mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Scribunto
synced 2024-11-29 10:34:21 +00:00
8c2300e320
The package module is loaded into the "base" environment but not correctly initialized, so interface modules and the console cannot actually load anything. Change-Id: I92a47d318ccadd7361edb1ac3b0e4bb304ff8a9c
523 lines
15 KiB
PHP
523 lines
15 KiB
PHP
<?php
|
|
|
|
abstract class Scribunto_LuaEngine extends ScribuntoEngineBase {
|
|
protected $loaded = false;
|
|
protected $executeModuleFunc, $interpreter;
|
|
protected $mw;
|
|
protected $currentFrame = false;
|
|
protected $expandCache = array();
|
|
|
|
const MAX_EXPAND_CACHE_SIZE = 100;
|
|
|
|
var $libraryPaths = array(
|
|
'.',
|
|
'luabit',
|
|
'stringtools',
|
|
);
|
|
|
|
/**
|
|
* Create a new interpreter object
|
|
*/
|
|
abstract function newInterpreter();
|
|
|
|
protected function newModule( $text, $chunkName ) {
|
|
return new Scribunto_LuaModule( $this, $text, $chunkName );
|
|
}
|
|
|
|
public function newLuaError( $message, $params = array() ) {
|
|
return new Scribunto_LuaError( $message, $this->getDefaultExceptionParams() + $params );
|
|
}
|
|
|
|
public function destroy() {
|
|
// Break reference cycles
|
|
$this->interpreter = null;
|
|
$this->executeModuleFunc = null;
|
|
$this->mw = null;
|
|
$this->expandCache = null;
|
|
parent::destroy();
|
|
}
|
|
|
|
/**
|
|
* Initialise the interpreter and the base environment
|
|
*/
|
|
public function load() {
|
|
if( $this->loaded ) {
|
|
return;
|
|
}
|
|
$this->loaded = true;
|
|
|
|
$this->interpreter = $this->newInterpreter();
|
|
$this->mw = $this->loadLibraryFromFile( $this->getLuaLibDir() . '/mw.lua' );
|
|
|
|
$this->interpreter->registerLibrary( 'mw_php',
|
|
array(
|
|
'loadPackage' => array( $this, 'loadPackage' ),
|
|
'parentFrameExists' => array( $this, 'parentFrameExists' ),
|
|
'getExpandedArgument' => array( $this, 'getExpandedArgument' ),
|
|
'getAllExpandedArguments' => array( $this, 'getAllExpandedArguments' ),
|
|
'expandTemplate' => array( $this, 'expandTemplate' ),
|
|
'preprocess' => array( $this, 'preprocess' ),
|
|
) );
|
|
|
|
$this->interpreter->callFunction( $this->mw['setup'],
|
|
array( 'allowEnvFuncs' => $this->options['allowEnvFuncs'] ) );
|
|
}
|
|
|
|
public function getLuaLibDir() {
|
|
return dirname( __FILE__ ) .'/lualib';
|
|
}
|
|
|
|
/**
|
|
* Get the current interpreter object
|
|
*/
|
|
public function getInterpreter() {
|
|
$this->load();
|
|
return $this->interpreter;
|
|
}
|
|
|
|
/**
|
|
* Execute a module chunk in a new isolated environment
|
|
*/
|
|
public function executeModule( $chunk ) {
|
|
return $this->getInterpreter()->callFunction( $this->mw['executeModule'], $chunk );
|
|
}
|
|
|
|
/**
|
|
* Execute a module function chunk
|
|
*/
|
|
public function executeFunctionChunk( $chunk, $frame ) {
|
|
$oldFrame = $this->currentFrame;
|
|
$this->currentFrame = $frame;
|
|
$result = $this->getInterpreter()->callFunction(
|
|
$this->mw['executeFunction'],
|
|
$chunk );
|
|
$this->currentFrame = $oldFrame;
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Load a library from the given file and execute it in the base environment.
|
|
* Return the export list, or null if there isn't one.
|
|
*/
|
|
protected function loadLibraryFromFile( $fileName ) {
|
|
$code = file_get_contents( $fileName );
|
|
if ( $code === false ) {
|
|
throw new MWException( 'Lua file does not exist: ' . $fileName );
|
|
}
|
|
# Prepending an "@" to the chunk name makes Lua think it is a filename
|
|
$module = $this->getInterpreter()->loadString( $code, '@' . basename( $fileName ) );
|
|
$ret = $this->getInterpreter()->callFunction( $module );
|
|
return isset( $ret[0] ) ? $ret[0] : null;
|
|
}
|
|
|
|
public function getGeSHiLanguage() {
|
|
return 'lua';
|
|
}
|
|
|
|
public function getCodeEditorLanguage() {
|
|
return 'lua';
|
|
}
|
|
|
|
public function runConsole( $params ) {
|
|
/**
|
|
* TODO: provide some means for giving correct line numbers for errors
|
|
* in console input, and for producing an informative error message
|
|
* if there is an error in prevQuestions.
|
|
*
|
|
* Maybe each console line could be evaluated as a different chunk,
|
|
* apparently that's what lua.c does.
|
|
*/
|
|
$code = "return function (__init)\n" .
|
|
"local p = mw.executeModule(__init)\n" .
|
|
"local print = mw.log\n";
|
|
foreach ( $params['prevQuestions'] as $q ) {
|
|
if ( substr( $q, 0, 1 ) === '=' ) {
|
|
$code .= "print(" . substr( $q, 1 ) . ")";
|
|
} else {
|
|
$code .= $q;
|
|
}
|
|
$code .= "\n";
|
|
}
|
|
$code .= "mw.clearLogBuffer()\n";
|
|
if ( substr( $params['question'], 0, 1 ) === '=' ) {
|
|
// Treat a statement starting with "=" as a return statement, like in lua.c
|
|
$code .= "return mw.allToString(" . substr( $params['question'], 1 ) . "), mw.getLogBuffer()\n";
|
|
} else {
|
|
$code .= $params['question'] . "\n" .
|
|
"return nil, mw.getLogBuffer()\n";
|
|
}
|
|
$code .= "end\n";
|
|
|
|
$contentModule = $this->newModule(
|
|
$params['content'], $params['title']->getPrefixedDBkey() );
|
|
$contentInit = $contentModule->getInitChunk();
|
|
|
|
$consoleModule = $this->newModule(
|
|
$code,
|
|
wfMessage( 'scribunto-console-current-src' )->text()
|
|
);
|
|
$consoleInit = $consoleModule->getInitChunk();
|
|
$ret = $this->getInterpreter()->callFunction( $consoleInit );
|
|
$func = $ret[0];
|
|
$ret = $this->getInterpreter()->callFunction( $func, $contentInit );
|
|
return array(
|
|
'return' => isset( $ret[0] ) ? $ret[0] : null,
|
|
'print' => isset( $ret[1] ) ? $ret[1] : '',
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Workalike for luaL_checktype()
|
|
*
|
|
* @param $funcName The Lua function name, for use in error messages
|
|
* @param $args The argument array
|
|
* @param $index0 The zero-based argument index
|
|
* @param $type The type name as given by gettype()
|
|
* @param $msgType The type name used in the error message
|
|
*/
|
|
public function checkType( $funcName, $args, $index0, $type, $msgType ) {
|
|
if ( !isset( $args[$index0] ) || gettype( $args[$index0] ) !== $type ) {
|
|
$index1 = $index0 + 1;
|
|
throw new Scribunto_LuaError( "bad argument #$index1 to '$funcName' ($msgType expected)" );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Workalike for luaL_checkstring()
|
|
*
|
|
* @param $funcName The Lua function name, for use in error messages
|
|
* @param $args The argument array
|
|
* @param $index0 The zero-based argument index
|
|
*/
|
|
public function checkString( $funcName, $args, $index0 ) {
|
|
$this->checkType( $funcName, $args, $index0, 'string', 'string' );
|
|
}
|
|
|
|
/**
|
|
* Workalike for luaL_checknumber()
|
|
*
|
|
* @param $funcName The Lua function name, for use in error messages
|
|
* @param $args The argument array
|
|
* @param $index0 The zero-based argument index
|
|
*/
|
|
public function checkNumber( $funcName, $args, $index0 ) {
|
|
$this->checkType( $funcName, $args, $index0, 'double', 'number' );
|
|
}
|
|
|
|
/**
|
|
* Handler for the mw_php.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.
|
|
*/
|
|
function loadPackage( $name ) {
|
|
$args = func_get_args();
|
|
$this->checkString( 'loadPackage', $args, 0 );
|
|
|
|
foreach ( $this->libraryPaths as $path ) {
|
|
$fileName = $this->getLuaLibDir() . "/$path/$name.lua";
|
|
if ( !file_exists( $fileName ) ) {
|
|
continue;
|
|
}
|
|
$code = file_get_contents( $fileName );
|
|
$init = $this->interpreter->loadString( $code, "@$name.lua" );
|
|
return array( $init );
|
|
}
|
|
|
|
$title = Title::newFromText( $name );
|
|
if ( !$title || $title->getNamespace() != NS_MODULE ) {
|
|
return array();
|
|
}
|
|
|
|
$module = $this->fetchModuleFromParser( $title );
|
|
if ( $module ) {
|
|
return array( $module->getInitChunk() );
|
|
} else {
|
|
return array();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Helper function for the implementation of frame methods
|
|
*/
|
|
protected function getFrameById( $frameId ) {
|
|
if ( !$this->currentFrame ) {
|
|
return false;
|
|
}
|
|
if ( $frameId === 'parent' ) {
|
|
if ( !isset( $this->currentFrame->parent ) ) {
|
|
return false;
|
|
} else {
|
|
return $this->currentFrame->parent;
|
|
}
|
|
} elseif ( $frameId === 'current' ) {
|
|
return $this->currentFrame;
|
|
} else {
|
|
throw new Scribunto_LuaError( 'invalid frame ID' );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handler for mw_php.parentFrameExists()
|
|
*/
|
|
function parentFrameExists() {
|
|
$frame = $this->getFrameById( 'parent' );
|
|
return array( $frame !== false );
|
|
}
|
|
|
|
/**
|
|
* Handler for mw_php.getExpandedArgument()
|
|
*/
|
|
function getExpandedArgument( $frameId, $name ) {
|
|
$args = func_get_args();
|
|
$this->checkString( 'getExpandedArgument', $args, 0 );
|
|
|
|
$frame = $this->getFrameById( $frameId );
|
|
if ( $frame === false ) {
|
|
return array();
|
|
}
|
|
$result = $frame->getArgument( $name );
|
|
if ( $result === false ) {
|
|
return array();
|
|
} else {
|
|
return array( $result );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Handler for mw_php.getAllExpandedArguments()
|
|
*/
|
|
function getAllExpandedArguments( $frameId ) {
|
|
$frame = $this->getFrameById( $frameId );
|
|
if ( $frame === false ) {
|
|
return array();
|
|
}
|
|
return array( $frame->getArguments() );
|
|
}
|
|
|
|
/**
|
|
* Handler for mw_php.expandTemplate
|
|
*/
|
|
function expandTemplate( $frameId, $titleText, $args ) {
|
|
$frame = $this->getFrameById( $frameId );
|
|
if ( $frame === false ) {
|
|
throw new Scribunto_LuaError( 'attempt to call mw.expandTemplate with no frame' );
|
|
}
|
|
|
|
$title = Title::newFromText( $titleText, NS_TEMPLATE );
|
|
if ( !$title ) {
|
|
throw new Scribunto_LuaError( 'expandTemplate: invalid title' );
|
|
}
|
|
|
|
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' );
|
|
}
|
|
|
|
$newFrame = $this->parser->getPreprocessor()->newCustomFrame( $args );
|
|
$text = $this->doCachedExpansion( $newFrame, $dom,
|
|
array(
|
|
'template' => $finalTitle->getPrefixedDBkey(),
|
|
'args' => $args
|
|
) );
|
|
return array( $text );
|
|
}
|
|
|
|
/**
|
|
* Handler for mw_php.preprocess()
|
|
*/
|
|
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' );
|
|
}
|
|
$text = $this->doCachedExpansion( $frame, $text,
|
|
array(
|
|
'inputText' => $text,
|
|
'args' => $frame->getArguments()
|
|
) );
|
|
return array( $text );
|
|
}
|
|
|
|
function doCachedExpansion( $frame, $input, $cacheKey ) {
|
|
$hash = md5( serialize( $cacheKey ) );
|
|
if ( !isset( $this->expandCache[$hash] ) ) {
|
|
if ( is_scalar( $input ) ) {
|
|
$dom = $this->parser->getPreprocessor()->preprocessToObj(
|
|
$input, Parser::PTD_FOR_INCLUSION );
|
|
} else {
|
|
$dom = $input;
|
|
}
|
|
if ( count( $this->expandCache ) > self::MAX_EXPAND_CACHE_SIZE ) {
|
|
reset( $this->expandCache );
|
|
$oldHash = key( $this->expandCache );
|
|
unset( $this->expandCache[$oldHash] );
|
|
}
|
|
$this->expandCache[$hash] = $frame->expand( $dom );
|
|
}
|
|
return $this->expandCache[$hash];
|
|
}
|
|
}
|
|
|
|
class Scribunto_LuaModule extends ScribuntoModuleBase {
|
|
protected $initChunk;
|
|
|
|
/**
|
|
* @param $name string
|
|
* @return Scribunto_LuaFunction
|
|
*/
|
|
protected function newFunction( $name ) {
|
|
return new Scribunto_LuaFunction( $this, $name, $contents ); // FIXME: $contents is undefined
|
|
}
|
|
|
|
public function validate() {
|
|
try {
|
|
$this->getInitChunk();
|
|
} catch ( ScribuntoException $e ) {
|
|
return $e->toStatus();
|
|
}
|
|
return Status::newGood();
|
|
}
|
|
|
|
/**
|
|
* Execute the module function and return the export table.
|
|
*/
|
|
public function execute() {
|
|
$init = $this->getInitChunk();
|
|
$ret = $this->engine->executeModule( $init );
|
|
if( !$ret ) {
|
|
throw $this->engine->newException( 'scribunto-lua-noreturn' );
|
|
}
|
|
if( !is_array( $ret[0] ) ) {
|
|
throw $this->engine->newException( 'scribunto-lua-notarrayreturn' );
|
|
}
|
|
return $ret[0];
|
|
}
|
|
|
|
/**
|
|
* Get the chunk which, when called, will return the export table.
|
|
*/
|
|
public function getInitChunk() {
|
|
if ( !$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.
|
|
*/
|
|
public function invoke( $name, $frame ) {
|
|
$exports = $this->execute();
|
|
if ( !isset( $exports[$name] ) ) {
|
|
throw $this->engine->newException( 'scribunto-common-nosuchfunction' );
|
|
}
|
|
|
|
$result = $this->engine->executeFunctionChunk( $exports[$name], $frame );
|
|
if ( isset( $result[0] ) ) {
|
|
return $result[0];
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
}
|
|
|
|
class Scribunto_LuaError extends ScribuntoException {
|
|
var $luaMessage, $lineMap = array();
|
|
|
|
function __construct( $message, $options = array() ) {
|
|
$this->luaMessage = $message;
|
|
$options = $options + array( 'args' => array( $message ) );
|
|
if ( isset( $options['module'] ) && isset( $options['line'] ) ) {
|
|
$msg = 'scribunto-lua-error-location';
|
|
} else {
|
|
$msg = 'scribunto-lua-error';
|
|
}
|
|
|
|
parent::__construct( $msg, $options );
|
|
}
|
|
|
|
function getLuaMessage() {
|
|
return $this->luaMessage;
|
|
}
|
|
|
|
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
|
|
*/
|
|
function getScriptTraceHtml( $options = array() ) {
|
|
if ( !isset( $this->params['trace'] ) ) {
|
|
return false;
|
|
}
|
|
if ( isset( $options['msgOptions'] ) ){
|
|
$msgOptions = $options['msgOptions'];
|
|
} else {
|
|
$msgOptions = array();
|
|
}
|
|
|
|
$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->getNamespace() === NS_MODULE ) {
|
|
$title->setFragment( '#mw-ce-l' . $currentline );
|
|
$src = Html::rawElement( 'a',
|
|
array( 'href' => $title->getFullURL( 'action=edit' ) ),
|
|
$src );
|
|
}
|
|
}
|
|
|
|
if ( strval( $info['namewhat'] ) !== '' ) {
|
|
$function = wfMessage( 'scribunto-lua-in-function', $info['name'] );
|
|
in_array( 'content', $msgOptions ) ?
|
|
$function = $function->inContentLanguage()->text() :
|
|
$function = $function->text();
|
|
} elseif ( $info['what'] == 'main' ) {
|
|
$function = wfMessage( 'scribunto-lua-in-main' );
|
|
in_array( 'content', $msgOptions ) ?
|
|
$function = $function->inContentLanguage()->text() :
|
|
$function = $function->text();
|
|
} elseif ( $info['what'] == 'C' || $info['what'] == 'tail' ) {
|
|
$function = '?';
|
|
}
|
|
|
|
$backtraceLine = wfMessage( 'scribunto-lua-backtrace-line', "<strong>$src</strong>", $function );
|
|
in_array( 'content', $msgOptions ) ?
|
|
$backtraceLine = $backtraceLine->inContentLanguage()->text() :
|
|
$backtraceLine = $backtraceLine->text();
|
|
|
|
$s .= "<li>\n\t" . $backtraceLine . "\n</li>\n";
|
|
}
|
|
$s .= '</ol>';
|
|
return $s;
|
|
}
|
|
}
|