Nothing
renv_envvar_path_add <- function(envvar, value, prepend = TRUE) {
old <- Sys.getenv(envvar, unset = "")
old <- strsplit(old, .Platform$path.sep)[[1]]
parts <- if (prepend) union(value, old) else union(old, value)
new <- paste(parts, collapse = .Platform$path.sep)
names(new) <- envvar
do.call(Sys.setenv, as.list(new))
new
}
renv_envvar_exists <- function(key) {
!is.na(Sys.getenv(key, unset = NA))
}
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