fscache - File System Cache
Manages a file system cache. Regular files can be moved or
copied to the cache folder. Sub-folders can be created in order
to organize the files. Files can be located inside the cache
using a glob function. Text contents can be easily stored in
and retrieved from the cache using dedicated functions. It can
be used for an application or a package, as a global cache, or
as a per-user cache, in which case the standard OS user cache
folder will be used (e.g.: on Linux
$HOME/.cache/R/my_app_or_pkg_cache_folder).
