gtk.nix

{ config, pkgs, lib, stdenv, fetchFromGitHub, sass, glib, libxml2, gdk-pixbuf
, gtk-engine-murrine, ... }:
let vars = import ./vars.nix;
in {

  nixpkgs.overlays = [
    (self: super: {
      generated-gtk-theme = self.stdenv.mkDerivation rec {
        name = "phocus-gtk-theme";

        src = pkgs.fetchFromGitHub {
          repo = "gtk";
          owner = "phocus";
          rev = "master";
          sha256 = "12mw0kr0kkvg395qlbsvkvaqccr90cmxw5rrsl236zh43kj8grb7";
        };

        buildInputs = [ self.sass self.glib self.libxml2 self.gdk-pixbuf ];

        propagatedUserEnvPkgs = [ self.gtk-engine-murrine ];
        installPhase = ''
          make
        '';

        postPatch = ''
          substituteInPlace Makefile --replace '$(DESTDIR)'/usr $out
          patchShebangs .
        '';

      };
    })
  ];

  # GTK settings
  gtk = {
    enable = true;

    font = { name = "Source Code Pro"; };

    iconTheme = {
      name = "Papirus-Dark";
      package = pkgs.papirus-icon-theme;
    };
    theme = {
      name = "Generated";
      package = pkgs.generated-gtk-theme;
    };
    gtk3.extraConfig.gtk-cursor-theme-name = "breeze";
  };

  home.sessionVariables.GTK_THEME = "Generated";

}