R CMD <custom>?

That does seem to mix up namespaces quite a bit.

That was just a proposal - equally

R CMD mypackage::mycommand

could just run

mypackage::mycommand()

but then passing argument might get a bit confusing.

But what does it get you
that "Rscript -e" doesn't already give you? ?You can set up your package so
that

R CMD mypackage::mycommand

executes a function, using delayedAssign or some of the more exotic features
(like external pointers and finalizers).

Because you have to specify the path to that package?  R CMD roxygen2
is much easier to type, remember and is portable, compared to
~/R/roxygen2/something.r.  It also makes R CMD scripts extensible by
packages in a consistent manner.

Hadley

Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University
http://had.co.nz/