How to dynamically change R .libPaths() based on hostname?

Question

I have two virtual machines running two different versions of GNU/Linux and accessing the same R executable from the same user account.

I'd like to use different libraries depending on the operating system. Right now I'm (un)commenting an R_LIBS= environment variable each time I switch systems. Is there a better way to do this?

I tried placing if-then logic in bash syntax based on uname -n , but got the following warning:

   File /home/wdkrnls/.Renviron contains invalid line(s)
      then
      else
      fi
   They were ignored

I take it this file doesn't support programming constructs.

Answer 1

Something like this?

machine_name <- Sys.info()['nodename']

if (machine_name == 'myMachine1') {
   .libPaths(...)
} else {
   .libPaths(...)
}