Rake::FileCreationTask

        # Rake::FileCreationTask < FileTask

(from gem rake-13.0.6)
---
A FileCreationTask is a file task that when used as a dependency will be
needed if and only if the file has not been created.  Once created, it
is not re-triggered if any of its dependencies are newer, nor does
trigger any rebuilds of tasks that depend on it whenever it is updated.
---
# Instance methods:

    needed?
    timestamp