shorthand syntax for commands

[ivey]

In the 80% case, it seems like most commands will be running actions (with the same name as the command, most likely) on a set of services, or invoking the same named command on several components.

I'd like to propose an alternate shorthand syntax for those execute blocks:

command "start"
service "database", :start
component "widgets", :start
component "flanges", :start
end

OR

command "start", :services => "database", :components => "widgets,flanges"