sqlite.php

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<?php
require_once( __DIR__ . '/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 );
                $this->addOption( 'check-syntax', 'Check SQL file(s) for syntax errors', false, true );
        }

        public function getDbType() {
                return Maintenance::DB_NONE;
        }

        public function execute() {
                // Should work even if we use a non-SQLite database
                if ( $this->hasOption( 'check-syntax' ) ) {
                        $this->checkSyntax();
                        return;
                }

                $this->db = wfGetDB( DB_MASTER );

                if ( $this->db->getType() != 'sqlite' ) {
                        $this->error( "This maintenance script requires a SQLite database.\n" );
                        return;
                }

                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__ );
        }

        private function checkSyntax() {
                if ( !Sqlite::IsPresent() ) {
                        $this->error( "Error: SQLite support not found\n" );
                }
                $files = array( $this->getOption( 'check-syntax' ) );
                $files += $this->mArgs;
                $result = Sqlite::checkSqlSyntax( $files );
                if ( $result === true ) {
                        $this->output( "SQL syntax check: no errors detected.\n" );
                } else {
                        $this->error( "Error: $result\n" );
                }
        }
}

$maintClass = "SqliteMaintenance";
require_once( RUN_MAINTENANCE_IF_MAIN );