From de95f557b00e3793d1befbc1dd7a763b16c91a31 Mon Sep 17 00:00:00 2001
From: Charles Oliver Nutter <headius@headius.com>
Date: Tue, 10 Dec 2024 15:48:18 -0600
Subject: [PATCH] Check for Windows in JRuby-compatible way

---
 lib/resolv.rb | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/lib/resolv.rb b/lib/resolv.rb
index 232a339..279d05d 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -160,11 +160,14 @@ class ResolvError < StandardError; end
 
   class ResolvTimeout < Timeout::Error; end
 
+  WINDOWS = /mswin|cygwin|mingw|bccwin/ =~ RUBY_PLATFORM || ::RbConfig::CONFIG['host_os'] =~ /mswin/
+  private_constant :WINDOWS
+
   ##
   # Resolv::Hosts is a hostname resolver that uses the system hosts file.
 
   class Hosts
-    if /mswin|mingw|cygwin/ =~ RUBY_PLATFORM and
+    if WINDOWS
       begin
         require 'win32/resolv'
         DefaultFileName = Win32::Resolv.get_hosts_path || IO::NULL
@@ -994,7 +997,7 @@ def Config.default_config_hash(filename="/etc/resolv.conf")
         if File.exist? filename
           config_hash = Config.parse_resolv_conf(filename)
         else
-          if /mswin|cygwin|mingw|bccwin/ =~ RUBY_PLATFORM
+          if WINDOWS
             require 'win32/resolv'
             search, nameserver = Win32::Resolv.get_resolv_info
             config_hash = {}