These functions are Deprecated in this release of devtools, they will be marked as Defunct and removed in a future version.
with_envvar(new, code, action = "replace")
with_makevars(new, code, path = file.path("~", ".R", "Makevars"))
with_path(new, code, add = TRUE)
library paths, prepending to current libpaths
library paths, replacing current libpaths
any locale setting
Temporarily change contents of an existing Makevars file.
PATH environment variable