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 // Make sure we're on PHP5 or better
  13 if ( version_compare( PHP_VERSION, '5.1.0' ) < 0 ) {
  14         die ( "Sorry! This version of MediaWiki requires PHP 5.1.x; you are running " .
  15                 PHP_VERSION . ".\n\n" .
  16                 "If you are sure you already have PHP 5.1.x or higher installed, it may be\n" .
  17                 "installed in a different path from PHP " . PHP_VERSION . ". Check with your system\n" .
  18                 "administrator.\n" );
  19 }
  20
  21 /**
  22  * Abstract maintenance class for quickly writing and churning out
  23  * maintenance scripts with minimal effort. All that _must_ be defined
  24  * is the execute() method. See docs/maintenance.txt for more info
  25  * and a quick demo of how to use it.
  26  *
  27  * This program is free software; you can redistribute it and/or modify
  28  * it under the terms of the GNU General Public License as published by
  29  * the Free Software Foundation; either version 2 of the License, or
  30  * (at your option) any later version.
  31  *
  32  * This program is distributed in the hope that it will be useful,
  33  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  34  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  35  * GNU General Public License for more details.
  36  *
  37  * You should have received a copy of the GNU General Public License along
  38  * with this program; if not, write to the Free Software Foundation, Inc.,
  39  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  40  * http://www.gnu.org/copyleft/gpl.html
  41  *
  42  * @author Chad Horohoe <chad@anyonecanedit.org>
  43  * @since 1.16
  44  * @ingroup Maintenance
  45  */
  46 abstract class Maintenance {
  47
  48         /**
  49          * Constants for DB access type
  50          * @see Maintenance::getDbType()
  51          */
  52         const DB_NONE  = 0;
  53         const DB_STD   = 1;
  54         const DB_ADMIN = 2;
  55
  56         // Const for getStdin()
  57         const STDIN_ALL = 'all';
  58
  59         // This is the desired params
  60         protected $mParams = array();
  61
  62         // Array of desired args
  63         protected $mArgList = array();
  64
  65         // This is the list of options that were actually passed
  66         protected $mOptions = array();
  67
  68         // This is the list of arguments that were actually passed
  69         protected $mArgs = array();
  70
  71         // Name of the script currently running
  72         protected $mSelf;
  73
  74         // Special vars for params that are always used
  75         protected $mQuiet = false;
  76         protected $mDbUser, $mDbPass;
  77
  78         // A description of the script, children should change this
  79         protected $mDescription = '';
  80
  81         // Have we already loaded our user input?
  82         protected $mInputLoaded = false;
  83
  84         // Batch size. If a script supports this, they should set
  85         // a default with setBatchSize()
  86         protected $mBatchSize = null;
  87
  88         /**
  89          * List of all the core maintenance scripts. This is added
  90          * to scripts added by extensions in $wgMaintenanceScripts
  91          * and returned by getMaintenanceScripts()
  92          */
  93         protected static $mCoreScripts = null;
  94
  95         /**
  96          * Default constructor. Children should call this if implementing
  97          * their own constructors
  98          */
  99         public function __construct() {
 100                 $this->addDefaultParams();
 101                 register_shutdown_function( array( $this, 'outputChanneled' ), false );
 102         }
 103
 104         /**
 105          * Do the actual work. All child classes will need to implement this
 106          */
 107         abstract public function execute();
 108
 109         /**
 110          * Add a parameter to the script. Will be displayed on --help
 111          * with the associated description
 112          *
 113          * @param $name String: the name of the param (help, version, etc)
 114          * @param $description String: the description of the param to show on --help
 115          * @param $required Boolean: is the param required?
 116          * @param $withArg Boolean: is an argument required with this option?
 117          */
 118         protected function addOption( $name, $description, $required = false, $withArg = false ) {
 119                 $this->mParams[$name] = array( 'desc' => $description, 'require' => $required, 'withArg' => $withArg );
 120         }
 121
 122         /**
 123          * Checks to see if a particular param exists.
 124          * @param $name String: the name of the param
 125          * @return Boolean
 126          */
 127         protected function hasOption( $name ) {
 128                 return isset( $this->mOptions[$name] );
 129         }
 130
 131         /**
 132          * Get an option, or return the default
 133          * @param $name String: the name of the param
 134          * @param $default Mixed: anything you want, default null
 135          * @return Mixed
 136          */
 137         protected function getOption( $name, $default = null ) {
 138                 if ( $this->hasOption( $name ) ) {
 139                         return $this->mOptions[$name];
 140                 } else {
 141                         // Set it so we don't have to provide the default again
 142                         $this->mOptions[$name] = $default;
 143                         return $this->mOptions[$name];
 144                 }
 145         }
 146
 147         /**
 148          * Add some args that are needed
 149          * @param $arg String: name of the arg, like 'start'
 150          * @param $description String: short description of the arg
 151          * @param $required Boolean: is this required?
 152          */
 153         protected function addArg( $arg, $description, $required = true ) {
 154                 $this->mArgList[] = array(
 155                         'name' => $arg,
 156                         'desc' => $description,
 157                         'require' => $required
 158                 );
 159         }
 160
 161         /**
 162          * Remove an option.  Useful for removing options that won't be used in your script.
 163          * @param $name String: the option to remove.
 164          */
 165         protected function deleteOption( $name ) {
 166                 unset( $this->mParams[$name] );
 167         }
 168
 169         /**
 170          * Set the description text.
 171          * @param $text String: the text of the description
 172          */
 173         protected function addDescription( $text ) {
 174                 $this->mDescription = $text;
 175         }
 176
 177         /**
 178          * Does a given argument exist?
 179          * @param $argId Integer: the integer value (from zero) for the arg
 180          * @return Boolean
 181          */
 182         protected function hasArg( $argId = 0 ) {
 183                 return isset( $this->mArgs[$argId] );
 184         }
 185
 186         /**
 187          * Get an argument.
 188          * @param $argId Integer: the integer value (from zero) for the arg
 189          * @param $default Mixed: the default if it doesn't exist
 190          * @return mixed
 191          */
 192         protected function getArg( $argId = 0, $default = null ) {
 193                 return $this->hasArg( $argId ) ? $this->mArgs[$argId] : $default;
 194         }
 195
 196         /**
 197          * Set the batch size.
 198          * @param $s Integer: the number of operations to do in a batch
 199          */
 200         protected function setBatchSize( $s = 0 ) {
 201                 $this->mBatchSize = $s;
 202         }
 203
 204         /**
 205          * Get the script's name
 206          * @return String
 207          */
 208         public function getName() {
 209                 return $this->mSelf;
 210         }
 211
 212         /**
 213          * Return input from stdin.
 214          * @param $len Integer: the number of bytes to read. If null,
 215          *        just return the handle. Maintenance::STDIN_ALL returns
 216          *        the full length
 217          * @return Mixed
 218          */
 219         protected function getStdin( $len = null ) {
 220                 if ( $len == Maintenance::STDIN_ALL ) {
 221                         return file_get_contents( 'php://stdin' );
 222                 }
 223                 $f = fopen( 'php://stdin', 'rt' );
 224                 if ( !$len ) {
 225                         return $f;
 226                 }
 227                 $input = fgets( $f, $len );
 228                 fclose( $f );
 229                 return rtrim( $input );
 230         }
 231
 232         public function isQuiet() {
 233                 return $this->mQuiet;
 234         }
 235
 236         /**
 237          * Throw some output to the user. Scripts can call this with no fears,
 238          * as we handle all --quiet stuff here
 239          * @param $out String: the text to show to the user
 240          * @param $channel Mixed: unique identifier for the channel. See
 241          *     function outputChanneled.
 242          */
 243         protected function output( $out, $channel = null ) {
 244                 if ( $this->mQuiet ) {
 245                         return;
 246                 }
 247                 if ( $channel === null ) {
 248                         $this->cleanupChanneled();
 249
 250                         $f = fopen( 'php://stdout', 'w' );
 251                         fwrite( $f, $out );
 252                         fclose( $f );
 253                 }
 254                 else {
 255                         $out = preg_replace( '/\n\z/', '', $out );
 256                         $this->outputChanneled( $out, $channel );
 257                 }
 258         }
 259
 260         /**
 261          * Throw an error to the user. Doesn't respect --quiet, so don't use
 262          * this for non-error output
 263          * @param $err String: the error to display
 264          * @param $die Boolean: If true, go ahead and die out.
 265          */
 266         protected function error( $err, $die = false ) {
 267                 $this->outputChanneled( false );
 268                 if ( php_sapi_name() == 'cli' ) {
 269                         fwrite( STDERR, $err . "\n" );
 270                 } else {
 271                         $f = fopen( 'php://stderr', 'w' );
 272                         fwrite( $f, $err . "\n" );
 273                         fclose( $f );
 274                 }
 275                 if ( $die ) {
 276                         die();
 277                 }
 278         }
 279
 280         private $atLineStart = true;
 281         private $lastChannel = null;
 282
 283         /**
 284          * Clean up channeled output.  Output a newline if necessary.
 285          */
 286         public function cleanupChanneled() {
 287                 if ( !$this->atLineStart ) {
 288                         $handle = fopen( 'php://stdout', 'w' );
 289                         fwrite( $handle, "\n" );
 290                         fclose( $handle );
 291                         $this->atLineStart = true;
 292                 }
 293         }
 294
 295         /**
 296          * Message outputter with channeled message support. Messages on the
 297          * same channel are concatenated, but any intervening messages in another
 298          * channel start a new line.
 299          * @param $msg String: the message without trailing newline
 300          * @param $channel Channel identifier or null for no
 301          *     channel. Channel comparison uses ===.
 302          */
 303         public function outputChanneled( $msg, $channel = null ) {
 304                 if ( $msg === false ) {
 305                         $this->cleanupChanneled();
 306                         return;
 307                 }
 308
 309                 $handle = fopen( 'php://stdout', 'w' );
 310
 311                 // End the current line if necessary
 312                 if ( !$this->atLineStart && $channel !== $this->lastChannel ) {
 313                         fwrite( $handle, "\n" );
 314                 }
 315
 316                 fwrite( $handle, $msg );
 317
 318                 $this->atLineStart = false;
 319                 if ( $channel === null ) {
 320                         // For unchanneled messages, output trailing newline immediately
 321                         fwrite( $handle, "\n" );
 322                         $this->atLineStart = true;
 323                 }
 324                 $this->lastChannel = $channel;
 325
 326                 // Cleanup handle
 327                 fclose( $handle );
 328         }
 329
 330         /**
 331          * Does the script need different DB access? By default, we give Maintenance
 332          * scripts normal rights to the DB. Sometimes, a script needs admin rights
 333          * access for a reason and sometimes they want no access. Subclasses should
 334          * override and return one of the following values, as needed:
 335          *    Maintenance::DB_NONE  -  For no DB access at all
 336          *    Maintenance::DB_STD   -  For normal DB access, default
 337          *    Maintenance::DB_ADMIN -  For admin DB access
 338          * @return Integer
 339          */
 340         public function getDbType() {
 341                 return Maintenance::DB_STD;
 342         }
 343
 344         /**
 345          * Add the default parameters to the scripts
 346          */
 347         protected function addDefaultParams() {
 348                 $this->addOption( 'help', 'Display this help message' );
 349                 $this->addOption( 'quiet', 'Whether to supress non-error output' );
 350                 $this->addOption( 'conf', 'Location of LocalSettings.php, if not default', false, true );
 351                 $this->addOption( 'wiki', 'For specifying the wiki ID', false, true );
 352                 $this->addOption( 'globals', 'Output globals at the end of processing for debugging' );
 353                 $this->addOption( 'memory-limit', 'Set a specific memory limit for the script, "max" for no limit or "default" to avoid changing it' );
 354                 // If we support a DB, show the options
 355                 if ( $this->getDbType() > 0 ) {
 356                         $this->addOption( 'dbuser', 'The DB user to use for this script', false, true );
 357                         $this->addOption( 'dbpass', 'The password to use for this script', false, true );
 358                 }
 359                 // If we support $mBatchSize, show the option
 360                 if ( $this->mBatchSize ) {
 361                         $this->addOption( 'batch-size', 'Run this many operations ' .
 362                                 'per batch, default: ' . $this->mBatchSize, false, true );
 363                 }
 364         }
 365
 366         /**
 367          * Run a child maintenance script. Pass all of the current arguments
 368          * to it.
 369          * @param $maintClass String: a name of a child maintenance class
 370          * @param $classFile String: full path of where the child is
 371          * @return Maintenance child
 372          */
 373         public function runChild( $maintClass, $classFile = null ) {
 374                 // If we haven't already specified, kill setup procedures
 375                 // for child scripts, we've already got a sane environment
 376                 self::disableSetup();
 377
 378                 // Make sure the class is loaded first
 379                 if ( !class_exists( $maintClass ) ) {
 380                         if ( $classFile ) {
 381                                 require_once( $classFile );
 382                         }
 383                         if ( !class_exists( $maintClass ) ) {
 384                                 $this->error( "Cannot spawn child: $maintClass" );
 385                         }
 386                 }
 387
 388                 $child = new $maintClass();
 389                 $child->loadParamsAndArgs( $this->mSelf, $this->mOptions, $this->mArgs );
 390                 return $child;
 391         }
 392
 393         /**
 394          * Disable Setup.php mostly
 395          */
 396         protected static function disableSetup() {
 397                 if ( !defined( 'MW_NO_SETUP' ) ) {
 398                         define( 'MW_NO_SETUP', true );
 399                 }
 400         }
 401
 402         /**
 403          * Do some sanity checking and basic setup
 404          */
 405         public function setup() {
 406                 global $IP, $wgCommandLineMode, $wgRequestTime;
 407
 408                 # Abort if called from a web server
 409                 if ( isset( $_SERVER ) && isset( $_SERVER['REQUEST_METHOD'] ) ) {
 410                         $this->error( 'This script must be run from the command line', true );
 411                 }
 412
 413                 # Make sure we can handle script parameters
 414                 if ( !ini_get( 'register_argc_argv' ) ) {
 415                         $this->error( 'Cannot get command line arguments, register_argc_argv is set to false', true );
 416                 }
 417
 418                 if ( version_compare( phpversion(), '5.2.4' ) >= 0 ) {
 419                         // Send PHP warnings and errors to stderr instead of stdout.
 420                         // This aids in diagnosing problems, while keeping messages
 421                         // out of redirected output.
 422                         if ( ini_get( 'display_errors' ) ) {
 423                                 ini_set( 'display_errors', 'stderr' );
 424                         }
 425
 426                         // Don't touch the setting on earlier versions of PHP,
 427                         // as setting it would disable output if you'd wanted it.
 428
 429                         // Note that exceptions are also sent to stderr when
 430                         // command-line mode is on, regardless of PHP version.
 431                 }
 432
 433                 $this->loadParamsAndArgs();
 434                 $this->maybeHelp();
 435
 436                 # Set the memory limit
 437                 # Note we need to set it again later in cache LocalSettings changed it
 438                 $this->adjustMemoryLimit();
 439
 440                 # Set max execution time to 0 (no limit). PHP.net says that
 441                 # "When running PHP from the command line the default setting is 0."
 442                 # But sometimes this doesn't seem to be the case.
 443                 ini_set( 'max_execution_time', 0 );
 444
 445                 $wgRequestTime = microtime( true );
 446
 447                 # Define us as being in MediaWiki
 448                 define( 'MEDIAWIKI', true );
 449
 450                 # Setup $IP, using MW_INSTALL_PATH if it exists
 451                 $IP = strval( getenv( 'MW_INSTALL_PATH' ) ) !== ''
 452                         ? getenv( 'MW_INSTALL_PATH' )
 453                         : realpath( dirname( __FILE__ ) . '/..' );
 454
 455                 $wgCommandLineMode = true;
 456                 # Turn off output buffering if it's on
 457                 @ob_end_flush();
 458
 459                 $this->validateParamsAndArgs();
 460         }
 461
 462         /**
 463          * Normally we disable the memory_limit when running admin scripts.
 464          * Some scripts may wish to actually set a limit, however, to avoid
 465          * blowing up unexpectedly. We also support a --memory-limit option,
 466          * to allow sysadmins to explicitly set one if they'd prefer to override
 467          * defaults (or for people using Suhosin which yells at you for trying
 468          * to disable the limits)
 469          */
 470         public function memoryLimit() {
 471                 $limit = $this->getOption( 'memory-limit', 'max' );
 472                 $limit = trim( $limit, "\" '" ); // trim quotes in case someone misunderstood
 473                 return $limit;
 474         }
 475
 476         /**
 477          * Adjusts PHP's memory limit to better suit our needs, if needed.
 478          */
 479         protected function adjustMemoryLimit() {
 480                 $limit = $this->memoryLimit();
 481                 if ( $limit == 'max' ) {
 482                         $limit = -1; // no memory limit
 483                 }
 484                 if ( $limit != 'default' ) {
 485                         ini_set( 'memory_limit', $limit );
 486                 }
 487         }
 488
 489         /**
 490          * Clear all params and arguments.
 491          */
 492         public function clearParamsAndArgs() {
 493                 $this->mOptions = array();
 494                 $this->mArgs = array();
 495                 $this->mInputLoaded = false;
 496         }
 497
 498         /**
 499          * Process command line arguments
 500          * $mOptions becomes an array with keys set to the option names
 501          * $mArgs becomes a zero-based array containing the non-option arguments
 502          *
 503          * @param $self String The name of the script, if any
 504          * @param $opts Array An array of options, in form of key=>value
 505          * @param $args Array An array of command line arguments
 506          */
 507         public function loadParamsAndArgs( $self = null, $opts = null, $args = null ) {
 508                 # If we were given opts or args, set those and return early
 509                 if ( $self ) {
 510                         $this->mSelf = $self;
 511                         $this->mInputLoaded = true;
 512                 }
 513                 if ( $opts ) {
 514                         $this->mOptions = $opts;
 515                         $this->mInputLoaded = true;
 516                 }
 517                 if ( $args ) {
 518                         $this->mArgs = $args;
 519                         $this->mInputLoaded = true;
 520                 }
 521
 522                 # If we've already loaded input (either by user values or from $argv)
 523                 # skip on loading it again. The array_shift() will corrupt values if
 524                 # it's run again and again
 525                 if ( $this->mInputLoaded ) {
 526                         $this->loadSpecialVars();
 527                         return;
 528                 }
 529
 530                 global $argv;
 531                 $this->mSelf = array_shift( $argv );
 532
 533                 $options = array();
 534                 $args = array();
 535
 536                 # Parse arguments
 537                 for ( $arg = reset( $argv ); $arg !== false; $arg = next( $argv ) ) {
 538                         if ( $arg == '--' ) {
 539                                 # End of options, remainder should be considered arguments
 540                                 $arg = next( $argv );
 541                                 while ( $arg !== false ) {
 542                                         $args[] = $arg;
 543                                         $arg = next( $argv );
 544                                 }
 545                                 break;
 546                         } elseif ( substr( $arg, 0, 2 ) == '--' ) {
 547                                 # Long options
 548                                 $option = substr( $arg, 2 );
 549                                 if ( isset( $this->mParams[$option] ) && $this->mParams[$option]['withArg'] ) {
 550                                         $param = next( $argv );
 551                                         if ( $param === false ) {
 552                                                 $this->error( "\nERROR: $option needs a value after it\n" );
 553                                                 $this->maybeHelp( true );
 554                                         }
 555                                         $options[$option] = $param;
 556                                 } else {
 557                                         $bits = explode( '=', $option, 2 );
 558                                         if ( count( $bits ) > 1 ) {
 559                                                 $option = $bits[0];
 560                                                 $param = $bits[1];
 561                                         } else {
 562                                                 $param = 1;
 563                                         }
 564                                         $options[$option] = $param;
 565                                 }
 566                         } elseif ( substr( $arg, 0, 1 ) == '-' ) {
 567                                 # Short options
 568                                 for ( $p = 1; $p < strlen( $arg ); $p++ ) {
 569                                         $option = $arg { $p } ;
 570                                         if ( isset( $this->mParams[$option]['withArg'] ) && $this->mParams[$option]['withArg'] ) {
 571                                                 $param = next( $argv );
 572                                                 if ( $param === false ) {
 573                                                         $this->error( "\nERROR: $option needs a value after it\n" );
 574                                                         $this->maybeHelp( true );
 575                                                 }
 576                                                 $options[$option] = $param;
 577                                         } else {
 578                                                 $options[$option] = 1;
 579                                         }
 580                                 }
 581                         } else {
 582                                 $args[] = $arg;
 583                         }
 584                 }
 585
 586                 $this->mOptions = $options;
 587                 $this->mArgs = $args;
 588                 $this->loadSpecialVars();
 589                 $this->mInputLoaded = true;
 590         }
 591
 592         /**
 593          * Run some validation checks on the params, etc
 594          */
 595         protected function validateParamsAndArgs() {
 596                 $die = false;
 597                 # Check to make sure we've got all the required options
 598                 foreach ( $this->mParams as $opt => $info ) {
 599                         if ( $info['require'] && !$this->hasOption( $opt ) ) {
 600                                 $this->error( "Param $opt required!" );
 601                                 $die = true;
 602                         }
 603                 }
 604                 # Check arg list too
 605                 foreach ( $this->mArgList as $k => $info ) {
 606                         if ( $info['require'] && !$this->hasArg( $k ) ) {
 607                                 $this->error( 'Argument <' . $info['name'] . '> required!' );
 608                                 $die = true;
 609                         }
 610                 }
 611
 612                 if ( $die ) {
 613                         $this->maybeHelp( true );
 614                 }
 615         }
 616
 617         /**
 618          * Handle the special variables that are global to all scripts
 619          */
 620         protected function loadSpecialVars() {
 621                 if ( $this->hasOption( 'dbuser' ) ) {
 622                         $this->mDbUser = $this->getOption( 'dbuser' );
 623                 }
 624                 if ( $this->hasOption( 'dbpass' ) ) {
 625                         $this->mDbPass = $this->getOption( 'dbpass' );
 626                 }
 627                 if ( $this->hasOption( 'quiet' ) ) {
 628                         $this->mQuiet = true;
 629                 }
 630                 if ( $this->hasOption( 'batch-size' ) ) {
 631                         $this->mBatchSize = $this->getOption( 'batch-size' );
 632                 }
 633         }
 634
 635         /**
 636          * Maybe show the help.
 637          * @param $force boolean Whether to force the help to show, default false
 638          */
 639         protected function maybeHelp( $force = false ) {
 640                 if( !$force && !$this->hasOption( 'help' ) ) {
 641                         return;
 642                 }
 643
 644                 $screenWidth = 80; // TODO: Caculate this!
 645                 $tab = "    ";
 646                 $descWidth = $screenWidth - ( 2 * strlen( $tab ) );
 647
 648                 ksort( $this->mParams );
 649                 $this->mQuiet = false;
 650
 651                 // Description ...
 652                 if ( $this->mDescription ) {
 653                         $this->output( "\n" . $this->mDescription . "\n" );
 654                 }
 655                 $output = "\nUsage: php " . basename( $this->mSelf );
 656
 657                 // ... append parameters ...
 658                 if ( $this->mParams ) {
 659                         $output .= " [--" . implode( array_keys( $this->mParams ), "|--" ) . "]";
 660                 }
 661
 662                 // ... and append arguments.
 663                 if ( $this->mArgList ) {
 664                         $output .= " <";
 665                         foreach ( $this->mArgList as $k => $arg ) {
 666                                 $output .= $arg['name'] . ">";
 667                                 if ( $k < count( $this->mArgList ) - 1 )
 668                                         $output .= " <";
 669                         }
 670                 }
 671                 $this->output( "$output\n\n" );
 672
 673                 // Parameters description
 674                 foreach ( $this->mParams as $par => $info ) {
 675                         $this->output(
 676                                 wordwrap( "$tab--$par: " . $info['desc'], $descWidth,
 677                                                 "\n$tab$tab" ) . "\n"
 678                         );
 679                 }
 680
 681                 // Arguments description
 682                 foreach ( $this->mArgList as $info ) {
 683                         $this->output(
 684                                 wordwrap( "$tab<" . $info['name'] . ">: " .
 685                                         $info['desc'], $descWidth, "\n$tab$tab" ) . "\n"
 686                         );
 687                 }
 688
 689                 die( 1 );
 690         }
 691
 692         /**
 693          * Handle some last-minute setup here.
 694          */
 695         public function finalSetup() {
 696                 global $wgCommandLineMode, $wgShowSQLErrors;
 697                 global $wgProfiling, $wgDBadminuser, $wgDBadminpassword;
 698                 global $wgDBuser, $wgDBpassword, $wgDBservers, $wgLBFactoryConf;
 699
 700                 # Turn off output buffering again, it might have been turned on in the settings files
 701                 if ( ob_get_level() ) {
 702                         ob_end_flush();
 703                 }
 704                 # Same with these
 705                 $wgCommandLineMode = true;
 706
 707                 # If these were passed, use them
 708                 if ( $this->mDbUser ) {
 709                         $wgDBadminuser = $this->mDbUser;
 710                 }
 711                 if ( $this->mDbPass ) {
 712                         $wgDBadminpassword = $this->mDbPass;
 713                 }
 714
 715                 if ( $this->getDbType() == self::DB_ADMIN && isset( $wgDBadminuser ) ) {
 716                         $wgDBuser = $wgDBadminuser;
 717                         $wgDBpassword = $wgDBadminpassword;
 718
 719                         if ( $wgDBservers ) {
 720                                 foreach ( $wgDBservers as $i => $server ) {
 721                                         $wgDBservers[$i]['user'] = $wgDBuser;
 722                                         $wgDBservers[$i]['password'] = $wgDBpassword;
 723                                 }
 724                         }
 725                         if ( isset( $wgLBFactoryConf['serverTemplate'] ) ) {
 726                                 $wgLBFactoryConf['serverTemplate']['user'] = $wgDBuser;
 727                                 $wgLBFactoryConf['serverTemplate']['password'] = $wgDBpassword;
 728                         }
 729                         LBFactory::destroyInstance();
 730                 }
 731
 732                 $this->afterFinalSetup();
 733
 734                 $wgShowSQLErrors = true;
 735                 @set_time_limit( 0 );
 736                 $this->adjustMemoryLimit();
 737
 738                 $wgProfiling = false; // only for Profiler.php mode; avoids OOM errors
 739         }
 740
 741         /**
 742          * Execute a callback function at the end of initialisation
 743          */
 744         protected function afterFinalSetup() {
 745                 if ( defined( 'MW_CMDLINE_CALLBACK' ) ) {
 746                         call_user_func( MW_CMDLINE_CALLBACK );
 747                 }
 748         }
 749
 750         /**
 751          * Potentially debug globals. Originally a feature only
 752          * for refreshLinks
 753          */
 754         public function globals() {
 755                 if ( $this->hasOption( 'globals' ) ) {
 756                         print_r( $GLOBALS );
 757                 }
 758         }
 759
 760         /**
 761          * Do setup specific to WMF
 762          */
 763         public function loadWikimediaSettings() {
 764                 global $IP, $wgNoDBParam, $wgUseNormalUser, $wgConf, $site, $lang;
 765
 766                 if ( empty( $wgNoDBParam ) ) {
 767                         # Check if we were passed a db name
 768                         if ( isset( $this->mOptions['wiki'] ) ) {
 769                                 $db = $this->mOptions['wiki'];
 770                         } else {
 771                                 $db = array_shift( $this->mArgs );
 772                         }
 773                         list( $site, $lang ) = $wgConf->siteFromDB( $db );
 774
 775                         # If not, work out the language and site the old way
 776                         if ( is_null( $site ) || is_null( $lang ) ) {
 777                                 if ( !$db ) {
 778                                         $lang = 'aa';
 779                                 } else {
 780                                         $lang = $db;
 781                                 }
 782                                 if ( isset( $this->mArgs[0] ) ) {
 783                                         $site = array_shift( $this->mArgs );
 784                                 } else {
 785                                         $site = 'wikipedia';
 786                                 }
 787                         }
 788                 } else {
 789                         $lang = 'aa';
 790                         $site = 'wikipedia';
 791                 }
 792
 793                 # This is for the IRC scripts, which now run as the apache user
 794                 # The apache user doesn't have access to the wikiadmin_pass command
 795                 if ( $_ENV['USER'] == 'apache' ) {
 796                 # if ( posix_geteuid() == 48 ) {
 797                         $wgUseNormalUser = true;
 798                 }
 799
 800                 putenv( 'wikilang=' . $lang );
 801
 802                 ini_set( 'include_path', ".:$IP:$IP/includes:$IP/languages:$IP/maintenance" );
 803
 804                 if ( $lang == 'test' && $site == 'wikipedia' ) {
 805                         define( 'TESTWIKI', 1 );
 806                 }
 807         }
 808
 809         /**
 810          * Generic setup for most installs. Returns the location of LocalSettings
 811          * @return String
 812          */
 813         public function loadSettings() {
 814                 global $wgWikiFarm, $wgCommandLineMode, $IP;
 815
 816                 $wgWikiFarm = false;
 817                 if ( isset( $this->mOptions['conf'] ) ) {
 818                         $settingsFile = $this->mOptions['conf'];
 819                 } else {
 820                         $settingsFile = "$IP/LocalSettings.php";
 821                 }
 822                 if ( isset( $this->mOptions['wiki'] ) ) {
 823                         $bits = explode( '-', $this->mOptions['wiki'] );
 824                         if ( count( $bits ) == 1 ) {
 825                                 $bits[] = '';
 826                         }
 827                         define( 'MW_DB', $bits[0] );
 828                         define( 'MW_PREFIX', $bits[1] );
 829                 }
 830
 831                 if ( !is_readable( $settingsFile ) ) {
 832                         $this->error( "A copy of your installation's LocalSettings.php\n" .
 833                                                 "must exist and be readable in the source directory.", true );
 834                 }
 835                 $wgCommandLineMode = true;
 836                 return $settingsFile;
 837         }
 838
 839         /**
 840          * Support function for cleaning up redundant text records
 841          * @param $delete Boolean: whether or not to actually delete the records
 842          * @author Rob Church <robchur@gmail.com>
 843          */
 844         public function purgeRedundantText( $delete = true ) {
 845                 # Data should come off the master, wrapped in a transaction
 846                 $dbw = wfGetDB( DB_MASTER );
 847                 $dbw->begin();
 848
 849                 $tbl_arc = $dbw->tableName( 'archive' );
 850                 $tbl_rev = $dbw->tableName( 'revision' );
 851                 $tbl_txt = $dbw->tableName( 'text' );
 852
 853                 # Get "active" text records from the revisions table
 854                 $this->output( 'Searching for active text records in revisions table...' );
 855                 $res = $dbw->query( "SELECT DISTINCT rev_text_id FROM $tbl_rev" );
 856                 foreach ( $res as $row ) {
 857                         $cur[] = $row->rev_text_id;
 858                 }
 859                 $this->output( "done.\n" );
 860
 861                 # Get "active" text records from the archive table
 862                 $this->output( 'Searching for active text records in archive table...' );
 863                 $res = $dbw->query( "SELECT DISTINCT ar_text_id FROM $tbl_arc" );
 864                 foreach ( $res as $row ) {
 865                         $cur[] = $row->ar_text_id;
 866                 }
 867                 $this->output( "done.\n" );
 868
 869                 # Get the IDs of all text records not in these sets
 870                 $this->output( 'Searching for inactive text records...' );
 871                 $set = implode( ', ', $cur );
 872                 $res = $dbw->query( "SELECT old_id FROM $tbl_txt WHERE old_id NOT IN ( $set )" );
 873                 $old = array();
 874                 foreach ( $res as $row ) {
 875                         $old[] = $row->old_id;
 876                 }
 877                 $this->output( "done.\n" );
 878
 879                 # Inform the user of what we're going to do
 880                 $count = count( $old );
 881                 $this->output( "$count inactive items found.\n" );
 882
 883                 # Delete as appropriate
 884                 if ( $delete && $count ) {
 885                         $this->output( 'Deleting...' );
 886                         $set = implode( ', ', $old );
 887                         $dbw->query( "DELETE FROM $tbl_txt WHERE old_id IN ( $set )" );
 888                         $this->output( "done.\n" );
 889                 }
 890
 891                 # Done
 892                 $dbw->commit();
 893         }
 894
 895         /**
 896          * Get the maintenance directory.
 897          */
 898         protected function getDir() {
 899                 return dirname( __FILE__ );
 900         }
 901
 902         /**
 903          * Get the list of available maintenance scripts. Note
 904          * that if you call this _before_ calling doMaintenance
 905          * you won't have any extensions in it yet
 906          * @return Array
 907          */
 908         public static function getMaintenanceScripts() {
 909                 global $wgMaintenanceScripts;
 910                 return $wgMaintenanceScripts + self::getCoreScripts();
 911         }
 912
 913         /**
 914          * Return all of the core maintenance scripts
 915          * @return array
 916          */
 917         protected static function getCoreScripts() {
 918                 if ( !self::$mCoreScripts ) {
 919                         self::disableSetup();
 920                         $paths = array(
 921                                 dirname( __FILE__ ),
 922                                 dirname( __FILE__ ) . '/gearman',
 923                                 dirname( __FILE__ ) . '/language',
 924                                 dirname( __FILE__ ) . '/storage',
 925                         );
 926                         self::$mCoreScripts = array();
 927                         foreach ( $paths as $p ) {
 928                                 $handle = opendir( $p );
 929                                 while ( ( $file = readdir( $handle ) ) !== false ) {
 930                                         if ( $file == 'Maintenance.php' ) {
 931                                                 continue;
 932                                         }
 933                                         $file = $p . '/' . $file;
 934                                         if ( is_dir( $file ) || !strpos( $file, '.php' ) ||
 935                                                 ( strpos( file_get_contents( $file ), '$maintClass' ) === false ) ) {
 936                                                 continue;
 937                                         }
 938                                         require( $file );
 939                                         $vars = get_defined_vars();
 940                                         if ( array_key_exists( 'maintClass', $vars ) ) {
 941                                                 self::$mCoreScripts[$vars['maintClass']] = $file;
 942                                         }
 943                                 }
 944                                 closedir( $handle );
 945                         }
 946                 }
 947                 return self::$mCoreScripts;
 948         }
 949
 950         /**
 951          * Lock the search index
 952          * @param &$db Database object
 953          */
 954         private function lockSearchindex( &$db ) {
 955                 $write = array( 'searchindex' );
 956                 $read = array( 'page', 'revision', 'text', 'interwiki', 'l10n_cache' );
 957                 $db->lockTables( $read, $write, __CLASS__ . '::' . __METHOD__ );
 958         }
 959
 960         /**
 961          * Unlock the tables
 962          * @param &$db Database object
 963          */
 964         private function unlockSearchindex( &$db ) {
 965                 $db->unlockTables(  __CLASS__ . '::' . __METHOD__ );
 966         }
 967
 968         /**
 969          * Unlock and lock again
 970          * Since the lock is low-priority, queued reads will be able to complete
 971          * @param &$db Database object
 972          */
 973         private function relockSearchindex( &$db ) {
 974                 $this->unlockSearchindex( $db );
 975                 $this->lockSearchindex( $db );
 976         }
 977
 978         /**
 979          * Perform a search index update with locking
 980          * @param $maxLockTime Integer: the maximum time to keep the search index locked.
 981          * @param $callback callback String: the function that will update the function.
 982          * @param $dbw Database object
 983          * @param $results
 984          */
 985         public function updateSearchIndex( $maxLockTime, $callback, $dbw, $results ) {
 986                 $lockTime = time();
 987
 988                 # Lock searchindex
 989                 if ( $maxLockTime ) {
 990                         $this->output( "   --- Waiting for lock ---" );
 991                         $this->lockSearchindex( $dbw );
 992                         $lockTime = time();
 993                         $this->output( "\n" );
 994                 }
 995
 996                 # Loop through the results and do a search update
 997                 foreach ( $results as $row ) {
 998                         # Allow reads to be processed
 999                         if ( $maxLockTime && time() > $lockTime + $maxLockTime ) {
1000                                 $this->output( "    --- Relocking ---" );
1001                                 $this->relockSearchindex( $dbw );
1002                                 $lockTime = time();
1003                                 $this->output( "\n" );
1004                         }
1005                         call_user_func( $callback, $dbw, $row );
1006                 }
1007
1008                 # Unlock searchindex
1009                 if ( $maxLockTime ) {
1010                         $this->output( "    --- Unlocking --" );
1011                         $this->unlockSearchindex( $dbw );
1012                         $this->output( "\n" );
1013                 }
1014
1015         }
1016
1017         /**
1018          * Update the searchindex table for a given pageid
1019          * @param $dbw Database: a database write handle
1020          * @param $pageId Integer: the page ID to update.
1021          */
1022         public function updateSearchIndexForPage( $dbw, $pageId ) {
1023                 // Get current revision
1024                 $rev = Revision::loadFromPageId( $dbw, $pageId );
1025                 $title = null;
1026                 if ( $rev ) {
1027                         $titleObj = $rev->getTitle();
1028                         $title = $titleObj->getPrefixedDBkey();
1029                         $this->output( "$title..." );
1030                         # Update searchindex
1031                         $u = new SearchUpdate( $pageId, $titleObj->getText(), $rev->getText() );
1032                         $u->doUpdate();
1033                         $this->output( "\n" );
1034                 }
1035                 return $title;
1036         }
1037
1038 }
1039
1040 class FakeMaintenance extends Maintenance {
1041         public function execute() {
1042                 return;
1043         }
1044 }
1045