<translate>

* [<tvar name=url>https://www.lua.org/pil/index.html</tvar> Programming in Lua] (scroll down past the book ads to find the text)


The reference manual is also useful:
</translate>
* {{ll|Extension:Scribunto/Lua reference manual}}

<translate>
=== Lua environment === 


In Lua, the set of all global variables and functions is called an environment.
</translate>

<translate> Each <tvar name=1><code><nowiki>{{#invoke:}}</nowiki></code></tvar> call runs in a separate environment.</translate>
<translate> Variables defined in one <tvar name=1><code><nowiki>{{#invoke:}}</nowiki></code></tvar> will not be available from another.</translate>
<translate> This restriction was necessary to maintain flexibility in the wikitext parser implementation.</translate>

{{Note|1=<translate> The environment which scripts run in is not quite the same as in standard Lua.</translate> <translate> These differences are noted in [[<tvar name=1>Special:MyLanguage/Extension:Scribunto/Lua reference manual#Differences from standard Lua</tvar>|Extension:Scribunto/Lua reference manual]].</translate>}}

<translate>
=== Debug console === 
</translate>

[[File:Scribunto debug console usage example.png|thumb|<translate> Debug console usage example</translate>]]

:''<translate> See also:</translate> {{ll|Extension:Scribunto/Debug console}}''

<translate> When editing a Lua module a so-called "debug console" can be found underneath the edit form.</translate>
<translate> In this debug console Lua code can be executed without having to save or even create the Lua module in question.</translate>

<translate>
== Troubleshooting == 
</translate>
[[File:Script error clickable Scribunto.png|thumb|<translate> Troubleshooting using the clickable "Script error" link.</translate>]]

<translate>

Note that red <tvar name=1><strong class="error">{{int|scribunto-parser-dialog-title}}</strong></tvar> messages are clickable and will provide more detailed information.
</translate>

=== {{int|scribunto-luastandalone-exited||1}} ===

<translate> When using the LuaStandalone engine (this is the default), errors along the lines of '''"<tvar name=1>{{int|scribunto-luastandalone-exited||1}}</tvar>"''' may be generated if the standalone Lua interpreter cannot be executed or runs into various runtime errors.</translate>
<translate> To obtain more information, assign a file path to <tvar name=1><syntaxhighlight lang="php" inline>$wgScribuntoEngineConf['luastandalone']['errorFile']</syntaxhighlight></tvar>.</translate>
<translate> The interpreter's error output will be logged to the specified file, which should prove more helpful in tracking down the issue.</translate>
<translate> The information in the debug log includes debugging information, which is why there is so much of it.</translate>
<translate> You should be able to ignore any line beginning with "TX" or "RX".</translate>

<translate> If you're setting up Scribunto and are using IIS/Windows, this appears to be solved by commenting out [<tvar name=url>https://www.mediawiki.org/w/index.php?title=Topic:W6pj4xql1tjpvfyb&topic_showPostId=watax8fwicsi11ps#flow-post-watax8fwicsi11ps</tvar> a particular line].</translate>

=== {{int|scribunto-luastandalone-exited||2}} ===

<translate> When using the LuaStandalone engine (this is the default), status 2 suggests memory allocation errors, probably caused by settings that allocate inadequate memory space for PHP or Lua, or both.</translate>
<translate> Assigning a file path to <tvar name=1><syntaxhighlight lang="php" inline>$wgScribuntoEngineConf['luastandalone']['errorFile']</syntaxhighlight></tvar> and examining that output can be valuable in diagnosing memory allocation errors.</translate>

<translate> Increase PHP allocation in your PHP configuration; add the line <tvar name=1><code>memory_limit = 200M</code></tvar>.</translate>
<translate> This allocation of 200MB is often sufficient (as of MediaWiki 1.24) but can be increased as required.</translate>
<translate> Set Scribunto's memory allocation in <tvar name=1><code>LocalSettings.php</code></tvar> as a line:</translate>
<syntaxhighlight lang="php">
$wgScribuntoEngineConf['luastandalone']['memoryLimit'] = 209715200; # <translate nowrap> bytes</translate>
</syntaxhighlight>
<translate>

Finally, depending on the server configuration, some installations may be helped by adding another <tvar name=1><code>LocalSettings.php</code></tvar> line
</translate>
<syntaxhighlight lang="php">
$wgMaxShellMemory = 204800; # <translate nowrap> in KB</translate>
</syntaxhighlight>

<translate>

Note that all 3 memory limits are given in different units.

=== Lua error: Internal error: 2. on ARM architecture === 


If you're using an ARM architecture processor like on a RaspberryPi you'll face the error <code>Lua error: Internal error: The interpreter exited with status 2.</code> due to wrong delivered binary format of the Lua interpreter.


Check your Lua interpreter in:
</translate>
/path/to/webdir/Scribunto/includes/Engines/LuaStandalone/binaries/lua5_1_5_linux_32_generic

<translate>

Check the interpreter by using:
</translate>
file lua
<translate>

The result should look like :
</translate>
lua: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0
<translate>

The installed default Lua interpreter shows:
</translate>
lua: ELF 32-bit LSB pie executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.6.9,
<translate>

look at the "Intel 80386" part what definitely is not correct.
</translate>

<translate> Check in <tvar name=1><code>/usr/bin</code></tvar> what version of Lua is installed on your system.</translate> <translate> If you have <tvar name=1>lua5.1</tvar> installed, you can either copy the interpreter to your <tvar name=2><code>lua5_1_5_linux_32_generic</code></tvar> directory or set in your <tvar name=3>LocalSettings.php</tvar>:</translate>
<syntaxhighlight lang="php">
$wgScribuntoEngineConf['luastandalone']['luaPath'] = '/usr/bin/lua5.1'
</syntaxhighlight>

<translate>

At present don't set <tvar name=1><code>wgScribuntoEngineConf</code></tvar> to <tvar name=2>/usr/bin/lua5.3</tvar>, it'll lead to the "Internal error 1".
</translate>

=== {{int|scribunto-luastandalone-exited||24}} ===

<translate> When using the LuaStandalone engine (this is the default), status 24 suggests CPU time limit errors, although those should be generating a "The time allocated for running scripts has expired" message instead.</translate>
<translate> It would be useful to file a task in <tvar name="1">{{ll|Phabricator}}</tvar> and participate in determining why the XCPU signal isn't being caught.</translate>

=== {{int|scribunto-luastandalone-exited||126}} ===

<translate> When using the LuaStandalone engine (this is the default), errors along the lines of '''"<tvar name=1>{{int|scribunto-luastandalone-exited||126}}</tvar>"''' may be generated if the standalone Lua interpreter cannot be executed.</translate>
<translate> This generally arises from either of two causes:</translate>

<translate>

* The Lua executable file's permissions do not include Execute.</translate> <translate> Set permissions as described under [[<tvar name=1>#Installation</tvar>|#Installation]].</translate>
<translate>

* The server does not allow execution of files from the place where the executable is installed, e.g. the filesystem is mounted with the <tvar name=1><code>'noexec'</code></tvar> flag.</translate> <translate> This often occurs with shared hosted servers.</translate> <translate> Remedies include adjusting <tvar name=1><syntaxhighlight lang="php" inline>$wgScribuntoEngineConf['luastandalone']['luaPath']</syntaxhighlight></tvar> to point to a Lua 5.1 binary installed in an executable location, or adjusting or convincing the shared host to adjust the setting preventing execution.</translate>

<translate>
===Error condition such as: Fatal exception of type MWException=== 


Check the MediaWiki, PHP, or webserver logs for more details on the exception, or temporarily set <tvar name=1>{{ll|Manual:$wgShowExceptionDetails|$wgShowExceptionDetails}}</tvar> to <tvar name=2><code>true</code></tvar>.

===version <tvar name=1>'GLIBC_2.11'</tvar> not found=== 
</translate>
<translate> If the above gives you errors such as "version <tvar name=1>'GLIBC_2.11'</tvar> not found", it means the version of the standard C library on your system is too old for the binaries provided with Scribunto.</translate>
<translate> You should upgrade your C library, or use a version of Lua 5.1 compiled for the C library you do have installed.</translate>
<translate> To upgrade your C library, your best option is usually to follow your distribution's instructions for upgrading packages (or for upgrading to a new release of the distribution, if applicable).</translate>

<translate> If you copy the lua binaries from Scribunto master (or from <tvar name=1>[[gerrit:77905]]</tvar>), that should suffice, if you can't or don't want to upgrade your C library.</translate>
<translate> The distributed binaries were recently recompiled against an older version of glibc, so the minimum is now 2.3 rather than 2.11.</translate>

<translate>
=== Lua errors in Scribunto files === 


Errors here include:
</translate>
* '''<translate> attempt to index field <tvar name=1>'text'</tvar> (a nil value)</translate>'''
* '''<translate> Lua error in <tvar name=1>mw.html.lua</tvar> at line 253: Invalid class given:</translate>'''

<translate>

If you are getting errors such these when attempting to use modules imported from WMF wikis, most likely your version of Scribunto is out of date.


Upgrade if possible; for advanced users, you might also try to identify the needed newer commits and cherry-pick them into your local installation.

=== <tvar name=1>preg_replace_callback():</tvar> Compilation failed: unknown property name after <tvar name=2>\P</tvar> or <tvar name=3>\p</tvar> at offset 7 === 
</translate>
<code><translate> <tvar name=1>preg_replace_callback():</tvar> Compilation failed: unknown property name after <tvar name=2>\P</tvar> or <tvar name=3>\p</tvar> at offset 7</translate></code>
* <translate> this usually indicates an incompatible version of PCRE; you'll need to update to <tvar name=1>>= 8.10</tvar></translate>
* <translate> <tvar name=1>@todo</tvar>: link to instructions on how to upgrade</translate>

<translate>
=== Lua error === 
</translate>
<translate> If you copy templates from Wikipedia and then get big red "Lua error: x" messages where the Scribunto invocation (e.g. the template that uses <tvar name=1><code><nowiki>{{#invoke:}}</nowiki></code></tvar>) should be, that probably means that you didn't import everything you needed.</translate> <translate> Make sure that you tick the "Include templates" box at [[w:Special:Export]] when you export.</translate>

<translate>

When importing pages from another wiki, it is also possible for templates or modules in the imported data to overwrite existing templates or modules with the same title, which may break existing pages, templates, and modules that depend on the overwritten versions.

=== Blank screen === 


Make sure your extension version is applicable to your MediaWiki version.

== Design documents == 
</translate>
[[File:Linux.conf.au 2014 - Scribunto presentation.webm|thumb|<translate> <tvar name=1>[[User:Tim Starling|Tim Starling]]</tvar>'s presentation at [[w:Linux.conf.au|linux.conf.au]] 2014 discussing the motivations, implementation challenges and results of deploying Scribunto and Lua.</translate>]]{{ll|Extension:Scribunto/Parser interface design}}
{{ll|Extension:Scribunto/Victor's API proposal}}
* {{ll|Extension:Scribunto/Documentation specification}}
* {{ll|Extension:Scribunto/Tim's draft roadmap}}

<translate>
== Other pages == 
</translate>
* {{ll|Extension:Scribunto/Deployment priorities}}
* {{ll|Extension:Scribunto/Brainstorming}}
* {{ll|Lua scripting}} - <translate> Wikimedia activity page describing deployment plan to Wikimedia sites.</translate>
* {{ll|Extension:Scribunto/Lua reference manual}} - <translate> The reference about the Lua language, as well as its standard libraries and common Scribunto modules supported on Wikimedia sites.</translate>
* {{ll|Extension:Scribunto/Lua 5.2 changes}} - <translate> A list of known changes in Lua 5.2 that may cause code written in 5.1 to function unexpectedly.</translate>
* {{ll|Extension:Scribunto/Example modules}}
* {{ll|Extension:Scribunto/Example extension}} - <translate> Code for example extensions extending the Scribunto library.</translate>
* {{ll|Extension:Scribunto/We use Lua}}

<translate>
== See also == 
</translate>
; <translate> General</translate>
* {{ll|Extension:Wikibase Client/Lua|Lua Wikibase client}} - <translate> functionality for the Scribunto extension.</translate>
* <translate> [[<tvar name=1>commons:Special:MyLanguage/Commons:Lua</tvar>|Commons:Lua]] - there may be specific notes for using Lua modules on Wikimedia Commons, including additional Lua extensions installed (e.g. for local support of internationalization and for parsing or playing medias).</translate> <translate> Some general purpose modules may be reused in other wikis in various languages (except specific tunings for policies, namespaces or project/maintenance pages with dedicated names).</translate> <translate> If possible, modules that could be widely reused across wikis should be tested and internationalized on Wikimedia Commons.</translate>
* <translate> [[w:Help:Lua]] - there may be specific notes for using Lua modules on Wikipedia, including additional Lua extensions installed (including for integrating Wikidata and Wikimedia Commons contents, generating complex infoboxes and navigation boxes, or to facilitate the general administration/maintenance of the wiki contents under applicable policies).</translate> <translate> Some other localized Wikipedia editions (or other projects such Wiktionnary, Wikisource or Wikinews) may also have their own needs and Lua modules.</translate>
* <translate> [[<tvar name=1>d:Special:MyLanguage/Help:Lua</tvar>|d:Help:Lua]] - there may be specific notes for using Lua modules on Wikidata, including additional Lua extensions installed (e.g. for local support of internationalization and for database queries)</translate>
; <translate> Extensions</translate>
* {{ll|Extension:Capiunto|nsp=0}} - <translate> Provides basic [[<tvar name=1>Special:MyLanguage/Extension:Capiunto/Infobox</tvar>|infobox]] functionality for the Scribunto extension.</translate>
* {{ll|Extension:Semantic Scribunto|nsp=0}} - <translate> provides native support for the Scribunto extension for usage with <tvar name=1>{{ll|Extension:Semantic MediaWiki|nsp=0}}</tvar></translate>
* {{ll|Extension:VariablesLua|nsp=0}} - <translate> provides a Scribunto Lua interface for the Variables extension</translate>
* {{ll|Extension:Wikibase Client|nsp=0}} - <translate> provides <tvar name=1>{{ll|Wikibase}}</tvar> (part of [[<tvar name=2>m:Special:MyLanguage/Wikidata</tvar>|Wikidata]] project)</translate>

* [[Gadgets]]
* [[Widgets]]

<translate>
== External links== 
</translate>
* [https://workingwithmediawiki.com/book/chapter12.html Working with MediaWiki - Modules.]

<translate>
== Notes == 
</translate>
<references />

{{OnWikimedia}}
{{Used by}}

[[Category:Scribunto extensions{{#translation:}}| ]]
[[Category:ContentHandler extensions{{#translation:}}]]
[[Category:GPL licensed extensions{{#translation:}}]]
[[Category:MIT licensed extensions{{#translation:}}]]