nixpkgs-update/flake.nix

{
  description = "A flake for nixpkgs-update";

  inputs.flake-utils.url = "github:numtide/flake-utils";

  inputs.flake-compat = {
    url = "github:edolstra/flake-compat";
    flake = false;
  };

  inputs.nixpkgs = {
    type = "github";
    owner = "nixos";
    repo = "nixpkgs";
  };

  inputs.nixpkgs-review = {
    type = "github";
    owner = "Mic92";
    repo = "nixpkgs-review";
    flake = false;
  };

  outputs = { self, flake-utils, flake-compat, nixpkgs, nixpkgs-review }:
    flake-utils.lib.eachSystem ["x86_64-linux"] (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          config = { allowBroken = true; };
        };

        compiler = pkgs.haskell.packages.ghc884;

        developPackageAttrs = {
          name = "nixpkgs-update";
          root = self;
          overrides = self: super: { };
          source-overrides = { };
          modifier = pkgs.haskell.lib.disableLibraryProfiling;
          returnShellEnv = false;
        };

        developPackageShellAttrs = developPackageAttrs // {
          returnShellEnv = true;
        };

        drvAttrs = attrs: with pkgs; {
          # TODO: lock down coreutils paths too
          NIX = nix;
          GIT = git;
          HUB = gitAndTools.hub;
          JQ = jq;
          TREE = tree;
          GIST = gist;
          NIXPKGSREVIEW = (import nixpkgs-review { inherit pkgs; });
        };

        drvShellAttrs = attrs: (drvAttrs attrs) // (with pkgs; {
          nativeBuildInputs = attrs.nativeBuildInputs ++ [ cabal-install ghcid ];
        });

        pkg = (compiler.developPackage developPackageAttrs).overrideAttrs drvAttrs;

        shell = (compiler.developPackage developPackageShellAttrs).overrideAttrs drvShellAttrs;

      in {
        devShell = shell;
        packages.nixpkgs-update = pkg;
        defaultPackage = pkg;
      });
}