From 5f0b8a9a6a6cf7c735a1f0c8220fee3eeec3c3cf Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Wed, 26 Aug 2009 22:56:56 +0000
Subject: [PATCH] fix rename_to() on windows

---
 dtool/src/dtoolutil/filename.cxx | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/dtool/src/dtoolutil/filename.cxx b/dtool/src/dtoolutil/filename.cxx
index c64f616cfb..b2ced9d25a 100644
--- a/dtool/src/dtoolutil/filename.cxx
+++ b/dtool/src/dtoolutil/filename.cxx
@@ -2430,6 +2430,15 @@ rename_to(const Filename &other) const {
     return true;
   }
 
+  // Try unlinking the target first.
+  other.unlink();
+  if (rename(temp_os_specific.c_str(),
+             other_os_specific.c_str()) == 0) {
+    // Successfully renamed.
+    unlink();
+    return true;
+  }
+
   // Failed.
   temp.unlink();
   return false;