Where crdoc keeps its files.
Class methods
cache_dir
Re-fetchable data: $XDG_CACHE_HOME/crdoc, else ~/.cache/crdoc.
data_dir
Expensive-to-rebuild data: $XDG_DATA_HOME/crdoc, else ~/.local/share/crdoc.
write_atomic(path :
Path, & :
IO -> ) :
Nil Writes to a temp file beside path, then renames it into place, so
readers never see a partial file. Raises IO::Error on failure.