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     #symantic-base.url = "git+https://git.code.sourcephile.fr/~julm/symantic-base?ref=main";
   7     symantic-base.url = "git://git.sourcephile.fr/haskell/symantic-base";
   8     symantic-base.inputs.nixpkgs.follows = "nixpkgs";
   9     url-slug.url = "github:srid/url-slug";
  10     url-slug.inputs.nixpkgs.follows = "nixpkgs";
  11   };
  12   outputs = inputs:
  13     let
  14       pkg = "webc";
  15       lib = inputs.nixpkgs.lib;
  16       forAllSystems = f: lib.genAttrs lib.systems.flakeExposed (system: f rec {
  17         inherit system;
  18         pkgs = inputs.nixpkgs.legacyPackages.${system};
  19         haskellPackages = pkgs.haskellPackages.extend (with pkgs.haskell.lib; hfinal: hsuper: {
  20           ${pkg} = buildFromSdist (hfinal.callCabal2nix pkg ./. { });
  21           symantic-base = buildFromSdist (hfinal.callCabal2nix "symantic-base" inputs.symantic-base { });
  22           url-slug = buildFromSdist (hfinal.callCabal2nix "url-slug" inputs.url-slug { });
  23         });
  24       });
  25     in
  26     rec {
  27       # nix -L build
  28       defaultPackage = forAllSystems ({ haskellPackages, ... }: haskellPackages.${pkg});
  29       # nix -L develop  or  direnv allow
  30       devShell = forAllSystems ({ pkgs, haskellPackages, system, ... }:
  31         haskellPackages.shellFor {
  32           packages = ps: [ ps.${pkg} ];
  33           nativeBuildInputs = [
  34             haskellPackages.cabal-install
  35             haskellPackages.ghcid
  36             haskellPackages.haskell-language-server
  37             haskellPackages.hlint
  38             pkgs.git-chglog
  39             pkgs.reuse
  40           ];
  41           withHoogle = false;
  42           inherit (checks.${system}.pre-commit-check) shellHook;
  43         });
  44       # nix flake check
  45       checks = forAllSystems (args: with args; {
  46         pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
  47           src = ./.;
  48           #settings.ormolu.cabalDefaultExtensions = true;
  49           settings.ormolu.defaultExtensions = [
  50             "ImportQualifiedPost"
  51             "TypeApplications"
  52           ];
  53           hooks = {
  54             hlint.enable = true;
  55             nixpkgs-fmt.enable = true;
  56             fourmolu.enable = true;
  57             cabal-fmt.enable = true;
  58           };
  59         };
  60       });
  61     };
  62 }