From 0158ba7e51cb3fc5a204cb65d1be1618802e08d2 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Wed, 16 Dec 2020 16:28:51 +0900
Subject: [ruby/reline] Make a log file on windows if debug env is set

https://github.com/ruby/reline/commit/dff30a2d44
---
 lib/reline.rb | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'lib/reline.rb')

diff --git a/lib/reline.rb b/lib/reline.rb
index 6a5f9b2390..339b8bc8d7 100644
--- a/lib/reline.rb
+++ b/lib/reline.rb
@@ -200,7 +200,11 @@ module Reline
 
     private def inner_readline(prompt, add_hist, multiline, &confirm_multiline_termination)
       if ENV['RELINE_STDERR_TTY']
-        $stderr.reopen(ENV['RELINE_STDERR_TTY'], 'w')
+        if Reline::IOGate.win?
+          $stderr = File.open(ENV['RELINE_STDERR_TTY'], 'a')
+        else
+          $stderr.reopen(ENV['RELINE_STDERR_TTY'], 'w')
+        end
         $stderr.sync = true
         $stderr.puts "Reline is used by #{Process.pid}"
       end
-- 
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