# nix-build  --expr 'with import <nixpkgs> {}; callPackage ./buildroot.nix {}'
{
  pkgs ? import <nixpkgs> {},
  packagName ? "buildroot",
  packageVersion ? "2021.02.7",
  packageSha256 ? "0kdkar2pbd9k0q4i4a87xnqmsdr7njj6mc8x2avvhh9skw2qrg64",
  outputFolder ? "$PWD/.buildroot",
  withXConfig ? false,
  withGConfig ? false,
}:

let


buildRootPath = "usr/src/${packagName}-${packageVersion}";
package = pkgs.stdenv.mkDerivation rec {
  name = "${packagName}";
  version = "${packageVersion}";
  src = pkgs.fetchzip {
    url = "https://buildroot.org/downloads/buildroot-${packageVersion}.tar.gz";
    sha256 = "${packageSha256}";
  };
  phases = [ "unpackPhase" "installPhase" ];
  installPhase = ''
    mkdir -p $out/${buildRootPath}
    cp -R . $out/${buildRootPath}
  '';
};


makeBuildRoot = pkgs.writeShellScriptBin "makeBuildRoot" ''
  BR2_DL_DIR="${outputFolder}/dl" ${pkgs.gnumake}/bin/make O="${outputFolder}" -C "${package}/${buildRootPath}" $@
'';

makeBuildRootScriptPaths = [ pkgs.gnumake];

qtPaths = if withXConfig then [pkgs.qt5.base] else [];
gtkPaths = if withGConfig then [
  pkgs.gtk2.dev 
  pkgs.gtkmm2
  pkgs.gnome2.libglade
  pkgs.glib
  ] else [];
in 
{
    package = package;
    makeBuildRoot = {
      command = makeBuildRoot;
      scriptPaths = makeBuildRootScriptPaths;
      paths = makeBuildRootScriptPaths ++ [
        pkgs.which
        pkgs.pkg-config
        pkgs.ncurses.dev
        pkgs.rsync
        pkgs.bc
        pkgs.unzip
        pkgs.cpio
        pkgs.wget
        pkgs.git
        pkgs.subversion
        pkgs.gnused
        pkgs.file
        pkgs.perl
        pkgs.flock
        pkgs.bash
        pkgs.gnugrep
        pkgs.coreutils-full
        pkgs.binutils
        pkgs.gcc
        pkgs.gnupatch
        pkgs.gzip
        pkgs.bzip2
        pkgs.gnutar
        pkgs.cacert
        pkgs.python3Full
        pkgs.lzma
        pkgs.gdbm
        pkgs.readline

      ] 
      ++ qtPaths
      ++ gtkPaths;
    };
}