use rbconfig for detecting Windows

Paulo Bittencourt · pbitty · commit 3edc923b2286 · 2013-11-20T22:15:39.000-05:00
diff --git a/lib/vagrant-hostmanager/hosts_file.rb b/lib/vagrant-hostmanager/hosts_file.rb
@@ -129,8 +129,10 @@ def get_machines
 
       ## Windows support for copying files, requesting elevated privileges if necessary
       module WindowsSupport
+        require 'rbconfig'
+
         def self.windows?
-          ENV['OS'] === 'Windows_NT'
+          RbConfig::CONFIG['host_os'] =~ /mswin|mingw|cygwin/
         end
 
         require 'win32ole' if windows?
