From 14fe0985f7ac6cce317e355ae457e7cf5fbb8ee4 Mon Sep 17 00:00:00 2001
From: Jussi Pakkanen <jpakkane@gmail.com>
Date: Thu, 28 Jun 2018 00:13:01 +0300
Subject: [PATCH] Add upgrade support to the MSI generator. [skip ci]

---
 msi/createmsi.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/msi/createmsi.py b/msi/createmsi.py
index c48d0d841f59..f21e73a31c93 100755
--- a/msi/createmsi.py
+++ b/msi/createmsi.py
@@ -131,6 +131,9 @@ def generate_files(self):
             'SummaryCodepage': '1252',
         })
 
+        ET.SubElement(product, 'MajorUpgrade',
+                      {'DowngradeErrorMessage': 'A newer version of Meson is already installed.'})
+
         if self.bytesize == 64:
             package.set('Platform', 'x64')
         ET.SubElement(product, 'Media', {