From c87ae806abdf79dd5d000aaec47596122a93b29b Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@microsoft.com>
Date: Fri, 9 Sep 2016 16:37:53 -0700
Subject: Issue #25144: Ensures TargetDir is set before continuing with custom
 install.

---
 Misc/NEWS                                                    | 3 +++
 Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/Misc/NEWS b/Misc/NEWS
index e05e8e7..aeb38a1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -275,6 +275,9 @@ Tools/Demos
 Windows
 -------
 
+- Issue #25144: Ensures TargetDir is set before continuing with custom
+  install.
+
 - Issue #27469: Adds a shell extension to the launcher so that drag and drop
   works correctly.
 
diff --git a/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp b/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
index b7b2ecf..6a67ee2 100644
--- a/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
+++ b/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
@@ -327,6 +327,9 @@ class PythonBootstrapperApplication : public CBalBaseBootstrapperApplication {
         case ID_CUSTOM_INSTALL_BUTTON:
             SavePageSettings();
 
+            hr = EnsureTargetDir();
+            ExitOnFailure(hr, L"Failed to set TargetDir");
+
             hr = BalGetStringVariable(L"TargetDir", &targetDir);
             if (SUCCEEDED(hr)) {
                 // TODO: Check whether directory exists and contains another installation
-- 
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