{ resholve
, lib
, stdenv
, fetchFromGitHub
, bash
, coreutils
, gnugrep
, ncurses
, findutils
, hostname
, parallel
, flock
, ps
, bats
, lsof
, doInstallCheck ? true
}:

resholve.mkDerivation rec {
  pname = "bats";
  version = "1.6.0";

  src = fetchFromGitHub {
    owner = "bats-core";
    repo = "bats-core";
    rev = "v${version}";
    sha256 = "sha256-s+SAqX70WeTz6s5ObXYFBVPVUEqvD1d7AX2sGHkjVQ4=";
  };

  patchPhase = ''
    patchShebangs .
  '';

  installPhase = ''
    ./install.sh $out
  '';

  solutions = {
    bats = {
      scripts = [
        "bin/bats"
        "libexec/bats-core/*"
        "lib/bats-core/*"
      ];
      interpreter = "${bash}/bin/bash";
      inputs = [
        bash
        coreutils
        gnugrep
        ncurses
        findutils
        hostname
        parallel
        flock
        "lib/bats-core"
        "libexec/bats-core"
      ];
      fake = {
        external = [
          "greadlink"
          "shlock"
        ];
      };
      fix = {
        "$BATS_ROOT" = [ "${placeholder "out"}" ];
        "$BATS_LIBEXEC" = [ "${placeholder "out"}/libexec/bats-core" ];
      };
      keep = {
        "${placeholder "out"}/libexec/bats-core/bats" = true;
        source = [
          "${placeholder "out"}/lib/bats-core/validator.bash"
          "${placeholder "out"}/lib/bats-core/preprocessing.bash"
          "$BATS_TEST_SOURCE"
          "${placeholder "out"}/lib/bats-core/tracing.bash"
          "${placeholder "out"}/lib/bats-core/test_functions.bash"
          "$library_load_path"
          "${placeholder "out"}/lib/bats-core/common.bash"
          "${placeholder "out"}/lib/bats-core/semaphore.bash"
          "${placeholder "out"}/lib/bats-core/formatter.bash"
        ];
        "$report_formatter" = true;
        "$formatter" = true;
        "$pre_command" = true;
        "$BATS_TEST_NAME" = true;
        "${placeholder "out"}/libexec/bats-core/bats-exec-test" = true;
      };
      execer = [
        /*
        both blatant lies for expedience; these can certainly exec args
        they may be safe here, because they may always run things that
        are ultimately in libexec?
        TODO: handle parallel and flock in binlore/resholve
        */
        "cannot:${parallel}/bin/parallel"
        "cannot:${flock}/bin/flock"

        "cannot:libexec/bats-core/bats-preprocess"

        # these do exec, but other internal files
        "cannot:libexec/bats-core/bats-exec-file"
        "cannot:libexec/bats-core/bats-exec-suite"
      ];
    };
  };

  passthru.tests.upstream = bats.unresholved.overrideAttrs (old: {
    name = "${bats.name}-tests";
    installCheckInputs = [
      ncurses
      parallel # skips some tests if it can't detect
      flock # skips some tests if it can't detect
      ps
    ] ++ lib.optionals stdenv.isDarwin [ lsof ];
    inherit doInstallCheck;
    installCheckPhase = ''
      # TODO: cut if https://github.com/bats-core/bats-core/issues/418 allows
      sed -i '/test works even if PATH is reset/a skip "disabled for nix build"' test/bats.bats
      # TODO: cut when https://github.com/bats-core/bats-core/pull/554 allows
      substituteInPlace test/parallel.bats --replace '&& type -p shlock' '|| type -p shlock'

      # skip tests that assume bats `install.sh` will be in BATS_ROOT
      rm test/root.bats

      # test generates file with absolute shebang dynamically
      substituteInPlace test/install.bats --replace \
        "/usr/bin/env bash" "${bash}/bin/bash"

      ${bats}/bin/bats test
      rm -rf $out
      touch $out
    '';
  });

  meta = with lib; {
    homepage = "https://github.com/bats-core/bats-core";
    description = "Bash Automated Testing System";
    maintainers = with maintainers; [ abathur ];
    license = licenses.mit;
    platforms = platforms.unix;
  };
}