New release: startup 0.10.0 is now on CRAN.
If your R startup files (.Renviron and .Rprofile) get long and windy, or if you want to make parts of them public and other parts private, then you can use the startup package to split them up in separate files and directories under .Renviron.d/ and .Rprofile.d/. For instance, the .Rprofile.d/repos.R file can be solely dedicated to setting in the repos option, which specifies from which web servers R packages are installed from.