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();

# Start the autoloader, so that extensions can derive classes from core files
require_once "$IP/includes/AutoLoader.php";
# Stub the profiler
require_once "$IP/includes/profiler/Profiler.php";

# Start the profiler
$wgProfiler = array();
if ( file_exists( "$IP/StartProfiler.php" ) ) {
    require "$IP/StartProfiler.php";
}

// Some other requires
require_once "$IP/includes/Defines.php";
require_once "$IP/includes/DefaultSettings.php";

# Load composer's autoloader if present
if ( is_readable( "$IP/vendor/autoload.php" ) ) {
    require_once "$IP/vendor/autoload.php";
}

if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
    # Use a callback function to configure MediaWiki
    call_user_func( 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;
        $cluster = 'pmtpa';
        require "$IP/../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 "$IP/AdminSettings.php";
}

if ( $maintenance->getDbType() === Maintenance::DB_NONE ) {
    if ( $wgLocalisationCacheConf['storeClass'] === false && ( $wgLocalisationCacheConf['store'] == 'db' || ( $wgLocalisationCacheConf['store'] == 'detect' && !$wgCacheDirectory ) ) ) {
        $wgLocalisationCacheConf['storeClass'] = 'LCStore_Null';
    }
}
$maintenance->finalSetup();
// Some last includes
require_once "$IP/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();

    // Perform deferred updates.
    DeferredUpdates::doUpdates( 'commit' );

    // log profiling info
    wfLogProfilingData();

    // Commit and close up!
    $factory = wfGetLBFactory();
    $factory->commitMasterChanges();
    $factory->shutdown();
} catch ( MWException $mwe ) {
    echo $mwe->getText();
    exit( 1 );
}