I would like to write a block of code that runs when a script is being
run from Rscript, but not to run if the same file is being source()d,
or submitted via ESS, etc. As a gloss I would like to write a file
that looks somewhat like:
#!/usr/bin/env Rscript
my.func <- function(...) {
#do something...
}
if ( #is.running.Rscript# ) {
do.call(my.func, commandArgs(trailingOnly=TRUE))
}
If it helps, I'm thinking of something similar to the Python idiom of
writing
#!/usr/bin/env python
#class, function definitions
if (__name__=='__main__'):
#code to be executed when running this file directly
The intent is to use R's debugging facilities to help solve a problem
that occurs when a script is invoked (from a makefile) with particular
arguments. So if the makefile invokes "my.script datafile" then I can
track down the problem by sourcing the script into R and trying
my.func("datafile")
Is this doable, or is there a better alternative?
Peter
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