X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/8989532d3de45b196373107c7a812a68ac0ff2d9..d75ce11339b35963b5f8c3d53190819c1c025716:/maintenance/sqlite.php

diff --git a/maintenance/sqlite.php b/maintenance/sqlite.php
new file mode 100644
index 00000000..8886fe74
--- /dev/null
+++ b/maintenance/sqlite.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ * Performs some operations specific to SQLite database backend
+ *
+ * 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
+ *
+ * @ingroup Maintenance
+ */
+
+require_once( dirname(__FILE__) . '/Maintenance.php' );
+
+class SqliteMaintenance extends Maintenance {
+	public function __construct() {
+		parent::__construct();
+		$this->mDescription = "Performs some operations specific to SQLite database backend";
+		$this->addOption( 'vacuum', 'Clean up database by removing deleted pages. Decreases database file size' );
+		$this->addOption( 'integrity', 'Check database for integrity' );
+		$this->addOption( 'backup-to', 'Backup database to the given file', false, true );
+	}
+
+	/**
+	 * While we use database connection, this simple lie prevents useless --dbpass and
+	 * --dbuser options from appearing in help message for this script.
+	 */
+	public function getDbType() {
+		return Maintenance::DB_NONE;
+	}
+
+	public function execute() {
+		global $wgDBtype;
+		
+		if ( $wgDBtype != 'sqlite' ) {
+			$this->error( "This maintenance script requires a SQLite database.\n" );
+			return;
+		}
+
+		$this->db = wfGetDB( DB_MASTER );
+
+		if ( $this->hasOption( 'vacuum' ) ) {
+			$this->vacuum();
+		}
+
+		if ( $this->hasOption( 'integrity' ) ) {
+			$this->integrityCheck();
+		}
+
+		if ( $this->hasOption( 'backup-to' ) ) {
+			$this->backup( $this->getOption( 'backup-to' ) );
+		}
+	}
+
+	private function vacuum() {
+		$prevSize = filesize( $this->db->mDatabaseFile );
+		if ( $prevSize == 0 ) {
+			$this->error( "Can't vacuum an empty database.\n", true );
+		}			
+
+		$this->output( 'VACUUM: ' );
+		if ( $this->db->query( 'VACUUM' ) ) {
+			clearstatcache();
+			$newSize = filesize( $this->db->mDatabaseFile );
+			$this->output( sprintf( "Database size was %d, now %d (%.1f%% reduction).\n",
+				$prevSize, $newSize, ( $prevSize - $newSize) * 100.0 / $prevSize ) );
+		} else {
+			$this->output( 'Error\n' );
+		}
+	}
+
+	private function integrityCheck() {
+		$this->output( "Performing database integrity checks:\n" );
+		$res = $this->db->query( 'PRAGMA integrity_check' );
+
+		if ( !$res || $res->numRows() == 0 ) {
+			$this->error( "Error: integrity check query returned nothing.\n" );
+			return;
+		}
+
+		foreach ( $res as $row ) {
+			$this->output( $row->integrity_check );
+		}
+	}
+
+	private function backup( $fileName ) {
+		$this->output( "Backing up database:\n   Locking..." );
+		$this->db->query( 'BEGIN IMMEDIATE TRANSACTION', __METHOD__ );
+		$ourFile = $this->db->mDatabaseFile;
+		$this->output( "   Copying database file $ourFile to $fileName... " );
+		wfSuppressWarnings( false );
+		if ( !copy( $ourFile, $fileName ) ) {
+			$err = error_get_last();
+			$this->error( "      {$err['message']}" );
+		}
+		wfSuppressWarnings( true );
+		$this->output( "   Releasing lock...\n" );
+		$this->db->query( 'COMMIT TRANSACTION', __METHOD__ );
+	}
+}
+
+$maintClass = "SqliteMaintenance";
+require_once( DO_MAINTENANCE );
\ No newline at end of file