1 files changed, 67 insertions, 0 deletions
diff --git a/maintenance/sqlite.inc b/maintenance/sqlite.inc
new file mode 100644
index 00000000..238fe82b
--- /dev/null
+++ b/maintenance/sqlite.inc
@@ -0,0 +1,67 @@
+<?php
+
+/**
+ * This class contains code common to different SQLite-related maintenance scripts
+ */
+class Sqlite {
+
+	/**
+	 * Checks whether PHP has SQLite support
+	 * @return bool
+	 */
+	public static function isPresent() {
+		wfSuppressWarnings();
+		$compiled = wfDl( 'pdo_sqlite' );
+		wfRestoreWarnings();
+		return $compiled;
+	}
+
+	/**
+	 * Checks given files for correctness of SQL syntax. MySQL DDL will be converted to
+	 * SQLite-compatible during processing.
+	 * Will throw exceptions on SQL errors
+	 * @return mixed true if no error or error string in case of errors
+	 */
+	public static function checkSqlSyntax( $files ) {
+		if ( !Sqlite::isPresent() ) {
+			throw new MWException( "Can't check SQL syntax: SQLite not found" );
+		}
+		if ( !is_array( $files ) ) {
+			$files = array( $files );
+		}
+
+		$allowedTypes = array_flip( array(
+			'integer',
+			'real',
+			'text',
+			'blob', // NULL type is omitted intentionally
+		) );
+
+		$db = new DatabaseSqliteStandalone( ':memory:' );
+		try {
+			foreach ( $files as $file ) {
+				$err = $db->sourceFile( $file );
+				if ( $err != true ) {
+					return $err;
+				}
+			}
+
+			$tables = $db->query( "SELECT name FROM sqlite_master WHERE type='table'", __METHOD__ );
+			foreach ( $tables as $table ) {
+				if ( strpos( $table->name, 'sqlite_' ) === 0 ) continue;
+
+				$columns = $db->query( "PRAGMA table_info({$table->name})", __METHOD__ );
+				foreach ( $columns as $col ) {
+					if ( !isset( $allowedTypes[strtolower( $col->type )] ) ) {
+						$db->close();
+						return "Table {$table->name} has column {$col->name} with non-native type '{$col->type}'";
+					}
+				}
+			}
+		} catch ( DBError $e ) {
+			return $e->getMessage();
+		}
+		$db->close();
+		return true;
+	}
+ };
+\ No newline at end of file