synced_folder: Emit vagrant-mounted upstart event when starting containers

Closes GH-302

CHANGELOG.md

@@ -1,4 +1,4 @@
-## [1.0.0](https://github.com/fgrehm/vagrant-lxc/compare/v1.0.0.alpha.3...v1.0.0) (Sep 22, 2014)
+## [1.0.0](https://github.com/fgrehm/vagrant-lxc/compare/v1.0.0.alpha.3...v1.0.0) (Sep 23, 2014)
 
 BACKWARDS INCOMPATIBILITIES:
 
@@ -8,9 +8,12 @@ BACKWARDS INCOMPATIBILITIES:
 
 IMPROVEMENTS:
 
+  - `vagrant-mounted` upstart event is now emited on containers that support it [[GH-302]]
   - Add support for specifying the `--strip-parameters` used by the [default template](scripts/lxc-template)
     when extracting rootfs tarballs [[GH-311]]
 
+[GH-302]: https://github.com/fgrehm/vagrant-lxc/issues/302
+
 BUG FIXES:
 
   - Check for outdated base boxes when starting containers [[GH-314]]

lib/vagrant-lxc/synced_folder.rb

@@ -46,6 +46,27 @@ module Vagrant
                                 guest_path: data[:guestpath]))
         end
       end
+
+      def enable(machine, folders, _opts)
+        # Emit an upstart event if we can
+        return unless machine.communicate.test("test -x /sbin/initctl")
+
+        # short guestpaths first, so we don't step on ourselves
+        folders = folders.sort_by do |id, data|
+          if data[:guestpath]
+            data[:guestpath].length
+          else
+            # A long enough path to just do this at the end.
+            10000
+          end
+        end
+
+        folders.each do |id, data|
+          guest_path = data[:guestpath]
+          machine.communicate.sudo(
+            "/sbin/initctl emit --no-wait vagrant-mounted MOUNTPOINT=#{guest_path}")
+        end
+      end
     end
   end
 end