create a task to combine plugins from the repository and the live server

[grafikchaos]

Some WordPress plugins have an issue being located within a symlinked directory (share/plugins) so until the WordPress wp_includes/plugin.php plugin_basename patch is accepted into core the plugins directory should not be located within the shared directory but rather stay in the same root directory of the WordPress application.

Because people can download and install plugins through the admin interface, we should create a task to copy the previous release's plugins to the newest release's plugin directory (probably best handled via rsync)