BaseDriver: fix parsing of SQL with trailing comment without EOL

[closes #102]

Author: JanTvrdik

src/Drivers/BaseDriver.php

@@ -71,7 +71,7 @@ public function loadFile($path)
 		$parseOffset = 0;
 		$queries = 0;
 
-		$space = "(?:\\s|/\\*.*\\*/|(?:#|-- )[^\\n]*\\n|--\\n)";
+		$space = "(?:\\s|/\\*.*\\*/|(?:#|-- )[^\\n]*(?:\\n|\\z)|--(?:\\n|\\z))";
 		$spacesRe = "~\\G{$space}*\\z~";
 		$delimiter = ';';
 		$delimiterRe = "~\\G{$space}*DELIMITER\\s+(\\S+)~i";
@@ -106,6 +106,10 @@ public function loadFile($path)
 					$endRe = isset($endReTable[$found]) ? $endReTable[$found] : '(' . (preg_match('~^-- |^#~', $found) ? "\n" : preg_quote($found) . "|\\\\.") . '|\z)s';
 					while (preg_match($endRe, $content, $match, PREG_OFFSET_CAPTURE, $parseOffset)) { //! respect sql_mode NO_BACKSLASH_ESCAPES
 						$s = $match[0][0];
+						if (strlen($s) === 0) {
+							break 3;
+						}
+
 						$parseOffset = $match[0][1] + strlen($s);
 						if ($s[0] !== '\\') {
 							continue 2;

tests/cases/unit/BaseDriverTest.phpt

@@ -77,7 +77,24 @@ class BaseDriverTest extends Tester\TestCase
 					"\nCREATE TRIGGER `users_bu` BEFORE UPDATE ON `users` FOR EACH ROW BEGIN SELECT 1; END; ",
 					"\nSELECT 2",
 				]
-			]
+			],
+			[
+				'-- ', [],
+			],
+			[
+				"--\n", [],
+			],
+			[
+				"SELECT 1;\n--", [
+					'SELECT 1'
+				],
+			],
+			[
+				"SELECT 1;\n--\nSELECT 2;", [
+					'SELECT 1',
+					"\n--\nSELECT 2",
+				],
+			],
 		];
 	}
 }