This function is only exported for use in hook scripts, but it's not intended to be called by the end-user directly.
dirs_R.cache(hook_id)The id of the hook for which we want the relative cache directory.
Other hook script helpers:
diff_requires_run_roxygenize(),
may_require_permanent_cache(),
precommit_docopt(),
robust_purl(),
roxygen_assert_additional_dependencies(),
roxygenize_with_cache()