commands/rsync-auto: do an initial sync [GH-3327]

CHANGELOG.md

@@ -1,5 +1,9 @@
 ## 1.5.3 (unreleased)
 
+IMPROVEMENTS:
+
+  - commands/rsync-auto: An initial sync is done before watching folders. [GH-3327]
+
 BUG FIXES:
 
   - core: Randomize some filenames internally to improve the parallelism

plugins/synced_folders/rsync/command/rsync_auto.rb

@@ -36,6 +36,16 @@ module VagrantPlugins
             folders = synced_folders(machine)[:rsync]
             next if !folders || folders.empty?
 
+            # Get the SSH info for this machine so we can do an initial
+            # sync to the VM.
+            ssh_info = machine.ssh_info
+            if ssh_info
+              machine.ui.info(I18n.t("vagrant.rsync_auto_initial"))
+              folders.each do |id, folder_opts|
+                RsyncHelper.rsync_single(machine, ssh_info, folder_opts)
+              end
+            end
+
             folders.each do |id, folder_opts|
               # If we marked this folder to not auto sync, then
               # don't do it.

templates/locales/en.yml

@@ -154,6 +154,8 @@ en:
       %{names}
     provisioner_cleanup: |-
       Running cleanup tasks for '%{name}' provisioner...
+    rsync_auto_initial: |-
+      Doing an initial rsync...
     rsync_auto_path: |-
       Watching: %{path}
     rsync_communicator_not_ready: |-