Comment 1 for bug 1352348

I am all for adding tools like this but there are a couple hurdles we need to jump first. I think the first one is getting to a place where we run coverage in the check queue and not in the post queue. This may be easier for some projects than others depending on test run time when run under coverage.

The second thing is that diff-cover is AGPLv3 licensed and I think we are not supposed to be depending on AGPLv3 things in global requirements. It may be ok to use this as a test requirement but that would be something to bring up with the openstack/requirements cores.