maintenance/Maintenance.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup Maintenance
   5  * @defgroup Maintenance Maintenance
   6  */
   7
   8 // Define this so scripts can easily find doMaintenance.php
   9 define( 'DO_MAINTENANCE', dirname( __FILE__ ) . '/doMaintenance.php' );
  10 $maintClass = false;
  11
  12 function wfRunMaintenance( $class ) {
  13         $maintClass = $class;
  14         require_once( DO_MAINTENANCE );
  15 }
  16
  17 // Make sure we're on PHP5 or better
  18 if ( version_compare( PHP_VERSION, '5.1.0' ) < 0 ) {
  19         die ( "Sorry! This version of MediaWiki requires PHP 5.1.x; you are running " .
  20                 PHP_VERSION . ".\n\n" .
  21                 "If you are sure you already have PHP 5.1.x or higher installed, it may be\n" .
  22                 "installed in a different path from PHP " . PHP_VERSION . ". Check with your system\n" .
  23                 "administrator.\n" );
  24 }
  25
  26 /**
  27  * Abstract maintenance class for quickly writing and churning out
  28  * maintenance scripts with minimal effort. All that _must_ be defined
  29  * is the execute() method. See docs/maintenance.txt for more info
  30  * and a quick demo of how to use it.
  31  *
  32  * This program is free software; you can redistribute it and/or modify
  33  * it under the terms of the GNU General Public License as published by
  34  * the Free Software Foundation; either version 2 of the License, or
  35  * (at your option) any later version.
  36  *
  37  * This program is distributed in the hope that it will be useful,
  38  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  39  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  40  * GNU General Public License for more details.
  41  *
  42  * You should have received a copy of the GNU General Public License along
  43  * with this program; if not, write to the Free Software Foundation, Inc.,
  44  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  45  * http://www.gnu.org/copyleft/gpl.html
  46  *
  47  * @author Chad Horohoe <chad@anyonecanedit.org>
  48  * @since 1.16
  49  * @ingroup Maintenance
  50  */
  51 abstract class Maintenance {
  52
  53         /**
  54          * Constants for DB access type
  55          * @see Maintenance::getDbType()
  56          */
  57         const DB_NONE  = 0;
  58         const DB_STD   = 1;
  59         const DB_ADMIN = 2;
  60
  61         // Const for getStdin()
  62         const STDIN_ALL = 'all';
  63
  64         // This is the desired params
  65         protected $mParams = array();
  66
  67         // Array of desired args
  68         protected $mArgList = array();
  69
  70         // This is the list of options that were actually passed
  71         protected $mOptions = array();
  72
  73         // This is the list of arguments that were actually passed
  74         protected $mArgs = array();
  75
  76         // Name of the script currently running
  77         protected $mSelf;
  78
  79         // Special vars for params that are always used
  80         protected $mQuiet = false;
  81         protected $mDbUser, $mDbPass;
  82
  83         // A description of the script, children should change this
  84         protected $mDescription = '';
  85
  86         // Have we already loaded our user input?
  87         protected $mInputLoaded = false;
  88
  89         // Batch size. If a script supports this, they should set
  90         // a default with setBatchSize()
  91         protected $mBatchSize = null;
  92
  93         /**
  94          * List of all the core maintenance scripts. This is added
  95          * to scripts added by extensions in $wgMaintenanceScripts
  96          * and returned by getMaintenanceScripts()
  97          */
  98         protected static $mCoreScripts = null;
  99
 100         /**
 101          * Default constructor. Children should call this if implementing
 102          * their own constructors
 103          */
 104         public function __construct() {
 105                 $this->addDefaultParams();
 106                 register_shutdown_function( array( $this, 'outputChanneled' ), false );
 107         }
 108
 109         /**
 110          * Do the actual work. All child classes will need to implement this
 111          */
 112         abstract public function execute();
 113
 114         /**
 115          * Add a parameter to the script. Will be displayed on --help
 116          * with the associated description
 117          *
 118          * @param $name String: the name of the param (help, version, etc)
 119          * @param $description String: the description of the param to show on --help
 120          * @param $required Boolean: is the param required?
 121          * @param $withArg Boolean: is an argument required with this option?
 122          */
 123         protected function addOption( $name, $description, $required = false, $withArg = false ) {
 124                 $this->mParams[$name] = array( 'desc' => $description, 'require' => $required, 'withArg' => $withArg );
 125         }
 126
 127         /**
 128          * Checks to see if a particular param exists.
 129          * @param $name String: the name of the param
 130          * @return Boolean
 131          */
 132         protected function hasOption( $name ) {
 133                 return isset( $this->mOptions[$name] );
 134         }
 135
 136         /**
 137          * Get an option, or return the default
 138          * @param $name String: the name of the param
 139          * @param $default Mixed: anything you want, default null
 140          * @return Mixed
 141          */
 142         protected function getOption( $name, $default = null ) {
 143                 if ( $this->hasOption( $name ) ) {
 144                         return $this->mOptions[$name];
 145                 } else {
 146                         // Set it so we don't have to provide the default again
 147                         $this->mOptions[$name] = $default;
 148                         return $this->mOptions[$name];
 149                 }
 150         }
 151
 152         /**
 153          * Add some args that are needed
 154          * @param $arg String: name of the arg, like 'start'
 155          * @param $description String: short description of the arg
 156          * @param $required Boolean: is this required?
 157          */
 158         protected function addArg( $arg, $description, $required = true ) {
 159                 $this->mArgList[] = array(
 160                         'name' => $arg,
 161                         'desc' => $description,
 162                         'require' => $required
 163                 );
 164         }
 165
 166         /**
 167          * Remove an option.  Useful for removing options that won't be used in your script.
 168          * @param $name String: the option to remove.
 169          */
 170         protected function deleteOption( $name ) {
 171                 unset( $this->mParams[$name] );
 172         }
 173
 174         /**
 175          * Set the description text.
 176          * @param $text String: the text of the description
 177          */
 178         protected function addDescription( $text ) {
 179                 $this->mDescription = $text;
 180         }
 181
 182         /**
 183          * Does a given argument exist?
 184          * @param $argId Integer: the integer value (from zero) for the arg
 185          * @return Boolean
 186          */
 187         protected function hasArg( $argId = 0 ) {
 188                 return isset( $this->mArgs[$argId] );
 189         }
 190
 191         /**
 192          * Get an argument.
 193          * @param $argId Integer: the integer value (from zero) for the arg
 194          * @param $default Mixed: the default if it doesn't exist
 195          * @return mixed
 196          */
 197         protected function getArg( $argId = 0, $default = null ) {
 198                 return $this->hasArg( $argId ) ? $this->mArgs[$argId] : $default;
 199         }
 200
 201         /**
 202          * Set the batch size.
 203          * @param $s Integer: the number of operations to do in a batch
 204          */
 205         protected function setBatchSize( $s = 0 ) {
 206                 $this->mBatchSize = $s;
 207         }
 208
 209         /**
 210          * Get the script's name
 211          * @return String
 212          */
 213         public function getName() {
 214                 return $this->mSelf;
 215         }
 216
 217         /**
 218          * Return input from stdin.
 219          * @param $len Integer: the number of bytes to read. If null,
 220          *        just return the handle. Maintenance::STDIN_ALL returns
 221          *        the full length
 222          * @return Mixed
 223          */
 224         protected function getStdin( $len = null ) {
 225                 if ( $len == Maintenance::STDIN_ALL ) {
 226                         return file_get_contents( 'php://stdin' );
 227                 }
 228                 $f = fopen( 'php://stdin', 'rt' );
 229                 if ( !$len ) {
 230                         return $f;
 231                 }
 232                 $input = fgets( $f, $len );
 233                 fclose( $f );
 234                 return rtrim( $input );
 235         }
 236
 237         /**
 238          * Throw some output to the user. Scripts can call this with no fears,
 239          * as we handle all --quiet stuff here
 240          * @param $out String: the text to show to the user
 241          * @param $channel Mixed: unique identifier for the channel. See
 242          *     function outputChanneled.
 243          */
 244         protected function output( $out, $channel = null ) {
 245                 if ( $this->mQuiet ) {
 246                         return;
 247                 }
 248                 if ( $channel === null ) {
 249                         $this->cleanupChanneled();
 250
 251                         $f = fopen( 'php://stdout', 'w' );
 252                         fwrite( $f, $out );
 253                         fclose( $f );
 254                 }
 255                 else {
 256                         $out = preg_replace( '/\n\z/', '', $out );
 257                         $this->outputChanneled( $out, $channel );
 258                 }
 259         }
 260
 261         /**
 262          * Throw an error to the user. Doesn't respect --quiet, so don't use
 263          * this for non-error output
 264          * @param $err String: the error to display
 265          * @param $die Boolean: If true, go ahead and die out.
 266          */
 267         protected function error( $err, $die = false ) {
 268                 $this->outputChanneled( false );
 269                 if ( php_sapi_name() == 'cli' ) {
 270                         fwrite( STDERR, $err . "\n" );
 271                 } else {
 272                         $f = fopen( 'php://stderr', 'w' );
 273                         fwrite( $f, $err . "\n" );
 274                         fclose( $f );
 275                 }
 276                 if ( $die ) {
 277                         die();
 278                 }
 279         }
 280
 281         private $atLineStart = true;
 282         private $lastChannel = null;
 283
 284         /**
 285          * Clean up channeled output.  Output a newline if necessary.
 286          */
 287         public function cleanupChanneled() {
 288                 if ( !$this->atLineStart ) {
 289                         $handle = fopen( 'php://stdout', 'w' );
 290                         fwrite( $handle, "\n" );
 291                         fclose( $handle );
 292                         $this->atLineStart = true;
 293                 }
 294         }
 295
 296         /**
 297          * Message outputter with channeled message support. Messages on the
 298          * same channel are concatenated, but any intervening messages in another
 299          * channel start a new line.
 300          * @param $msg String: the message without trailing newline
 301          * @param $channel Channel identifier or null for no
 302          *     channel. Channel comparison uses ===.
 303          */
 304         public function outputChanneled( $msg, $channel = null ) {
 305                 if ( $msg === false ) {
 306                         $this->cleanupChanneled();
 307                         return;
 308                 }
 309
 310                 $handle = fopen( 'php://stdout', 'w' );
 311
 312                 // End the current line if necessary
 313                 if ( !$this->atLineStart && $channel !== $this->lastChannel ) {
 314                         fwrite( $handle, "\n" );
 315                 }
 316
 317                 fwrite( $handle, $msg );
 318
 319                 $this->atLineStart = false;
 320                 if ( $channel === null ) {
 321                         // For unchanneled messages, output trailing newline immediately
 322                         fwrite( $handle, "\n" );
 323                         $this->atLineStart = true;
 324                 }
 325                 $this->lastChannel = $channel;
 326
 327                 // Cleanup handle
 328                 fclose( $handle );
 329         }
 330
 331         /**
 332          * Does the script need different DB access? By default, we give Maintenance
 333          * scripts normal rights to the DB. Sometimes, a script needs admin rights
 334          * access for a reason and sometimes they want no access. Subclasses should
 335          * override and return one of the following values, as needed:
 336          *    Maintenance::DB_NONE  -  For no DB access at all
 337          *    Maintenance::DB_STD   -  For normal DB access, default
 338          *    Maintenance::DB_ADMIN -  For admin DB access
 339          * @return Integer
 340          */
 341         public function getDbType() {
 342                 return Maintenance::DB_STD;
 343         }
 344
 345         /**
 346          * Add the default parameters to the scripts
 347          */
 348         protected function addDefaultParams() {
 349                 $this->addOption( 'help', 'Display this help message' );
 350                 $this->addOption( 'quiet', 'Whether to supress non-error output' );
 351                 $this->addOption( 'conf', 'Location of LocalSettings.php, if not default', false, true );
 352                 $this->addOption( 'wiki', 'For specifying the wiki ID', false, true );
 353                 $this->addOption( 'globals', 'Output globals at the end of processing for debugging' );
 354                 $this->addOption( 'memory-limit', 'Set a specific memory limit for the script, -1 for no limit or "default" to avoid changing it' );
 355                 // If we support a DB, show the options
 356                 if ( $this->getDbType() > 0 ) {
 357                         $this->addOption( 'dbuser', 'The DB user to use for this script', false, true );
 358                         $this->addOption( 'dbpass', 'The password to use for this script', false, true );
 359                 }
 360                 // If we support $mBatchSize, show the option
 361                 if ( $this->mBatchSize ) {
 362                         $this->addOption( 'batch-size', 'Run this many operations ' .
 363                                 'per batch, default: ' . $this->mBatchSize, false, true );
 364                 }
 365         }
 366
 367         /**
 368          * Run a child maintenance script. Pass all of the current arguments
 369          * to it.
 370          * @param $maintClass String: a name of a child maintenance class
 371          * @param $classFile String: full path of where the child is
 372          * @return Maintenance child
 373          */
 374         protected function runChild( $maintClass, $classFile = null ) {
 375                 // If we haven't already specified, kill setup procedures
 376                 // for child scripts, we've already got a sane environment
 377                 self::disableSetup();
 378
 379                 // Make sure the class is loaded first
 380                 if ( !class_exists( $maintClass ) ) {
 381                         if ( $classFile ) {
 382                                 require_once( $classFile );
 383                         }
 384                         if ( !class_exists( $maintClass ) ) {
 385                                 $this->error( "Cannot spawn child: $maintClass" );
 386                         }
 387                 }
 388
 389                 $child = new $maintClass();
 390                 $child->loadParamsAndArgs( $this->mSelf, $this->mOptions, $this->mArgs );
 391                 return $child;
 392         }
 393
 394         /**
 395          * Disable Setup.php mostly
 396          */
 397         protected static function disableSetup() {
 398                 if ( !defined( 'MW_NO_SETUP' ) ) {
 399                         define( 'MW_NO_SETUP', true );
 400                 }
 401         }
 402
 403         /**
 404          * Do some sanity checking and basic setup
 405          */
 406         public function setup() {
 407                 global $IP, $wgCommandLineMode, $wgRequestTime;
 408
 409                 # Abort if called from a web server
 410                 if ( isset( $_SERVER ) && isset( $_SERVER['REQUEST_METHOD'] ) ) {
 411                         $this->error( 'This script must be run from the command line', true );
 412                 }
 413
 414                 # Make sure we can handle script parameters
 415                 if ( !ini_get( 'register_argc_argv' ) ) {
 416                         $this->error( 'Cannot get command line arguments, register_argc_argv is set to false', true );
 417                 }
 418
 419                 if ( version_compare( phpversion(), '5.2.4' ) >= 0 ) {
 420                         // Send PHP warnings and errors to stderr instead of stdout.
 421                         // This aids in diagnosing problems, while keeping messages
 422                         // out of redirected output.
 423                         if ( ini_get( 'display_errors' ) ) {
 424                                 ini_set( 'display_errors', 'stderr' );
 425                         }
 426
 427                         // Don't touch the setting on earlier versions of PHP,
 428                         // as setting it would disable output if you'd wanted it.
 429
 430                         // Note that exceptions are also sent to stderr when
 431                         // command-line mode is on, regardless of PHP version.
 432                 }
 433
 434                 $this->loadParamsAndArgs();
 435                 $this->maybeHelp();
 436
 437                 # Set the memory limit
 438                 # Note we need to set it again later in cache LocalSettings changed it
 439                 $this->adjustMemoryLimit();
 440
 441                 # Set max execution time to 0 (no limit). PHP.net says that
 442                 # "When running PHP from the command line the default setting is 0."
 443                 # But sometimes this doesn't seem to be the case.
 444                 ini_set( 'max_execution_time', 0 );
 445
 446                 $wgRequestTime = microtime( true );
 447
 448                 # Define us as being in MediaWiki
 449                 define( 'MEDIAWIKI', true );
 450
 451                 # Setup $IP, using MW_INSTALL_PATH if it exists
 452                 $IP = strval( getenv( 'MW_INSTALL_PATH' ) ) !== ''
 453                         ? getenv( 'MW_INSTALL_PATH' )
 454                         : realpath( dirname( __FILE__ ) . '/..' );
 455
 456                 $wgCommandLineMode = true;
 457                 # Turn off output buffering if it's on
 458                 @ob_end_flush();
 459
 460                 $this->validateParamsAndArgs();
 461         }
 462
 463         /**
 464          * Normally we disable the memory_limit when running admin scripts.
 465          * Some scripts may wish to actually set a limit, however, to avoid
 466          * blowing up unexpectedly. We also support a --memory-limit option,
 467          * to allow sysadmins to explicitly set one if they'd prefer to override
 468          * defaults (or for people using Suhosin which yells at you for trying
 469          * to disable the limits)
 470          */
 471         public function memoryLimit() {
 472                 return $this->getOption( 'memory-limit', -1 );
 473         }
 474
 475         /**
 476          * Adjusts PHP's memory limit to better suit our needs, if needed.
 477          */
 478         protected function adjustMemoryLimit() {
 479                 if ( $this->memoryLimit() != 'default' ) {
 480                         ini_set( 'memory_limit', $this->memoryLimit() );
 481                 }
 482         }
 483
 484         /**
 485          * Clear all params and arguments.
 486          */
 487         public function clearParamsAndArgs() {
 488                 $this->mOptions = array();
 489                 $this->mArgs = array();
 490                 $this->mInputLoaded = false;
 491         }
 492
 493         /**
 494          * Process command line arguments
 495          * $mOptions becomes an array with keys set to the option names
 496          * $mArgs becomes a zero-based array containing the non-option arguments
 497          *
 498          * @param $self String The name of the script, if any
 499          * @param $opts Array An array of options, in form of key=>value
 500          * @param $args Array An array of command line arguments
 501          */
 502         public function loadParamsAndArgs( $self = null, $opts = null, $args = null ) {
 503                 # If we were given opts or args, set those and return early
 504                 if ( $self ) {
 505                         $this->mSelf = $self;
 506                         $this->mInputLoaded = true;
 507                 }
 508                 if ( $opts ) {
 509                         $this->mOptions = $opts;
 510                         $this->mInputLoaded = true;
 511                 }
 512                 if ( $args ) {
 513                         $this->mArgs = $args;
 514                         $this->mInputLoaded = true;
 515                 }
 516
 517                 # If we've already loaded input (either by user values or from $argv)
 518                 # skip on loading it again. The array_shift() will corrupt values if
 519                 # it's run again and again
 520                 if ( $this->mInputLoaded ) {
 521                         $this->loadSpecialVars();
 522                         return;
 523                 }
 524
 525                 global $argv;
 526                 $this->mSelf = array_shift( $argv );
 527
 528                 $options = array();
 529                 $args = array();
 530
 531                 # Parse arguments
 532                 for ( $arg = reset( $argv ); $arg !== false; $arg = next( $argv ) ) {
 533                         if ( $arg == '--' ) {
 534                                 # End of options, remainder should be considered arguments
 535                                 $arg = next( $argv );
 536                                 while ( $arg !== false ) {
 537                                         $args[] = $arg;
 538                                         $arg = next( $argv );
 539                                 }
 540                                 break;
 541                         } elseif ( substr( $arg, 0, 2 ) == '--' ) {
 542                                 # Long options
 543                                 $option = substr( $arg, 2 );
 544                                 if ( isset( $this->mParams[$option] ) && $this->mParams[$option]['withArg'] ) {
 545                                         $param = next( $argv );
 546                                         if ( $param === false ) {
 547                                                 $this->error( "\nERROR: $option needs a value after it\n" );
 548                                                 $this->maybeHelp( true );
 549                                         }
 550                                         $options[$option] = $param;
 551                                 } else {
 552                                         $bits = explode( '=', $option, 2 );
 553                                         if ( count( $bits ) > 1 ) {
 554                                                 $option = $bits[0];
 555                                                 $param = $bits[1];
 556                                         } else {
 557                                                 $param = 1;
 558                                         }
 559                                         $options[$option] = $param;
 560                                 }
 561                         } elseif ( substr( $arg, 0, 1 ) == '-' ) {
 562                                 # Short options
 563                                 for ( $p = 1; $p < strlen( $arg ); $p++ ) {
 564                                         $option = $arg { $p } ;
 565                                         if ( isset( $this->mParams[$option]['withArg'] ) && $this->mParams[$option]['withArg'] ) {
 566                                                 $param = next( $argv );
 567                                                 if ( $param === false ) {
 568                                                         $this->error( "\nERROR: $option needs a value after it\n" );
 569                                                         $this->maybeHelp( true );
 570                                                 }
 571                                                 $options[$option] = $param;
 572                                         } else {
 573                                                 $options[$option] = 1;
 574                                         }
 575                                 }
 576                         } else {
 577                                 $args[] = $arg;
 578                         }
 579                 }
 580
 581                 $this->mOptions = $options;
 582                 $this->mArgs = $args;
 583                 $this->loadSpecialVars();
 584                 $this->mInputLoaded = true;
 585         }
 586
 587         /**
 588          * Run some validation checks on the params, etc
 589          */
 590         protected function validateParamsAndArgs() {
 591                 $die = false;
 592                 # Check to make sure we've got all the required options
 593                 foreach ( $this->mParams as $opt => $info ) {
 594                         if ( $info['require'] && !$this->hasOption( $opt ) ) {
 595                                 $this->error( "Param $opt required!" );
 596                                 $die = true;
 597                         }
 598                 }
 599                 # Check arg list too
 600                 foreach ( $this->mArgList as $k => $info ) {
 601                         if ( $info['require'] && !$this->hasArg( $k ) ) {
 602                                 $this->error( 'Argument <' . $info['name'] . '> required!' );
 603                                 $die = true;
 604                         }
 605                 }
 606
 607                 if ( $die ) {
 608                         $this->maybeHelp( true );
 609                 }
 610         }
 611
 612         /**
 613          * Handle the special variables that are global to all scripts
 614          */
 615         protected function loadSpecialVars() {
 616                 if ( $this->hasOption( 'dbuser' ) ) {
 617                         $this->mDbUser = $this->getOption( 'dbuser' );
 618                 }
 619                 if ( $this->hasOption( 'dbpass' ) ) {
 620                         $this->mDbPass = $this->getOption( 'dbpass' );
 621                 }
 622                 if ( $this->hasOption( 'quiet' ) ) {
 623                         $this->mQuiet = true;
 624                 }
 625                 if ( $this->hasOption( 'batch-size' ) ) {
 626                         $this->mBatchSize = $this->getOption( 'batch-size' );
 627                 }
 628         }
 629
 630         /**
 631          * Maybe show the help.
 632          * @param $force boolean Whether to force the help to show, default false
 633          */
 634         protected function maybeHelp( $force = false ) {
 635                 $screenWidth = 80; // TODO: Caculate this!
 636                 $tab = "    ";
 637                 $descWidth = $screenWidth - ( 2 * strlen( $tab ) );
 638
 639                 ksort( $this->mParams );
 640                 if ( $this->hasOption( 'help' ) || $force ) {
 641                         $this->mQuiet = false;
 642
 643                         if ( $this->mDescription ) {
 644                                 $this->output( "\n" . $this->mDescription . "\n" );
 645                         }
 646                         $output = "\nUsage: php " . basename( $this->mSelf );
 647                         if ( $this->mParams ) {
 648                                 $output .= " [--" . implode( array_keys( $this->mParams ), "|--" ) . "]";
 649                         }
 650                         if ( $this->mArgList ) {
 651                                 $output .= " <";
 652                                 foreach ( $this->mArgList as $k => $arg ) {
 653                                         $output .= $arg['name'] . ">";
 654                                         if ( $k < count( $this->mArgList ) - 1 )
 655                                                 $output .= " <";
 656                                 }
 657                         }
 658                         $this->output( "$output\n" );
 659                         foreach ( $this->mParams as $par => $info ) {
 660                                 $this->output(
 661                                         wordwrap( "$tab$par : " . $info['desc'], $descWidth,
 662                                                         "\n$tab$tab" ) . "\n"
 663                                 );
 664                         }
 665                         foreach ( $this->mArgList as $info ) {
 666                                 $this->output(
 667                                         wordwrap( "$tab<" . $info['name'] . "> : " .
 668                                                 $info['desc'], $descWidth, "\n$tab$tab" ) . "\n"
 669                                 );
 670                         }
 671                         die( 1 );
 672                 }
 673         }
 674
 675         /**
 676          * Handle some last-minute setup here.
 677          */
 678         public function finalSetup() {
 679                 global $wgCommandLineMode, $wgShowSQLErrors;
 680                 global $wgProfiling, $wgDBadminuser, $wgDBadminpassword;
 681                 global $wgDBuser, $wgDBpassword, $wgDBservers, $wgLBFactoryConf;
 682
 683                 # Turn off output buffering again, it might have been turned on in the settings files
 684                 if ( ob_get_level() ) {
 685                         ob_end_flush();
 686                 }
 687                 # Same with these
 688                 $wgCommandLineMode = true;
 689
 690                 # If these were passed, use them
 691                 if ( $this->mDbUser ) {
 692                         $wgDBadminuser = $this->mDbUser;
 693                 }
 694                 if ( $this->mDbPass ) {
 695                         $wgDBadminpassword = $this->mDbPass;
 696                 }
 697
 698                 if ( $this->getDbType() == self::DB_ADMIN && isset( $wgDBadminuser ) ) {
 699                         $wgDBuser = $wgDBadminuser;
 700                         $wgDBpassword = $wgDBadminpassword;
 701
 702                         if ( $wgDBservers ) {
 703                                 foreach ( $wgDBservers as $i => $server ) {
 704                                         $wgDBservers[$i]['user'] = $wgDBuser;
 705                                         $wgDBservers[$i]['password'] = $wgDBpassword;
 706                                 }
 707                         }
 708                         if ( isset( $wgLBFactoryConf['serverTemplate'] ) ) {
 709                                 $wgLBFactoryConf['serverTemplate']['user'] = $wgDBuser;
 710                                 $wgLBFactoryConf['serverTemplate']['password'] = $wgDBpassword;
 711                         }
 712                         LBFactory::destroyInstance();
 713                 }
 714
 715                 $this->afterFinalSetup();
 716
 717                 $wgShowSQLErrors = true;
 718                 @set_time_limit( 0 );
 719                 $this->adjustMemoryLimit();
 720
 721                 $wgProfiling = false; // only for Profiler.php mode; avoids OOM errors
 722         }
 723
 724         /**
 725          * Execute a callback function at the end of initialisation
 726          */
 727         protected function afterFinalSetup() {
 728                 if ( defined( 'MW_CMDLINE_CALLBACK' ) ) {
 729                         call_user_func( MW_CMDLINE_CALLBACK );
 730                 }
 731         }
 732
 733         /**
 734          * Potentially debug globals. Originally a feature only
 735          * for refreshLinks
 736          */
 737         public function globals() {
 738                 if ( $this->hasOption( 'globals' ) ) {
 739                         print_r( $GLOBALS );
 740                 }
 741         }
 742
 743         /**
 744          * Do setup specific to WMF
 745          */
 746         public function loadWikimediaSettings() {
 747                 global $IP, $wgNoDBParam, $wgUseNormalUser, $wgConf, $site, $lang;
 748
 749                 if ( empty( $wgNoDBParam ) ) {
 750                         # Check if we were passed a db name
 751                         if ( isset( $this->mOptions['wiki'] ) ) {
 752                                 $db = $this->mOptions['wiki'];
 753                         } else {
 754                                 $db = array_shift( $this->mArgs );
 755                         }
 756                         list( $site, $lang ) = $wgConf->siteFromDB( $db );
 757
 758                         # If not, work out the language and site the old way
 759                         if ( is_null( $site ) || is_null( $lang ) ) {
 760                                 if ( !$db ) {
 761                                         $lang = 'aa';
 762                                 } else {
 763                                         $lang = $db;
 764                                 }
 765                                 if ( isset( $this->mArgs[0] ) ) {
 766                                         $site = array_shift( $this->mArgs );
 767                                 } else {
 768                                         $site = 'wikipedia';
 769                                 }
 770                         }
 771                 } else {
 772                         $lang = 'aa';
 773                         $site = 'wikipedia';
 774                 }
 775
 776                 # This is for the IRC scripts, which now run as the apache user
 777                 # The apache user doesn't have access to the wikiadmin_pass command
 778                 if ( $_ENV['USER'] == 'apache' ) {
 779                 # if ( posix_geteuid() == 48 ) {
 780                         $wgUseNormalUser = true;
 781                 }
 782
 783                 putenv( 'wikilang=' . $lang );
 784
 785                 ini_set( 'include_path', ".:$IP:$IP/includes:$IP/languages:$IP/maintenance" );
 786
 787                 if ( $lang == 'test' && $site == 'wikipedia' ) {
 788                         define( 'TESTWIKI', 1 );
 789                 }
 790         }
 791
 792         /**
 793          * Generic setup for most installs. Returns the location of LocalSettings
 794          * @return String
 795          */
 796         public function loadSettings() {
 797                 global $wgWikiFarm, $wgCommandLineMode, $IP;
 798
 799                 $wgWikiFarm = false;
 800                 if ( isset( $this->mOptions['conf'] ) ) {
 801                         $settingsFile = $this->mOptions['conf'];
 802                 } else {
 803                         $settingsFile = "$IP/LocalSettings.php";
 804                 }
 805                 if ( isset( $this->mOptions['wiki'] ) ) {
 806                         $bits = explode( '-', $this->mOptions['wiki'] );
 807                         if ( count( $bits ) == 1 ) {
 808                                 $bits[] = '';
 809                         }
 810                         define( 'MW_DB', $bits[0] );
 811                         define( 'MW_PREFIX', $bits[1] );
 812                 }
 813
 814                 if ( !is_readable( $settingsFile ) ) {
 815                         $this->error( "A copy of your installation's LocalSettings.php\n" .
 816                                                 "must exist and be readable in the source directory.", true );
 817                 }
 818                 $wgCommandLineMode = true;
 819                 return $settingsFile;
 820         }
 821
 822         /**
 823          * Support function for cleaning up redundant text records
 824          * @param $delete Boolean: whether or not to actually delete the records
 825          * @author Rob Church <robchur@gmail.com>
 826          */
 827         public function purgeRedundantText( $delete = true ) {
 828                 # Data should come off the master, wrapped in a transaction
 829                 $dbw = wfGetDB( DB_MASTER );
 830                 $dbw->begin();
 831
 832                 $tbl_arc = $dbw->tableName( 'archive' );
 833                 $tbl_rev = $dbw->tableName( 'revision' );
 834                 $tbl_txt = $dbw->tableName( 'text' );
 835
 836                 # Get "active" text records from the revisions table
 837                 $this->output( 'Searching for active text records in revisions table...' );
 838                 $res = $dbw->query( "SELECT DISTINCT rev_text_id FROM $tbl_rev" );
 839                 foreach ( $res as $row ) {
 840                         $cur[] = $row->rev_text_id;
 841                 }
 842                 $this->output( "done.\n" );
 843
 844                 # Get "active" text records from the archive table
 845                 $this->output( 'Searching for active text records in archive table...' );
 846                 $res = $dbw->query( "SELECT DISTINCT ar_text_id FROM $tbl_arc" );
 847                 foreach ( $res as $row ) {
 848                         $cur[] = $row->ar_text_id;
 849                 }
 850                 $this->output( "done.\n" );
 851
 852                 # Get the IDs of all text records not in these sets
 853                 $this->output( 'Searching for inactive text records...' );
 854                 $set = implode( ', ', $cur );
 855                 $res = $dbw->query( "SELECT old_id FROM $tbl_txt WHERE old_id NOT IN ( $set )" );
 856                 $old = array();
 857                 foreach ( $res as $row ) {
 858                         $old[] = $row->old_id;
 859                 }
 860                 $this->output( "done.\n" );
 861
 862                 # Inform the user of what we're going to do
 863                 $count = count( $old );
 864                 $this->output( "$count inactive items found.\n" );
 865
 866                 # Delete as appropriate
 867                 if ( $delete && $count ) {
 868                         $this->output( 'Deleting...' );
 869                         $set = implode( ', ', $old );
 870                         $dbw->query( "DELETE FROM $tbl_txt WHERE old_id IN ( $set )" );
 871                         $this->output( "done.\n" );
 872                 }
 873
 874                 # Done
 875                 $dbw->commit();
 876         }
 877
 878         /**
 879          * Get the maintenance directory.
 880          */
 881         protected function getDir() {
 882                 return dirname( __FILE__ );
 883         }
 884
 885         /**
 886          * Get the list of available maintenance scripts. Note
 887          * that if you call this _before_ calling doMaintenance
 888          * you won't have any extensions in it yet
 889          * @return Array
 890          */
 891         public static function getMaintenanceScripts() {
 892                 global $wgMaintenanceScripts;
 893                 return $wgMaintenanceScripts + self::getCoreScripts();
 894         }
 895
 896         /**
 897          * Return all of the core maintenance scripts
 898          * @return array
 899          */
 900         protected static function getCoreScripts() {
 901                 if ( !self::$mCoreScripts ) {
 902                         self::disableSetup();
 903                         $paths = array(
 904                                 dirname( __FILE__ ),
 905                                 dirname( __FILE__ ) . '/gearman',
 906                                 dirname( __FILE__ ) . '/language',
 907                                 dirname( __FILE__ ) . '/storage',
 908                         );
 909                         self::$mCoreScripts = array();
 910                         foreach ( $paths as $p ) {
 911                                 $handle = opendir( $p );
 912                                 while ( ( $file = readdir( $handle ) ) !== false ) {
 913                                         if ( $file == 'Maintenance.php' ) {
 914                                                 continue;
 915                                         }
 916                                         $file = $p . '/' . $file;
 917                                         if ( is_dir( $file ) || !strpos( $file, '.php' ) ||
 918                                                 ( strpos( file_get_contents( $file ), '$maintClass' ) === false ) ) {
 919                                                 continue;
 920                                         }
 921                                         require( $file );
 922                                         $vars = get_defined_vars();
 923                                         if ( array_key_exists( 'maintClass', $vars ) ) {
 924                                                 self::$mCoreScripts[$vars['maintClass']] = $file;
 925                                         }
 926                                 }
 927                                 closedir( $handle );
 928                         }
 929                 }
 930                 return self::$mCoreScripts;
 931         }
 932
 933         /**
 934          * Lock the search index
 935          * @param &$db Database object
 936          */
 937         private function lockSearchindex( &$db ) {
 938                 $write = array( 'searchindex' );
 939                 $read = array( 'page', 'revision', 'text', 'interwiki', 'l10n_cache' );
 940                 $db->lockTables( $read, $write, __CLASS__ . '::' . __METHOD__ );
 941         }
 942
 943         /**
 944          * Unlock the tables
 945          * @param &$db Database object
 946          */
 947         private function unlockSearchindex( &$db ) {
 948                 $db->unlockTables(  __CLASS__ . '::' . __METHOD__ );
 949         }
 950
 951         /**
 952          * Unlock and lock again
 953          * Since the lock is low-priority, queued reads will be able to complete
 954          * @param &$db Database object
 955          */
 956         private function relockSearchindex( &$db ) {
 957                 $this->unlockSearchindex( $db );
 958                 $this->lockSearchindex( $db );
 959         }
 960
 961         /**
 962          * Perform a search index update with locking
 963          * @param $maxLockTime Integer: the maximum time to keep the search index locked.
 964          * @param $callback callback String: the function that will update the function.
 965          * @param $dbw Database object
 966          * @param $results
 967          */
 968         public function updateSearchIndex( $maxLockTime, $callback, $dbw, $results ) {
 969                 $lockTime = time();
 970
 971                 # Lock searchindex
 972                 if ( $maxLockTime ) {
 973                         $this->output( "   --- Waiting for lock ---" );
 974                         $this->lockSearchindex( $dbw );
 975                         $lockTime = time();
 976                         $this->output( "\n" );
 977                 }
 978
 979                 # Loop through the results and do a search update
 980                 foreach ( $results as $row ) {
 981                         # Allow reads to be processed
 982                         if ( $maxLockTime && time() > $lockTime + $maxLockTime ) {
 983                                 $this->output( "    --- Relocking ---" );
 984                                 $this->relockSearchindex( $dbw );
 985                                 $lockTime = time();
 986                                 $this->output( "\n" );
 987                         }
 988                         call_user_func( $callback, $dbw, $row );
 989                 }
 990
 991                 # Unlock searchindex
 992                 if ( $maxLockTime ) {
 993                         $this->output( "    --- Unlocking --" );
 994                         $this->unlockSearchindex( $dbw );
 995                         $this->output( "\n" );
 996                 }
 997
 998         }
 999
1000         /**
1001          * Update the searchindex table for a given pageid
1002          * @param $dbw Database: a database write handle
1003          * @param $pageId Integer: the page ID to update.
1004          */
1005         public function updateSearchIndexForPage( $dbw, $pageId ) {
1006                 // Get current revision
1007                 $rev = Revision::loadFromPageId( $dbw, $pageId );
1008                 $title = null;
1009                 if ( $rev ) {
1010                         $titleObj = $rev->getTitle();
1011                         $title = $titleObj->getPrefixedDBkey();
1012                         $this->output( "$title..." );
1013                         # Update searchindex
1014                         $u = new SearchUpdate( $pageId, $titleObj->getText(), $rev->getText() );
1015                         $u->doUpdate();
1016                         $this->output( "\n" );
1017                 }
1018                 return $title;
1019         }
1020
1021 }