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