How do I read the cmdline params for rake?

Rake lets me set ENV properties via the command line but how do I
retrieve all the command line parameters from code in my rakefile? In
particular the task list. It doesn't seem to appear in ENV. Is it
elsewhere?

Why?
I'm working in clearcase and creating an automated build+test system.
The first step is to create a new view (directory tree of sources). Then
I want to automatically rerun the rake command in the new view.

Thanks,
Larry Fast

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