synced_folders/rsync: rsync__auto options

plugins/synced_folders/rsync/command/rsync_auto.rb

@@ -36,6 +36,10 @@ module VagrantPlugins
             next if !folders || folders.empty?
 
             folders.each do |id, folder_opts|
+              # If we marked this folder to not auto sync, then
+              # don't do it.
+              next if folder_opts.has_key?(:auto) && !folder_opts[:auto]
+
               hostpath = folder_opts[:hostpath]
               hostpath = File.expand_path(hostpath, machine.env.root_path)
               paths[hostpath] ||= []

website/docs/source/v2/synced-folders/rsync.html.md

@@ -42,6 +42,9 @@ The rsync synced folder type accepts the following options:
 * `rsync__args` (string or array of strings) - A list of arguments to supply
   to `rsync`. By default this is "--verbose --archive --delete -z".
 
+* `rsync__auto` (boolean) - If false, then `rsync-auto` will not
+  watch and automatically sync this folder. By default, this is true.
+
 * `rsync__exclude` (string or array of strings) - A list of files or directories
   to exclude from the sync. The values can be any acceptable rsync exclude
   pattern. By default, the ".vagrant/" directory is excluded. We recommend