Files fetched from OSF/GitHub/Zenodo/ResearchBox by data_check and
code_check with cache = TRUE are stored in a lasting on-disk cache so
they are reused across modules and R sessions (never re-downloaded). This
returns that cache's root directory. With cache = FALSE (the default) the
files are kept in a temporary folder that R removes when the session ends.
Details
The cache is never cleared automatically — it has no size cap or expiry, so
it is safe to reuse but grows without bound. Use repo_cache_clear() to
delete it (e.g. to reclaim disk space after a large corpus run).
The location defaults to the folder .metacheck_repo_cache in the working
directory; override it with options(metacheck.repo_cache.dir = "/some/path"),
or move all caches with options(metacheck.cache.dir = "/some/path").