Make a temporary (sub-)directory

Create a temporary subdirectory in .RequireTempPath(), or a temporary file in that temporary subdirectory.

tempdir2(sub = "", tempdir = getOption("Require.tempPath", .RequireTempPath()))

Arguments

sub	Character string, length 1. Can be a result of `file.path("smth", "smth2")` for nested temporary sub directories.
tempdir	Optional character string where the temporary dir should be placed. Defaults to `.RequireTempPath()`