Read as file such as .Renviron or Renviron.site in the
format described in the help for Startup, and set environment
variables as defined in the file.
readRenviron(path)A length-one character vector giving the path to the file. Tilde-expansion is performed where supported.
Scalar logical indicating if the file was read successfully. Returned invisibly. If the file cannot be opened for reading, a warning is given.
Startup for the file format.