From 489f0fd06610697ef5979f347e38c8c7e59cc533 Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Mon, 29 May 2023 15:07:44 +1000
Subject: [PATCH] Continue with install if old installer fails

User may have manually removed files, or the installation may be corrupt.

https://forums.ankiweb.net/t/installing-anki-when-there-seems-to-be-a-previous-version/30621
---
 qt/bundle/win/anki.template.nsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/qt/bundle/win/anki.template.nsi b/qt/bundle/win/anki.template.nsi
index 730cbc444..e0f3173a1 100644
--- a/qt/bundle/win/anki.template.nsi
+++ b/qt/bundle/win/anki.template.nsi
@@ -170,10 +170,18 @@ Section ""
   ${IF} $0 != ""
       ; old value exists, we want to inform the user that a manual uninstall is required first and then start the uninstall.exe
       MessageBox MB_ICONEXCLAMATION|MB_OK "A previous Anki version needs to be uninstalled first. After uninstallation completes, please run this installer again."
+      ClearErrors
       ExecShell "open" "$0\uninstall.exe"
+      IfErrors shellError
       Quit
+  ${ELSE}
+      goto notOldUpgrade
   ${ENDIF}
 
+  shellError:
+    MessageBox MB_OK|MB_ICONEXCLAMATION "Failed to uninstall the old version of Anki. Proceeding with installation."
+  notOldUpgrade:
+
   Call removeManifestFiles
 
   ; Set output path to the installation directory.