flake.nix

   1 {
   2   inputs = {
   3     nixpkgs.url = "flake:nixpkgs";
   4     pre-commit-hooks.url = "github:cachix/pre-commit-hooks.nix";
   5     pre-commit-hooks.inputs.nixpkgs.follows = "nixpkgs";
   6   };
   7   outputs = inputs:
   8     let
   9       pkg = "symantic-base";
  10       lib = inputs.nixpkgs.lib;
  11       forAllSystems = f: lib.genAttrs lib.systems.flakeExposed (system: f rec {
  12         inherit system;
  13         pkgs = inputs.nixpkgs.legacyPackages.${system};
  14         haskellPackages = pkgs.haskellPackages.extend (with pkgs.haskell.lib; hfinal: hsuper: {
  15           ${pkg} = buildFromSdist (hfinal.callCabal2nix pkg ./. { });
  16         });
  17       });
  18     in
  19     rec {
  20       # nix -L build
  21       defaultPackage = forAllSystems ({ haskellPackages, ... }: haskellPackages.${pkg});
  22       # nix -L develop  or  direnv allow
  23       devShell = forAllSystems ({ pkgs, haskellPackages, system, ... }:
  24         haskellPackages.shellFor {
  25           packages = ps: [ ps.${pkg} ];
  26           nativeBuildInputs = [
  27             haskellPackages.cabal-install
  28             haskellPackages.ghcid
  29             haskellPackages.haskell-language-server
  30             haskellPackages.hlint
  31             pkgs.git-chglog
  32             pkgs.reuse
  33           ];
  34           withHoogle = false;
  35           inherit (checks.${system}.pre-commit-check) shellHook;
  36         });
  37       # nix flake check
  38       checks = forAllSystems (args: with args; {
  39         pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
  40           src = ./.;
  41           #settings.ormolu.cabalDefaultExtensions = true;
  42           settings.ormolu.defaultExtensions = [
  43             "ImportQualifiedPost"
  44             "TypeApplications"
  45           ];
  46           hooks = {
  47             hlint.enable = true;
  48             nixpkgs-fmt.enable = true;
  49             fourmolu.enable = true;
  50             cabal-fmt.enable = true;
  51           };
  52         };
  53       });
  54     };
  55 }