doMaintenance.php

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<?php
if ( !defined( 'RUN_MAINTENANCE_IF_MAIN' ) ) {
        echo "This file must be included after Maintenance.php\n";
        exit( 1 );
}

// Wasn't included from the file scope, halt execution (probably wanted the class)
// If a class is using commandLine.inc (old school maintenance), they definitely
// cannot be included and will proceed with execution
if( !Maintenance::shouldExecute() && $maintClass != 'CommandLineInc' ) {
        return;
}

if ( !$maintClass || !class_exists( $maintClass ) ) {
        echo "\$maintClass is not set or is set to a non-existent class.\n";
        exit( 1 );
}

// Get an object to start us off
$maintenance = new $maintClass();

// Basic sanity checks and such
$maintenance->setup();

// We used to call this variable $self, but it was moved
// to $maintenance->mSelf. Keep that here for b/c
$self = $maintenance->getName();

// Detect compiled mode
if ( isset( $_SERVER['MW_COMPILED'] ) ) {
        define( 'MW_COMPILED', 1 );
} else {
        # Get the MWInit class
        require_once( "$IP/includes/Init.php" );
        require_once( "$IP/includes/AutoLoader.php" );
}

# Stub the profiler
require_once( MWInit::compiledPath( 'includes/profiler/Profiler.php' ) );

// Some other requires
if ( !defined( 'MW_COMPILED' ) ) {
        require_once( "$IP/includes/Defines.php" );
}
require_once( MWInit::compiledPath( 'includes/DefaultSettings.php' ) );

if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
        # Use a callback function to configure MediaWiki
        MWFunction::call( MW_CONFIG_CALLBACK );
} else {
        if ( file_exists( "$IP/../wmf-config/wikimedia-mode" ) ) {
                // Load settings, using wikimedia-mode if needed
                // @todo FIXME: Replace this hack with general farm-friendly code
                # @todo FIXME: Wikimedia-specific stuff needs to go away to an ext
                # Maybe a hook?
                global $cluster;
                $cluster = 'pmtpa';
                require( MWInit::interpretedPath( '../wmf-config/wgConf.php' ) );
        }
        // Require the configuration (probably LocalSettings.php)
        require( $maintenance->loadSettings() );
}

if ( $maintenance->getDbType() === Maintenance::DB_ADMIN &&
        is_readable( "$IP/AdminSettings.php" ) )
{
        require( MWInit::interpretedPath( 'AdminSettings.php' ) );
}
$maintenance->finalSetup();
// Some last includes
require_once( MWInit::compiledPath( 'includes/Setup.php' ) );

// Much much faster startup than creating a title object
$wgTitle = null;

// Do the work
try {
        $maintenance->execute();

        // Potentially debug globals
        $maintenance->globals();
} catch ( MWException $mwe ) {
        echo( $mwe->getText() );
        exit( 1 );
}