From 06f7a36d5fa444d15b3b66799b547cac57d9abc7 Mon Sep 17 00:00:00 2001
From: mitchell <70453897+667e-11@users.noreply.github.com>
Date: Sun, 24 May 2020 13:16:05 -0400
Subject: Always use capital drive letters when opening files in Windows. Since
 Windows filenames are case-insensitive, mismatched drive letter case may
 cause the same file to be open twice.

---
 core/lfs_ext.lua | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'core')

diff --git a/core/lfs_ext.lua b/core/lfs_ext.lua
index 59318da8..abf74dc0 100644
--- a/core/lfs_ext.lua
+++ b/core/lfs_ext.lua
@@ -124,7 +124,9 @@ end
 function lfs.abspath(filename, prefix)
   assert_type(filename, 'string', 1)
   assert_type(prefix, 'string/nil', 2)
-  if WIN32 then filename = filename:gsub('/', '\\') end
+  if WIN32 then
+    filename = filename:gsub('/', '\\'):gsub('^%l:[/\\]', string.upper)
+  end
   if not filename:find(not WIN32 and '^/' or '^%a:[/\\]') and
      not (WIN32 and filename:find('^\\\\')) then
     if not prefix then prefix = lfs.currentdir() end
-- 
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