notion: init at 3-2015061300

The notion (not-ion) window manager [1], plus optional (defaulted to
true) Xft/pango support (via [2]). Defined a license (notion uses a
modified LGPL).

As per [3], changes:

  1. renamed option from pango -> xft, better to reflect the actual
     nature of the patch;
  2. modified the patch to replace the postPatch changes to system-autodeteck.mk;
  3. commited the patch to the nixpkgs repo;
  4. removed 'fallbackFont' as an option. Use a sensible default, instead.

Many stylistic changes, thanks to @lethalman.

[1] http://notion.sourceforge.net
[2] http://sourceforge.net/p/notion/feature-requests/47/
[3] https://github.com/NixOS/nixpkgs/pull/8789

pkgs/applications/window-managers/notion/default.nix

@@ -0,0 +1,33 @@
+{
+  enableXft ? true, libXft ? null,
+  patches ? [],
+  stdenv, fetchurl,
+  lua, gettext, groff,
+  pkgconfig, busybox,
+  x11, libXinerama, libXrandr, libX11
+}:
+
+assert enableXft -> libXft != null;
+
+stdenv.mkDerivation {
+  name     = "notion";
+  version  = "3-2015061300";
+  meta = with stdenv.lib; {
+    description = "Tiling tabbed window manager, follow-on to the ion window manager";
+    homepage = http://notion.sourceforge.net;
+    platforms = platforms.linux;
+    license   = licenses.notion_lgpl;
+    maintainers = [maintainers.jfb];
+  };
+  src = fetchurl {
+    url = https://github.com/raboof/notion/archive/3-2015061300.tar.gz;
+    sha256 = "3c9d9f35a9fb0d17c263b76fe28f7a1a4a05b7d6140545524cc1effd98c5c305";
+  };
+
+  patches = patches ++ stdenv.lib.optional enableXft ./notion-xft_nixos.diff;
+  postPatch = "substituteInPlace system-autodetect.mk --replace '#PRELOAD_MODULES=1' 'PRELOAD_MODULES=1'";
+  buildInputs = [x11 lua gettext groff pkgconfig busybox libXinerama libXrandr libX11] ++ stdenv.lib.optional enableXft libXft;
+
+  buildFlags = "LUA_DIR=${lua} X11_PREFIX=/no-such-path PREFIX=\${out}";
+  installFlags = "PREFIX=\${out}";
+}