[R] How to pack my stuff into a package (library, collection)?

[Tribo Laboy]

Hi Duncan and list

I hope it is clear from my previous mails, but to make it sure again,
I am talking about R on Windows. So here's what I did.
I installed the Rtools on my home machine last night, then copied the
files and moved them to my work machine today. I set up the PATH
environment variable to include the RTools directory, Perl and MinGW.
I did not install any of the additional packages - TeX, CHM compiler,
Inno Setup. I successfully <but with some warnings> ran R CMD build, R
CMD check and R CMD INSTALL on the package "mypkg" as made by the
exmaple in 'package.skeleton' function.  After the R CMD INSTALL the
package was in R/library/mypkg and could be loaded with
library(mypkg). I zipped the directory structure in R/library/mypkg
and removed the package by remove.packages("mypkg"). Then I could
again reinstall the package from the "binary" zip file from the GUI
menu. Although the CHM files are missing the library integrated very
well with the rest of and the help system. I can see that many of the
files, even R-script files, in the "compiled" directory structure are
modified with added comments from the help files, etc. There are also
the MD5 checks etc, etc. all very good and useful stuff. I really do
appreciate it. Thanks!

Now, may I lay out a couple of suggestions or rather, personal
wish-list items for R.

First about RTools. Is it possible to make R CMD INSTALL etc. read the
path where RTools are installed from an ini file instead of the
environment variable. Then the whole R and Rtools could be easily
moved around regardless of registry settings an environment variables.
And this is a GOOD THING. It saves a lot of time on install-reinstall.
Maybe it even would be possible to make RTools an R package like all
the other packages on CRAN? In this way it will not be included in the
R binary, but will be a click away for those who need it. There may be
licensing issues with this, I don't know...

Second, about the general approach to user function management.
Currently we can "source" R code or load "packaged" R code. Sourcing
is equivalent to typing the source from the keyboard but takes input
from a file. It is a perfect solution for a couple of functions and
simple step-by-step analysis. When there are more than 10-20 user
functions that are sourced this clutters the workspace. The other
option is to "package" the source. The process takes care of the error
checking and help-system integration. When the package is built it can
be installed and loaded as a library, which integrates with the R help
system.

I feel that there is a gap between the two, which could be filled for
the benefit of users, who write large amount of custom code, which,
however, is not intended for distribution as a package. In my case I
have a large number of files dealing with massaging data files from an
in-house made instrument that will not be of use to anyone else.  This
gap could be filled, if it would be possible to add the (pure R)
functions from a certain user directory to the search path and execute
them, whenever they are called. Sourcing a whole directory could also
be an option but it would create two problems - clutter in the
workspace and memory usage for functions, which may not be called
actually.

Well, I am not a developer and probably I don't know what I am talking
about. This is just some feedback in case it might be useful for the
wonderful people that make R. For the time being I will stick with one
of the machines setup for R Development (or more appropriately "R
packaging") while the others will be run only.

Thanks for helping,

TL