When using the command line option `--list-cache-groups` and having external-dir set and containing external facts, Facter should list the external facts files.
When using the command line option `--list-cache-groups` and having external-dir set and containing external facts, Facter should list the external facts files.
When using the command line option `--list-cache-groups` and having external-dir set and containing external facts, Facter should list the external facts files.