Changes to the haskell.nix code to fix broken tests:
* Add missing `then` to `call-cabal-project-to-nix.nix`.
* Fix default `hsSourceDirs` so that `.` gets included for `.all` component if one of the components does not have a `hsSourceDir` set.
* Fix `haskellNixRoots` so it works when cross compiling to windows.
Improvements to the haskell.nix tests:
* Run haskell.nix tests of nixpkgs 19.03 and 19.09.
* Run haskell.nix tests cross compiled to Windows under Wine (when possible).
* Add nix used as IFD inputs as tests to ensure they are cached.
* Use `haskell-nix.cabal-install` instead of `nixpkgs.cabal-install` in tests.
When a project's source directory is empty (i.e. no files have been
added to the project's corresponding git repo), a more friendly error
message will now be printed
* cleanSourceHaskell: Add more filters
* cleanSourceHaskell: Add a "name" parameter, split away the filter
* cleanSourceHaskell: Make it compatible with nixpkgs-19.03
* Adjust usage of cleanSourceHaskell in nix-tools
* Add information about the binary cache to README.org
* Add binary cache section to the User Guide
Put the subsection right above "Using Haskell.nix with your project" in
the General section of the User Guide so new users are likely to see it.
It is easy to mistakenly pass in a `haskell.compiler.ghcXXX` compiler
instead of a `haskell-nix.compiler.ghcXXX` one. This leads to subtle
bugs (for instance missing Cabal library patch).
When we are not in a worktree the submodule info is in the
`.git` dirs scattered throughout the repo itself. In that situation
we need to copy the `.git` dirs into the temp location we are using
to run `git ls-files`.
Without this fix `shellFor` fails for packages where a component has
a `preCheck` or `postCheck` option set. It should be safe to exclude
these because `shellFor` uses `phases = ["installPhase"]` and it seems
like a bad idea to use `all` for running tests (better to run the
individual `tests` components).
Like `plan-nix` for `cabalProject` this gives us a way to inspect the
nix files generated by `stack-to-nix`. It may also adds `stackProject'`
that like `cabalProject'` allows us to get `stack-nix` independently of
hsPkgs (to avoid unwanted evaluation). This can be useful for caching
and preventing GC of evaluation time dependencies of the project.
Currently the haskell.nix overlays replace `haskell` and
`haskellPackages` in the root of pkgs with versions that have just a
fraction of what nixpkgs provides.
Although `haskell-nix.haskellPackages` could be used to provide a much
more complete set there are subtle differences that are likely to cause
issues (and nixpkgs has patches for many haskell packages).
To make it possible for haskell.nix and nixpkgs haskell to coexist,
we need to move the remaining parts of haskell.nix outside of the
`haskell-nix` attribute into `haskell-nix`.
```
ghc -> haskell-nix.ghc
cabal-install -> haskell-nix.cabal-install
haskell.compiler -> haskell-nix.compiler
haskell.packages -> haskell-nix.packages
bootstrap.haskell.compiler -> haskell-nix.bootstrap.compiler
bootstrap.haskell.packages -> haskell-nix.bootstrap.packages
```
The following `haskellPackages` have been removed and instead the
nixpkgs versions will now be in `haskellPackages`. User code should
be updated if the nixpkgs versions are not desired:
```
haskellPackages.hoogle
-> haskell-nix.haskellPackages.hoogle.components.exes.hoogle
haskellPackages.happy
-> haskell-nix.haskellPackages.happy.components.exes.happy
haskellPackages.alex
-> haskell-nix.haskellPackages.alex.components.exes.alex;
```
Guard code has been added to overlays/defaults.nix to prevent us
inadvertently depending on the nixpkgs `haskell` or `haskellPackages`
inside the haskell.nix code base.
We added a setup component to allow overriding of the config used to
to build Setup.hs. The code that deals with library components
was misidentifying this component as a library.
Currently when a dependency of cabal-install or plan-to-nix changes
the cabal new-configure and plan-to-nix have to be rebuilt in order
to recalculate the plan-nix for bootstrap packages alex, happy and
hscolour. We have pinned the inputs such as hackage index-state
so that the plan generated should be the same. Unfortunately it can
still result in a long wait.
Haskell.nix does cache the result via haskellNixRoots when built on
iohk's hydra server. But if you use a different version of nixpkgs
it is unlikely to work. If you have access to a CI that populates a
nix cache you can add haskellNixRoots to your CI build, but if not
you are kind of stuck.
One option to help with this would be to include the plan-to-nix output
in the haskell.nix git repository. But intermediate files in git is
not nice.
Instead this PR adds just the hashes of the output to the derivations
that runs plan-to-nix. Since the inputs are fixed or should have
no affect on the result (GCC version for instance), we should
be able to rely on them remaining constant.
* tests: Add regression test for shellFor build-tools bug
* tests: Fix regen script
* Regenerate nix expressions for tests
* tests: ghc 8.4.4 -> 8.6.5
* shellFor: Fix bug where packages were not excluded from the env
If a multi-package project had an build-tools dependency between
packages, they would not be correctly removed from the shell's inputs.
Projects like asterius and leksah that include dependencies on ghc. Sometimes the are needed by a setup.hs file (as is the case for the binaryen package used by asterius). The recent overlays merge broke this and #279 was needed to allow reinstallableLibGhc to be used to fix it. This PR adds a test case to make sure it is not inadvertently broken again. Also gives us a place to try out better ways to make this type of package work.* Test setup deps issue depending on ghc and Cabal
* Uses nixpkgs 19.09 + macOS wine fix on hydra/buildkite
* Enables macOS hydra tests
* disables musl tests for now
* Adds haskellNixRoots to tests
* Uses reinstallableLibGhc to fix the new setup-depends test
* Adds meta.platforms to haskell.nix components
* Set meta.platforms on cabal-install
* Builds some maintainer-scripts on hydra
* Pins hackage index-state for ghc-extra-packages
