maintenance/Maintenance.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @ingroup Maintenance
  20  * @defgroup Maintenance Maintenance
  21  */
  22
  23 // Define this so scripts can easily find doMaintenance.php
  24 define( 'RUN_MAINTENANCE_IF_MAIN', dirname( __FILE__ ) . '/doMaintenance.php' );
  25 define( 'DO_MAINTENANCE', RUN_MAINTENANCE_IF_MAIN ); // original name, harmless
  26
  27 $maintClass = false;
  28
  29 // Make sure we're on PHP5 or better
  30 if ( version_compare( PHP_VERSION, '5.2.3' ) < 0 ) {
  31         die ( "Sorry! This version of MediaWiki requires PHP 5.2.3; you are running " .
  32                 PHP_VERSION . ".\n\n" .
  33                 "If you are sure you already have PHP 5.2.3 or higher installed, it may be\n" .
  34                 "installed in a different path from PHP " . PHP_VERSION . ". Check with your system\n" .
  35                 "administrator.\n" );
  36 }
  37
  38 // Wrapper for posix_isatty()
  39 if ( !function_exists( 'posix_isatty' ) ) {
  40         # We default as considering stdin a tty (for nice readline methods)
  41         # but treating stout as not a tty to avoid color codes
  42         function posix_isatty( $fd ) {
  43                 return !$fd;
  44         }
  45 }
  46
  47 /**
  48  * Abstract maintenance class for quickly writing and churning out
  49  * maintenance scripts with minimal effort. All that _must_ be defined
  50  * is the execute() method. See docs/maintenance.txt for more info
  51  * and a quick demo of how to use it.
  52  *
  53  * @author Chad Horohoe <chad@anyonecanedit.org>
  54  * @since 1.16
  55  * @ingroup Maintenance
  56  */
  57 abstract class Maintenance {
  58
  59         /**
  60          * Constants for DB access type
  61          * @see Maintenance::getDbType()
  62          */
  63         const DB_NONE  = 0;
  64         const DB_STD   = 1;
  65         const DB_ADMIN = 2;
  66
  67         // Const for getStdin()
  68         const STDIN_ALL = 'all';
  69
  70         // This is the desired params
  71         protected $mParams = array();
  72
  73         // Array of mapping short parameters to long ones
  74         protected $mShortParamsMap = array();
  75
  76         // Array of desired args
  77         protected $mArgList = array();
  78
  79         // This is the list of options that were actually passed
  80         protected $mOptions = array();
  81
  82         // This is the list of arguments that were actually passed
  83         protected $mArgs = array();
  84
  85         // Name of the script currently running
  86         protected $mSelf;
  87
  88         // Special vars for params that are always used
  89         protected $mQuiet = false;
  90         protected $mDbUser, $mDbPass;
  91
  92         // A description of the script, children should change this
  93         protected $mDescription = '';
  94
  95         // Have we already loaded our user input?
  96         protected $mInputLoaded = false;
  97
  98         /**
  99          * Batch size. If a script supports this, they should set
 100          * a default with setBatchSize()
 101          *
 102          * @var int
 103          */
 104         protected $mBatchSize = null;
 105
 106         // Generic options added by addDefaultParams()
 107         private $mGenericParameters = array();
 108         // Generic options which might or not be supported by the script
 109         private $mDependantParameters = array();
 110
 111         // Used by getDD() / setDB()
 112         private $mDb = null;
 113
 114         /**
 115          * List of all the core maintenance scripts. This is added
 116          * to scripts added by extensions in $wgMaintenanceScripts
 117          * and returned by getMaintenanceScripts()
 118          */
 119         protected static $mCoreScripts = null;
 120
 121         /**
 122          * Default constructor. Children should call this *first* if implementing
 123          * their own constructors
 124          */
 125         public function __construct() {
 126                 // Setup $IP, using MW_INSTALL_PATH if it exists
 127                 global $IP;
 128                 $IP = strval( getenv( 'MW_INSTALL_PATH' ) ) !== ''
 129                         ? getenv( 'MW_INSTALL_PATH' )
 130                         : realpath( dirname( __FILE__ ) . '/..' );
 131
 132                 $this->addDefaultParams();
 133                 register_shutdown_function( array( $this, 'outputChanneled' ), false );
 134         }
 135
 136         /**
 137          * Should we execute the maintenance script, or just allow it to be included
 138          * as a standalone class? It checks that the call stack only includes this
 139          * function and a require (meaning was called from the file scope)
 140          *
 141          * @return Boolean
 142          */
 143         public static function shouldExecute() {
 144                 $bt = debug_backtrace();
 145                 if( count( $bt ) !== 2 ) {
 146                         return false;
 147                 }
 148                 return in_array( $bt[1]['function'], array( 'require_once', 'require', 'include' ) ) &&
 149                         $bt[0]['class'] == 'Maintenance' &&
 150                         $bt[0]['function'] == 'shouldExecute';
 151         }
 152
 153         /**
 154          * Do the actual work. All child classes will need to implement this
 155          */
 156         abstract public function execute();
 157
 158         /**
 159          * Add a parameter to the script. Will be displayed on --help
 160          * with the associated description
 161          *
 162          * @param $name String: the name of the param (help, version, etc)
 163          * @param $description String: the description of the param to show on --help
 164          * @param $required Boolean: is the param required?
 165          * @param $withArg Boolean: is an argument required with this option?
 166          * @param $shortName String: character to use as short name
 167          */
 168         protected function addOption( $name, $description, $required = false, $withArg = false, $shortName = false ) {
 169                 $this->mParams[$name] = array( 'desc' => $description, 'require' => $required, 'withArg' => $withArg, 'shortName' => $shortName );
 170                 if ( $shortName !== false ) {
 171                         $this->mShortParamsMap[$shortName] = $name;
 172                 }
 173         }
 174
 175         /**
 176          * Checks to see if a particular param exists.
 177          * @param $name String: the name of the param
 178          * @return Boolean
 179          */
 180         protected function hasOption( $name ) {
 181                 return isset( $this->mOptions[$name] );
 182         }
 183
 184         /**
 185          * Get an option, or return the default
 186          * @param $name String: the name of the param
 187          * @param $default Mixed: anything you want, default null
 188          * @return Mixed
 189          */
 190         protected function getOption( $name, $default = null ) {
 191                 if ( $this->hasOption( $name ) ) {
 192                         return $this->mOptions[$name];
 193                 } else {
 194                         // Set it so we don't have to provide the default again
 195                         $this->mOptions[$name] = $default;
 196                         return $this->mOptions[$name];
 197                 }
 198         }
 199
 200         /**
 201          * Add some args that are needed
 202          * @param $arg String: name of the arg, like 'start'
 203          * @param $description String: short description of the arg
 204          * @param $required Boolean: is this required?
 205          */
 206         protected function addArg( $arg, $description, $required = true ) {
 207                 $this->mArgList[] = array(
 208                         'name' => $arg,
 209                         'desc' => $description,
 210                         'require' => $required
 211                 );
 212         }
 213
 214         /**
 215          * Remove an option.  Useful for removing options that won't be used in your script.
 216          * @param $name String: the option to remove.
 217          */
 218         protected function deleteOption( $name ) {
 219                 unset( $this->mParams[$name] );
 220         }
 221
 222         /**
 223          * Set the description text.
 224          * @param $text String: the text of the description
 225          */
 226         protected function addDescription( $text ) {
 227                 $this->mDescription = $text;
 228         }
 229
 230         /**
 231          * Does a given argument exist?
 232          * @param $argId Integer: the integer value (from zero) for the arg
 233          * @return Boolean
 234          */
 235         protected function hasArg( $argId = 0 ) {
 236                 return isset( $this->mArgs[$argId] );
 237         }
 238
 239         /**
 240          * Get an argument.
 241          * @param $argId Integer: the integer value (from zero) for the arg
 242          * @param $default Mixed: the default if it doesn't exist
 243          * @return mixed
 244          */
 245         protected function getArg( $argId = 0, $default = null ) {
 246                 return $this->hasArg( $argId ) ? $this->mArgs[$argId] : $default;
 247         }
 248
 249         /**
 250          * Set the batch size.
 251          * @param $s Integer: the number of operations to do in a batch
 252          */
 253         protected function setBatchSize( $s = 0 ) {
 254                 $this->mBatchSize = $s;
 255         }
 256
 257         /**
 258          * Get the script's name
 259          * @return String
 260          */
 261         public function getName() {
 262                 return $this->mSelf;
 263         }
 264
 265         /**
 266          * Return input from stdin.
 267          * @param $len Integer: the number of bytes to read. If null,
 268          *        just return the handle. Maintenance::STDIN_ALL returns
 269          *        the full length
 270          * @return Mixed
 271          */
 272         protected function getStdin( $len = null ) {
 273                 if ( $len == Maintenance::STDIN_ALL ) {
 274                         return file_get_contents( 'php://stdin' );
 275                 }
 276                 $f = fopen( 'php://stdin', 'rt' );
 277                 if ( !$len ) {
 278                         return $f;
 279                 }
 280                 $input = fgets( $f, $len );
 281                 fclose( $f );
 282                 return rtrim( $input );
 283         }
 284
 285         public function isQuiet() {
 286                 return $this->mQuiet;
 287         }
 288
 289         /**
 290          * Throw some output to the user. Scripts can call this with no fears,
 291          * as we handle all --quiet stuff here
 292          * @param $out String: the text to show to the user
 293          * @param $channel Mixed: unique identifier for the channel. See
 294          *     function outputChanneled.
 295          */
 296         protected function output( $out, $channel = null ) {
 297                 if ( $this->mQuiet ) {
 298                         return;
 299                 }
 300                 if ( $channel === null ) {
 301                         $this->cleanupChanneled();
 302
 303                         $f = fopen( 'php://stdout', 'w' );
 304                         fwrite( $f, $out );
 305                         fclose( $f );
 306                 }
 307                 else {
 308                         $out = preg_replace( '/\n\z/', '', $out );
 309                         $this->outputChanneled( $out, $channel );
 310                 }
 311         }
 312
 313         /**
 314          * Throw an error to the user. Doesn't respect --quiet, so don't use
 315          * this for non-error output
 316          * @param $err String: the error to display
 317          * @param $die Int: if > 0, go ahead and die out using this int as the code
 318          */
 319         protected function error( $err, $die = 0 ) {
 320                 $this->outputChanneled( false );
 321                 if ( php_sapi_name() == 'cli' ) {
 322                         fwrite( STDERR, $err . "\n" );
 323                 } else {
 324                         $f = fopen( 'php://stderr', 'w' );
 325                         fwrite( $f, $err . "\n" );
 326                         fclose( $f );
 327                 }
 328                 $die = intval( $die );
 329                 if ( $die > 0 ) {
 330                         die( $die );
 331                 }
 332         }
 333
 334         private $atLineStart = true;
 335         private $lastChannel = null;
 336
 337         /**
 338          * Clean up channeled output.  Output a newline if necessary.
 339          */
 340         public function cleanupChanneled() {
 341                 if ( !$this->atLineStart ) {
 342                         $handle = fopen( 'php://stdout', 'w' );
 343                         fwrite( $handle, "\n" );
 344                         fclose( $handle );
 345                         $this->atLineStart = true;
 346                 }
 347         }
 348
 349         /**
 350          * Message outputter with channeled message support. Messages on the
 351          * same channel are concatenated, but any intervening messages in another
 352          * channel start a new line.
 353          * @param $msg String: the message without trailing newline
 354          * @param $channel Channel identifier or null for no
 355          *     channel. Channel comparison uses ===.
 356          */
 357         public function outputChanneled( $msg, $channel = null ) {
 358                 if ( $msg === false ) {
 359                         $this->cleanupChanneled();
 360                         return;
 361                 }
 362
 363                 $handle = fopen( 'php://stdout', 'w' );
 364
 365                 // End the current line if necessary
 366                 if ( !$this->atLineStart && $channel !== $this->lastChannel ) {
 367                         fwrite( $handle, "\n" );
 368                 }
 369
 370                 fwrite( $handle, $msg );
 371
 372                 $this->atLineStart = false;
 373                 if ( $channel === null ) {
 374                         // For unchanneled messages, output trailing newline immediately
 375                         fwrite( $handle, "\n" );
 376                         $this->atLineStart = true;
 377                 }
 378                 $this->lastChannel = $channel;
 379
 380                 // Cleanup handle
 381                 fclose( $handle );
 382         }
 383
 384         /**
 385          * Does the script need different DB access? By default, we give Maintenance
 386          * scripts normal rights to the DB. Sometimes, a script needs admin rights
 387          * access for a reason and sometimes they want no access. Subclasses should
 388          * override and return one of the following values, as needed:
 389          *    Maintenance::DB_NONE  -  For no DB access at all
 390          *    Maintenance::DB_STD   -  For normal DB access, default
 391          *    Maintenance::DB_ADMIN -  For admin DB access
 392          * @return Integer
 393          */
 394         public function getDbType() {
 395                 return Maintenance::DB_STD;
 396         }
 397
 398         /**
 399          * Add the default parameters to the scripts
 400          */
 401         protected function addDefaultParams() {
 402
 403                 # Generic (non script dependant) options:
 404
 405                 $this->addOption( 'help', 'Display this help message', false, false, 'h' );
 406                 $this->addOption( 'quiet', 'Whether to supress non-error output', false, false, 'q' );
 407                 $this->addOption( 'conf', 'Location of LocalSettings.php, if not default', false, true );
 408                 $this->addOption( 'wiki', 'For specifying the wiki ID', false, true );
 409                 $this->addOption( 'globals', 'Output globals at the end of processing for debugging' );
 410                 $this->addOption( 'memory-limit', 'Set a specific memory limit for the script, "max" for no limit or "default" to avoid changing it' );
 411                 $this->addOption( 'server', "The protocol and server name to use in URLs, e.g. " .
 412                                 "http://en.wikipedia.org. This is sometimes necessary because " .
 413                                 "server name detection may fail in command line scripts.", false, true );
 414
 415                 # Save generic options to display them separately in help
 416                 $this->mGenericParameters = $this->mParams ;
 417
 418                 # Script dependant options:
 419
 420                 // If we support a DB, show the options
 421                 if ( $this->getDbType() > 0 ) {
 422                         $this->addOption( 'dbuser', 'The DB user to use for this script', false, true );
 423                         $this->addOption( 'dbpass', 'The password to use for this script', false, true );
 424                 }
 425                 // If we support $mBatchSize, show the option
 426                 if ( $this->mBatchSize ) {
 427                         $this->addOption( 'batch-size', 'Run this many operations ' .
 428                                 'per batch, default: ' . $this->mBatchSize, false, true );
 429                 }
 430                 # Save additional script dependant options to display
 431                 # them separately in help
 432                 $this->mDependantParameters = array_diff_key( $this->mParams, $this->mGenericParameters );
 433         }
 434
 435         /**
 436          * Run a child maintenance script. Pass all of the current arguments
 437          * to it.
 438          * @param $maintClass String: a name of a child maintenance class
 439          * @param $classFile String: full path of where the child is
 440          * @return Maintenance child
 441          */
 442         public function runChild( $maintClass, $classFile = null ) {
 443                 // Make sure the class is loaded first
 444                 if ( !MWInit::classExists( $maintClass ) ) {
 445                         if ( $classFile ) {
 446                                 require_once( $classFile );
 447                         }
 448                         if ( !MWInit::classExists( $maintClass ) ) {
 449                                 $this->error( "Cannot spawn child: $maintClass" );
 450                         }
 451                 }
 452
 453                 $child = new $maintClass();
 454                 $child->loadParamsAndArgs( $this->mSelf, $this->mOptions, $this->mArgs );
 455                 if ( !is_null( $this->mDb ) ) {
 456                         $child->setDB( $this->mDb );
 457                 }
 458                 return $child;
 459         }
 460
 461         /**
 462          * Do some sanity checking and basic setup
 463          */
 464         public function setup() {
 465                 global $wgCommandLineMode, $wgRequestTime;
 466
 467                 # Abort if called from a web server
 468                 if ( isset( $_SERVER ) && isset( $_SERVER['REQUEST_METHOD'] ) ) {
 469                         $this->error( 'This script must be run from the command line', true );
 470                 }
 471
 472                 # Make sure we can handle script parameters
 473                 if ( !function_exists( 'hphp_thread_set_warmup_enabled' ) && !ini_get( 'register_argc_argv' ) ) {
 474                         $this->error( 'Cannot get command line arguments, register_argc_argv is set to false', true );
 475                 }
 476
 477                 if ( version_compare( phpversion(), '5.2.4' ) >= 0 ) {
 478                         // Send PHP warnings and errors to stderr instead of stdout.
 479                         // This aids in diagnosing problems, while keeping messages
 480                         // out of redirected output.
 481                         if ( ini_get( 'display_errors' ) ) {
 482                                 ini_set( 'display_errors', 'stderr' );
 483                         }
 484
 485                         // Don't touch the setting on earlier versions of PHP,
 486                         // as setting it would disable output if you'd wanted it.
 487
 488                         // Note that exceptions are also sent to stderr when
 489                         // command-line mode is on, regardless of PHP version.
 490                 }
 491
 492                 $this->loadParamsAndArgs();
 493                 $this->maybeHelp();
 494
 495                 # Set the memory limit
 496                 # Note we need to set it again later in cache LocalSettings changed it
 497                 $this->adjustMemoryLimit();
 498
 499                 # Set max execution time to 0 (no limit). PHP.net says that
 500                 # "When running PHP from the command line the default setting is 0."
 501                 # But sometimes this doesn't seem to be the case.
 502                 ini_set( 'max_execution_time', 0 );
 503
 504                 $wgRequestTime = microtime( true );
 505
 506                 # Define us as being in MediaWiki
 507                 define( 'MEDIAWIKI', true );
 508
 509                 $wgCommandLineMode = true;
 510                 # Turn off output buffering if it's on
 511                 @ob_end_flush();
 512
 513                 $this->validateParamsAndArgs();
 514         }
 515
 516         /**
 517          * Normally we disable the memory_limit when running admin scripts.
 518          * Some scripts may wish to actually set a limit, however, to avoid
 519          * blowing up unexpectedly. We also support a --memory-limit option,
 520          * to allow sysadmins to explicitly set one if they'd prefer to override
 521          * defaults (or for people using Suhosin which yells at you for trying
 522          * to disable the limits)
 523          */
 524         public function memoryLimit() {
 525                 $limit = $this->getOption( 'memory-limit', 'max' );
 526                 $limit = trim( $limit, "\" '" ); // trim quotes in case someone misunderstood
 527                 return $limit;
 528         }
 529
 530         /**
 531          * Adjusts PHP's memory limit to better suit our needs, if needed.
 532          */
 533         protected function adjustMemoryLimit() {
 534                 $limit = $this->memoryLimit();
 535                 if ( $limit == 'max' ) {
 536                         $limit = -1; // no memory limit
 537                 }
 538                 if ( $limit != 'default' ) {
 539                         ini_set( 'memory_limit', $limit );
 540                 }
 541         }
 542
 543         /**
 544          * Clear all params and arguments.
 545          */
 546         public function clearParamsAndArgs() {
 547                 $this->mOptions = array();
 548                 $this->mArgs = array();
 549                 $this->mInputLoaded = false;
 550         }
 551
 552         /**
 553          * Process command line arguments
 554          * $mOptions becomes an array with keys set to the option names
 555          * $mArgs becomes a zero-based array containing the non-option arguments
 556          *
 557          * @param $self String The name of the script, if any
 558          * @param $opts Array An array of options, in form of key=>value
 559          * @param $args Array An array of command line arguments
 560          */
 561         public function loadParamsAndArgs( $self = null, $opts = null, $args = null ) {
 562                 # If we were given opts or args, set those and return early
 563                 if ( $self ) {
 564                         $this->mSelf = $self;
 565                         $this->mInputLoaded = true;
 566                 }
 567                 if ( $opts ) {
 568                         $this->mOptions = $opts;
 569                         $this->mInputLoaded = true;
 570                 }
 571                 if ( $args ) {
 572                         $this->mArgs = $args;
 573                         $this->mInputLoaded = true;
 574                 }
 575
 576                 # If we've already loaded input (either by user values or from $argv)
 577                 # skip on loading it again. The array_shift() will corrupt values if
 578                 # it's run again and again
 579                 if ( $this->mInputLoaded ) {
 580                         $this->loadSpecialVars();
 581                         return;
 582                 }
 583
 584                 global $argv;
 585                 $this->mSelf = array_shift( $argv );
 586
 587                 $options = array();
 588                 $args = array();
 589
 590                 # Parse arguments
 591                 for ( $arg = reset( $argv ); $arg !== false; $arg = next( $argv ) ) {
 592                         if ( $arg == '--' ) {
 593                                 # End of options, remainder should be considered arguments
 594                                 $arg = next( $argv );
 595                                 while ( $arg !== false ) {
 596                                         $args[] = $arg;
 597                                         $arg = next( $argv );
 598                                 }
 599                                 break;
 600                         } elseif ( substr( $arg, 0, 2 ) == '--' ) {
 601                                 # Long options
 602                                 $option = substr( $arg, 2 );
 603                                 if ( isset( $this->mParams[$option] ) && $this->mParams[$option]['withArg'] ) {
 604                                         $param = next( $argv );
 605                                         if ( $param === false ) {
 606                                                 $this->error( "\nERROR: $option needs a value after it\n" );
 607                                                 $this->maybeHelp( true );
 608                                         }
 609                                         $options[$option] = $param;
 610                                 } else {
 611                                         $bits = explode( '=', $option, 2 );
 612                                         if ( count( $bits ) > 1 ) {
 613                                                 $option = $bits[0];
 614                                                 $param = $bits[1];
 615                                         } else {
 616                                                 $param = 1;
 617                                         }
 618                                         $options[$option] = $param;
 619                                 }
 620                         } elseif ( substr( $arg, 0, 1 ) == '-' ) {
 621                                 # Short options
 622                                 for ( $p = 1; $p < strlen( $arg ); $p++ ) {
 623                                         $option = $arg { $p } ;
 624                                         if ( !isset( $this->mParams[$option] ) && isset( $this->mShortParamsMap[$option] ) ) {
 625                                                 $option = $this->mShortParamsMap[$option];
 626                                         }
 627                                         if ( isset( $this->mParams[$option]['withArg'] ) && $this->mParams[$option]['withArg'] ) {
 628                                                 $param = next( $argv );
 629                                                 if ( $param === false ) {
 630                                                         $this->error( "\nERROR: $option needs a value after it\n" );
 631                                                         $this->maybeHelp( true );
 632                                                 }
 633                                                 $options[$option] = $param;
 634                                         } else {
 635                                                 $options[$option] = 1;
 636                                         }
 637                                 }
 638                         } else {
 639                                 $args[] = $arg;
 640                         }
 641                 }
 642
 643                 $this->mOptions = $options;
 644                 $this->mArgs = $args;
 645                 $this->loadSpecialVars();
 646                 $this->mInputLoaded = true;
 647         }
 648
 649         /**
 650          * Run some validation checks on the params, etc
 651          */
 652         protected function validateParamsAndArgs() {
 653                 $die = false;
 654                 # Check to make sure we've got all the required options
 655                 foreach ( $this->mParams as $opt => $info ) {
 656                         if ( $info['require'] && !$this->hasOption( $opt ) ) {
 657                                 $this->error( "Param $opt required!" );
 658                                 $die = true;
 659                         }
 660                 }
 661                 # Check arg list too
 662                 foreach ( $this->mArgList as $k => $info ) {
 663                         if ( $info['require'] && !$this->hasArg( $k ) ) {
 664                                 $this->error( 'Argument <' . $info['name'] . '> required!' );
 665                                 $die = true;
 666                         }
 667                 }
 668
 669                 if ( $die ) {
 670                         $this->maybeHelp( true );
 671                 }
 672         }
 673
 674         /**
 675          * Handle the special variables that are global to all scripts
 676          */
 677         protected function loadSpecialVars() {
 678                 if ( $this->hasOption( 'dbuser' ) ) {
 679                         $this->mDbUser = $this->getOption( 'dbuser' );
 680                 }
 681                 if ( $this->hasOption( 'dbpass' ) ) {
 682                         $this->mDbPass = $this->getOption( 'dbpass' );
 683                 }
 684                 if ( $this->hasOption( 'quiet' ) ) {
 685                         $this->mQuiet = true;
 686                 }
 687                 if ( $this->hasOption( 'batch-size' ) ) {
 688                         $this->mBatchSize = $this->getOption( 'batch-size' );
 689                 }
 690         }
 691
 692         /**
 693          * Maybe show the help.
 694          * @param $force boolean Whether to force the help to show, default false
 695          */
 696         protected function maybeHelp( $force = false ) {
 697                 if( !$force && !$this->hasOption( 'help' ) ) {
 698                         return;
 699                 }
 700
 701                 $screenWidth = 80; // TODO: Caculate this!
 702                 $tab = "    ";
 703                 $descWidth = $screenWidth - ( 2 * strlen( $tab ) );
 704
 705                 ksort( $this->mParams );
 706                 $this->mQuiet = false;
 707
 708                 // Description ...
 709                 if ( $this->mDescription ) {
 710                         $this->output( "\n" . $this->mDescription . "\n" );
 711                 }
 712                 $output = "\nUsage: php " . basename( $this->mSelf );
 713
 714                 // ... append parameters ...
 715                 if ( $this->mParams ) {
 716                         $output .= " [--" . implode( array_keys( $this->mParams ), "|--" ) . "]";
 717                 }
 718
 719                 // ... and append arguments.
 720                 if ( $this->mArgList ) {
 721                         $output .= ' ';
 722                         foreach ( $this->mArgList as $k => $arg ) {
 723                                 if ( $arg['require'] ) {
 724                                         $output .= '<' . $arg['name'] . '>';
 725                                 } else {
 726                                         $output .= '[' . $arg['name'] . ']';
 727                                 }
 728                                 if ( $k < count( $this->mArgList ) - 1 )
 729                                         $output .= ' ';
 730                         }
 731                 }
 732                 $this->output( "$output\n\n" );
 733
 734                 # TODO abstract some repetitive code below
 735
 736                 // Generic parameters
 737                 $this->output( "Generic maintenance parameters:\n" );
 738                 foreach ( $this->mGenericParameters as $par => $info ) {
 739                         if ( $info['shortName'] !== false ) {
 740                                 $par .= " (-{$info['shortName']})";
 741                         }
 742                         $this->output(
 743                                 wordwrap( "$tab--$par: " . $info['desc'], $descWidth,
 744                                                 "\n$tab$tab" ) . "\n"
 745                         );
 746                 }
 747                 $this->output( "\n" );
 748
 749                 $scriptDependantParams = $this->mDependantParameters;
 750                 if( count($scriptDependantParams) > 0 ) {
 751                         $this->output( "Script dependant parameters:\n" );
 752                         // Parameters description
 753                         foreach ( $scriptDependantParams as $par => $info ) {
 754                                 if ( $info['shortName'] !== false ) {
 755                                         $par .= " (-{$info['shortName']})";
 756                                 }
 757                                 $this->output(
 758                                         wordwrap( "$tab--$par: " . $info['desc'], $descWidth,
 759                                                         "\n$tab$tab" ) . "\n"
 760                                 );
 761                         }
 762                         $this->output( "\n" );
 763                 }
 764
 765
 766                 // Script specific parameters not defined on construction by
 767                 // Maintenance::addDefaultParams()
 768                 $scriptSpecificParams = array_diff_key(
 769                         # all script parameters:
 770                         $this->mParams,
 771                         # remove the Maintenance default parameters:
 772                         $this->mGenericParameters,
 773                         $this->mDependantParameters
 774                 );
 775                 if( count($scriptSpecificParams) > 0 ) {
 776                         $this->output( "Script specific parameters:\n" );
 777                         // Parameters description
 778                         foreach ( $scriptSpecificParams as $par => $info ) {
 779                                 if ( $info['shortName'] !== false ) {
 780                                         $par .= " (-{$info['shortName']})";
 781                                 }
 782                                 $this->output(
 783                                         wordwrap( "$tab--$par: " . $info['desc'], $descWidth,
 784                                                         "\n$tab$tab" ) . "\n"
 785                                 );
 786                         }
 787                         $this->output( "\n" );
 788                 }
 789
 790                 // Print arguments
 791                 if( count( $this->mArgList ) > 0 ) {
 792                         $this->output( "Arguments:\n" );
 793                         // Arguments description
 794                         foreach ( $this->mArgList as $info ) {
 795                                 $openChar = $info['require'] ? '<' : '[';
 796                                 $closeChar = $info['require'] ? '>' : ']';
 797                                 $this->output(
 798                                         wordwrap( "$tab$openChar" . $info['name'] . "$closeChar: " .
 799                                                 $info['desc'], $descWidth, "\n$tab$tab" ) . "\n"
 800                                 );
 801                         }
 802                         $this->output( "\n" );
 803                 }
 804
 805                 die( 1 );
 806         }
 807
 808         /**
 809          * Handle some last-minute setup here.
 810          */
 811         public function finalSetup() {
 812                 global $wgCommandLineMode, $wgShowSQLErrors, $wgServer;
 813                 global $wgDBadminuser, $wgDBadminpassword;
 814                 global $wgDBuser, $wgDBpassword, $wgDBservers, $wgLBFactoryConf;
 815
 816                 # Turn off output buffering again, it might have been turned on in the settings files
 817                 if ( ob_get_level() ) {
 818                         ob_end_flush();
 819                 }
 820                 # Same with these
 821                 $wgCommandLineMode = true;
 822
 823                 # Override $wgServer
 824                 if( $this->hasOption( 'server') ) {
 825                         $wgServer = $this->getOption( 'server', $wgServer );
 826                 }
 827
 828                 # If these were passed, use them
 829                 if ( $this->mDbUser ) {
 830                         $wgDBadminuser = $this->mDbUser;
 831                 }
 832                 if ( $this->mDbPass ) {
 833                         $wgDBadminpassword = $this->mDbPass;
 834                 }
 835
 836                 if ( $this->getDbType() == self::DB_ADMIN && isset( $wgDBadminuser ) ) {
 837                         $wgDBuser = $wgDBadminuser;
 838                         $wgDBpassword = $wgDBadminpassword;
 839
 840                         if ( $wgDBservers ) {
 841                                 foreach ( $wgDBservers as $i => $server ) {
 842                                         $wgDBservers[$i]['user'] = $wgDBuser;
 843                                         $wgDBservers[$i]['password'] = $wgDBpassword;
 844                                 }
 845                         }
 846                         if ( isset( $wgLBFactoryConf['serverTemplate'] ) ) {
 847                                 $wgLBFactoryConf['serverTemplate']['user'] = $wgDBuser;
 848                                 $wgLBFactoryConf['serverTemplate']['password'] = $wgDBpassword;
 849                         }
 850                         LBFactory::destroyInstance();
 851                 }
 852
 853                 $this->afterFinalSetup();
 854
 855                 $wgShowSQLErrors = true;
 856                 @set_time_limit( 0 );
 857                 $this->adjustMemoryLimit();
 858         }
 859
 860         /**
 861          * Execute a callback function at the end of initialisation
 862          */
 863         protected function afterFinalSetup() {
 864                 if ( defined( 'MW_CMDLINE_CALLBACK' ) ) {
 865                         call_user_func( MW_CMDLINE_CALLBACK );
 866                 }
 867         }
 868
 869         /**
 870          * Potentially debug globals. Originally a feature only
 871          * for refreshLinks
 872          */
 873         public function globals() {
 874                 if ( $this->hasOption( 'globals' ) ) {
 875                         print_r( $GLOBALS );
 876                 }
 877         }
 878
 879         /**
 880          * Do setup specific to WMF
 881          */
 882         public function loadWikimediaSettings() {
 883                 global $IP, $wgNoDBParam, $wgUseNormalUser, $wgConf, $site, $lang;
 884
 885                 if ( empty( $wgNoDBParam ) ) {
 886                         # Check if we were passed a db name
 887                         if ( isset( $this->mOptions['wiki'] ) ) {
 888                                 $db = $this->mOptions['wiki'];
 889                         } else {
 890                                 $db = array_shift( $this->mArgs );
 891                         }
 892                         list( $site, $lang ) = $wgConf->siteFromDB( $db );
 893
 894                         # If not, work out the language and site the old way
 895                         if ( is_null( $site ) || is_null( $lang ) ) {
 896                                 if ( !$db ) {
 897                                         $lang = 'aa';
 898                                 } else {
 899                                         $lang = $db;
 900                                 }
 901                                 if ( isset( $this->mArgs[0] ) ) {
 902                                         $site = array_shift( $this->mArgs );
 903                                 } else {
 904                                         $site = 'wikipedia';
 905                                 }
 906                         }
 907                 } else {
 908                         $lang = 'aa';
 909                         $site = 'wikipedia';
 910                 }
 911
 912                 # This is for the IRC scripts, which now run as the apache user
 913                 # The apache user doesn't have access to the wikiadmin_pass command
 914                 if ( $_ENV['USER'] == 'apache' ) {
 915                 # if ( posix_geteuid() == 48 ) {
 916                         $wgUseNormalUser = true;
 917                 }
 918
 919                 putenv( 'wikilang=' . $lang );
 920
 921                 ini_set( 'include_path', ".:$IP:$IP/includes:$IP/languages:$IP/maintenance" );
 922
 923                 if ( $lang == 'test' && $site == 'wikipedia' ) {
 924                         define( 'TESTWIKI', 1 );
 925                 }
 926         }
 927
 928         /**
 929          * Generic setup for most installs. Returns the location of LocalSettings
 930          * @return String
 931          */
 932         public function loadSettings() {
 933                 global $wgCommandLineMode, $IP;
 934
 935                 if ( isset( $this->mOptions['conf'] ) ) {
 936                         $settingsFile = $this->mOptions['conf'];
 937                 } elseif ( defined("MW_CONFIG_FILE") ) {
 938                         $settingsFile = MW_CONFIG_FILE;
 939                 } else {
 940                         $settingsFile = "$IP/LocalSettings.php";
 941                 }
 942                 if ( isset( $this->mOptions['wiki'] ) ) {
 943                         $bits = explode( '-', $this->mOptions['wiki'] );
 944                         if ( count( $bits ) == 1 ) {
 945                                 $bits[] = '';
 946                         }
 947                         define( 'MW_DB', $bits[0] );
 948                         define( 'MW_PREFIX', $bits[1] );
 949                 }
 950
 951                 if ( !is_readable( $settingsFile ) ) {
 952                         $this->error( "A copy of your installation's LocalSettings.php\n" .
 953                                                 "must exist and be readable in the source directory.\n" .
 954                                                 "Use --conf to specify it." , true );
 955                 }
 956                 $wgCommandLineMode = true;
 957                 return $settingsFile;
 958         }
 959
 960         /**
 961          * Support function for cleaning up redundant text records
 962          * @param $delete Boolean: whether or not to actually delete the records
 963          * @author Rob Church <robchur@gmail.com>
 964          */
 965         public function purgeRedundantText( $delete = true ) {
 966                 # Data should come off the master, wrapped in a transaction
 967                 $dbw = $this->getDB( DB_MASTER );
 968                 $dbw->begin();
 969
 970                 $tbl_arc = $dbw->tableName( 'archive' );
 971                 $tbl_rev = $dbw->tableName( 'revision' );
 972                 $tbl_txt = $dbw->tableName( 'text' );
 973
 974                 # Get "active" text records from the revisions table
 975                 $this->output( 'Searching for active text records in revisions table...' );
 976                 $res = $dbw->query( "SELECT DISTINCT rev_text_id FROM $tbl_rev" );
 977                 foreach ( $res as $row ) {
 978                         $cur[] = $row->rev_text_id;
 979                 }
 980                 $this->output( "done.\n" );
 981
 982                 # Get "active" text records from the archive table
 983                 $this->output( 'Searching for active text records in archive table...' );
 984                 $res = $dbw->query( "SELECT DISTINCT ar_text_id FROM $tbl_arc" );
 985                 foreach ( $res as $row ) {
 986                         $cur[] = $row->ar_text_id;
 987                 }
 988                 $this->output( "done.\n" );
 989
 990                 # Get the IDs of all text records not in these sets
 991                 $this->output( 'Searching for inactive text records...' );
 992                 $set = implode( ', ', $cur );
 993                 $res = $dbw->query( "SELECT old_id FROM $tbl_txt WHERE old_id NOT IN ( $set )" );
 994                 $old = array();
 995                 foreach ( $res as $row ) {
 996                         $old[] = $row->old_id;
 997                 }
 998                 $this->output( "done.\n" );
 999
1000                 # Inform the user of what we're going to do
1001                 $count = count( $old );
1002                 $this->output( "$count inactive items found.\n" );
1003
1004                 # Delete as appropriate
1005                 if ( $delete && $count ) {
1006                         $this->output( 'Deleting...' );
1007                         $set = implode( ', ', $old );
1008                         $dbw->query( "DELETE FROM $tbl_txt WHERE old_id IN ( $set )" );
1009                         $this->output( "done.\n" );
1010                 }
1011
1012                 # Done
1013                 $dbw->commit();
1014         }
1015
1016         /**
1017          * Get the maintenance directory.
1018          */
1019         protected function getDir() {
1020                 return dirname( __FILE__ );
1021         }
1022
1023         /**
1024          * Get the list of available maintenance scripts. Note
1025          * that if you call this _before_ calling doMaintenance
1026          * you won't have any extensions in it yet
1027          * @return Array
1028          */
1029         public static function getMaintenanceScripts() {
1030                 global $wgMaintenanceScripts;
1031                 return $wgMaintenanceScripts + self::getCoreScripts();
1032         }
1033
1034         /**
1035          * Return all of the core maintenance scripts
1036          * @return array
1037          */
1038         protected static function getCoreScripts() {
1039                 if ( !self::$mCoreScripts ) {
1040                         $paths = array(
1041                                 dirname( __FILE__ ),
1042                                 dirname( __FILE__ ) . '/gearman',
1043                                 dirname( __FILE__ ) . '/language',
1044                                 dirname( __FILE__ ) . '/storage',
1045                         );
1046                         self::$mCoreScripts = array();
1047                         foreach ( $paths as $p ) {
1048                                 $handle = opendir( $p );
1049                                 while ( ( $file = readdir( $handle ) ) !== false ) {
1050                                         if ( $file == 'Maintenance.php' ) {
1051                                                 continue;
1052                                         }
1053                                         $file = $p . '/' . $file;
1054                                         if ( is_dir( $file ) || !strpos( $file, '.php' ) ||
1055                                                 ( strpos( file_get_contents( $file ), '$maintClass' ) === false ) ) {
1056                                                 continue;
1057                                         }
1058                                         require( $file );
1059                                         $vars = get_defined_vars();
1060                                         if ( array_key_exists( 'maintClass', $vars ) ) {
1061                                                 self::$mCoreScripts[$vars['maintClass']] = $file;
1062                                         }
1063                                 }
1064                                 closedir( $handle );
1065                         }
1066                 }
1067                 return self::$mCoreScripts;
1068         }
1069
1070         /**
1071          * Returns a database to be used by current maintenance script. It can be set by setDB().
1072          * If not set, wfGetDB() will be used.
1073          * This function has the same parameters as wfGetDB()
1074          *
1075          * @return DatabaseBase
1076          */
1077         protected function &getDB( $db, $groups = array(), $wiki = false ) {
1078                 if ( is_null( $this->mDb ) ) {
1079                         return wfGetDB( $db, $groups, $wiki );
1080                 } else {
1081                         return $this->mDb;
1082                 }
1083         }
1084
1085         /**
1086          * Sets database object to be returned by getDB().
1087          *
1088          * @param $db DatabaseBase: Database object to be used
1089          */
1090         public function setDB( &$db ) {
1091                 $this->mDb = $db;
1092         }
1093
1094         /**
1095          * Lock the search index
1096          * @param &$db Database object
1097          */
1098         private function lockSearchindex( &$db ) {
1099                 $write = array( 'searchindex' );
1100                 $read = array( 'page', 'revision', 'text', 'interwiki', 'l10n_cache' );
1101                 $db->lockTables( $read, $write, __CLASS__ . '::' . __METHOD__ );
1102         }
1103
1104         /**
1105          * Unlock the tables
1106          * @param &$db Database object
1107          */
1108         private function unlockSearchindex( &$db ) {
1109                 $db->unlockTables(  __CLASS__ . '::' . __METHOD__ );
1110         }
1111
1112         /**
1113          * Unlock and lock again
1114          * Since the lock is low-priority, queued reads will be able to complete
1115          * @param &$db Database object
1116          */
1117         private function relockSearchindex( &$db ) {
1118                 $this->unlockSearchindex( $db );
1119                 $this->lockSearchindex( $db );
1120         }
1121
1122         /**
1123          * Perform a search index update with locking
1124          * @param $maxLockTime Integer: the maximum time to keep the search index locked.
1125          * @param $callback callback String: the function that will update the function.
1126          * @param $dbw DatabaseBase object
1127          * @param $results
1128          */
1129         public function updateSearchIndex( $maxLockTime, $callback, $dbw, $results ) {
1130                 $lockTime = time();
1131
1132                 # Lock searchindex
1133                 if ( $maxLockTime ) {
1134                         $this->output( "   --- Waiting for lock ---" );
1135                         $this->lockSearchindex( $dbw );
1136                         $lockTime = time();
1137                         $this->output( "\n" );
1138                 }
1139
1140                 # Loop through the results and do a search update
1141                 foreach ( $results as $row ) {
1142                         # Allow reads to be processed
1143                         if ( $maxLockTime && time() > $lockTime + $maxLockTime ) {
1144                                 $this->output( "    --- Relocking ---" );
1145                                 $this->relockSearchindex( $dbw );
1146                                 $lockTime = time();
1147                                 $this->output( "\n" );
1148                         }
1149                         call_user_func( $callback, $dbw, $row );
1150                 }
1151
1152                 # Unlock searchindex
1153                 if ( $maxLockTime ) {
1154                         $this->output( "    --- Unlocking --" );
1155                         $this->unlockSearchindex( $dbw );
1156                         $this->output( "\n" );
1157                 }
1158
1159         }
1160
1161         /**
1162          * Update the searchindex table for a given pageid
1163          * @param $dbw Database: a database write handle
1164          * @param $pageId Integer: the page ID to update.
1165          */
1166         public function updateSearchIndexForPage( $dbw, $pageId ) {
1167                 // Get current revision
1168                 $rev = Revision::loadFromPageId( $dbw, $pageId );
1169                 $title = null;
1170                 if ( $rev ) {
1171                         $titleObj = $rev->getTitle();
1172                         $title = $titleObj->getPrefixedDBkey();
1173                         $this->output( "$title..." );
1174                         # Update searchindex
1175                         $u = new SearchUpdate( $pageId, $titleObj->getText(), $rev->getText() );
1176                         $u->doUpdate();
1177                         $this->output( "\n" );
1178                 }
1179                 return $title;
1180         }
1181
1182         /**
1183          * Prompt the console for input
1184          * @param $prompt String what to begin the line with, like '> '
1185          * @return String response
1186          */
1187         public static function readconsole( $prompt = '> ' ) {
1188                 static $isatty = null;
1189                 if ( is_null( $isatty ) ) {
1190                         $isatty = posix_isatty( 0 /*STDIN*/ );
1191                 }
1192
1193                 if ( $isatty && function_exists( 'readline' ) ) {
1194                         return readline( $prompt );
1195                 } else {
1196                         if ( $isatty ) {
1197                                 $st = self::readlineEmulation( $prompt );
1198                         } else {
1199                                 if ( feof( STDIN ) ) {
1200                                         $st = false;
1201                                 } else {
1202                                         $st = fgets( STDIN, 1024 );
1203                                 }
1204                         }
1205                         if ( $st === false ) return false;
1206                         $resp = trim( $st );
1207                         return $resp;
1208                 }
1209         }
1210
1211         /**
1212          * Emulate readline()
1213          * @param $prompt String what to begin the line with, like '> '
1214          * @return String
1215          */
1216         private static function readlineEmulation( $prompt ) {
1217                 $bash = Installer::locateExecutableInDefaultPaths( array( 'bash' ) );
1218                 if ( !wfIsWindows() && $bash ) {
1219                         $retval = false;
1220                         $encPrompt = wfEscapeShellArg( $prompt );
1221                         $command = "read -er -p $encPrompt && echo \"\$REPLY\"";
1222                         $encCommand = wfEscapeShellArg( $command );
1223                         $line = wfShellExec( "$bash -c $encCommand", $retval );
1224
1225                         if ( $retval == 0 ) {
1226                                 return $line;
1227                         } elseif ( $retval == 127 ) {
1228                                 // Couldn't execute bash even though we thought we saw it.
1229                                 // Shell probably spit out an error message, sorry :(
1230                                 // Fall through to fgets()...
1231                         } else {
1232                                 // EOF/ctrl+D
1233                                 return false;
1234                         }
1235                 }
1236
1237                 // Fallback... we'll have no editing controls, EWWW
1238                 if ( feof( STDIN ) ) {
1239                         return false;
1240                 }
1241                 print $prompt;
1242                 return fgets( STDIN, 1024 );
1243         }
1244 }
1245
1246 class FakeMaintenance extends Maintenance {
1247         protected $mSelf = "FakeMaintenanceScript";
1248         public function execute() {
1249                 return;
1250         }
1251 }
1252