It's just better than Coveralls.
Use only Codecov for coverage
Just added the appropriate codecov.yml file too. Most configuration is done that way, so feel free to tweak settings from the defaults. I only have the automatic PR comment turned off.
Thanks! Wasn't sure whether it was intentional that we were still using the old UI-based override on Codecov. This brings things nicely in line though.
I had requested they turn it off on their end so we didn't have a file for a service we weren't really using. But now that we're using it, that's a non-issue :)
Settings are here: https://codecov.io/gh/reactjs/react-router/settings/yaml
They have a neat built-in doc viewer where you can click on a node and get the docs on it right there. Pretty cool!
It's super neat. I had to ask their support to fix a few things yesterday to get the PR alerts, but that "patch" alert is super useful, since it directly measures what you care about for a PR, rather than showing you some tiny change to project coverage as a whole.