arc-theme: move to pkgs/data/themes

pkgs/data/themes/arc/default.nix

@@ -0,0 +1,52 @@
+{ stdenv, fetchFromGitHub, sassc, autoreconfHook, pkgconfig, gtk3, gnome3
+, gtk-engine-murrine, optipng, inkscape }:
+
+stdenv.mkDerivation rec {
+  pname = "arc-theme";
+  version = "20190910";
+
+  src = fetchFromGitHub {
+    owner  = "arc-design";
+    repo   = pname;
+    rev    = version;
+    sha256 = "161kx9ii5ij1503nvhgn3pyqfj7cj03l1di2yf8kwwfczbi4mq3j";
+  };
+
+  nativeBuildInputs = [
+    autoreconfHook
+    pkgconfig
+    sassc
+    optipng
+    inkscape
+    gtk3
+  ];
+
+  propagatedUserEnvPkgs = [
+    gnome3.gnome-themes-extra
+    gtk-engine-murrine
+  ];
+
+  enableParallelBuilding = true;
+
+  preBuild = ''
+    # Shut up inkscape's warnings about creating profile directory
+    export HOME="$NIX_BUILD_ROOT"
+  '';
+
+  configureFlags = [
+    "--with-gnome-shell=${stdenv.lib.versions.majorMinor gnome3.gnome-shell.version}"
+    "--disable-unity"
+  ];
+
+  postInstall = ''
+    install -Dm644 -t $out/share/doc/${pname} AUTHORS *.md
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Flat theme with transparent elements for GTK 3, GTK 2 and Gnome Shell";
+    homepage    = https://github.com/arc-design/arc-theme;
+    license     = licenses.gpl3;
+    maintainers = with maintainers; [ simonvandel romildo ];
+    platforms   = platforms.linux;
+  };
+}