From 21dd0cccae5c6d72a1b181c2988a82371ceadebd Mon Sep 17 00:00:00 2001
From: Hisham Muhammad <hisham@gobolinux.org>
Date: Tue, 14 Jan 2020 21:41:56 -0300
Subject: util: portable tmpname that gives a full path on Windows

Fixes #1058.
---
 src/luarocks/core/util.lua | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/luarocks/core/util.lua b/src/luarocks/core/util.lua
index bd50ca0b..dae8cfab 100644
--- a/src/luarocks/core/util.lua
+++ b/src/luarocks/core/util.lua
@@ -12,7 +12,10 @@ local require = nil
 -- May be used to read more, passing, for instance, "*a".
 -- @return string: the output of the program.
 function util.popen_read(cmd, spec)
-   local tmpfile = os.tmpname()
+   local dir_sep = package.config:sub(1, 1)
+   local tmpfile = (dir_sep == "\\")
+                   and (os.getenv("TMP") .. "/luarocks-" .. tostring(math.floor(math.random() * 10000)))
+                   or os.tmpname()
    os.execute(cmd .. " > " .. tmpfile)
    local fd = io.open(tmpfile, "rb")
    if not fd then
-- 
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