dont alter the path during the bundler cleanup on windows

Signed-off-by: Matt Wrock <[email protected]>

lib/kitchen/driver/vagrant.rb

@@ -359,11 +359,22 @@ def run_command(cmd, options = {})
            RUBYOPT _ORIGINAL_GEM_PATH].each do |var|
           env[var] = nil
         end
-        gem_home = ENV["GEM_HOME"]
-        if gem_home && (env["PATH"] || ENV["PATH"])
-          env["PATH"] ||= ENV["PATH"].dup if ENV["PATH"]
-          gem_bin = File.join(gem_home, "bin") + File::PATH_SEPARATOR
-          env["PATH"][gem_bin] = "" if env["PATH"].include?(gem_bin)
+
+        # Altering the path seems to break vagrant. When the :environment
+        # is passed to a windows process with a PATH, Vagrant's batch installer
+        # (https://github.com/mitchellh/vagrant-installers/blob/master/substrate
+        # /modules/vagrant_installer/templates/windows_vagrant.bat.erb)
+        # does not efectively prepend the vagrant ruby path in a persistent
+        # manner which causes vagrant to use the same ruby as test-kitchen and
+        # then the environment is essentially corrupted leading to many errors
+        # and dispair
+        unless windows_host?
+          gem_home = ENV["GEM_HOME"]
+          if gem_home && (env["PATH"] || ENV["PATH"])
+            env["PATH"] ||= ENV["PATH"].dup if ENV["PATH"]
+            gem_bin = File.join(gem_home, "bin") + File::PATH_SEPARATOR
+            env["PATH"][gem_bin] = "" if env["PATH"].include?(gem_bin)
+          end
         end
 
         super(cmd, merged)