Check if data directory exists and create a new directory if needed

Get the path for a package-specific cache directory with rappdirs::user_cache_dir(), check for the existence of a data directory, optionally create a new directory at the provided path location.

Usage

get_data_dir(
  path = NULL,
  cache = FALSE,
  create = TRUE,
  ask = TRUE,
  appname = NULL,
  pkg = NULL,
  allow_null = TRUE,
  quiet = FALSE,
  call = caller_env()
)

list_path_filenames(
  path,
  fileext = NULL,
  pattern = NULL,
  full.names = TRUE,
  call = caller_env(),
  ...
)

Arguments

path: Path to directory for use as data directory.
cache: If TRUE, and path is NULL set path to rappdirs::user_cache_dir() (using value of pkg as appname). If path is not NULL, the path is returned even if cache is TRUE.
create: If FALSE and path does not exist, return path with a warning. If TRUE and rlang::is_interactive() is TRUE, ask user if directory should be created. If the session not interactive and create is TRUE, a new directory will be created.
ask: If TRUE, create is FALSE, and session is interactive, ask to create directory if the provided directory does not exist.
appname, pkg: pkg is used if appname is NULL. Passed to rappdirs::user_cache_dir()
allow_null: If TRUE, path is NULL, cache is FALSE, return the NULL path value; defaults to TRUE.
quiet: If TRUE, suppress informational messages.
call: The execution environment of a currently running function, e.g. caller_env(). The function will be mentioned in error messages as the source of the error. See the call argument of abort() for more information.
fileext: File extension. If supplied to list_path_filenames() and pattern is NULL, only return file names matching this extension.
pattern: an optional regular expression. Only file names which match the regular expression will be returned.
full.names: a logical value. If TRUE, the directory path is prepended to the file names to give a relative file path. If FALSE, the file names (rather than paths) are returned.
...: Additional parameters passed to list.files() by list_path_filenames().