[R] short suggestion to the R development team

[Duncan Temple Lang]

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I assume you are talking about source() when you say "R file that is
currently being processed".
A few weeks ago I worked on an enhanced version of source.
It allows
* nested source() with relative links,
* looking for files in a pre-defined set of directorys,
* determining the current stack of files/URIs being sourced() in the
nested calls
* recognizing URIs from strings to avoid the need to say
source(url("http://...")

I have this in a package that I have not released, but that I have just
posted at
 http://www.omegahat.org/Prerelease/RSource_0.1-0.tar.gz

It also has a simple implementation of using gpg to manage
encrypted files using an external application.

I have tested the package a little bit and there is some documentation,
but not an excessive amount, shall we say.

And there are some example S files at http://www.omegahat.org/RIO/test
that one can use to test nested source() calls for URIs and examining
the stack of source() calls.

We may put something like this into the R distribution, but
for the moment, it is better to do these things as packages.

 D.

ivo welch wrote:
> Dear R developpment team:  would it be easy to introduce a global variable (in options()) that contains the name 
> of the R file that is currently being processed?  (ala \jobname in latex.) 
> if this is difficult, would it be easy to introduce something like "$0" in perl (i.e., argv[0] in C), 
> which contains the current R file?  I just checked what perl does interactively, when no file is being processed. 
> It fills $0 with "-", though it would seem to me that just "" would be more appropriate.
> 
> sincerely,
> 
> /iaw
> 
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- --
Duncan Temple Lang                duncan at wald.ucdavis.edu
Department of Statistics          work:  (530) 752-4782
371 Kerr Hall                     fax:   (530) 752-7099
One Shields Ave.
University of California at Davis
Davis, CA 95616, USA
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