Nothing
ensure_existing_path <- function(path) {
if (!file.exists(path))
stopf("no file at path '%s'", path)
invisible(path)
}
ensure_existing_file <- function(path) {
info <- renv_file_info(path)
if (is.na(info$isdir))
stopf("no file at path '%s'", path)
else if (identical(info$isdir, TRUE))
stopf("file '%s' exists but is a directory")
invisible(path)
}
ensure_directory <- function(paths, umask = NULL) {
# handle zero-path case
if (empty(paths))
return(invisible(paths))
# set umask if necessary
if (!is.null(umask))
renv_scope_umask("0")
# for each path, try to either create the directory, or assert that
# the directory already exists. this should also help handle cases
# where 'dir.create()' fails because another process created the
# directory at the same time we attempted to do so
for (path in paths) {
ok <-
dir.create(path, recursive = TRUE, showWarnings = FALSE) ||
dir.exists(path)
if (!ok)
stopf("failed to create directory at path '%s'", path)
}
# return the paths
invisible(paths)
}
ensure_parent_directory <- function(path) {
ensure_directory(unique(dirname(path)))
}
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