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https://github.com/YunoHost-Apps/mediawiki_ynh.git
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140 lines
4.3 KiB
PHP
140 lines
4.3 KiB
PHP
<?php
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/**
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* Performs some operations specific to SQLite database backend.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Maintenance
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*/
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require_once __DIR__ . '/Maintenance.php';
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/**
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* Maintenance script that performs some operations specific to SQLite database backend.
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*
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* @ingroup Maintenance
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*/
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class SqliteMaintenance extends Maintenance {
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public function __construct() {
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parent::__construct();
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$this->mDescription = "Performs some operations specific to SQLite database backend";
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$this->addOption( 'vacuum', 'Clean up database by removing deleted pages. Decreases database file size' );
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$this->addOption( 'integrity', 'Check database for integrity' );
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$this->addOption( 'backup-to', 'Backup database to the given file', false, true );
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$this->addOption( 'check-syntax', 'Check SQL file(s) for syntax errors', false, true );
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}
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/**
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* While we use database connection, this simple lie prevents useless --dbpass and
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* --dbuser options from appearing in help message for this script.
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*
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* @return int DB constant
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*/
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public function getDbType() {
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return Maintenance::DB_NONE;
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}
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public function execute() {
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// Should work even if we use a non-SQLite database
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if ( $this->hasOption( 'check-syntax' ) ) {
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$this->checkSyntax();
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return;
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}
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$this->db = wfGetDB( DB_MASTER );
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if ( $this->db->getType() != 'sqlite' ) {
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$this->error( "This maintenance script requires a SQLite database.\n" );
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return;
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}
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if ( $this->hasOption( 'vacuum' ) ) {
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$this->vacuum();
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}
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if ( $this->hasOption( 'integrity' ) ) {
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$this->integrityCheck();
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}
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if ( $this->hasOption( 'backup-to' ) ) {
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$this->backup( $this->getOption( 'backup-to' ) );
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}
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}
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private function vacuum() {
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$prevSize = filesize( $this->db->mDatabaseFile );
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if ( $prevSize == 0 ) {
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$this->error( "Can't vacuum an empty database.\n", true );
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}
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$this->output( 'VACUUM: ' );
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if ( $this->db->query( 'VACUUM' ) ) {
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clearstatcache();
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$newSize = filesize( $this->db->mDatabaseFile );
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$this->output( sprintf( "Database size was %d, now %d (%.1f%% reduction).\n",
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$prevSize, $newSize, ( $prevSize - $newSize ) * 100.0 / $prevSize ) );
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} else {
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$this->output( 'Error\n' );
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}
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}
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private function integrityCheck() {
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$this->output( "Performing database integrity checks:\n" );
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$res = $this->db->query( 'PRAGMA integrity_check' );
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if ( !$res || $res->numRows() == 0 ) {
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$this->error( "Error: integrity check query returned nothing.\n" );
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return;
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}
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foreach ( $res as $row ) {
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$this->output( $row->integrity_check );
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}
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}
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private function backup( $fileName ) {
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$this->output( "Backing up database:\n Locking..." );
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$this->db->query( 'BEGIN IMMEDIATE TRANSACTION', __METHOD__ );
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$ourFile = $this->db->mDatabaseFile;
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$this->output( " Copying database file $ourFile to $fileName... " );
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wfSuppressWarnings( false );
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if ( !copy( $ourFile, $fileName ) ) {
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$err = error_get_last();
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$this->error( " {$err['message']}" );
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}
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wfSuppressWarnings( true );
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$this->output( " Releasing lock...\n" );
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$this->db->query( 'COMMIT TRANSACTION', __METHOD__ );
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}
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private function checkSyntax() {
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if ( !Sqlite::IsPresent() ) {
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$this->error( "Error: SQLite support not found\n" );
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}
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$files = array( $this->getOption( 'check-syntax' ) );
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$files += $this->mArgs;
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$result = Sqlite::checkSqlSyntax( $files );
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if ( $result === true ) {
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$this->output( "SQL syntax check: no errors detected.\n" );
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} else {
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$this->error( "Error: $result\n" );
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}
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}
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}
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$maintClass = "SqliteMaintenance";
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require_once RUN_MAINTENANCE_IF_MAIN;
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