PreProGuardian is a class that allows run many preprocessor watchers with only one command.

Sample config file:

{
	"sources_root"      : "static-sources/",
	"static_root"       : "static/",
	"consistency_check" : 1,
	"sass":       ["app/styles/", "stylesheets/"],
	"jade":       ["app/partials/", "templates/"],
	"coffee":     ["app/controllers/", "app/directives/", "jquery-widgets/"]
}