hpc-lcov

Convert HPC output into lcov.info files that can be uploaded to coverage services, like Codecov.

Quickstart

Stack

1. Run stack install hpc-lcov
2. Run your test(s) with coverage, e.g. stack test --coverage
3. Run hpc-lcov
4. Upload the generated lcov.info file to your coverage service

Cabal

Coming soon! (https://github.com/LeapYear/hpc-lcov/issues/3)

FAQs

How do I convert coverage for an executable?

Note: If you have both tests and executables, HPC will write module information to the same file. Because of this, you'll have to load the coverage for each separately, with a stack clean in between.

1. Build a single executable with coverage enabled (e.g. stack build :my-exe --coverage)
2. Run the executable
3. This should generate a .tix file in the current directory
4. Run the following, specifying the package that builds the executable:

   stack exec -- hpc-lcov --file my-exe.tix --main-package my-package
   

How do I merge coverage files?

1. Install LCOV (e.g. brew install lcov)

2. Run

   lcov -a lcov1.info -a lcov2.info ... > lcov.info
   

Resources

• LCOV format description
• More info on HPC