tools.build.api/git-count-revs should support rev-lists path argument

Question

Given a monorepo it's useful to have git-count-revs return only the revs affecting a particular folder.

Ie:

$ cd mymonorepo/service-a
$ git rev-list HEAD --count
1024 # all revs in monorepo
$ git rev-list HEAD --count -- .
17 # only count revs affecting service-a

Answer 1

Good idea - added at 98d1632 for next release.