r-session.R
In rstudioapi: Safely Access the RStudio API

## ----setup, include=FALSE-----------------------------------------------------
knitr::opts_chunk$set(eval = FALSE)

## ----eval=FALSE---------------------------------------------------------------
# # check that RStudio is available via rstudioapi -- note that this must
# # be checked prior to calling any other rstudioapi APIs!
# if (rstudioapi::isAvailable()) {
# 
#   # determine more information via
#   info <- rstudioapi::versionInfo()
# 
#   # check for desktop mode
#   info$mode == "desktop"
# 
#   # check for server mode
#   info$mode == "server"
# 
#   # check the version of RStudio in use
#   info$version >= "1.4"
# 
# }
# 
# # check whether RStudio is running without relying on rstudioapi
# .Platform$GUI == "RStudio"  # NOTE: may be unreliable in .Rprofile
# commandArgs()[[1]] == "RStudio"

## -----------------------------------------------------------------------------
# # restart R, then run some code after
# rstudioapi::restartSession(command = "print('Welcome back!')")
# 
# # send some code to the console and execute it immediately
# rstudioapi::sendToConsole("1 + 1", execute = TRUE)

## -----------------------------------------------------------------------------
# setHook("rstudio.sessionInit", function(newSession) {
#   if (newSession)
#     message("Welcome to RStudio ", rstudioapi::getVersion())
# }, action = "append")