From bd45d89611aff095a65e22b64a3eb987bdda51b1 Mon Sep 17 00:00:00 2001
From: yumetodo <yume-wikijp@live.jp>
Date: Sun, 28 Jul 2019 12:57:57 +0900
Subject: fix(msys2): detect RubyInstaller correctly

RUBY_PLATFORM =~ /mingw/ also match with pure msys2 mingw64 env

this bug was cause by d79643513b6f939968dc6670de9be27b5cfbde48

ref:
- https://github.com/ruby2d/ruby2d/pull/91
- https://teratail.com/questions/202950
---
 lib/ruby2d.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ruby2d.rb b/lib/ruby2d.rb
index 3fb8721..0562ec5 100644
--- a/lib/ruby2d.rb
+++ b/lib/ruby2d.rb
@@ -20,7 +20,7 @@ unless RUBY_ENGINE == 'mruby'
   require 'ruby2d/sound'
   require 'ruby2d/music'
 
-  if RUBY_PLATFORM =~ /mingw/
+  if defined?(RubyInstaller)
     s2d_dll_path = Gem::Specification.find_by_name('ruby2d').gem_dir + '/assets/mingw/bin'
     RubyInstaller::Runtime.add_dll_directory(File.expand_path(s2d_dll_path))
   end
-- 
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