* patch hpc to allow files to be used for the list of src dirs, hpc dirs, and includes
* delete trailing whitespace
* use Response Files for HPC arguments; delete unnecessary patch
* Add ghc patch based on what was merged upstream
* Fix coverage tests
* Update responseFile usage
* Enable coverage-no-libs test
Co-authored-by: Richard Wallace <rwallace@thewallacepack.net>
Co-authored-by: Hamish Mackenzie <Hamish.K.Mackenzie@gmail.com>
This adds a way to specify the `evalSystem` or `evalPackages` explicitly when calling the `project` functions.
Currently if we want to make a `flake` that supports multiple systems we have few options:
* Require builders for all the supported systems (even just for `nix flake show`).
* Pass `--impure` so that haskell.nix can see `builtins.currentSystem` to set up `pkgs.evalPackages` to use that. Unfortunately this prevents nix from caching some of the work it does and often results in it recalculating for each supported system when it would otherwise be cached and take no time at all.
* Add an overlay to replace `evalPackages`. This works, but it is not straight forward.
* Materialize the nix files for the project.
This change allows `evalSystem = "x86_64-linux";` to be passed telling `haskell.nix` to run `cabal` and `nix-tools` on that system. The user will have to have a builder for that system, but does not need to have builders for the others (unless building outputs for them).
Fixes:
Warning: `stdenv.lib` is deprecated and will be removed in the next release. Please use `pkgs.lib` instead. For more information see https://github.com/NixOS/nixpkgs/issues/108938
* Coverage: allow projects with no libraries
- Prevent projects without a library from breaking the coverage report
generators.
- Added a test to ensure projects without libraries can build coverage
reports.
* Ensure the correct GHC version is used in project coverage reports
- Previously, when trying to determine the version of GHC to use for a
project coverage report, we would attempt to find the version of GHC
used in the constituent coverage reports, or default to the GHC that
is shipped with Nixpkgs. Using the GHC that ships with Nixpkgs is
problematic (specifically the coverage-no-libs tests fail to run on
Hydra), so we now ask the user to pass in the project to the
"projectCoverageReport" function so we can find the correct version of
GHC to use in a foolproof manner.
Peter Becich
Hamish Mackenzie
Shea Levy
Hamish Mackenzie
Samuel Evans-Powell