# SPDX-License-Identifier: CC0-1.0

{ stdenv, buildPackages, fetchgit, base, os, pkgconfig, tup }:

let
  tupArch = with stdenv.targetPlatform;
    if isAarch32 then "arm" else
    if isAarch64 then "arm64" else
    if isx86_32 then "i386" else
    if isx86_64 then "x86_64" else
    abort "unhandled targetPlatform";

  toTupConfig = attrs:
    with builtins;
    let op = config: name: "${config}CONFIG_${name}=${getAttr name attrs} ";
    in foldl' op "" (attrNames attrs);

in stdenv.mkDerivation rec {
  name = "nic_bus";
  version = "1.0";
  src = fetchgit {
    url = "https://git.sr.ht/~ehmry/nic_bus";
    rev = "76881b4fbb99e9a995d1f35a33529ff8f38c89bc";
    sha256 = "08fcbfnlg0ljbgv95yd5q70c7xa0sg2k0njv4ygancs7d7f7q4bb";
  };

  nativeBuildInputs = [ pkgconfig tup ];

  buildInputs = [ base os ];

  tupConfig = toTupConfig {
    TUP_ARCH = tupArch;
    VERSION = version;
  };

  configurePhase = ''
    cp -v ${base.src}/Tuprules.tup .

    # Configure Tup
    echo $tupConfig | tr ' CONFIG_' '\nCONFIG_' > tup.config
    echo CONFIG_NIX_OUTPUTS_OUT=$out >> tup.config
    echo CONFIG_NIX_OUTPUTS_DEV=$dev >> tup.config

    # Scan repository and generate script
    tup init
    tup generate buildPhase.sh

    # Redirect artifacts to Nix store
    mkdir -p $out
    ln -s $out out
  '';

  buildPhase = ''
    test -d repos/$repo/src/ld && cp -rv repos/$repo/src/ld $dev/
    pushd .
    set -v
    source buildPhase.sh
    set +v
    popd
  '';

  dontInstall = true;

  meta = with stdenv.lib; {
    license = licenses.agpl3;
    maintainers = [ maintainers.ehmry ];
  };

}