How to pass command-line arguments when calling source() on an R file within another R file

Question

In one R file, I plan to source another R file that supports reading two command-line arguments. This sounds like a trivial task but I couldn\'t find a solution online. Any

Answer 1

This works:

# source another script with arguments
source_with_args <- function(file, ...){
  commandArgs <<- function(trailingOnly){
    list(...)
  }
  source(file)
}

source_with_args("sourcefile.R", "first_argument", "second_argument")

Note that the built in commandArgs function has to be redefined with <<- instead of <-. As I understand it, this makes its scope extend beyond the function source_with_args() where it is defined.