--- /dev/null
+<?php
+/**
+ * Fills the rev_sha1 and ar_sha1 columns of revision
+ * and archive tables for revisions created before MW 1.19.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Maintenance
+ */
+
+require_once __DIR__ . '/Maintenance.php';
+
+/**
+ * Maintenance script that fills the rev_sha1 and ar_sha1 columns of revision
+ * and archive tables for revisions created before MW 1.19.
+ *
+ * @ingroup Maintenance
+ */
+class PopulateRevisionSha1 extends LoggedUpdateMaintenance {
+ public function __construct() {
+ parent::__construct();
+ $this->addDescription( 'Populates the rev_sha1 and ar_sha1 fields' );
+ $this->setBatchSize( 200 );
+ }
+
+ protected function getUpdateKey() {
+ return 'populate rev_sha1';
+ }
+
+ protected function doDBUpdates() {
+ $db = $this->getDB( DB_MASTER );
+
+ if ( !$db->tableExists( 'revision' ) ) {
+ $this->error( "revision table does not exist", true );
+ } elseif ( !$db->tableExists( 'archive' ) ) {
+ $this->error( "archive table does not exist", true );
+ } elseif ( !$db->fieldExists( 'revision', 'rev_sha1', __METHOD__ ) ) {
+ $this->output( "rev_sha1 column does not exist\n\n", true );
+
+ return false;
+ }
+
+ $this->output( "Populating rev_sha1 column\n" );
+ $rc = $this->doSha1Updates( 'revision', 'rev_id', 'rev' );
+
+ $this->output( "Populating ar_sha1 column\n" );
+ $ac = $this->doSha1Updates( 'archive', 'ar_rev_id', 'ar' );
+ $this->output( "Populating ar_sha1 column legacy rows\n" );
+ $ac += $this->doSha1LegacyUpdates();
+
+ $this->output( "rev_sha1 and ar_sha1 population complete "
+ . "[$rc revision rows, $ac archive rows].\n" );
+
+ return true;
+ }
+
+ /**
+ * @param string $table
+ * @param string $idCol
+ * @param string $prefix
+ * @return int Rows changed
+ */
+ protected function doSha1Updates( $table, $idCol, $prefix ) {
+ $db = $this->getDB( DB_MASTER );
+ $start = $db->selectField( $table, "MIN($idCol)", false, __METHOD__ );
+ $end = $db->selectField( $table, "MAX($idCol)", false, __METHOD__ );
+ if ( !$start || !$end ) {
+ $this->output( "...$table table seems to be empty.\n" );
+
+ return 0;
+ }
+
+ $count = 0;
+ # Do remaining chunk
+ $end += $this->mBatchSize - 1;
+ $blockStart = $start;
+ $blockEnd = $start + $this->mBatchSize - 1;
+ while ( $blockEnd <= $end ) {
+ $this->output( "...doing $idCol from $blockStart to $blockEnd\n" );
+ $cond = "$idCol BETWEEN $blockStart AND $blockEnd
+ AND $idCol IS NOT NULL AND {$prefix}_sha1 = ''";
+ $res = $db->select( $table, '*', $cond, __METHOD__ );
+
+ $this->beginTransaction( $db, __METHOD__ );
+ foreach ( $res as $row ) {
+ if ( $this->upgradeRow( $row, $table, $idCol, $prefix ) ) {
+ $count++;
+ }
+ }
+ $this->commitTransaction( $db, __METHOD__ );
+
+ $blockStart += $this->mBatchSize;
+ $blockEnd += $this->mBatchSize;
+ wfWaitForSlaves();
+ }
+
+ return $count;
+ }
+
+ /**
+ * @return int
+ */
+ protected function doSha1LegacyUpdates() {
+ $count = 0;
+ $db = $this->getDB( DB_MASTER );
+ $res = $db->select( 'archive', '*',
+ [ 'ar_rev_id IS NULL', 'ar_sha1' => '' ], __METHOD__ );
+
+ $updateSize = 0;
+ $this->beginTransaction( $db, __METHOD__ );
+ foreach ( $res as $row ) {
+ if ( $this->upgradeLegacyArchiveRow( $row ) ) {
+ ++$count;
+ }
+ if ( ++$updateSize >= 100 ) {
+ $updateSize = 0;
+ $this->commitTransaction( $db, __METHOD__ );
+ $this->output( "Commited row with ar_timestamp={$row->ar_timestamp}\n" );
+ wfWaitForSlaves();
+ $this->beginTransaction( $db, __METHOD__ );
+ }
+ }
+ $this->commitTransaction( $db, __METHOD__ );
+
+ return $count;
+ }
+
+ /**
+ * @param stdClass $row
+ * @param string $table
+ * @param string $idCol
+ * @param string $prefix
+ * @return bool
+ */
+ protected function upgradeRow( $row, $table, $idCol, $prefix ) {
+ $db = $this->getDB( DB_MASTER );
+ try {
+ $rev = ( $table === 'archive' )
+ ? Revision::newFromArchiveRow( $row )
+ : new Revision( $row );
+ $text = $rev->getSerializedData();
+ } catch ( Exception $e ) {
+ $this->output( "Data of revision with {$idCol}={$row->$idCol} unavailable!\n" );
+
+ return false; // T24624?
+ }
+ if ( !is_string( $text ) ) {
+ # This should not happen, but sometimes does (T22757)
+ $this->output( "Data of revision with {$idCol}={$row->$idCol} unavailable!\n" );
+
+ return false;
+ } else {
+ $db->update( $table,
+ [ "{$prefix}_sha1" => Revision::base36Sha1( $text ) ],
+ [ $idCol => $row->$idCol ],
+ __METHOD__
+ );
+
+ return true;
+ }
+ }
+
+ /**
+ * @param stdClass $row
+ * @return bool
+ */
+ protected function upgradeLegacyArchiveRow( $row ) {
+ $db = $this->getDB( DB_MASTER );
+ try {
+ $rev = Revision::newFromArchiveRow( $row );
+ } catch ( Exception $e ) {
+ $this->output( "Text of revision with timestamp {$row->ar_timestamp} unavailable!\n" );
+
+ return false; // T24624?
+ }
+ $text = $rev->getSerializedData();
+ if ( !is_string( $text ) ) {
+ # This should not happen, but sometimes does (T22757)
+ $this->output( "Data of revision with timestamp {$row->ar_timestamp} unavailable!\n" );
+
+ return false;
+ } else {
+ # Archive table as no PK, but (NS,title,time) should be near unique.
+ # Any duplicates on those should also have duplicated text anyway.
+ $db->update( 'archive',
+ [ 'ar_sha1' => Revision::base36Sha1( $text ) ],
+ [
+ 'ar_namespace' => $row->ar_namespace,
+ 'ar_title' => $row->ar_title,
+ 'ar_timestamp' => $row->ar_timestamp,
+ 'ar_len' => $row->ar_len // extra sanity
+ ],
+ __METHOD__
+ );
+
+ return true;
+ }
+ }
+}
+
+$maintClass = "PopulateRevisionSha1";
+require_once RUN_MAINTENANCE_IF_MAIN;
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff