From ff11488c6a9d60f757b27018b0d7050bb943fa2b Mon Sep 17 00:00:00 2001
From: Perry Werneck <perry.werneck@gmail.com>
Date: Thu, 19 May 2022 09:22:22 -0300
Subject: [PATCH] Testing if the app is already installed on windows package.

---
 win/pw3270.nsi.in | 7 +++++++
 1 file changed, 7 insertions(+), 0 deletions(-)

diff --git a/win/pw3270.nsi.in b/win/pw3270.nsi.in
index d820dc0..c2ee56c 100644
--- a/win/pw3270.nsi.in
+++ b/win/pw3270.nsi.in
@@ -387,6 +387,13 @@ SectionEnd
 
 Function .onInit
 
+	#---[ Check if already installed ]--------------------------------------------------------------------
+
+	${If} ${FileExists} "$INSTDIR\@PRODUCT_NAME@.exe"
+		MessageBox MB_OK|MB_ICONEXCLAMATION "@PRODUCT_NAME@ is already installed. Please uninstall it first" /SD IDOK
+		Abort
+	${EndIf}
+
 	#---[ Check SDK Command line option ]-----------------------------------------------------------------
 
 !ifdef WITHSDK
--
libgit2 0.21.2