--- /dev/null
+<?php
+/**
+ * Migrate archive.ar_text and ar_flags to modern storage
+ *
+ * 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 migrates archive.ar_text and ar_flags to modern storage
+ *
+ * @ingroup Maintenance
+ * @since 1.31
+ */
+class MigrateArchiveText extends LoggedUpdateMaintenance {
+ public function __construct() {
+ parent::__construct();
+ $this->addDescription(
+ 'Migrates comments from pre-1.5 ar_text and ar_flags columns to modern storage'
+ );
+ $this->addOption(
+ 'replace-missing',
+ "For rows with missing or unloadable data, throw away whatever is there and\n"
+ . "mark them as \"error\" in the database."
+ );
+ }
+
+ /**
+ * Sets whether a run of this maintenance script has the force parameter set
+ * @param bool $forced
+ */
+ public function setForce( $forced = true ) {
+ $this->mOptions['force'] = $forced;
+ }
+
+ protected function getUpdateKey() {
+ return __CLASS__;
+ }
+
+ protected function doDBUpdates() {
+ global $wgDefaultExternalStore;
+
+ $replaceMissing = $this->hasOption( 'replace-missing' );
+ $batchSize = $this->getBatchSize();
+
+ $dbr = $this->getDB( DB_REPLICA, [ 'vslow' ] );
+ $dbw = $this->getDB( DB_MASTER );
+ if ( !$dbr->fieldExists( 'archive', 'ar_text', __METHOD__ ) ||
+ !$dbw->fieldExists( 'archive', 'ar_text', __METHOD__ )
+ ) {
+ $this->output( "No ar_text field, so nothing to migrate.\n" );
+ return true;
+ }
+
+ $this->output( "Migrating ar_text to modern storage...\n" );
+ $last = 0;
+ $count = 0;
+ $errors = 0;
+ while ( true ) {
+ $res = $dbr->select(
+ 'archive',
+ [ 'ar_id', 'ar_text', 'ar_flags' ],
+ [
+ 'ar_text_id' => null,
+ "ar_id > $last",
+ ],
+ __METHOD__,
+ [ 'LIMIT' => $batchSize, 'ORDER BY' => [ 'ar_id' ] ]
+ );
+ $numRows = $res->numRows();
+
+ foreach ( $res as $row ) {
+ $last = $row->ar_id;
+
+ // Recompress the text (and store in external storage, if
+ // applicable) if it's not already in external storage.
+ if ( !in_array( 'external', explode( ',', $row->ar_flags ), true ) ) {
+ $data = Revision::getRevisionText( $row, 'ar_' );
+ if ( $data !== false ) {
+ $flags = Revision::compressRevisionText( $data );
+
+ if ( $wgDefaultExternalStore ) {
+ $data = ExternalStore::insertToDefault( $data );
+ if ( !$data ) {
+ throw new MWException( "Unable to store text to external storage" );
+ }
+ if ( $flags ) {
+ $flags .= ',';
+ }
+ $flags .= 'external';
+ }
+ } elseif ( $replaceMissing ) {
+ $this->error( "Replacing missing data for row ar_id=$row->ar_id" );
+ $data = 'Missing data in migrateArchiveText.php on ' . date( 'c' );
+ $flags = 'error';
+ } else {
+ $this->error( "No data for row ar_id=$row->ar_id" );
+ $errors++;
+ continue;
+ }
+ } else {
+ $flags = $row->ar_flags;
+ $data = $row->ar_text;
+ }
+
+ $this->beginTransaction( $dbw, __METHOD__ );
+ $dbw->insert(
+ 'text',
+ [ 'old_text' => $data, 'old_flags' => $flags ],
+ __METHOD__
+ );
+ $id = $dbw->insertId();
+ $dbw->update(
+ 'archive',
+ [ 'ar_text_id' => $id, 'ar_text' => '', 'ar_flags' => '' ],
+ [ 'ar_id' => $row->ar_id, 'ar_text_id' => null ],
+ __METHOD__
+ );
+ $count += $dbw->affectedRows();
+ $this->commitTransaction( $dbw, __METHOD__ );
+ }
+
+ if ( $numRows < $batchSize ) {
+ // We must have reached the end
+ break;
+ }
+
+ $this->output( "... $last\n" );
+ // $this->commitTransaction() already waited for slaves, no need to re-wait here.
+ }
+
+ $this->output( "Completed ar_text migration, $count rows updated, $errors missing data.\n" );
+ if ( $errors ) {
+ $this->output( "Run with --replace-missing to overwrite missing data with an error message.\n" );
+ }
+
+ return $errors === 0;
+ }
+}
+
+$maintClass = "MigrateArchiveText";
+require_once RUN_MAINTENANCE_IF_MAIN;
dépôts / lhc / web / wiklou.git / commitdiff