R devel - Nov 2011 - R CMD <custom>?

Hi,

is it possible to add a custom script such that it is called via R CMD
<custom>?  Is R CMD searching for it elsewhere than R_HOME/bin/?  I'm
looking for an non-admin alternative, so copying the script to
R_HOME/bin/ will not do (in case the user don't have enough permission
to write there).

/Henrik

It'd be cool if R CMD was user extensible through packages, so that (e.g.)

R CMD mypackage::mycommand

would do something like:

path <- system.file("cmd", paste(command, ".r"), package
= package)
if (!file.exists(path)) {
  stop("Command ", command, " in ", package, " does not
exist")
} else {
  source(path)
}

And maybe `R CMD mypackage` would look in mypackcage/cmd/default.r.

Hadley

On Mon, Nov 28, 2011 at 1:16 PM, Henrik Bengtsson <hb at biostat.ucsf.edu>
wrote:
> Hi,
>
> is it possible to add a custom script such that it is called via R CMD
> <custom>? ?Is R CMD searching for it elsewhere than R_HOME/bin/?
?I'm
> looking for an non-admin alternative, so copying the script to
> R_HOME/bin/ will not do (in case the user don't have enough permission
> to write there).
>
> /Henrik
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>


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

On 28/11/2011 2:16 PM, Henrik Bengtsson wrote:
> Hi,
>
> is it possible to add a custom script such that it is called via R CMD
> <custom>?  Is R CMD searching for it elsewhere than R_HOME/bin/? 
I'm
> looking for an non-admin alternative, so copying the script to
> R_HOME/bin/ will not do (in case the user don't have enough permission
> to write there).
I don't remember if this is platform independent,  but

R CMD foo

on Windows will set up standard environment variables then try to 
execute "foo".  If "foo" isn't one of the internal
commands listed by

R CMD --help

then it will just go looking for it like any other command in the path.  
(This is why "R CMD install" gives a funny error message:  the
internal
command is "INSTALL", so "R CMD install" just tries to
execute "install".)

Duncan Murdoch