ack: Exclude specific directories from search via regex

Question

How do I ignore specific directories via RegEx with ack?

I can use the --ignore-dir option, but this does not let me specify a RegEx. I want to be able to i

Answer 1

Use the undocumented option "--invert-file-match" (ack version on my system: 1.96):

$ ack pattern -G 'test|tests' --invert-file-match

Well, it is sort of documented:

$ ack --help|grep invert
-v, --invert-match    Invert match: select non-matching lines
--invert-file-match   Print/search handle files that do not match -g/-G.

It is not documented in its perldoc.