class Rake::FileCreationTask


any rebuilds of tasks that depend on it whenever it is updated.
not re-triggered if any of its dependencies are newer, nor does trigger
needed if and only if the file has not been created. Once created, it is
A FileCreationTask is a file task that when used as a dependency will be

def needed?

Is this file task needed? Yes if it doesn't exist. 
def needed?
  !File.exist?(name)
end

def timestamp

than any other time stamp.
Time stamp for file creation task. This time stamp is earlier 
def timestamp
  Rake::EARLY
end