maintenance/sqlite.php: added an option for safe backup

diff --git a/maintenance/sqlite.php b/maintenance/sqlite.php
index 46a038c..40018bd 100644 (file)
--- a/maintenance/sqlite.php
+++ b/maintenance/sqlite.php
@@ -28,6 +28,7 @@ class SqliteMaintenance extends Maintenance {
                $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 );
        }
 
        public function execute() {
@@ -40,11 +41,17 @@ class SqliteMaintenance extends Maintenance {
 
                $this->db = wfGetDB( DB_MASTER );
 
-               if ( $this->hasOption( 'vacuum' ) )
+               if ( $this->hasOption( 'vacuum' ) ) {
                        $this->vacuum();
+               }
 
-               if ( $this->hasOption( 'integrity' ) )
+               if ( $this->hasOption( 'integrity' ) ) {
                        $this->integrityCheck();
+               }
+
+               if ( $this->hasOption( 'backup-to' ) ) {
+                       $this->backup( $this->getOption( 'backup-to' ) );
+               }
        }
 
        private function vacuum() {
@@ -77,6 +84,21 @@ class SqliteMaintenance extends Maintenance {
                        $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";