support for folder sync via rsync on windows.

lib/vagrant-aws/action/sync_folders.rb

@@ -4,6 +4,8 @@
 
 require "vagrant/util/scoped_hash_override"
 
+require "vagrant/util/which"
+
 module VagrantPlugins
   module AWS
     module Action
@@ -28,7 +30,18 @@ def call(env)
             # Ignore disabled shared folders
             next if data[:disabled]
 
+            unless Vagrant::Util::Which.which('rsync')
+              env[:ui].warn(I18n.t('vagrant_aws.rsync_not_found_warning'))
+              break
+            end
+
             hostpath  = File.expand_path(data[:hostpath], env[:root_path])
+
+            #rsync interprets paths with colons as remote locations.
+            #We need to pass the "cygdrive" version for the hostpath on windows.
+            if Vagrant::Util::Platform.windows?
+              hostpath = Vagrant::Util::Subprocess.execute("cygpath", "-u", "-a", hostpath).stdout.chomp
+            end
             guestpath = data[:guestpath]
 
             # Make sure there is a trailing slash on the host path to

locales/en.yml

@@ -16,6 +16,9 @@ en:
       Instance is not created. Please run `vagrant up` first.
     ready: |-
       Machine is booted and ready for use!
+    rsync_not_found_warning: |-
+      Warning! Folder sync disabled because the rsync binary is missing.
+      Make sure rsync is installed and the binary can be found in the PATH.
     rsync_folder: |-
       Rsyncing folder: %{hostpath} => %{guestpath}
     terminating: |-