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 // Bail on old versions of PHP, or if composer has not been run yet to install
  24 // dependencies.
  25 require_once __DIR__ . '/../includes/PHPVersionCheck.php';
  26 wfEntryPointCheck( 'cli' );
  27
  28 /**
  29  * @defgroup MaintenanceArchive Maintenance archives
  30  * @ingroup Maintenance
  31  */
  32
  33 // Define this so scripts can easily find doMaintenance.php
  34 define( 'RUN_MAINTENANCE_IF_MAIN', __DIR__ . '/doMaintenance.php' );
  35 define( 'DO_MAINTENANCE', RUN_MAINTENANCE_IF_MAIN ); // original name, harmless
  36
  37 $maintClass = false;
  38
  39 use MediaWiki\Logger\LoggerFactory;
  40 use MediaWiki\MediaWikiServices;
  41
  42 /**
  43  * Abstract maintenance class for quickly writing and churning out
  44  * maintenance scripts with minimal effort. All that _must_ be defined
  45  * is the execute() method. See docs/maintenance.txt for more info
  46  * and a quick demo of how to use it.
  47  *
  48  * @author Chad Horohoe <chad@anyonecanedit.org>
  49  * @since 1.16
  50  * @ingroup Maintenance
  51  */
  52 abstract class Maintenance {
  53         /**
  54          * Constants for DB access type
  55          * @see Maintenance::getDbType()
  56          */
  57         const DB_NONE = 0;
  58         const DB_STD = 1;
  59         const DB_ADMIN = 2;
  60
  61         // Const for getStdin()
  62         const STDIN_ALL = 'all';
  63
  64         // This is the desired params
  65         protected $mParams = [];
  66
  67         // Array of mapping short parameters to long ones
  68         protected $mShortParamsMap = [];
  69
  70         // Array of desired args
  71         protected $mArgList = [];
  72
  73         // This is the list of options that were actually passed
  74         protected $mOptions = [];
  75
  76         // This is the list of arguments that were actually passed
  77         protected $mArgs = [];
  78
  79         // Name of the script currently running
  80         protected $mSelf;
  81
  82         // Special vars for params that are always used
  83         protected $mQuiet = false;
  84         protected $mDbUser, $mDbPass;
  85
  86         // A description of the script, children should change this via addDescription()
  87         protected $mDescription = '';
  88
  89         // Have we already loaded our user input?
  90         protected $mInputLoaded = false;
  91
  92         /**
  93          * Batch size. If a script supports this, they should set
  94          * a default with setBatchSize()
  95          *
  96          * @var int
  97          */
  98         protected $mBatchSize = null;
  99
 100         // Generic options added by addDefaultParams()
 101         private $mGenericParameters = [];
 102         // Generic options which might or not be supported by the script
 103         private $mDependantParameters = [];
 104
 105         /**
 106          * Used by getDB() / setDB()
 107          * @var Database
 108          */
 109         private $mDb = null;
 110
 111         /** @var float UNIX timestamp */
 112         private $lastReplicationWait = 0.0;
 113
 114         /**
 115          * Used when creating separate schema files.
 116          * @var resource
 117          */
 118         public $fileHandle;
 119
 120         /**
 121          * Accessible via getConfig()
 122          *
 123          * @var Config
 124          */
 125         private $config;
 126
 127         /**
 128          * @see Maintenance::requireExtension
 129          * @var array
 130          */
 131         private $requiredExtensions = [];
 132
 133         /**
 134          * Used to read the options in the order they were passed.
 135          * Useful for option chaining (Ex. dumpBackup.php). It will
 136          * be an empty array if the options are passed in through
 137          * loadParamsAndArgs( $self, $opts, $args ).
 138          *
 139          * This is an array of arrays where
 140          * 0 => the option and 1 => parameter value.
 141          *
 142          * @var array
 143          */
 144         public $orderedOptions = [];
 145
 146         /**
 147          * Default constructor. Children should call this *first* if implementing
 148          * their own constructors
 149          */
 150         public function __construct() {
 151                 // Setup $IP, using MW_INSTALL_PATH if it exists
 152                 global $IP;
 153                 $IP = strval( getenv( 'MW_INSTALL_PATH' ) ) !== ''
 154                         ? getenv( 'MW_INSTALL_PATH' )
 155                         : realpath( __DIR__ . '/..' );
 156
 157                 $this->addDefaultParams();
 158                 register_shutdown_function( [ $this, 'outputChanneled' ], false );
 159         }
 160
 161         /**
 162          * Should we execute the maintenance script, or just allow it to be included
 163          * as a standalone class? It checks that the call stack only includes this
 164          * function and "requires" (meaning was called from the file scope)
 165          *
 166          * @return bool
 167          */
 168         public static function shouldExecute() {
 169                 global $wgCommandLineMode;
 170
 171                 if ( !function_exists( 'debug_backtrace' ) ) {
 172                         // If someone has a better idea...
 173                         return $wgCommandLineMode;
 174                 }
 175
 176                 $bt = debug_backtrace();
 177                 $count = count( $bt );
 178                 if ( $count < 2 ) {
 179                         return false; // sanity
 180                 }
 181                 if ( $bt[0]['class'] !== 'Maintenance' || $bt[0]['function'] !== 'shouldExecute' ) {
 182                         return false; // last call should be to this function
 183                 }
 184                 $includeFuncs = [ 'require_once', 'require', 'include', 'include_once' ];
 185                 for ( $i = 1; $i < $count; $i++ ) {
 186                         if ( !in_array( $bt[$i]['function'], $includeFuncs ) ) {
 187                                 return false; // previous calls should all be "requires"
 188                         }
 189                 }
 190
 191                 return true;
 192         }
 193
 194         /**
 195          * Do the actual work. All child classes will need to implement this
 196          */
 197         abstract public function execute();
 198
 199         /**
 200          * Add a parameter to the script. Will be displayed on --help
 201          * with the associated description
 202          *
 203          * @param string $name The name of the param (help, version, etc)
 204          * @param string $description The description of the param to show on --help
 205          * @param bool $required Is the param required?
 206          * @param bool $withArg Is an argument required with this option?
 207          * @param string $shortName Character to use as short name
 208          * @param bool $multiOccurrence Can this option be passed multiple times?
 209          */
 210         protected function addOption( $name, $description, $required = false,
 211                 $withArg = false, $shortName = false, $multiOccurrence = false
 212         ) {
 213                 $this->mParams[$name] = [
 214                         'desc' => $description,
 215                         'require' => $required,
 216                         'withArg' => $withArg,
 217                         'shortName' => $shortName,
 218                         'multiOccurrence' => $multiOccurrence
 219                 ];
 220
 221                 if ( $shortName !== false ) {
 222                         $this->mShortParamsMap[$shortName] = $name;
 223                 }
 224         }
 225
 226         /**
 227          * Checks to see if a particular param exists.
 228          * @param string $name The name of the param
 229          * @return bool
 230          */
 231         protected function hasOption( $name ) {
 232                 return isset( $this->mOptions[$name] );
 233         }
 234
 235         /**
 236          * Get an option, or return the default.
 237          *
 238          * If the option was added to support multiple occurrences,
 239          * this will return an array.
 240          *
 241          * @param string $name The name of the param
 242          * @param mixed $default Anything you want, default null
 243          * @return mixed
 244          */
 245         protected function getOption( $name, $default = null ) {
 246                 if ( $this->hasOption( $name ) ) {
 247                         return $this->mOptions[$name];
 248                 } else {
 249                         // Set it so we don't have to provide the default again
 250                         $this->mOptions[$name] = $default;
 251
 252                         return $this->mOptions[$name];
 253                 }
 254         }
 255
 256         /**
 257          * Add some args that are needed
 258          * @param string $arg Name of the arg, like 'start'
 259          * @param string $description Short description of the arg
 260          * @param bool $required Is this required?
 261          */
 262         protected function addArg( $arg, $description, $required = true ) {
 263                 $this->mArgList[] = [
 264                         'name' => $arg,
 265                         'desc' => $description,
 266                         'require' => $required
 267                 ];
 268         }
 269
 270         /**
 271          * Remove an option.  Useful for removing options that won't be used in your script.
 272          * @param string $name The option to remove.
 273          */
 274         protected function deleteOption( $name ) {
 275                 unset( $this->mParams[$name] );
 276         }
 277
 278         /**
 279          * Set the description text.
 280          * @param string $text The text of the description
 281          */
 282         protected function addDescription( $text ) {
 283                 $this->mDescription = $text;
 284         }
 285
 286         /**
 287          * Does a given argument exist?
 288          * @param int $argId The integer value (from zero) for the arg
 289          * @return bool
 290          */
 291         protected function hasArg( $argId = 0 ) {
 292                 return isset( $this->mArgs[$argId] );
 293         }
 294
 295         /**
 296          * Get an argument.
 297          * @param int $argId The integer value (from zero) for the arg
 298          * @param mixed $default The default if it doesn't exist
 299          * @return mixed
 300          */
 301         protected function getArg( $argId = 0, $default = null ) {
 302                 return $this->hasArg( $argId ) ? $this->mArgs[$argId] : $default;
 303         }
 304
 305         /**
 306          * Set the batch size.
 307          * @param int $s The number of operations to do in a batch
 308          */
 309         protected function setBatchSize( $s = 0 ) {
 310                 $this->mBatchSize = $s;
 311
 312                 // If we support $mBatchSize, show the option.
 313                 // Used to be in addDefaultParams, but in order for that to
 314                 // work, subclasses would have to call this function in the constructor
 315                 // before they called parent::__construct which is just weird
 316                 // (and really wasn't done).
 317                 if ( $this->mBatchSize ) {
 318                         $this->addOption( 'batch-size', 'Run this many operations ' .
 319                                 'per batch, default: ' . $this->mBatchSize, false, true );
 320                         if ( isset( $this->mParams['batch-size'] ) ) {
 321                                 // This seems a little ugly...
 322                                 $this->mDependantParameters['batch-size'] = $this->mParams['batch-size'];
 323                         }
 324                 }
 325         }
 326
 327         /**
 328          * Get the script's name
 329          * @return string
 330          */
 331         public function getName() {
 332                 return $this->mSelf;
 333         }
 334
 335         /**
 336          * Return input from stdin.
 337          * @param int $len The number of bytes to read. If null, just return the handle.
 338          *   Maintenance::STDIN_ALL returns the full length
 339          * @return mixed
 340          */
 341         protected function getStdin( $len = null ) {
 342                 if ( $len == Maintenance::STDIN_ALL ) {
 343                         return file_get_contents( 'php://stdin' );
 344                 }
 345                 $f = fopen( 'php://stdin', 'rt' );
 346                 if ( !$len ) {
 347                         return $f;
 348                 }
 349                 $input = fgets( $f, $len );
 350                 fclose( $f );
 351
 352                 return rtrim( $input );
 353         }
 354
 355         /**
 356          * @return bool
 357          */
 358         public function isQuiet() {
 359                 return $this->mQuiet;
 360         }
 361
 362         /**
 363          * Throw some output to the user. Scripts can call this with no fears,
 364          * as we handle all --quiet stuff here
 365          * @param string $out The text to show to the user
 366          * @param mixed $channel Unique identifier for the channel. See function outputChanneled.
 367          */
 368         protected function output( $out, $channel = null ) {
 369                 if ( $this->mQuiet ) {
 370                         return;
 371                 }
 372                 if ( $channel === null ) {
 373                         $this->cleanupChanneled();
 374                         print $out;
 375                 } else {
 376                         $out = preg_replace( '/\n\z/', '', $out );
 377                         $this->outputChanneled( $out, $channel );
 378                 }
 379         }
 380
 381         /**
 382          * Throw an error to the user. Doesn't respect --quiet, so don't use
 383          * this for non-error output
 384          * @param string $err The error to display
 385          * @param int $die If > 0, go ahead and die out using this int as the code
 386          */
 387         protected function error( $err, $die = 0 ) {
 388                 $this->outputChanneled( false );
 389                 if ( PHP_SAPI == 'cli' ) {
 390                         fwrite( STDERR, $err . "\n" );
 391                 } else {
 392                         print $err;
 393                 }
 394                 $die = intval( $die );
 395                 if ( $die > 0 ) {
 396                         die( $die );
 397                 }
 398         }
 399
 400         private $atLineStart = true;
 401         private $lastChannel = null;
 402
 403         /**
 404          * Clean up channeled output.  Output a newline if necessary.
 405          */
 406         public function cleanupChanneled() {
 407                 if ( !$this->atLineStart ) {
 408                         print "\n";
 409                         $this->atLineStart = true;
 410                 }
 411         }
 412
 413         /**
 414          * Message outputter with channeled message support. Messages on the
 415          * same channel are concatenated, but any intervening messages in another
 416          * channel start a new line.
 417          * @param string $msg The message without trailing newline
 418          * @param string $channel Channel identifier or null for no
 419          *     channel. Channel comparison uses ===.
 420          */
 421         public function outputChanneled( $msg, $channel = null ) {
 422                 if ( $msg === false ) {
 423                         $this->cleanupChanneled();
 424
 425                         return;
 426                 }
 427
 428                 // End the current line if necessary
 429                 if ( !$this->atLineStart && $channel !== $this->lastChannel ) {
 430                         print "\n";
 431                 }
 432
 433                 print $msg;
 434
 435                 $this->atLineStart = false;
 436                 if ( $channel === null ) {
 437                         // For unchanneled messages, output trailing newline immediately
 438                         print "\n";
 439                         $this->atLineStart = true;
 440                 }
 441                 $this->lastChannel = $channel;
 442         }
 443
 444         /**
 445          * Does the script need different DB access? By default, we give Maintenance
 446          * scripts normal rights to the DB. Sometimes, a script needs admin rights
 447          * access for a reason and sometimes they want no access. Subclasses should
 448          * override and return one of the following values, as needed:
 449          *    Maintenance::DB_NONE  -  For no DB access at all
 450          *    Maintenance::DB_STD   -  For normal DB access, default
 451          *    Maintenance::DB_ADMIN -  For admin DB access
 452          * @return int
 453          */
 454         public function getDbType() {
 455                 return Maintenance::DB_STD;
 456         }
 457
 458         /**
 459          * Add the default parameters to the scripts
 460          */
 461         protected function addDefaultParams() {
 462                 # Generic (non script dependant) options:
 463
 464                 $this->addOption( 'help', 'Display this help message', false, false, 'h' );
 465                 $this->addOption( 'quiet', 'Whether to supress non-error output', false, false, 'q' );
 466                 $this->addOption( 'conf', 'Location of LocalSettings.php, if not default', false, true );
 467                 $this->addOption( 'wiki', 'For specifying the wiki ID', false, true );
 468                 $this->addOption( 'globals', 'Output globals at the end of processing for debugging' );
 469                 $this->addOption(
 470                         'memory-limit',
 471                         'Set a specific memory limit for the script, '
 472                                 . '"max" for no limit or "default" to avoid changing it'
 473                 );
 474                 $this->addOption( 'server', "The protocol and server name to use in URLs, e.g. " .
 475                         "http://en.wikipedia.org. This is sometimes necessary because " .
 476                         "server name detection may fail in command line scripts.", false, true );
 477                 $this->addOption( 'profiler', 'Profiler output format (usually "text")', false, true );
 478
 479                 # Save generic options to display them separately in help
 480                 $this->mGenericParameters = $this->mParams;
 481
 482                 # Script dependant options:
 483
 484                 // If we support a DB, show the options
 485                 if ( $this->getDbType() > 0 ) {
 486                         $this->addOption( 'dbuser', 'The DB user to use for this script', false, true );
 487                         $this->addOption( 'dbpass', 'The password to use for this script', false, true );
 488                 }
 489
 490                 # Save additional script dependant options to display
 491                 #  them separately in help
 492                 $this->mDependantParameters = array_diff_key( $this->mParams, $this->mGenericParameters );
 493         }
 494
 495         /**
 496          * @since 1.24
 497          * @return Config
 498          */
 499         public function getConfig() {
 500                 if ( $this->config === null ) {
 501                         $this->config = MediaWikiServices::getInstance()->getMainConfig();
 502                 }
 503
 504                 return $this->config;
 505         }
 506
 507         /**
 508          * @since 1.24
 509          * @param Config $config
 510          */
 511         public function setConfig( Config $config ) {
 512                 $this->config = $config;
 513         }
 514
 515         /**
 516          * Indicate that the specified extension must be
 517          * loaded before the script can run.
 518          *
 519          * This *must* be called in the constructor.
 520          *
 521          * @since 1.28
 522          * @param string $name
 523          */
 524         protected function requireExtension( $name ) {
 525                 $this->requiredExtensions[] = $name;
 526         }
 527
 528         /**
 529          * Verify that the required extensions are installed
 530          *
 531          * @since 1.28
 532          */
 533         public function checkRequiredExtensions() {
 534                 $registry = ExtensionRegistry::getInstance();
 535                 $missing = [];
 536                 foreach ( $this->requiredExtensions as $name ) {
 537                         if ( !$registry->isLoaded( $name ) ) {
 538                                 $missing[] = $name;
 539                         }
 540                 }
 541
 542                 if ( $missing ) {
 543                         $joined = implode( ', ', $missing );
 544                         $msg = "The following extensions are required to be installed "
 545                                 . "for this script to run: $joined. Please enable them and then try again.";
 546                         $this->error( $msg, 1 );
 547                 }
 548         }
 549
 550         /**
 551          * Set triggers like when to try to run deferred updates
 552          * @since 1.28
 553          */
 554         public function setAgentAndTriggers() {
 555                 if ( function_exists( 'posix_getpwuid' ) ) {
 556                         $agent = posix_getpwuid( posix_geteuid() )['name'];
 557                 } else {
 558                         $agent = 'sysadmin';
 559                 }
 560                 $agent .= '@' . wfHostname();
 561
 562                 $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
 563                 // Add a comment for easy SHOW PROCESSLIST interpretation
 564                 $lbFactory->setAgentName(
 565                         mb_strlen( $agent ) > 15 ? mb_substr( $agent, 0, 15 ) . '...' : $agent
 566                 );
 567                 self::setLBFactoryTriggers( $lbFactory );
 568         }
 569
 570         /**
 571          * @param LBFactory $LBFactory
 572          * @since 1.28
 573          */
 574         public static function setLBFactoryTriggers( LBFactory $LBFactory ) {
 575                 // Hook into period lag checks which often happen in long-running scripts
 576                 $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
 577                 $lbFactory->setWaitForReplicationListener(
 578                         __METHOD__,
 579                         function () {
 580                                 global $wgCommandLineMode;
 581                                 // Check config in case of JobRunner and unit tests
 582                                 if ( $wgCommandLineMode ) {
 583                                         DeferredUpdates::tryOpportunisticExecute( 'run' );
 584                                 }
 585                         }
 586                 );
 587                 // Check for other windows to run them. A script may read or do a few writes
 588                 // to the master but mostly be writing to something else, like a file store.
 589                 $lbFactory->getMainLB()->setTransactionListener(
 590                         __METHOD__,
 591                         function ( $trigger ) {
 592                                 global $wgCommandLineMode;
 593                                 // Check config in case of JobRunner and unit tests
 594                                 if ( $wgCommandLineMode && $trigger === IDatabase::TRIGGER_COMMIT ) {
 595                                         DeferredUpdates::tryOpportunisticExecute( 'run' );
 596                                 }
 597                         }
 598                 );
 599         }
 600
 601         /**
 602          * Run a child maintenance script. Pass all of the current arguments
 603          * to it.
 604          * @param string $maintClass A name of a child maintenance class
 605          * @param string $classFile Full path of where the child is
 606          * @return Maintenance
 607          */
 608         public function runChild( $maintClass, $classFile = null ) {
 609                 // Make sure the class is loaded first
 610                 if ( !class_exists( $maintClass ) ) {
 611                         if ( $classFile ) {
 612                                 require_once $classFile;
 613                         }
 614                         if ( !class_exists( $maintClass ) ) {
 615                                 $this->error( "Cannot spawn child: $maintClass" );
 616                         }
 617                 }
 618
 619                 /**
 620                  * @var $child Maintenance
 621                  */
 622                 $child = new $maintClass();
 623                 $child->loadParamsAndArgs( $this->mSelf, $this->mOptions, $this->mArgs );
 624                 if ( !is_null( $this->mDb ) ) {
 625                         $child->setDB( $this->mDb );
 626                 }
 627
 628                 return $child;
 629         }
 630
 631         /**
 632          * Do some sanity checking and basic setup
 633          */
 634         public function setup() {
 635                 global $IP, $wgCommandLineMode, $wgRequestTime;
 636
 637                 # Abort if called from a web server
 638                 if ( isset( $_SERVER ) && isset( $_SERVER['REQUEST_METHOD'] ) ) {
 639                         $this->error( 'This script must be run from the command line', true );
 640                 }
 641
 642                 if ( $IP === null ) {
 643                         $this->error( "\$IP not set, aborting!\n" .
 644                                 '(Did you forget to call parent::__construct() in your maintenance script?)', 1 );
 645                 }
 646
 647                 # Make sure we can handle script parameters
 648                 if ( !defined( 'HPHP_VERSION' ) && !ini_get( 'register_argc_argv' ) ) {
 649                         $this->error( 'Cannot get command line arguments, register_argc_argv is set to false', true );
 650                 }
 651
 652                 // Send PHP warnings and errors to stderr instead of stdout.
 653                 // This aids in diagnosing problems, while keeping messages
 654                 // out of redirected output.
 655                 if ( ini_get( 'display_errors' ) ) {
 656                         ini_set( 'display_errors', 'stderr' );
 657                 }
 658
 659                 $this->loadParamsAndArgs();
 660                 $this->maybeHelp();
 661
 662                 # Set the memory limit
 663                 # Note we need to set it again later in cache LocalSettings changed it
 664                 $this->adjustMemoryLimit();
 665
 666                 # Set max execution time to 0 (no limit). PHP.net says that
 667                 # "When running PHP from the command line the default setting is 0."
 668                 # But sometimes this doesn't seem to be the case.
 669                 ini_set( 'max_execution_time', 0 );
 670
 671                 $wgRequestTime = microtime( true );
 672
 673                 # Define us as being in MediaWiki
 674                 define( 'MEDIAWIKI', true );
 675
 676                 $wgCommandLineMode = true;
 677
 678                 # Turn off output buffering if it's on
 679                 while ( ob_get_level() > 0 ) {
 680                         ob_end_flush();
 681                 }
 682
 683                 $this->validateParamsAndArgs();
 684         }
 685
 686         /**
 687          * Normally we disable the memory_limit when running admin scripts.
 688          * Some scripts may wish to actually set a limit, however, to avoid
 689          * blowing up unexpectedly. We also support a --memory-limit option,
 690          * to allow sysadmins to explicitly set one if they'd prefer to override
 691          * defaults (or for people using Suhosin which yells at you for trying
 692          * to disable the limits)
 693          * @return string
 694          */
 695         public function memoryLimit() {
 696                 $limit = $this->getOption( 'memory-limit', 'max' );
 697                 $limit = trim( $limit, "\" '" ); // trim quotes in case someone misunderstood
 698                 return $limit;
 699         }
 700
 701         /**
 702          * Adjusts PHP's memory limit to better suit our needs, if needed.
 703          */
 704         protected function adjustMemoryLimit() {
 705                 $limit = $this->memoryLimit();
 706                 if ( $limit == 'max' ) {
 707                         $limit = -1; // no memory limit
 708                 }
 709                 if ( $limit != 'default' ) {
 710                         ini_set( 'memory_limit', $limit );
 711                 }
 712         }
 713
 714         /**
 715          * Activate the profiler (assuming $wgProfiler is set)
 716          */
 717         protected function activateProfiler() {
 718                 global $wgProfiler, $wgProfileLimit, $wgTrxProfilerLimits;
 719
 720                 $output = $this->getOption( 'profiler' );
 721                 if ( !$output ) {
 722                         return;
 723                 }
 724
 725                 if ( is_array( $wgProfiler ) && isset( $wgProfiler['class'] ) ) {
 726                         $class = $wgProfiler['class'];
 727                         /** @var Profiler $profiler */
 728                         $profiler = new $class(
 729                                 [ 'sampling' => 1, 'output' => [ $output ] ]
 730                                         + $wgProfiler
 731                                         + [ 'threshold' => $wgProfileLimit ]
 732                         );
 733                         $profiler->setTemplated( true );
 734                         Profiler::replaceStubInstance( $profiler );
 735                 }
 736
 737                 $trxProfiler = Profiler::instance()->getTransactionProfiler();
 738                 $trxProfiler->setLogger( LoggerFactory::getInstance( 'DBPerformance' ) );
 739                 $trxProfiler->setExpectations( $wgTrxProfilerLimits['Maintenance'], __METHOD__ );
 740         }
 741
 742         /**
 743          * Clear all params and arguments.
 744          */
 745         public function clearParamsAndArgs() {
 746                 $this->mOptions = [];
 747                 $this->mArgs = [];
 748                 $this->mInputLoaded = false;
 749         }
 750
 751         /**
 752          * Load params and arguments from a given array
 753          * of command-line arguments
 754          *
 755          * @since 1.27
 756          * @param array $argv
 757          */
 758         public function loadWithArgv( $argv ) {
 759                 $options = [];
 760                 $args = [];
 761                 $this->orderedOptions = [];
 762
 763                 # Parse arguments
 764                 for ( $arg = reset( $argv ); $arg !== false; $arg = next( $argv ) ) {
 765                         if ( $arg == '--' ) {
 766                                 # End of options, remainder should be considered arguments
 767                                 $arg = next( $argv );
 768                                 while ( $arg !== false ) {
 769                                         $args[] = $arg;
 770                                         $arg = next( $argv );
 771                                 }
 772                                 break;
 773                         } elseif ( substr( $arg, 0, 2 ) == '--' ) {
 774                                 # Long options
 775                                 $option = substr( $arg, 2 );
 776                                 if ( isset( $this->mParams[$option] ) && $this->mParams[$option]['withArg'] ) {
 777                                         $param = next( $argv );
 778                                         if ( $param === false ) {
 779                                                 $this->error( "\nERROR: $option parameter needs a value after it\n" );
 780                                                 $this->maybeHelp( true );
 781                                         }
 782
 783                                         $this->setParam( $options, $option, $param );
 784                                 } else {
 785                                         $bits = explode( '=', $option, 2 );
 786                                         if ( count( $bits ) > 1 ) {
 787                                                 $option = $bits[0];
 788                                                 $param = $bits[1];
 789                                         } else {
 790                                                 $param = 1;
 791                                         }
 792
 793                                         $this->setParam( $options, $option, $param );
 794                                 }
 795                         } elseif ( $arg == '-' ) {
 796                                 # Lonely "-", often used to indicate stdin or stdout.
 797                                 $args[] = $arg;
 798                         } elseif ( substr( $arg, 0, 1 ) == '-' ) {
 799                                 # Short options
 800                                 $argLength = strlen( $arg );
 801                                 for ( $p = 1; $p < $argLength; $p++ ) {
 802                                         $option = $arg[$p];
 803                                         if ( !isset( $this->mParams[$option] ) && isset( $this->mShortParamsMap[$option] ) ) {
 804                                                 $option = $this->mShortParamsMap[$option];
 805                                         }
 806
 807                                         if ( isset( $this->mParams[$option]['withArg'] ) && $this->mParams[$option]['withArg'] ) {
 808                                                 $param = next( $argv );
 809                                                 if ( $param === false ) {
 810                                                         $this->error( "\nERROR: $option parameter needs a value after it\n" );
 811                                                         $this->maybeHelp( true );
 812                                                 }
 813                                                 $this->setParam( $options, $option, $param );
 814                                         } else {
 815                                                 $this->setParam( $options, $option, 1 );
 816                                         }
 817                                 }
 818                         } else {
 819                                 $args[] = $arg;
 820                         }
 821                 }
 822
 823                 $this->mOptions = $options;
 824                 $this->mArgs = $args;
 825                 $this->loadSpecialVars();
 826                 $this->mInputLoaded = true;
 827         }
 828
 829         /**
 830          * Helper function used solely by loadParamsAndArgs
 831          * to prevent code duplication
 832          *
 833          * This sets the param in the options array based on
 834          * whether or not it can be specified multiple times.
 835          *
 836          * @since 1.27
 837          * @param array $options
 838          * @param string $option
 839          * @param mixed $value
 840          */
 841         private function setParam( &$options, $option, $value ) {
 842                 $this->orderedOptions[] = [ $option, $value ];
 843
 844                 if ( isset( $this->mParams[$option] ) ) {
 845                         $multi = $this->mParams[$option]['multiOccurrence'];
 846                 } else {
 847                         $multi = false;
 848                 }
 849                 $exists = array_key_exists( $option, $options );
 850                 if ( $multi && $exists ) {
 851                         $options[$option][] = $value;
 852                 } elseif ( $multi ) {
 853                         $options[$option] = [ $value ];
 854                 } elseif ( !$exists ) {
 855                         $options[$option] = $value;
 856                 } else {
 857                         $this->error( "\nERROR: $option parameter given twice\n" );
 858                         $this->maybeHelp( true );
 859                 }
 860         }
 861
 862         /**
 863          * Process command line arguments
 864          * $mOptions becomes an array with keys set to the option names
 865          * $mArgs becomes a zero-based array containing the non-option arguments
 866          *
 867          * @param string $self The name of the script, if any
 868          * @param array $opts An array of options, in form of key=>value
 869          * @param array $args An array of command line arguments
 870          */
 871         public function loadParamsAndArgs( $self = null, $opts = null, $args = null ) {
 872                 # If we were given opts or args, set those and return early
 873                 if ( $self ) {
 874                         $this->mSelf = $self;
 875                         $this->mInputLoaded = true;
 876                 }
 877                 if ( $opts ) {
 878                         $this->mOptions = $opts;
 879                         $this->mInputLoaded = true;
 880                 }
 881                 if ( $args ) {
 882                         $this->mArgs = $args;
 883                         $this->mInputLoaded = true;
 884                 }
 885
 886                 # If we've already loaded input (either by user values or from $argv)
 887                 # skip on loading it again. The array_shift() will corrupt values if
 888                 # it's run again and again
 889                 if ( $this->mInputLoaded ) {
 890                         $this->loadSpecialVars();
 891
 892                         return;
 893                 }
 894
 895                 global $argv;
 896                 $this->mSelf = $argv[0];
 897                 $this->loadWithArgv( array_slice( $argv, 1 ) );
 898         }
 899
 900         /**
 901          * Run some validation checks on the params, etc
 902          */
 903         protected function validateParamsAndArgs() {
 904                 $die = false;
 905                 # Check to make sure we've got all the required options
 906                 foreach ( $this->mParams as $opt => $info ) {
 907                         if ( $info['require'] && !$this->hasOption( $opt ) ) {
 908                                 $this->error( "Param $opt required!" );
 909                                 $die = true;
 910                         }
 911                 }
 912                 # Check arg list too
 913                 foreach ( $this->mArgList as $k => $info ) {
 914                         if ( $info['require'] && !$this->hasArg( $k ) ) {
 915                                 $this->error( 'Argument <' . $info['name'] . '> required!' );
 916                                 $die = true;
 917                         }
 918                 }
 919
 920                 if ( $die ) {
 921                         $this->maybeHelp( true );
 922                 }
 923         }
 924
 925         /**
 926          * Handle the special variables that are global to all scripts
 927          */
 928         protected function loadSpecialVars() {
 929                 if ( $this->hasOption( 'dbuser' ) ) {
 930                         $this->mDbUser = $this->getOption( 'dbuser' );
 931                 }
 932                 if ( $this->hasOption( 'dbpass' ) ) {
 933                         $this->mDbPass = $this->getOption( 'dbpass' );
 934                 }
 935                 if ( $this->hasOption( 'quiet' ) ) {
 936                         $this->mQuiet = true;
 937                 }
 938                 if ( $this->hasOption( 'batch-size' ) ) {
 939                         $this->mBatchSize = intval( $this->getOption( 'batch-size' ) );
 940                 }
 941         }
 942
 943         /**
 944          * Maybe show the help.
 945          * @param bool $force Whether to force the help to show, default false
 946          */
 947         protected function maybeHelp( $force = false ) {
 948                 if ( !$force && !$this->hasOption( 'help' ) ) {
 949                         return;
 950                 }
 951
 952                 $screenWidth = 80; // TODO: Calculate this!
 953                 $tab = "    ";
 954                 $descWidth = $screenWidth - ( 2 * strlen( $tab ) );
 955
 956                 ksort( $this->mParams );
 957                 $this->mQuiet = false;
 958
 959                 // Description ...
 960                 if ( $this->mDescription ) {
 961                         $this->output( "\n" . wordwrap( $this->mDescription, $screenWidth ) . "\n" );
 962                 }
 963                 $output = "\nUsage: php " . basename( $this->mSelf );
 964
 965                 // ... append parameters ...
 966                 if ( $this->mParams ) {
 967                         $output .= " [--" . implode( array_keys( $this->mParams ), "|--" ) . "]";
 968                 }
 969
 970                 // ... and append arguments.
 971                 if ( $this->mArgList ) {
 972                         $output .= ' ';
 973                         foreach ( $this->mArgList as $k => $arg ) {
 974                                 if ( $arg['require'] ) {
 975                                         $output .= '<' . $arg['name'] . '>';
 976                                 } else {
 977                                         $output .= '[' . $arg['name'] . ']';
 978                                 }
 979                                 if ( $k < count( $this->mArgList ) - 1 ) {
 980                                         $output .= ' ';
 981                                 }
 982                         }
 983                 }
 984                 $this->output( "$output\n\n" );
 985
 986                 # TODO abstract some repetitive code below
 987
 988                 // Generic parameters
 989                 $this->output( "Generic maintenance parameters:\n" );
 990                 foreach ( $this->mGenericParameters as $par => $info ) {
 991                         if ( $info['shortName'] !== false ) {
 992                                 $par .= " (-{$info['shortName']})";
 993                         }
 994                         $this->output(
 995                                 wordwrap( "$tab--$par: " . $info['desc'], $descWidth,
 996                                         "\n$tab$tab" ) . "\n"
 997                         );
 998                 }
 999                 $this->output( "\n" );
1000
1001                 $scriptDependantParams = $this->mDependantParameters;
1002                 if ( count( $scriptDependantParams ) > 0 ) {
1003                         $this->output( "Script dependant parameters:\n" );
1004                         // Parameters description
1005                         foreach ( $scriptDependantParams as $par => $info ) {
1006                                 if ( $info['shortName'] !== false ) {
1007                                         $par .= " (-{$info['shortName']})";
1008                                 }
1009                                 $this->output(
1010                                         wordwrap( "$tab--$par: " . $info['desc'], $descWidth,
1011                                                 "\n$tab$tab" ) . "\n"
1012                                 );
1013                         }
1014                         $this->output( "\n" );
1015                 }
1016
1017                 // Script specific parameters not defined on construction by
1018                 // Maintenance::addDefaultParams()
1019                 $scriptSpecificParams = array_diff_key(
1020                         # all script parameters:
1021                         $this->mParams,
1022                         # remove the Maintenance default parameters:
1023                         $this->mGenericParameters,
1024                         $this->mDependantParameters
1025                 );
1026                 if ( count( $scriptSpecificParams ) > 0 ) {
1027                         $this->output( "Script specific parameters:\n" );
1028                         // Parameters description
1029                         foreach ( $scriptSpecificParams as $par => $info ) {
1030                                 if ( $info['shortName'] !== false ) {
1031                                         $par .= " (-{$info['shortName']})";
1032                                 }
1033                                 $this->output(
1034                                         wordwrap( "$tab--$par: " . $info['desc'], $descWidth,
1035                                                 "\n$tab$tab" ) . "\n"
1036                                 );
1037                         }
1038                         $this->output( "\n" );
1039                 }
1040
1041                 // Print arguments
1042                 if ( count( $this->mArgList ) > 0 ) {
1043                         $this->output( "Arguments:\n" );
1044                         // Arguments description
1045                         foreach ( $this->mArgList as $info ) {
1046                                 $openChar = $info['require'] ? '<' : '[';
1047                                 $closeChar = $info['require'] ? '>' : ']';
1048                                 $this->output(
1049                                         wordwrap( "$tab$openChar" . $info['name'] . "$closeChar: " .
1050                                                 $info['desc'], $descWidth, "\n$tab$tab" ) . "\n"
1051                                 );
1052                         }
1053                         $this->output( "\n" );
1054                 }
1055
1056                 die( 1 );
1057         }
1058
1059         /**
1060          * Handle some last-minute setup here.
1061          */
1062         public function finalSetup() {
1063                 global $wgCommandLineMode, $wgShowSQLErrors, $wgServer;
1064                 global $wgDBadminuser, $wgDBadminpassword;
1065                 global $wgDBuser, $wgDBpassword, $wgDBservers, $wgLBFactoryConf;
1066
1067                 # Turn off output buffering again, it might have been turned on in the settings files
1068                 if ( ob_get_level() ) {
1069                         ob_end_flush();
1070                 }
1071                 # Same with these
1072                 $wgCommandLineMode = true;
1073
1074                 # Override $wgServer
1075                 if ( $this->hasOption( 'server' ) ) {
1076                         $wgServer = $this->getOption( 'server', $wgServer );
1077                 }
1078
1079                 # If these were passed, use them
1080                 if ( $this->mDbUser ) {
1081                         $wgDBadminuser = $this->mDbUser;
1082                 }
1083                 if ( $this->mDbPass ) {
1084                         $wgDBadminpassword = $this->mDbPass;
1085                 }
1086
1087                 if ( $this->getDbType() == self::DB_ADMIN && isset( $wgDBadminuser ) ) {
1088                         $wgDBuser = $wgDBadminuser;
1089                         $wgDBpassword = $wgDBadminpassword;
1090
1091                         if ( $wgDBservers ) {
1092                                 /**
1093                                  * @var $wgDBservers array
1094                                  */
1095                                 foreach ( $wgDBservers as $i => $server ) {
1096                                         $wgDBservers[$i]['user'] = $wgDBuser;
1097                                         $wgDBservers[$i]['password'] = $wgDBpassword;
1098                                 }
1099                         }
1100                         if ( isset( $wgLBFactoryConf['serverTemplate'] ) ) {
1101                                 $wgLBFactoryConf['serverTemplate']['user'] = $wgDBuser;
1102                                 $wgLBFactoryConf['serverTemplate']['password'] = $wgDBpassword;
1103                         }
1104                         MediaWikiServices::getInstance()->getDBLoadBalancerFactory()->destroy();
1105                 }
1106
1107                 // Per-script profiling; useful for debugging
1108                 $this->activateProfiler();
1109
1110                 $this->afterFinalSetup();
1111
1112                 $wgShowSQLErrors = true;
1113
1114                 MediaWiki\suppressWarnings();
1115                 set_time_limit( 0 );
1116                 MediaWiki\restoreWarnings();
1117
1118                 $this->adjustMemoryLimit();
1119         }
1120
1121         /**
1122          * Execute a callback function at the end of initialisation
1123          */
1124         protected function afterFinalSetup() {
1125                 if ( defined( 'MW_CMDLINE_CALLBACK' ) ) {
1126                         call_user_func( MW_CMDLINE_CALLBACK );
1127                 }
1128         }
1129
1130         /**
1131          * Potentially debug globals. Originally a feature only
1132          * for refreshLinks
1133          */
1134         public function globals() {
1135                 if ( $this->hasOption( 'globals' ) ) {
1136                         print_r( $GLOBALS );
1137                 }
1138         }
1139
1140         /**
1141          * Generic setup for most installs. Returns the location of LocalSettings
1142          * @return string
1143          */
1144         public function loadSettings() {
1145                 global $wgCommandLineMode, $IP;
1146
1147                 if ( isset( $this->mOptions['conf'] ) ) {
1148                         $settingsFile = $this->mOptions['conf'];
1149                 } elseif ( defined( "MW_CONFIG_FILE" ) ) {
1150                         $settingsFile = MW_CONFIG_FILE;
1151                 } else {
1152                         $settingsFile = "$IP/LocalSettings.php";
1153                 }
1154                 if ( isset( $this->mOptions['wiki'] ) ) {
1155                         $bits = explode( '-', $this->mOptions['wiki'] );
1156                         if ( count( $bits ) == 1 ) {
1157                                 $bits[] = '';
1158                         }
1159                         define( 'MW_DB', $bits[0] );
1160                         define( 'MW_PREFIX', $bits[1] );
1161                 }
1162
1163                 if ( !is_readable( $settingsFile ) ) {
1164                         $this->error( "A copy of your installation's LocalSettings.php\n" .
1165                                 "must exist and be readable in the source directory.\n" .
1166                                 "Use --conf to specify it.", true );
1167                 }
1168                 $wgCommandLineMode = true;
1169
1170                 return $settingsFile;
1171         }
1172
1173         /**
1174          * Support function for cleaning up redundant text records
1175          * @param bool $delete Whether or not to actually delete the records
1176          * @author Rob Church <robchur@gmail.com>
1177          */
1178         public function purgeRedundantText( $delete = true ) {
1179                 # Data should come off the master, wrapped in a transaction
1180                 $dbw = $this->getDB( DB_MASTER );
1181                 $this->beginTransaction( $dbw, __METHOD__ );
1182
1183                 # Get "active" text records from the revisions table
1184                 $cur = [];
1185                 $this->output( 'Searching for active text records in revisions table...' );
1186                 $res = $dbw->select( 'revision', 'rev_text_id', [], __METHOD__, [ 'DISTINCT' ] );
1187                 foreach ( $res as $row ) {
1188                         $cur[] = $row->rev_text_id;
1189                 }
1190                 $this->output( "done.\n" );
1191
1192                 # Get "active" text records from the archive table
1193                 $this->output( 'Searching for active text records in archive table...' );
1194                 $res = $dbw->select( 'archive', 'ar_text_id', [], __METHOD__, [ 'DISTINCT' ] );
1195                 foreach ( $res as $row ) {
1196                         # old pre-MW 1.5 records can have null ar_text_id's.
1197                         if ( $row->ar_text_id !== null ) {
1198                                 $cur[] = $row->ar_text_id;
1199                         }
1200                 }
1201                 $this->output( "done.\n" );
1202
1203                 # Get the IDs of all text records not in these sets
1204                 $this->output( 'Searching for inactive text records...' );
1205                 $cond = 'old_id NOT IN ( ' . $dbw->makeList( $cur ) . ' )';
1206                 $res = $dbw->select( 'text', 'old_id', [ $cond ], __METHOD__, [ 'DISTINCT' ] );
1207                 $old = [];
1208                 foreach ( $res as $row ) {
1209                         $old[] = $row->old_id;
1210                 }
1211                 $this->output( "done.\n" );
1212
1213                 # Inform the user of what we're going to do
1214                 $count = count( $old );
1215                 $this->output( "$count inactive items found.\n" );
1216
1217                 # Delete as appropriate
1218                 if ( $delete && $count ) {
1219                         $this->output( 'Deleting...' );
1220                         $dbw->delete( 'text', [ 'old_id' => $old ], __METHOD__ );
1221                         $this->output( "done.\n" );
1222                 }
1223
1224                 # Done
1225                 $this->commitTransaction( $dbw, __METHOD__ );
1226         }
1227
1228         /**
1229          * Get the maintenance directory.
1230          * @return string
1231          */
1232         protected function getDir() {
1233                 return __DIR__;
1234         }
1235
1236         /**
1237          * Returns a database to be used by current maintenance script. It can be set by setDB().
1238          * If not set, wfGetDB() will be used.
1239          * This function has the same parameters as wfGetDB()
1240          *
1241          * @param integer $db DB index (DB_REPLICA/DB_MASTER)
1242          * @param array $groups; default: empty array
1243          * @param string|bool $wiki; default: current wiki
1244          * @return Database
1245          */
1246         protected function getDB( $db, $groups = [], $wiki = false ) {
1247                 if ( is_null( $this->mDb ) ) {
1248                         return wfGetDB( $db, $groups, $wiki );
1249                 } else {
1250                         return $this->mDb;
1251                 }
1252         }
1253
1254         /**
1255          * Sets database object to be returned by getDB().
1256          *
1257          * @param IDatabase $db Database object to be used
1258          */
1259         public function setDB( IDatabase $db ) {
1260                 $this->mDb = $db;
1261         }
1262
1263         /**
1264          * Begin a transcation on a DB
1265          *
1266          * This method makes it clear that begin() is called from a maintenance script,
1267          * which has outermost scope. This is safe, unlike $dbw->begin() called in other places.
1268          *
1269          * @param IDatabase $dbw
1270          * @param string $fname Caller name
1271          * @since 1.27
1272          */
1273         protected function beginTransaction( IDatabase $dbw, $fname ) {
1274                 $dbw->begin( $fname );
1275         }
1276
1277         /**
1278          * Commit the transcation on a DB handle and wait for replica DBs to catch up
1279          *
1280          * This method makes it clear that commit() is called from a maintenance script,
1281          * which has outermost scope. This is safe, unlike $dbw->commit() called in other places.
1282          *
1283          * @param IDatabase $dbw
1284          * @param string $fname Caller name
1285          * @return bool Whether the replica DB wait succeeded
1286          * @since 1.27
1287          */
1288         protected function commitTransaction( IDatabase $dbw, $fname ) {
1289                 $dbw->commit( $fname );
1290                 try {
1291                         $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
1292                         $lbFactory->waitForReplication(
1293                                 [ 'timeout' => 30, 'ifWritesSince' => $this->lastReplicationWait ]
1294                         );
1295                         $this->lastReplicationWait = microtime( true );
1296
1297                         return true;
1298                 } catch ( DBReplicationWaitError $e ) {
1299                         return false;
1300                 }
1301         }
1302
1303         /**
1304          * Rollback the transcation on a DB handle
1305          *
1306          * This method makes it clear that rollback() is called from a maintenance script,
1307          * which has outermost scope. This is safe, unlike $dbw->rollback() called in other places.
1308          *
1309          * @param IDatabase $dbw
1310          * @param string $fname Caller name
1311          * @since 1.27
1312          */
1313         protected function rollbackTransaction( IDatabase $dbw, $fname ) {
1314                 $dbw->rollback( $fname );
1315         }
1316
1317         /**
1318          * Lock the search index
1319          * @param Database &$db
1320          */
1321         private function lockSearchindex( $db ) {
1322                 $write = [ 'searchindex' ];
1323                 $read = [
1324                         'page',
1325                         'revision',
1326                         'text',
1327                         'interwiki',
1328                         'l10n_cache',
1329                         'user',
1330                         'page_restrictions'
1331                 ];
1332                 $db->lockTables( $read, $write, __CLASS__ . '::' . __METHOD__ );
1333         }
1334
1335         /**
1336          * Unlock the tables
1337          * @param Database &$db
1338          */
1339         private function unlockSearchindex( $db ) {
1340                 $db->unlockTables( __CLASS__ . '::' . __METHOD__ );
1341         }
1342
1343         /**
1344          * Unlock and lock again
1345          * Since the lock is low-priority, queued reads will be able to complete
1346          * @param Database &$db
1347          */
1348         private function relockSearchindex( $db ) {
1349                 $this->unlockSearchindex( $db );
1350                 $this->lockSearchindex( $db );
1351         }
1352
1353         /**
1354          * Perform a search index update with locking
1355          * @param int $maxLockTime The maximum time to keep the search index locked.
1356          * @param string $callback The function that will update the function.
1357          * @param Database $dbw
1358          * @param array $results
1359          */
1360         public function updateSearchIndex( $maxLockTime, $callback, $dbw, $results ) {
1361                 $lockTime = time();
1362
1363                 # Lock searchindex
1364                 if ( $maxLockTime ) {
1365                         $this->output( "   --- Waiting for lock ---" );
1366                         $this->lockSearchindex( $dbw );
1367                         $lockTime = time();
1368                         $this->output( "\n" );
1369                 }
1370
1371                 # Loop through the results and do a search update
1372                 foreach ( $results as $row ) {
1373                         # Allow reads to be processed
1374                         if ( $maxLockTime && time() > $lockTime + $maxLockTime ) {
1375                                 $this->output( "    --- Relocking ---" );
1376                                 $this->relockSearchindex( $dbw );
1377                                 $lockTime = time();
1378                                 $this->output( "\n" );
1379                         }
1380                         call_user_func( $callback, $dbw, $row );
1381                 }
1382
1383                 # Unlock searchindex
1384                 if ( $maxLockTime ) {
1385                         $this->output( "    --- Unlocking --" );
1386                         $this->unlockSearchindex( $dbw );
1387                         $this->output( "\n" );
1388                 }
1389         }
1390
1391         /**
1392          * Update the searchindex table for a given pageid
1393          * @param Database $dbw A database write handle
1394          * @param int $pageId The page ID to update.
1395          * @return null|string
1396          */
1397         public function updateSearchIndexForPage( $dbw, $pageId ) {
1398                 // Get current revision
1399                 $rev = Revision::loadFromPageId( $dbw, $pageId );
1400                 $title = null;
1401                 if ( $rev ) {
1402                         $titleObj = $rev->getTitle();
1403                         $title = $titleObj->getPrefixedDBkey();
1404                         $this->output( "$title..." );
1405                         # Update searchindex
1406                         $u = new SearchUpdate( $pageId, $titleObj->getText(), $rev->getContent() );
1407                         $u->doUpdate();
1408                         $this->output( "\n" );
1409                 }
1410
1411                 return $title;
1412         }
1413
1414         /**
1415          * Wrapper for posix_isatty()
1416          * We default as considering stdin a tty (for nice readline methods)
1417          * but treating stout as not a tty to avoid color codes
1418          *
1419          * @param mixed $fd File descriptor
1420          * @return bool
1421          */
1422         public static function posix_isatty( $fd ) {
1423                 if ( !function_exists( 'posix_isatty' ) ) {
1424                         return !$fd;
1425                 } else {
1426                         return posix_isatty( $fd );
1427                 }
1428         }
1429
1430         /**
1431          * Prompt the console for input
1432          * @param string $prompt What to begin the line with, like '> '
1433          * @return string Response
1434          */
1435         public static function readconsole( $prompt = '> ' ) {
1436                 static $isatty = null;
1437                 if ( is_null( $isatty ) ) {
1438                         $isatty = self::posix_isatty( 0 /*STDIN*/ );
1439                 }
1440
1441                 if ( $isatty && function_exists( 'readline' ) ) {
1442                         $resp = readline( $prompt );
1443                         if ( $resp === null ) {
1444                                 // Workaround for https://github.com/facebook/hhvm/issues/4776
1445                                 return false;
1446                         } else {
1447                                 return $resp;
1448                         }
1449                 } else {
1450                         if ( $isatty ) {
1451                                 $st = self::readlineEmulation( $prompt );
1452                         } else {
1453                                 if ( feof( STDIN ) ) {
1454                                         $st = false;
1455                                 } else {
1456                                         $st = fgets( STDIN, 1024 );
1457                                 }
1458                         }
1459                         if ( $st === false ) {
1460                                 return false;
1461                         }
1462                         $resp = trim( $st );
1463
1464                         return $resp;
1465                 }
1466         }
1467
1468         /**
1469          * Emulate readline()
1470          * @param string $prompt What to begin the line with, like '> '
1471          * @return string
1472          */
1473         private static function readlineEmulation( $prompt ) {
1474                 $bash = Installer::locateExecutableInDefaultPaths( [ 'bash' ] );
1475                 if ( !wfIsWindows() && $bash ) {
1476                         $retval = false;
1477                         $encPrompt = wfEscapeShellArg( $prompt );
1478                         $command = "read -er -p $encPrompt && echo \"\$REPLY\"";
1479                         $encCommand = wfEscapeShellArg( $command );
1480                         $line = wfShellExec( "$bash -c $encCommand", $retval, [], [ 'walltime' => 0 ] );
1481
1482                         if ( $retval == 0 ) {
1483                                 return $line;
1484                         } elseif ( $retval == 127 ) {
1485                                 // Couldn't execute bash even though we thought we saw it.
1486                                 // Shell probably spit out an error message, sorry :(
1487                                 // Fall through to fgets()...
1488                         } else {
1489                                 // EOF/ctrl+D
1490                                 return false;
1491                         }
1492                 }
1493
1494                 // Fallback... we'll have no editing controls, EWWW
1495                 if ( feof( STDIN ) ) {
1496                         return false;
1497                 }
1498                 print $prompt;
1499
1500                 return fgets( STDIN, 1024 );
1501         }
1502
1503         /**
1504          * Get the terminal size as a two-element array where the first element
1505          * is the width (number of columns) and the second element is the height
1506          * (number of rows).
1507          *
1508          * @return array
1509          */
1510         public static function getTermSize() {
1511                 $default = [ 80, 50 ];
1512                 if ( wfIsWindows() ) {
1513                         return $default;
1514                 }
1515                 // It's possible to get the screen size with VT-100 terminal escapes,
1516                 // but reading the responses is not possible without setting raw mode
1517                 // (unless you want to require the user to press enter), and that
1518                 // requires an ioctl(), which we can't do. So we have to shell out to
1519                 // something that can do the relevant syscalls. There are a few
1520                 // options. Linux and Mac OS X both have "stty size" which does the
1521                 // job directly.
1522                 $retval = false;
1523                 $size = wfShellExec( 'stty size', $retval );
1524                 if ( $retval !== 0 ) {
1525                         return $default;
1526                 }
1527                 if ( !preg_match( '/^(\d+) (\d+)$/', $size, $m ) ) {
1528                         return $default;
1529                 }
1530                 return [ intval( $m[2] ), intval( $m[1] ) ];
1531         }
1532
1533         /**
1534          * Call this to set up the autoloader to allow classes to be used from the
1535          * tests directory.
1536          */
1537         public static function requireTestsAutoloader() {
1538                 require_once __DIR__ . '/../tests/common/TestsAutoLoader.php';
1539         }
1540 }
1541
1542 /**
1543  * Fake maintenance wrapper, mostly used for the web installer/updater
1544  */
1545 class FakeMaintenance extends Maintenance {
1546         protected $mSelf = "FakeMaintenanceScript";
1547
1548         public function execute() {
1549                 return;
1550         }
1551 }
1552
1553 /**
1554  * Class for scripts that perform database maintenance and want to log the
1555  * update in `updatelog` so we can later skip it
1556  */
1557 abstract class LoggedUpdateMaintenance extends Maintenance {
1558         public function __construct() {
1559                 parent::__construct();
1560                 $this->addOption( 'force', 'Run the update even if it was completed already' );
1561                 $this->setBatchSize( 200 );
1562         }
1563
1564         public function execute() {
1565                 $db = $this->getDB( DB_MASTER );
1566                 $key = $this->getUpdateKey();
1567
1568                 if ( !$this->hasOption( 'force' )
1569                         && $db->selectRow( 'updatelog', '1', [ 'ul_key' => $key ], __METHOD__ )
1570                 ) {
1571                         $this->output( "..." . $this->updateSkippedMessage() . "\n" );
1572
1573                         return true;
1574                 }
1575
1576                 if ( !$this->doDBUpdates() ) {
1577                         return false;
1578                 }
1579
1580                 if ( $db->insert( 'updatelog', [ 'ul_key' => $key ], __METHOD__, 'IGNORE' ) ) {
1581                         return true;
1582                 } else {
1583                         $this->output( $this->updatelogFailedMessage() . "\n" );
1584
1585                         return false;
1586                 }
1587         }
1588
1589         /**
1590          * Message to show that the update was done already and was just skipped
1591          * @return string
1592          */
1593         protected function updateSkippedMessage() {
1594                 $key = $this->getUpdateKey();
1595
1596                 return "Update '{$key}' already logged as completed.";
1597         }
1598
1599         /**
1600          * Message to show that the update log was unable to log the completion of this update
1601          * @return string
1602          */
1603         protected function updatelogFailedMessage() {
1604                 $key = $this->getUpdateKey();
1605
1606                 return "Unable to log update '{$key}' as completed.";
1607         }
1608
1609         /**
1610          * Do the actual work. All child classes will need to implement this.
1611          * Return true to log the update as done or false (usually on failure).
1612          * @return bool
1613          */
1614         abstract protected function doDBUpdates();
1615
1616         /**
1617          * Get the update key name to go in the update log table
1618          * @return string
1619          */
1620         abstract protected function getUpdateKey();
1621 }