module Rails::Generators::Actions

def generate(what, *args)

are joined together and passed to the generator.
The first argument is the generator name, and the remaining arguments

generate "scaffold", "Post", "title:string", "body:text"
generate "scaffold", "Post title:string body:text"

Runs another generator.
def generate(what, *args)
  log :generate, what
  options = args.extract_options!
  options[:abort_on_failure] = !options[:inline]
  rails_command "generate #{what} #{args.join(" ")}", options
end