Check if R is running in RStudio

Question

I am looking for a way to test if R is being run from RStudio. For some reason I could find the answer on google yesterday but not today, but I think it had to do with testi

Answer 1

When I start RStudio it seems to have tools:rstudio in position 2 on the search path. This has a function "RStudio.version" which is undocumented but seems to return the RStudio version string:

> RStudio.version()
[1] "0.96.316"

So you can define:

is.RStudio <- function(){
  if(!exists("RStudio.version"))return(FALSE)
  if(!is.function(RStudio.version))return(FALSE)
  return(TRUE)
}

and maybe use that.