[R] Feedback requested on a solution to specifying R-scripts on the command line

[Mike R]

Hi All,

I'm new to R and would like to get started on the right
foot, so to say.  So I am requesting feedback on a
paradigm for organizing R projects. In esence, I am
trying to organize my R projects in the same way I
organize my numerical simulations.  But it feels like
I am imposing 

In particular, I'm not sure why the ability to specify 
R-scripts on the command line is not "built in" to R.  
For example, am I not understanding the traditional 
paradigm for R projects? If so, is there documentation 
that gives a practical orientation to R projects?

>From the command line, I'd like to be able to start an 
interactive R session and at the same time, be able
to specify on the command line a project-specific or 
task-specific script (R code) that is to be executed
at the beginning of the session.

My current solution is the following:

Add the following line to dot-Rprofile:

.First <- function() 
{ 
 if( Sys.getenv("R_CUSTOM") != "" )
 {
  for ( filename in strsplit(Sys.getenv("R_CUSTOM")," ")[[1]] )
  {
   source( filename )
  }
 }
}

Then set the environement variable R_CUSTOM using a wrapper.  
Here is a wrapper for bash:

#! /bin/bash
export R_CUSTOM=$*
R 

If the wrapper file is named wrapR then here are some sample 
command lines (my shell prompt is set to ##):

## wrapR  

## wrapR  project_kit.R

## wrapR  project_kit.R  00task_verify_mikes_datafile.R

## wrapR  project_kit.R  02task_verify_jeffs_datafile.R

## wrapR  project_kit.R  11task_analyze_pooled_data.R

## wrapR  project_kit.R  21task_generate_figures_for_executivesummary.R

## wrapR  project_kit.R  22task_generate_figures_for_paper.R

Normally these could be run using redirection, 
as in the following command line:

## R < 22kit_n_task_generate_figures_for_paper.R

but in that case, R exits when through.

Any comments would be welcome.  

Thanks in advance,
Mike