mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Scribunto
synced 2024-11-15 11:59:42 +00:00
ec103b6966
It's easily possible for Lua to raise errors where the string is not valid UTF-8. When we turn that into a Scribunto_LuaError, we should normalize it so other things don't break. Bug: T208689 Change-Id: Idc5514261e99d64222b86877dd0500d425a26988
1076 lines
30 KiB
PHP
1076 lines
30 KiB
PHP
<?php
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use UtfNormal\Validator;
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use Wikimedia\ScopedCallback;
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abstract class Scribunto_LuaEngine extends ScribuntoEngineBase {
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/**
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* Libraries to load. See also the 'ScribuntoExternalLibraries' hook.
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* @var array Maps module names to PHP classes or definition arrays
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*/
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protected static $libraryClasses = [
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'mw.site' => 'Scribunto_LuaSiteLibrary',
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'mw.uri' => 'Scribunto_LuaUriLibrary',
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'mw.ustring' => 'Scribunto_LuaUstringLibrary',
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'mw.language' => 'Scribunto_LuaLanguageLibrary',
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'mw.message' => 'Scribunto_LuaMessageLibrary',
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'mw.title' => 'Scribunto_LuaTitleLibrary',
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'mw.text' => 'Scribunto_LuaTextLibrary',
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'mw.html' => 'Scribunto_LuaHtmlLibrary',
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'mw.hash' => 'Scribunto_LuaHashLibrary',
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];
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/**
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* Paths for modules that may be loaded from Lua. See also the
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* 'ScribuntoExternalLibraryPaths' hook.
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* @var array Paths
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*/
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protected static $libraryPaths = [
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'.',
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'luabit',
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'ustring',
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];
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protected $loaded = false;
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/**
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* @var Scribunto_LuaInterpreter
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*/
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protected $interpreter;
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/**
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* @var array
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*/
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protected $mw;
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/**
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* @var array
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*/
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protected $currentFrames = [];
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protected $expandCache = [];
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protected $availableLibraries = [];
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const MAX_EXPAND_CACHE_SIZE = 100;
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/**
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* If luasandbox is installed and usable then use it,
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* otherwise
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*
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* @param array $options
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* @return Scribunto_LuaEngine
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*/
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public static function newAutodetectEngine( array $options ) {
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global $wgScribuntoEngineConf;
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$engine = 'luastandalone';
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try {
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Scribunto_LuaSandboxInterpreter::checkLuaSandboxVersion();
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$engine = 'luasandbox';
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} catch ( Scribunto_LuaInterpreterNotFoundError $e ) {
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// pass
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} catch ( Scribunto_LuaInterpreterBadVersionError $e ) {
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// pass
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}
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unset( $options['factory'] );
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return Scribunto::newEngine( $options + $wgScribuntoEngineConf[$engine] );
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}
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/**
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* Create a new interpreter object
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* @return Scribunto_LuaInterpreter
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*/
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abstract protected function newInterpreter();
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/**
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* @param string $text
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* @param string|bool $chunkName
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* @return Scribunto_LuaModule
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*/
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protected function newModule( $text, $chunkName ) {
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return new Scribunto_LuaModule( $this, $text, $chunkName );
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}
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/**
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* @param string $message
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* @param array $params
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* @return Scribunto_LuaError
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*/
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public function newLuaError( $message, $params = [] ) {
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return new Scribunto_LuaError( $message, $this->getDefaultExceptionParams() + $params );
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}
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public function destroy() {
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// Break reference cycles
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$this->interpreter = null;
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$this->mw = null;
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$this->expandCache = null;
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parent::destroy();
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}
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/**
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* Initialise the interpreter and the base environment
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*/
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public function load() {
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if ( $this->loaded ) {
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return;
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}
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$this->loaded = true;
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try {
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$this->interpreter = $this->newInterpreter();
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$funcs = [
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'loadPackage',
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'loadPHPLibrary',
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'frameExists',
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'newChildFrame',
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'getExpandedArgument',
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'getAllExpandedArguments',
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'expandTemplate',
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'callParserFunction',
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'preprocess',
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'incrementExpensiveFunctionCount',
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'isSubsting',
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'getFrameTitle',
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'setTTL',
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'addWarning',
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];
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$lib = [];
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foreach ( $funcs as $name ) {
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$lib[$name] = [ $this, $name ];
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}
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$this->registerInterface( 'mwInit.lua', [] );
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$this->mw = $this->registerInterface( 'mw.lua', $lib,
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[ 'allowEnvFuncs' => $this->options['allowEnvFuncs'] ] );
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$this->availableLibraries = $this->getLibraries( 'lua', self::$libraryClasses );
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foreach ( $this->availableLibraries as $name => $def ) {
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$this->instantiatePHPLibrary( $name, $def, false );
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}
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} catch ( Exception $ex ) {
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$this->loaded = false;
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$this->interpreter = null;
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throw $ex;
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}
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}
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/**
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* Register a Lua Library
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*
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* This should be called from the library's PHP module's register() method.
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*
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* The value for $interfaceFuncs is used to populate the mw_interface
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* global that is defined when the library's Lua module is loaded. Values
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* must be PHP callables, which will be seen in Lua as functions.
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*
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* @param string $moduleFileName The path to the Lua portion of the library
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* (absolute, or relative to $this->getLuaLibDir())
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* @param array $interfaceFuncs Populates mw_interface
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* @param array $setupOptions Passed to the modules setupInterface() method.
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* @return array Lua package
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*/
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public function registerInterface( $moduleFileName, $interfaceFuncs, $setupOptions = [] ) {
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$this->interpreter->registerLibrary( 'mw_interface', $interfaceFuncs );
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$moduleFileName = $this->normalizeModuleFileName( $moduleFileName );
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$package = $this->loadLibraryFromFile( $moduleFileName );
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if ( !empty( $package['setupInterface'] ) ) {
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$this->interpreter->callFunction( $package['setupInterface'], $setupOptions );
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}
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return $package;
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}
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/**
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* Return the base path for Lua modules.
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* @return string
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*/
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public function getLuaLibDir() {
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return __DIR__ . '/lualib';
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}
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/**
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* Normalize a lua module to its full path. If path does not look like an
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* absolute path (i.e. begins with DIRECTORY_SEPARATOR or "X:"), prepend
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* getLuaLibDir()
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*
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* @param string $fileName name of the lua module file
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* @return string
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*/
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protected function normalizeModuleFileName( $fileName ) {
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if ( !preg_match( '<^(?:[a-zA-Z]:)?' . preg_quote( DIRECTORY_SEPARATOR ) . '>', $fileName ) ) {
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$fileName = "{$this->getLuaLibDir()}/{$fileName}";
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}
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return $fileName;
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}
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/**
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* Get performance characteristics of the Lua engine/interpreter
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*
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* phpCallsRequireSerialization: boolean
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* whether calls between PHP and Lua functions require (slow)
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* serialization of parameters and return values
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*
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* @return array
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*/
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abstract public function getPerformanceCharacteristics();
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/**
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* Get the current interpreter object
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* @return Scribunto_LuaInterpreter
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*/
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public function getInterpreter() {
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$this->load();
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return $this->interpreter;
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}
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/**
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* Replaces the list of current frames, and return a ScopedCallback that
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* will reset them when it goes out of scope.
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*
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* @param PPFrame|null $frame If null, an empty frame with no parent will be used
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* @return ScopedCallback
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*/
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private function setupCurrentFrames( PPFrame $frame = null ) {
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if ( !$frame ) {
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$frame = $this->getParser()->getPreprocessor()->newFrame();
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}
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$oldFrames = $this->currentFrames;
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$oldExpandCache = $this->expandCache;
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$this->currentFrames = [
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'current' => $frame,
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'parent' => isset( $frame->parent ) ? $frame->parent : null,
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];
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$this->expandCache = [];
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return new ScopedCallback( function () use ( $oldFrames, $oldExpandCache ) {
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$this->currentFrames = $oldFrames;
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$this->expandCache = $oldExpandCache;
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} );
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}
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/**
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* Execute a module chunk in a new isolated environment, and return the specified function
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* @param mixed $chunk As accepted by Scribunto_LuaInterpreter::callFunction()
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* @param string $functionName
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* @param PPFrame|null $frame
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* @return mixed
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* @throws ScribuntoException
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*/
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public function executeModule( $chunk, $functionName, $frame ) {
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$resetFrames = null;
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if ( !$this->currentFrames || !isset( $this->currentFrames['current'] ) ) {
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// Only reset frames if there isn't already current frame
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// $resetFrames is a ScopedCallback, so it has a purpose even though it appears unused.
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$resetFrames = $this->setupCurrentFrames( $frame );
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}
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$retval = $this->getInterpreter()->callFunction(
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$this->mw['executeModule'], $chunk, $functionName
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);
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if ( !$retval[0] ) {
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// If we get here, it means we asked for an element from the table the module returned,
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// but it returned something other than a table. In this case, $retval[1] contains the type
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// of what it did returned, instead of the value we asked for.
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throw $this->newException(
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'scribunto-lua-notarrayreturn', [ 'args' => [ $retval[1] ] ]
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);
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}
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return $retval[1];
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}
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/**
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* Execute a module function chunk
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* @param mixed $chunk As accepted by Scribunto_LuaInterpreter::callFunction()
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* @param PPFrame|null $frame
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* @return array
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*/
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public function executeFunctionChunk( $chunk, $frame ) {
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// $resetFrames is a ScopedCallback, so it has a purpose even though it appears unused.
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$resetFrames = $this->setupCurrentFrames( $frame );
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return $this->getInterpreter()->callFunction(
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$this->mw['executeFunction'],
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$chunk );
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}
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/**
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* Get data logged by modules
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* @return string Logged data
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*/
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protected function getLogBuffer() {
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if ( !$this->loaded ) {
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return '';
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}
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try {
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$log = $this->getInterpreter()->callFunction( $this->mw['getLogBuffer'] );
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return $log[0];
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} catch ( ScribuntoException $ex ) {
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// Probably time expired, ignore it.
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return '';
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}
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}
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/**
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* Format the logged data for HTML output
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* @param string $logs Logged data
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* @param bool $localize Whether to localize the message key
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* @return string HTML
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*/
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protected function formatHtmlLogs( $logs, $localize ) {
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$keyMsg = wfMessage( 'scribunto-limitreport-logs' );
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if ( !$localize ) {
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$keyMsg->inLanguage( 'en' )->useDatabase( false );
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}
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return Html::openElement( 'tr' ) .
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Html::rawElement( 'th', [ 'colspan' => 2 ], $keyMsg->parse() ) .
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Html::closeElement( 'tr' ) .
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Html::openElement( 'tr' ) .
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Html::openElement( 'td', [ 'colspan' => 2 ] ) .
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Html::openElement( 'div', [ 'class' => 'mw-collapsible mw-collapsed' ] ) .
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Html::element( 'pre', [ 'class' => 'scribunto-limitreport-logs' ], $logs ) .
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Html::closeElement( 'div' ) .
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Html::closeElement( 'td' ) .
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Html::closeElement( 'tr' );
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}
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/**
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* Load a library from the given file and execute it in the base environment.
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* @param string $fileName File name/path to load
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* @return array|null the export list, or null if there isn't one.
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*/
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protected function loadLibraryFromFile( $fileName ) {
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static $cache = null;
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if ( !$cache ) {
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$cache = ObjectCache::getLocalServerInstance( 'hash' );
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}
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$mtime = filemtime( $fileName );
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if ( $mtime === false ) {
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throw new MWException( 'Lua file does not exist: ' . $fileName );
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}
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$cacheKey = $cache->makeGlobalKey( __CLASS__, $fileName );
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$fileData = $cache->get( $cacheKey );
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$code = false;
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if ( $fileData ) {
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list( $code, $cachedMtime ) = $fileData;
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if ( $cachedMtime < $mtime ) {
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$code = false;
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}
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}
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if ( !$code ) {
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$code = file_get_contents( $fileName );
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if ( $code === false ) {
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throw new MWException( 'Lua file does not exist: ' . $fileName );
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}
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$cache->set( $cacheKey, [ $code, $mtime ], 60 * 5 );
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}
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# Prepending an "@" to the chunk name makes Lua think it is a filename
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$module = $this->getInterpreter()->loadString( $code, '@' . basename( $fileName ) );
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$ret = $this->getInterpreter()->callFunction( $module );
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return isset( $ret[0] ) ? $ret[0] : null;
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}
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public function getGeSHiLanguage() {
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return 'lua';
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}
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public function getCodeEditorLanguage() {
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return 'lua';
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}
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public function runConsole( array $params ) {
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// $resetFrames is a ScopedCallback, so it has a purpose even though it appears unused.
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$resetFrames = $this->setupCurrentFrames();
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/**
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* TODO: provide some means for giving correct line numbers for errors
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* in console input, and for producing an informative error message
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* if there is an error in prevQuestions.
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*
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* Maybe each console line could be evaluated as a different chunk,
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* apparently that's what lua.c does.
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*/
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$code = "return function (__init, exe)\n" .
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"if not exe then exe = function(...) return true, ... end end\n" .
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"local p = select(2, exe(__init) )\n" .
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"__init, exe = nil, nil\n" .
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"local print = mw.log\n";
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foreach ( $params['prevQuestions'] as $q ) {
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if ( substr( $q, 0, 1 ) === '=' ) {
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$code .= "print(" . substr( $q, 1 ) . ")";
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} else {
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$code .= $q;
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}
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$code .= "\n";
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}
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$code .= "mw.clearLogBuffer()\n";
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if ( substr( $params['question'], 0, 1 ) === '=' ) {
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// Treat a statement starting with "=" as a return statement, like in lua.c
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$code .= "local ret = mw.allToString(" . substr( $params['question'], 1 ) . ")\n" .
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"return ret, mw.getLogBuffer()\n";
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} else {
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$code .= $params['question'] . "\n" .
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"return nil, mw.getLogBuffer()\n";
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}
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$code .= "end\n";
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if ( $params['title']->hasContentModel( CONTENT_MODEL_SCRIBUNTO ) ) {
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$contentModule = $this->newModule(
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$params['content'], $params['title']->getPrefixedDBkey() );
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$contentInit = $contentModule->getInitChunk();
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$contentExe = $this->mw['executeModule'];
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} else {
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$contentInit = $params['content'];
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$contentExe = null;
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}
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$consoleModule = $this->newModule(
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$code,
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wfMessage( 'scribunto-console-current-src' )->text()
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);
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$consoleInit = $consoleModule->getInitChunk();
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$ret = $this->getInterpreter()->callFunction( $this->mw['executeModule'], $consoleInit, false );
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$func = $ret[1];
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$ret = $this->getInterpreter()->callFunction( $func, $contentInit, $contentExe );
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return [
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'return' => isset( $ret[0] ) ? $ret[0] : null,
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'print' => isset( $ret[1] ) ? $ret[1] : '',
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];
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}
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/**
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* Workalike for luaL_checktype()
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*
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* @param string $funcName The Lua function name, for use in error messages
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* @param array $args The argument array
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* @param int $index0 The zero-based argument index
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* @param string|array $type The allowed type names as given by gettype()
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* @param string $msgType The type name used in the error message
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* @throws Scribunto_LuaError
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*/
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public function checkType( $funcName, $args, $index0, $type, $msgType ) {
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if ( !is_array( $type ) ) {
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$type = [ $type ];
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}
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if ( !isset( $args[$index0] ) || !in_array( gettype( $args[$index0] ), $type, true ) ) {
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$index1 = $index0 + 1;
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throw new Scribunto_LuaError( "bad argument #$index1 to '$funcName' ($msgType expected)" );
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}
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}
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/**
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* Workalike for luaL_checkstring()
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*
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* @param string $funcName The Lua function name, for use in error messages
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* @param array $args The argument array
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* @param int $index0 The zero-based argument index
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*/
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public function checkString( $funcName, $args, $index0 ) {
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$this->checkType( $funcName, $args, $index0, 'string', 'string' );
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}
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/**
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* Workalike for luaL_checknumber()
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*
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* @param string $funcName The Lua function name, for use in error messages
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* @param array $args The argument array
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* @param int $index0 The zero-based argument index
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*/
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public function checkNumber( $funcName, $args, $index0 ) {
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$this->checkType( $funcName, $args, $index0, [ 'integer', 'double' ], 'number' );
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}
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|
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/**
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* Instantiate and register a library.
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* @param string $name
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* @param array|string $def
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* @param bool $loadDeferred
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* @throws MWException
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* @return array|null
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*/
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private function instantiatePHPLibrary( $name, $def, $loadDeferred ) {
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$def = $this->availableLibraries[$name];
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if ( is_string( $def ) ) {
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$class = new $def( $this );
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} else {
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if ( !$loadDeferred && !empty( $def['deferLoad'] ) ) {
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return null;
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}
|
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if ( isset( $def['class'] ) ) {
|
|
$class = new $def['class']( $this );
|
|
} else {
|
|
throw new MWException( "No class for library \"$name\"" );
|
|
}
|
|
}
|
|
return $class->register();
|
|
}
|
|
|
|
/**
|
|
* Handler for the loadPHPLibrary() callback. Register the specified
|
|
* library and return its function table. It's not necessary to cache the
|
|
* function table in the object instance, since there is caching in a
|
|
* wrapper on the Lua side.
|
|
* @internal
|
|
* @param string $name
|
|
* @return array
|
|
*/
|
|
public function loadPHPLibrary( $name ) {
|
|
$args = func_get_args();
|
|
$this->checkString( 'loadPHPLibrary', $args, 0 );
|
|
|
|
$ret = null;
|
|
if ( isset( $this->availableLibraries[$name] ) ) {
|
|
$ret = $this->instantiatePHPLibrary( $name, $this->availableLibraries[$name], true );
|
|
}
|
|
|
|
return [ $ret ];
|
|
}
|
|
|
|
/**
|
|
* Handler for the loadPackage() callback. Load the specified
|
|
* module and return its chunk. It's not necessary to cache the resulting
|
|
* chunk in the object instance, since there is caching in a wrapper on the
|
|
* Lua side.
|
|
* @internal
|
|
* @param string $name
|
|
* @return array
|
|
*/
|
|
public function loadPackage( $name ) {
|
|
$args = func_get_args();
|
|
$this->checkString( 'loadPackage', $args, 0 );
|
|
|
|
# This is what Lua does for its built-in loaders
|
|
$luaName = str_replace( '.', '/', $name ) . '.lua';
|
|
$paths = $this->getLibraryPaths( 'lua', self::$libraryPaths );
|
|
foreach ( $paths as $path ) {
|
|
$fileName = $this->normalizeModuleFileName( "$path/$luaName" );
|
|
if ( !file_exists( $fileName ) ) {
|
|
continue;
|
|
}
|
|
$code = file_get_contents( $fileName );
|
|
$init = $this->interpreter->loadString( $code, "@$luaName" );
|
|
return [ $init ];
|
|
}
|
|
|
|
$title = Title::newFromText( $name );
|
|
if ( !$title || !$title->hasContentModel( CONTENT_MODEL_SCRIBUNTO ) ) {
|
|
return [];
|
|
}
|
|
|
|
$module = $this->fetchModuleFromParser( $title );
|
|
if ( $module ) {
|
|
/** @suppress PhanUndeclaredMethod */
|
|
return [ $module->getInitChunk() ];
|
|
} else {
|
|
return [];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helper function for the implementation of frame methods
|
|
*
|
|
* @param string $frameId
|
|
* @return PPFrame
|
|
*
|
|
* @throws Scribunto_LuaError
|
|
*/
|
|
protected function getFrameById( $frameId ) {
|
|
if ( $frameId === 'empty' ) {
|
|
return $this->getParser()->getPreprocessor()->newFrame();
|
|
} elseif ( isset( $this->currentFrames[$frameId] ) ) {
|
|
return $this->currentFrames[$frameId];
|
|
} else {
|
|
throw new Scribunto_LuaError( 'invalid frame ID' );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handler for frameExists()
|
|
*
|
|
* @internal
|
|
* @param string $frameId
|
|
* @return array
|
|
*/
|
|
public function frameExists( $frameId ) {
|
|
return [ $frameId === 'empty' || isset( $this->currentFrames[$frameId] ) ];
|
|
}
|
|
|
|
/**
|
|
* Handler for newChildFrame()
|
|
*
|
|
* @internal
|
|
* @param string $frameId
|
|
* @param string $title
|
|
* @param array $args
|
|
* @return array
|
|
* @throws Scribunto_LuaError
|
|
*/
|
|
public function newChildFrame( $frameId, $title, array $args ) {
|
|
if ( count( $this->currentFrames ) > 100 ) {
|
|
throw new Scribunto_LuaError( 'newChild: too many frames' );
|
|
}
|
|
|
|
$frame = $this->getFrameById( $frameId );
|
|
if ( $title === false ) {
|
|
$title = $frame->getTitle();
|
|
} else {
|
|
$title = Title::newFromText( $title );
|
|
if ( !$title ) {
|
|
throw new Scribunto_LuaError( 'newChild: invalid title' );
|
|
}
|
|
}
|
|
$args = $this->getParser()->getPreprocessor()->newPartNodeArray( $args );
|
|
$newFrame = $frame->newChild( $args, $title );
|
|
$newFrameId = 'frame' . count( $this->currentFrames );
|
|
$this->currentFrames[$newFrameId] = $newFrame;
|
|
return [ $newFrameId ];
|
|
}
|
|
|
|
/**
|
|
* Handler for getTitle()
|
|
*
|
|
* @internal
|
|
* @param string $frameId
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getFrameTitle( $frameId ) {
|
|
$frame = $this->getFrameById( $frameId );
|
|
return [ $frame->getTitle()->getPrefixedText() ];
|
|
}
|
|
|
|
/**
|
|
* Handler for setTTL()
|
|
* @internal
|
|
* @param int $ttl
|
|
*/
|
|
public function setTTL( $ttl ) {
|
|
$args = func_get_args();
|
|
$this->checkNumber( 'setTTL', $args, 0 );
|
|
|
|
$frame = $this->getFrameById( 'current' );
|
|
$frame->setTTL( $ttl );
|
|
}
|
|
|
|
/**
|
|
* Handler for getExpandedArgument()
|
|
* @internal
|
|
* @param string $frameId
|
|
* @param string $name
|
|
* @return array
|
|
*/
|
|
public function getExpandedArgument( $frameId, $name ) {
|
|
$args = func_get_args();
|
|
$this->checkString( 'getExpandedArgument', $args, 0 );
|
|
|
|
$frame = $this->getFrameById( $frameId );
|
|
$this->getInterpreter()->pauseUsageTimer();
|
|
$result = $frame->getArgument( $name );
|
|
if ( $result === false ) {
|
|
return [];
|
|
} else {
|
|
return [ $result ];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handler for getAllExpandedArguments()
|
|
* @internal
|
|
* @param string $frameId
|
|
* @return array
|
|
*/
|
|
public function getAllExpandedArguments( $frameId ) {
|
|
$frame = $this->getFrameById( $frameId );
|
|
$this->getInterpreter()->pauseUsageTimer();
|
|
return [ $frame->getArguments() ];
|
|
}
|
|
|
|
/**
|
|
* Handler for expandTemplate()
|
|
* @internal
|
|
* @param string $frameId
|
|
* @param string $titleText
|
|
* @param array $args
|
|
* @return array
|
|
* @throws Scribunto_LuaError
|
|
*/
|
|
public function expandTemplate( $frameId, $titleText, $args ) {
|
|
$frame = $this->getFrameById( $frameId );
|
|
$title = Title::newFromText( $titleText, NS_TEMPLATE );
|
|
if ( !$title ) {
|
|
throw new Scribunto_LuaError( "expandTemplate: invalid title \"$titleText\"" );
|
|
}
|
|
|
|
if ( $frame->depth >= $this->parser->mOptions->getMaxTemplateDepth() ) {
|
|
throw new Scribunto_LuaError( 'expandTemplate: template depth limit exceeded' );
|
|
}
|
|
if ( MWNamespace::isNonincludable( $title->getNamespace() ) ) {
|
|
throw new Scribunto_LuaError( 'expandTemplate: template inclusion denied' );
|
|
}
|
|
|
|
list( $dom, $finalTitle ) = $this->parser->getTemplateDom( $title );
|
|
if ( $dom === false ) {
|
|
throw new Scribunto_LuaError( "expandTemplate: template \"$titleText\" does not exist" );
|
|
}
|
|
if ( !$frame->loopCheck( $finalTitle ) ) {
|
|
throw new Scribunto_LuaError( 'expandTemplate: template loop detected' );
|
|
}
|
|
|
|
$fargs = $this->getParser()->getPreprocessor()->newPartNodeArray( $args );
|
|
$newFrame = $frame->newChild( $fargs, $finalTitle );
|
|
$text = $this->doCachedExpansion( $newFrame, $dom,
|
|
[
|
|
'frameId' => $frameId,
|
|
'template' => $finalTitle->getPrefixedDBkey(),
|
|
'args' => $args
|
|
] );
|
|
return [ $text ];
|
|
}
|
|
|
|
/**
|
|
* Handler for callParserFunction()
|
|
* @internal
|
|
* @param string $frameId
|
|
* @param string $function
|
|
* @param array $args
|
|
* @throws MWException
|
|
* @throws Scribunto_LuaError
|
|
* @return array
|
|
*/
|
|
public function callParserFunction( $frameId, $function, $args ) {
|
|
$frame = $this->getFrameById( $frameId );
|
|
|
|
# Make zero-based, without screwing up named args
|
|
$args = array_merge( [], $args );
|
|
|
|
# Sort, since we can't rely on the order coming in from Lua
|
|
uksort( $args, function ( $a, $b ) {
|
|
if ( is_int( $a ) !== is_int( $b ) ) {
|
|
return is_int( $a ) ? -1 : 1;
|
|
}
|
|
if ( is_int( $a ) ) {
|
|
return $a - $b;
|
|
}
|
|
return strcmp( $a, $b );
|
|
} );
|
|
|
|
# Be user-friendly
|
|
$colonPos = strpos( $function, ':' );
|
|
if ( $colonPos !== false ) {
|
|
array_unshift( $args, trim( substr( $function, $colonPos + 1 ) ) );
|
|
$function = substr( $function, 0, $colonPos );
|
|
}
|
|
if ( !isset( $args[0] ) ) {
|
|
# It's impossible to call a parser function from wikitext without
|
|
# supplying an arg 0. Insist that one be provided via Lua, too.
|
|
throw new Scribunto_LuaError( 'callParserFunction: At least one unnamed parameter ' .
|
|
'(the parameter that comes after the colon in wikitext) ' .
|
|
'must be provided'
|
|
);
|
|
}
|
|
|
|
$result = $this->parser->callParserFunction( $frame, $function, $args );
|
|
if ( !$result['found'] ) {
|
|
throw new Scribunto_LuaError( "callParserFunction: function \"$function\" was not found" );
|
|
}
|
|
|
|
# Set defaults for various flags
|
|
$result += [
|
|
'nowiki' => false,
|
|
'isChildObj' => false,
|
|
'isLocalObj' => false,
|
|
'isHTML' => false,
|
|
'title' => false,
|
|
];
|
|
|
|
$text = $result['text'];
|
|
if ( $result['isChildObj'] ) {
|
|
$fargs = $this->getParser()->getPreprocessor()->newPartNodeArray( $args );
|
|
$newFrame = $frame->newChild( $fargs, $result['title'] );
|
|
if ( $result['nowiki'] ) {
|
|
$text = $newFrame->expand( $text, PPFrame::RECOVER_ORIG );
|
|
} else {
|
|
$text = $newFrame->expand( $text );
|
|
}
|
|
}
|
|
if ( $result['isLocalObj'] && $result['nowiki'] ) {
|
|
$text = $frame->expand( $text, PPFrame::RECOVER_ORIG );
|
|
$result['isLocalObj'] = false;
|
|
}
|
|
|
|
# Replace raw HTML by a placeholder
|
|
if ( $result['isHTML'] ) {
|
|
$text = $this->parser->insertStripItem( $text );
|
|
} elseif ( $result['nowiki'] ) {
|
|
# Escape nowiki-style return values
|
|
$text = wfEscapeWikiText( $text );
|
|
}
|
|
|
|
if ( $result['isLocalObj'] ) {
|
|
$text = $frame->expand( $text );
|
|
}
|
|
|
|
return [ "$text" ];
|
|
}
|
|
|
|
/**
|
|
* Handler for preprocess()
|
|
* @internal
|
|
* @param string $frameId
|
|
* @param string $text
|
|
* @return array
|
|
* @throws Scribunto_LuaError
|
|
*/
|
|
public function preprocess( $frameId, $text ) {
|
|
$args = func_get_args();
|
|
$this->checkString( 'preprocess', $args, 0 );
|
|
|
|
$frame = $this->getFrameById( $frameId );
|
|
|
|
if ( !$frame ) {
|
|
throw new Scribunto_LuaError( 'attempt to call mw.preprocess with no frame' );
|
|
}
|
|
|
|
// Don't count the time for expanding all the frame arguments against
|
|
// the Lua time limit.
|
|
$this->getInterpreter()->pauseUsageTimer();
|
|
$frame->getArguments();
|
|
$this->getInterpreter()->unpauseUsageTimer();
|
|
|
|
$text = $this->doCachedExpansion( $frame, $text,
|
|
[
|
|
'frameId' => $frameId,
|
|
'inputText' => $text
|
|
] );
|
|
return [ $text ];
|
|
}
|
|
|
|
/**
|
|
* Increment the expensive function count, and throw if limit exceeded
|
|
*
|
|
* @internal
|
|
* @throws Scribunto_LuaError
|
|
* @return null
|
|
*/
|
|
public function incrementExpensiveFunctionCount() {
|
|
if ( !$this->getParser()->incrementExpensiveFunctionCount() ) {
|
|
throw new Scribunto_LuaError( "too many expensive function calls" );
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Adds a warning to be displayed upon preview
|
|
*
|
|
* @internal
|
|
* @param string $text wikitext
|
|
*/
|
|
public function addWarning( $text ) {
|
|
$this->getParser()->getOutput()->addWarning( $text );
|
|
}
|
|
|
|
/**
|
|
* Return whether the parser is currently substing
|
|
*
|
|
* @internal
|
|
* @return array
|
|
*/
|
|
public function isSubsting() {
|
|
// See Parser::braceSubstitution, OT_WIKI is the switch
|
|
return [ $this->getParser()->OutputType() === Parser::OT_WIKI ];
|
|
}
|
|
|
|
private function doCachedExpansion( $frame, $input, $cacheKey ) {
|
|
$hash = md5( serialize( $cacheKey ) );
|
|
if ( isset( $this->expandCache[$hash] ) ) {
|
|
return $this->expandCache[$hash];
|
|
}
|
|
|
|
if ( is_scalar( $input ) ) {
|
|
$input = str_replace( [ "\r\n", "\r" ], "\n", $input );
|
|
$dom = $this->parser->getPreprocessor()->preprocessToObj(
|
|
$input, $frame->depth ? Parser::PTD_FOR_INCLUSION : 0 );
|
|
} else {
|
|
$dom = $input;
|
|
}
|
|
$ret = $frame->expand( $dom );
|
|
if ( !$frame->isVolatile() ) {
|
|
if ( count( $this->expandCache ) > self::MAX_EXPAND_CACHE_SIZE ) {
|
|
reset( $this->expandCache );
|
|
$oldHash = key( $this->expandCache );
|
|
unset( $this->expandCache[$oldHash] );
|
|
}
|
|
$this->expandCache[$hash] = $ret;
|
|
}
|
|
return $ret;
|
|
}
|
|
}
|
|
|
|
class Scribunto_LuaModule extends ScribuntoModuleBase {
|
|
/**
|
|
* @var mixed
|
|
*/
|
|
protected $initChunk;
|
|
|
|
/**
|
|
* @var Scribunto_LuaEngine
|
|
*/
|
|
protected $engine;
|
|
|
|
/**
|
|
* @param Scribunto_LuaEngine $engine
|
|
* @param string $code
|
|
* @param string|bool $chunkName
|
|
*/
|
|
public function __construct( Scribunto_LuaEngine $engine, $code, $chunkName ) {
|
|
parent::__construct( $engine, $code, $chunkName );
|
|
}
|
|
|
|
public function validate() {
|
|
try {
|
|
$this->getInitChunk();
|
|
} catch ( ScribuntoException $e ) {
|
|
return $e->toStatus();
|
|
}
|
|
return Status::newGood();
|
|
}
|
|
|
|
/**
|
|
* Get the chunk which, when called, will return the export table.
|
|
* @return mixed
|
|
*/
|
|
public function getInitChunk() {
|
|
if ( !$this->initChunk ) {
|
|
$this->initChunk = $this->engine->getInterpreter()->loadString(
|
|
$this->code,
|
|
// Prepending an "=" to the chunk name avoids truncation or a "[string" prefix
|
|
'=' . $this->chunkName );
|
|
}
|
|
return $this->initChunk;
|
|
}
|
|
|
|
/**
|
|
* Invoke a function within the module. Return the expanded wikitext result.
|
|
*
|
|
* @param string $name
|
|
* @param PPFrame $frame
|
|
* @throws ScribuntoException
|
|
* @return string|null
|
|
*/
|
|
public function invoke( $name, $frame ) {
|
|
$ret = $this->engine->executeModule( $this->getInitChunk(), $name, $frame );
|
|
|
|
if ( !isset( $ret ) ) {
|
|
throw $this->engine->newException(
|
|
'scribunto-common-nosuchfunction', [ 'args' => [ $name ] ]
|
|
);
|
|
}
|
|
if ( !$this->engine->getInterpreter()->isLuaFunction( $ret ) ) {
|
|
throw $this->engine->newException(
|
|
'scribunto-common-notafunction', [ 'args' => [ $name ] ]
|
|
);
|
|
}
|
|
|
|
$result = $this->engine->executeFunctionChunk( $ret, $frame );
|
|
if ( isset( $result[0] ) ) {
|
|
return $result[0];
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
class Scribunto_LuaError extends ScribuntoException {
|
|
public $luaMessage, $lineMap = [];
|
|
|
|
public function __construct( $message, array $options = [] ) {
|
|
$this->luaMessage = $message;
|
|
$options = $options + [ 'args' => [ Validator::cleanUp( $message ) ] ];
|
|
if ( isset( $options['module'] ) && isset( $options['line'] ) ) {
|
|
$msg = 'scribunto-lua-error-location';
|
|
} else {
|
|
$msg = 'scribunto-lua-error';
|
|
}
|
|
|
|
parent::__construct( $msg, $options );
|
|
}
|
|
|
|
public function getLuaMessage() {
|
|
return $this->luaMessage;
|
|
}
|
|
|
|
public function setLineMap( $map ) {
|
|
$this->lineMap = $map;
|
|
}
|
|
|
|
/**
|
|
* @param array $options Options for message processing. Currently supports:
|
|
* $options['msgOptions']['content'] to use content language.
|
|
* @return bool|string
|
|
*/
|
|
public function getScriptTraceHtml( $options = [] ) {
|
|
if ( !isset( $this->params['trace'] ) ) {
|
|
return false;
|
|
}
|
|
if ( isset( $options['msgOptions'] ) ) {
|
|
$msgOptions = $options['msgOptions'];
|
|
} else {
|
|
$msgOptions = [];
|
|
}
|
|
|
|
$s = '<ol class="scribunto-trace">';
|
|
foreach ( $this->params['trace'] as $info ) {
|
|
$short_src = $srcdefined = $info['short_src'];
|
|
$currentline = $info['currentline'];
|
|
|
|
$src = htmlspecialchars( $short_src );
|
|
if ( $currentline > 0 ) {
|
|
$src .= ':' . htmlspecialchars( $currentline );
|
|
|
|
$title = Title::newFromText( $short_src );
|
|
if ( $title && $title->hasContentModel( CONTENT_MODEL_SCRIBUNTO ) ) {
|
|
$title = $title->createFragmentTarget( 'mw-ce-l' . $currentline );
|
|
$src = Html::rawElement( 'a',
|
|
[ 'href' => $title->getFullURL( 'action=edit' ) ],
|
|
$src );
|
|
}
|
|
}
|
|
|
|
if ( strval( $info['namewhat'] ) !== '' ) {
|
|
$function = wfMessage( 'scribunto-lua-in-function', wfEscapeWikiText( $info['name'] ) );
|
|
in_array( 'content', $msgOptions ) ?
|
|
$function = $function->inContentLanguage()->plain() :
|
|
$function = $function->plain();
|
|
} elseif ( $info['what'] == 'main' ) {
|
|
$function = wfMessage( 'scribunto-lua-in-main' );
|
|
in_array( 'content', $msgOptions ) ?
|
|
$function = $function->inContentLanguage()->plain() :
|
|
$function = $function->plain();
|
|
} else {
|
|
// C function, tail call, or a Lua function where Lua can't
|
|
// guess the name
|
|
$function = '?';
|
|
}
|
|
|
|
$backtraceLine = wfMessage( 'scribunto-lua-backtrace-line' )
|
|
->rawParams( "<strong>$src</strong>" )
|
|
->params( $function );
|
|
in_array( 'content', $msgOptions ) ?
|
|
$backtraceLine = $backtraceLine->inContentLanguage()->parse() :
|
|
$backtraceLine = $backtraceLine->parse();
|
|
|
|
$s .= "<li>$backtraceLine</li>";
|
|
}
|
|
$s .= '</ol>';
|
|
return $s;
|
|
}
|
|
}
|