From eb1e4bf240eebec7f572b323e8fb04810a872aee Mon Sep 17 00:00:00 2001
From: =?utf8?q?Bartosz=20Dziewo=C5=84ski?= <matma.rex@gmail.com>
Date: Wed, 11 Jan 2017 10:23:00 -0800
Subject: [PATCH] MysqlInstaller: Restore missing function

Copied from rSVN45497.

I'm not sure how to reproduce the circumstances in which this code gets
called, so I didn't test it. But what we did before was clearly wrong.

Bug: T154670
Change-Id: Id9b0282e7e65543999c9737950f5073ba2e81962
---
 includes/installer/MysqlInstaller.php | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/includes/installer/MysqlInstaller.php b/includes/installer/MysqlInstaller.php
index 5ff47e94f0..72697739c8 100644
--- a/includes/installer/MysqlInstaller.php
+++ b/includes/installer/MysqlInstaller.php
@@ -312,7 +312,7 @@ class MysqlInstaller extends DatabaseInstaller {
 				'IS_GRANTABLE' => 1,
 			], __METHOD__ );
 		foreach ( $res as $row ) {
-			$regex = $conn->likeToRegex( $row->TABLE_SCHEMA );
+			$regex = $this->likeToRegex( $row->TABLE_SCHEMA );
 			if ( preg_match( $regex, $this->getVar( 'wgDBname' ) ) ) {
 				unset( $grantOptions[$row->PRIVILEGE_TYPE] );
 			}
@@ -325,6 +325,19 @@ class MysqlInstaller extends DatabaseInstaller {
 		return true;
 	}
 
+	/**
+	 * Convert a wildcard (as used in LIKE) to a regex
+	 * Slashes are escaped, slash terminators included
+	 */
+	protected function likeToRegex( $wildcard ) {
+		$r = preg_quote( $wildcard, '/' );
+		$r = strtr( $r, [
+			'%' => '.*',
+			'_' => '.'
+		] );
+		return "/$r/s";
+	}
+
 	/**
 	 * @return string
 	 */
-- 
2.20.1