7d8ce026a2
Add a newtype, GenericArbitrary, which can be used with -XDerivingVia to derive Arbitrary instances for types with Generic, via patching generic-arbitrary to expose the underlying typeclass it uses for surfacing the type information.
34 lines
998 B
Nix
34 lines
998 B
Nix
{ nixpkgs ? import ./nixpkgs.nix {}, compiler ? "ghc865", withHoogle ? true }:
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let
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inherit (nixpkgs) pkgs;
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pkg = import ./pkg.nix { inherit nixpkgs; };
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packageSet = (
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if compiler == "default"
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then pkgs.haskellPackages
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else pkgs.haskell.packages.${compiler}
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).override {
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overrides = import ./haskell-overlay.nix { inherit nixpkgs; };
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};
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haskellPackages = (
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if withHoogle
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then packageSet.override {
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overrides = (self: super: {
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ghc = super.ghc // { withPackages = super.ghc.withHoogle; };
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ghcWithPackages = self.ghc.withPackages;
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# eww https://github.com/NixOS/nixpkgs/issues/16394
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generic-arbitrary = pkgs.haskell.lib.appendPatch
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super.generic-arbitrary
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[ ./generic-arbitrary-export-garbitrary.patch ];
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});
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}
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else packageSet
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);
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drv = haskellPackages.callPackage pkg {};
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inherit (pkgs.haskell.lib) addBuildTools;
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in
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(addBuildTools drv (with haskellPackages; [ cabal-install ])).env
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