Switch to codecov.io from coveralls

[frewsxcv]

Coveralls doesn't care at all about branch coverage reporting, it just cares about lines (lemurheavy/coveralls-public#31). We are already choosing to generate branch coverage stats, but coveralls just ignores them. codecov.io incorporates branch data into their test coverage reporting. You can see an example here using pyca/cryptography (keep in mind I disabled osx support when this ran).

[reaperhulk]

Is there any reason why we couldn't install codecov in our OS X branches for Travis so we can submit there as well?

[jenkins-cryptography]

Can one of the admins verify this patch?

[alex]

ok to test

[frewsxcv]

I didn't disable OSX support in this PR, I disabled it in my fork temporarily since running on OSX costs money (or so I thought?).

[reaperhulk]

Let me ask a less stupid question -- was it disabled in your test because it has to be enabled explicitly by Travis?

[reaperhulk]

Ah, got it. It doesn't cost money but enabling it is on a per repository basis so it wouldn't have run on your fork, correct.

[alex]

Will it leave a comment here after this run?

[frewsxcv]

You can enable/disable that when logged in and viewing the dashboard I think

[frewsxcv]

[codecov-io]

Current Coverage via 8491420 is 89.62%

Merging master into master will change coverage by +0.10%

---

Compare master...master

@@            master   master   diff @@
=======================================
  Files          140      140       
  Stmts         7092     7092       
  Branches       851      851       
=======================================
- Hit           7050     6356   -694
- Partial         42       74    +32
- Missed           0      662   +662

[jenkins-cryptography]

Test PASSed.
Refer to this link for build results: https://jenkins.cryptography.io/job/cryptography-pr-experimental/2362/

[alex]

It looks like codecov doesn't support merging coverage reports together yet. For now I'm going to close this issue, if/when they add support leave a comment adn we can reopen -- otherwise the service looks very nifty.