From 1c779be7fbd435a4c022dc7d7bb9b29a11169a08 Mon Sep 17 00:00:00 2001
From: Fomafix <fomafix@googlemail.com>
Date: Mon, 11 Apr 2016 12:41:39 +0200
Subject: [PATCH] MergeHistory: Duplicate watchers on history merge

Bug: T132130
Change-Id: Ibb2be4f6f975f8f3c542689530fc120f8a464914
---
 includes/MergeHistory.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/includes/MergeHistory.php b/includes/MergeHistory.php
index 9d63869641..b969e0394c 100644
--- a/includes/MergeHistory.php
+++ b/includes/MergeHistory.php
@@ -24,6 +24,7 @@
  *
  * @file
  */
+use MediaWiki\MediaWikiServices;
 use Wikimedia\Timestamp\TimestampException;
 use Wikimedia\Rdbms\IDatabase;
 
@@ -335,6 +336,10 @@ class MergeHistory {
 		}
 		$this->dest->invalidateCache(); // update histories
 
+		// Duplicate watchers of the old article to the new article on history merge
+		$store = MediaWikiServices::getInstance()->getWatchedItemStore();
+		$store->duplicateAllAssociatedEntries( $this->source, $this->dest );
+
 		// Update our logs
 		$logEntry = new ManualLogEntry( 'merge', 'merge' );
 		$logEntry->setPerformer( $user );
-- 
2.20.1