default.nix

{pkgs ? import <nixpkgs> {}}:
with pkgs; let
  inherit
    (import (pkgs.fetchFromGitHub {
      owner = "hercules-ci";
      repo = "gitignore.nix";
      rev = "80463148cd97eebacf80ba68cf0043598f0d7438";
      sha256 = "1l34rmh4lf4w8a1r8vsvkmg32l1chl0p593fl12r28xx83vn150v";
    }) {})
    gitignoreSource
    ;

  nixFilter = name: type: !(lib.hasSuffix ".nix" name);
  srcFilter = src:
    lib.cleanSourceWith {
      filter = nixFilter;
      src = gitignoreSource src;
    };
in
  stdenv.mkDerivation rec {
    name = "immer-git";
    version = "git";
    src = srcFilter ./.;
    nativeBuildInputs = [cmake];
    dontBuild = true;
    dontUseCmakeBuildDir = true;
    cmakeFlags = [
      "-Dimmer_BUILD_TESTS=OFF"
      "-Dimmer_BUILD_EXAMPLES=OFF"
    ];
    meta = {
      homepage = "https://github.com/arximboldi/immer";
      description = "Postmodern immutable data structures for C++";
      license = lib.licenses.boost;
    };
  }