How do I make ack ignore a file in a directory?

I have a file in a directory a/b/c.js

I can't ignore c.js with --ignore-file=match:c.js because I want to match other file named c.js

I can't ignore dir a/b with --ignore-dir=a/b because there are other files I care about in a/b

I've tried:

--ignore-file=a/b/c.js       "Invalid filter specification"

I've tried:

--ignore-file=match:/a\/b\/c.js/

Doesn't work, and I'm guessing that it's because ack doesn't read the file path as part of the match, just the name.

I've tried:

--ignore-dir=match:/a\/b\/c.js/     " Non-is filters are not yet supported for --ignore-dir (what?)"

I can't find anything useful in the Ack manual soup. How do I ignore a file in a directory?

Solution