update.php

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#!/usr/bin/env php
<?php
require_once __DIR__ . '/Maintenance.php';

use Wikimedia\Rdbms\IMaintainableDatabase;
use Wikimedia\Rdbms\DatabaseSqlite;

class UpdateMediaWiki extends Maintenance {
    function __construct() {
        parent::__construct();
        $this->addDescription( 'MediaWiki database updater' );
        $this->addOption( 'skip-compat-checks', 'Skips compatibility checks, mostly for developers' );
        $this->addOption( 'quick', 'Skip 5 second countdown before starting' );
        $this->addOption( 'doshared', 'Also update shared tables' );
        $this->addOption( 'nopurge', 'Do not purge the objectcache table after updates' );
        $this->addOption( 'noschema', 'Only do the updates that are not done during schema updates' );
        $this->addOption(
            'schema',
            'Output SQL to do the schema updates instead of doing them. Works '
                . 'even when $wgAllowSchemaUpdates is false',
            false,
            true
        );
        $this->addOption( 'force', 'Override when $wgAllowSchemaUpdates disables this script' );
        $this->addOption(
            'skip-external-dependencies',
            'Skips checking whether external dependencies are up to date, mostly for developers'
        );
    }

    function getDbType() {
        return Maintenance::DB_ADMIN;
    }

    function compatChecks() {
        $minimumPcreVersion = Installer::MINIMUM_PCRE_VERSION;

        $pcreVersion = explode( ' ', PCRE_VERSION, 2 )[0];
        if ( version_compare( $pcreVersion, $minimumPcreVersion, '<' ) ) {
            $this->fatalError(
                "PCRE $minimumPcreVersion or later is required.\n" .
                "Your PHP binary is linked with PCRE $pcreVersion.\n\n" .
                "More information:\n" .
                "https://www.mediawiki.org/wiki/Manual:Errors_and_symptoms/PCRE\n\n" .
                "ABORTING.\n" );
        }

        $test = new PhpXmlBugTester();
        if ( !$test->ok ) {
            $this->fatalError(
                "Your system has a combination of PHP and libxml2 versions that is buggy\n" .
                "and can cause hidden data corruption in MediaWiki and other web apps.\n" .
                "Upgrade to libxml2 2.7.3 or later.\n" .
                "ABORTING (see https://bugs.php.net/bug.php?id=45996).\n" );
        }
    }

    function execute() {
        global $wgVersion, $wgLang, $wgAllowSchemaUpdates, $wgMessagesDirs;

        if ( !$wgAllowSchemaUpdates
            && !( $this->hasOption( 'force' )
                || $this->hasOption( 'schema' )
                || $this->hasOption( 'noschema' ) )
        ) {
            $this->fatalError( "Do not run update.php on this wiki. If you're seeing this you should\n"
                . "probably ask for some help in performing your schema updates or use\n"
                . "the --noschema and --schema options to get an SQL file for someone\n"
                . "else to inspect and run.\n\n"
                . "If you know what you are doing, you can continue with --force\n" );
        }

        $this->fileHandle = null;
        if ( substr( $this->getOption( 'schema' ), 0, 2 ) === "--" ) {
            $this->fatalError( "The --schema option requires a file as an argument.\n" );
        } elseif ( $this->hasOption( 'schema' ) ) {
            $file = $this->getOption( 'schema' );
            $this->fileHandle = fopen( $file, "w" );
            if ( $this->fileHandle === false ) {
                $err = error_get_last();
                $this->fatalError( "Problem opening the schema file for writing: $file\n\t{$err['message']}" );
            }
        }

        // T206765: We need to load the installer i18n files as some of errors come installer/updater code
        $wgMessagesDirs['MediawikiInstaller'] = dirname( __DIR__ ) . '/includes/installer/i18n';

        $lang = Language::factory( 'en' );
        // Set global language to ensure localised errors are in English (T22633)
        RequestContext::getMain()->setLanguage( $lang );
        $wgLang = $lang; // BackCompat

        define( 'MW_UPDATER', true );

        $this->output( "MediaWiki {$wgVersion} Updater\n\n" );

        foreach ( SpecialVersion::getSoftwareInformation() as $name => $version ) {
            $this->output( "{$name}: {$version}\n" );
        }

        wfWaitForSlaves();

        if ( !$this->hasOption( 'skip-compat-checks' ) ) {
            $this->compatChecks();
        } else {
            $this->output( "Skipping compatibility checks, proceed at your own risk (Ctrl+C to abort)\n" );
            $this->countDown( 5 );
        }

        // Check external dependencies are up to date
        if ( !$this->hasOption( 'skip-external-dependencies' ) ) {
            $composerLockUpToDate = $this->runChild( CheckComposerLockUpToDate::class );
            $composerLockUpToDate->execute();
        } else {
            $this->output(
                "Skipping checking whether external dependencies are up to date, proceed at your own risk\n"
            );
        }

        # Attempt to connect to the database as a privileged user
        # This will vomit up an error if there are permissions problems
        $db = $this->getDB( DB_MASTER );

        # Check to see whether the database server meets the minimum requirements

        $dbInstallerClass = Installer::getDBInstallerClass( $db->getType() );
        $status = $dbInstallerClass::meetsMinimumRequirement( $db->getServerVersion() );
        if ( !$status->isOK() ) {
            // This might output some wikitext like <strong> but it should be comprehensible
            $text = $status->getWikiText();
            $this->fatalError( $text );
        }

        $dbDomain = WikiMap::getCurrentWikiDbDomain()->getId();
        $this->output( "Going to run database updates for $dbDomain\n" );
        if ( $db->getType() === 'sqlite' ) {
            $this->output( "Using SQLite file: '{$db->getDbFilePath()}'\n" );
        }
        $this->output( "Depending on the size of your database this may take a while!\n" );

        if ( !$this->hasOption( 'quick' ) ) {
            $this->output( "Abort with control-c in the next five seconds "
                . "(skip this countdown with --quick) ... " );
            $this->countDown( 5 );
        }

        $time1 = microtime( true );

        $badPhpUnit = dirname( __DIR__ ) . '/vendor/phpunit/phpunit/src/Util/PHP/eval-stdin.php';
        if ( file_exists( $badPhpUnit ) ) {
            // Bad versions of the file are:
            // https://raw.githubusercontent.com/sebastianbergmann/phpunit/c820f915bfae34e5a836f94967a2a5ea5ef34f21/src/Util/PHP/eval-stdin.php
            // https://raw.githubusercontent.com/sebastianbergmann/phpunit/3aaddb1c5bd9b9b8d070b4cf120e71c36fd08412/src/Util/PHP/eval-stdin.php
            $md5 = md5_file( $badPhpUnit );
            if ( $md5 === '120ac49800671dc383b6f3709c25c099'
                || $md5 === '28af792cb38fc9a1b236b91c1aad2876'
            ) {
                $success = unlink( $badPhpUnit );
                if ( $success ) {
                    $this->output( "Removed PHPUnit eval-stdin.php to protect against CVE-2017-9841\n" );
                } else {
                    $this->error( "Unable to remove $badPhpUnit, you should manually. See CVE-2017-9841" );
                }
            }
        }

        $shared = $this->hasOption( 'doshared' );

        $updates = [ 'core', 'extensions' ];
        if ( !$this->hasOption( 'schema' ) ) {
            if ( $this->hasOption( 'noschema' ) ) {
                $updates[] = 'noschema';
            }
            $updates[] = 'stats';
        }

        $updater = DatabaseUpdater::newForDB( $db, $shared, $this );
        $updater->doUpdates( $updates );

        foreach ( $updater->getPostDatabaseUpdateMaintenance() as $maint ) {
            $child = $this->runChild( $maint );

            // LoggedUpdateMaintenance is checking the updatelog itself
            $isLoggedUpdate = $child instanceof LoggedUpdateMaintenance;

            if ( !$isLoggedUpdate && $updater->updateRowExists( $maint ) ) {
                continue;
            }

            $child->execute();
            if ( !$isLoggedUpdate ) {
                $updater->insertUpdateRow( $maint );
            }
        }

        $updater->setFileAccess();
        if ( !$this->hasOption( 'nopurge' ) ) {
            $updater->purgeCache();
        }

        $time2 = microtime( true );

        $timeDiff = $lang->formatTimePeriod( $time2 - $time1 );
        $this->output( "\nDone in $timeDiff.\n" );
    }

    function afterFinalSetup() {
        global $wgLocalisationCacheConf;

        # Don't try to access the database
        # This needs to be disabled early since extensions will try to use the l10n
        # cache from $wgExtensionFunctions (T22471)
        $wgLocalisationCacheConf = [
            'class' => LocalisationCache::class,
            'storeClass' => LCStoreNull::class,
            'storeDirectory' => false,
            'manualRecache' => false,
        ];
    }

    public function validateParamsAndArgs() {
        // Allow extensions to add additional params.
        $params = [];
        Hooks::run( 'MaintenanceUpdateAddParams', [ &$params ] );

        // This executes before the PHP version check, so don't use null coalesce (??).
        // Keeping this compatible with older PHP versions lets us reach the code that
        // displays a more helpful error.
        foreach ( $params as $name => $param ) {
            $this->addOption(
                $name,
                $param['desc'],
                isset( $param['require'] ) ? $param['require'] : false,
                isset( $param['withArg'] ) ? $param['withArg'] : false,
                isset( $param['shortName'] ) ? $param['shortName'] : false,
                isset( $param['multiOccurrence'] ) ? $param['multiOccurrence'] : false
            );
        }

        parent::validateParamsAndArgs();
    }
}

$maintClass = UpdateMediaWiki::class;
require_once RUN_MAINTENANCE_IF_MAIN;