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<?php
/**
* Take page text out of an XML dump file and render basic HTML out to files.
* This is *NOT* suitable for publishing or offline use; it's intended for
* running comparative tests of parsing behavior using real-world data.
*
* Templates etc are pulled from the local wiki database, not from the dump.
*
* Copyright © 2011 Platonides
* https://www.mediawiki.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Maintenance
*/
require_once __DIR__ . '/dumpIterator.php';
/**
* Maintenance script to take page text out of an XML dump file and render
* basic HTML out to files.
*
* @ingroup Maintenance
*/
class CompareParsers extends DumpIterator {
private $count = 0;
public function __construct() {
parent::__construct();
$this->saveFailed = false;
$this->addDescription( 'Run a file or dump with several parsers' );
$this->addOption( 'parser1', 'The first parser to compare.', true, true );
$this->addOption( 'parser2', 'The second parser to compare.', true, true );
$this->addOption( 'tidy', 'Run tidy on the articles.', false, false );
$this->addOption(
'save-failed',
'Folder in which articles which differ will be stored.',
false,
true
);
$this->addOption( 'show-diff', 'Show a diff of the two renderings.', false, false );
$this->addOption(
'diff-bin',
'Binary to use for diffing (can also be provided by DIFF env var).',
false,
false
);
$this->addOption(
'strip-parameters',
'Remove parameters of html tags to increase readability.',
false,
false
);
$this->addOption(
'show-parsed-output',
'Show the parsed html if both Parsers give the same output.',
false,
false
);
}
public function checkOptions() {
if ( $this->hasOption( 'save-failed' ) ) {
$this->saveFailed = $this->getOption( 'save-failed' );
}
$this->stripParametersEnabled = $this->hasOption( 'strip-parameters' );
$this->showParsedOutput = $this->hasOption( 'show-parsed-output' );
$this->showDiff = $this->hasOption( 'show-diff' );
if ( $this->showDiff ) {
$bin = $this->getOption( 'diff-bin', getenv( 'DIFF' ) );
if ( $bin != '' ) {
global $wgDiff;
$wgDiff = $bin;
}
}
$user = new User();
$this->options = ParserOptions::newFromUser( $user );
if ( $this->hasOption( 'tidy' ) ) {
global $wgUseTidy;
if ( !$wgUseTidy ) {
$this->error( 'Tidy was requested but $wgUseTidy is not set in LocalSettings.php', true );
}
$this->options->setTidy( true );
}
$this->failed = 0;
}
public function conclusions() {
$this->error( "{$this->failed} failed revisions out of {$this->count}" );
if ( $this->count > 0 ) {
$this->output( " (" . ( $this->failed / $this->count ) . "%)\n" );
}
}
function stripParameters( $text ) {
if ( !$this->stripParametersEnabled ) {
return $text;
}
return preg_replace( '/(<a) [^>]+>/', '$1>', $text );
}
/**
* Callback function for each revision, parse with both parsers and compare
* @param Revision $rev
*/
public function processRevision( $rev ) {
$title = $rev->getTitle();
$parser1Name = $this->getOption( 'parser1' );
$parser2Name = $this->getOption( 'parser2' );
self::checkParserLocally( $parser1Name );
self::checkParserLocally( $parser2Name );
$parser1 = new $parser1Name();
$parser2 = new $parser2Name();
$content = $rev->getContent();
if ( $content->getModel() !== CONTENT_MODEL_WIKITEXT ) {
$this->error( "Page {$title->getPrefixedText()} does not contain wikitext "
. "but {$content->getModel()}\n" );
return;
}
$text = strval( $content->getNativeData() );
$output1 = $parser1->parse( $text, $title, $this->options );
$output2 = $parser2->parse( $text, $title, $this->options );
if ( $output1->getText() != $output2->getText() ) {
$this->failed++;
$this->error( "Parsing for {$title->getPrefixedText()} differs\n" );
if ( $this->saveFailed ) {
file_put_contents(
$this->saveFailed . '/' . rawurlencode( $title->getPrefixedText() ) . ".txt",
$text
);
}
if ( $this->showDiff ) {
$this->output( wfDiff(
$this->stripParameters( $output1->getText() ),
$this->stripParameters( $output2->getText() ),
''
) );
}
} else {
$this->output( $title->getPrefixedText() . "\tOK\n" );
if ( $this->showParsedOutput ) {
$this->output( $this->stripParameters( $output1->getText() ) );
}
}
}
private static function checkParserLocally( $parserName ) {
/* Look for the parser in a file appropiately named in the current folder */
if ( !class_exists( $parserName ) && file_exists( "$parserName.php" ) ) {
global $wgAutoloadClasses;
$wgAutoloadClasses[$parserName] = realpath( '.' ) . "/$parserName.php";
}
}
}
$maintClass = "CompareParsers";
require_once RUN_MAINTENANCE_IF_MAIN;