[R] Convert windows package to Linux source package

[Renaud Gaujoux]

Hi,

is there a simple way, I mean a utility that converts a windows package 
(.zip file) to a Linux source package (tar.gz or even simply extract the 
source code and Rd files needed to run successfully a R CMD check).
The windows package doesn't have any external lib, C code, etc..., just 
plain R code, so in theory it is quite straight forward (extract the 
code from the functions, and re-separate the Rd files from the man 
directory.

Any idea?

Thanks