Many backup software tools provide a means to exclude directories when they contain a particular file. For example:

• duplicity - --exclude-if-present
• restic - --exclude-if-present
• attic - --exclude-caches (as above but hard-coded to CACHEDIR.TAG)
• duplicacy - -nobackup-file

We can better support the use case of evaluating files for backup by implementing a capability to exclude scanning and showing directories containing a specific file.