Ok there are 2 issues:

• the codecov-haskell package looks like it's not maintained anymore and doesn't compile with the newer releases of GHC
• the stack test with --coverage option doesn't produce the full report and is not digestible by codecov-haskell

The solution to both problems would be to take over the codecov-haskell package. Do you think that's a good idea or should it be better solved somehow else?

@mjarosie Can't help you with the first problem. I've only successfully setup coveralls.io not codecov
For the second one though, after stack test --coverage try running:

$ stack hpc report --all

Speaking of the problem with codecov, it might be easier to switch to coveralls.io. There is a working solution on how you can set it up with a stack project. Here is an example: https://coveralls.io/github/lehins/massiv?branch=master

Thanks, I'll give it a whirl next. I was thinking about using coveralls.io as well, I just couldn't find a working solution either. The example will be really useful!

@mjarosie FYI, you can now use a static binary instead of recompiling stack-hpc-coveralls on each run
https://github.com/lehins/stack-hpc-coveralls/releases/tag/0.0.5.0

Something along those line will work:

     stack test --coverage
     stack hpc report --all
     curl -L https://github.com/lehins/stack-hpc-coveralls/releases/download/0.0.5.0/shc.tar.gz | tar xz shc
     ./shc --repo-token=$COVERALLS_REPO_TOKEN combined custom