Add haskell package 'taffybar'

pkgs/applications/misc/taffybar/default.nix

@@ -0,0 +1,25 @@
+{ cabal, cairo, dbus, dyre, filepath, gtk, gtkTraymanager
+, HStringTemplate, HTTP, mtl, network, parsec, split, stm, text
+, time, transformers, utf8String, X11, xdgBasedir, xmonad
+, xmonadContrib
+}:
+
+cabal.mkDerivation (self: {
+  pname = "taffybar";
+  version = "0.3.0";
+  sha256 = "02vpfbwfprca997ykk746ih7id0ls3i5pnb33gj3nrfgc59fkz7v";
+  isLibrary = true;
+  isExecutable = true;
+  buildDepends = [
+    cairo dbus dyre filepath gtk gtkTraymanager HStringTemplate HTTP
+    mtl network parsec split stm text time transformers utf8String X11
+    xdgBasedir xmonad xmonadContrib
+  ];
+  pkgconfigDepends = [ gtk ];
+  meta = {
+    homepage = "http://github.com/travitch/taffybar";
+    description = "A desktop bar similar to xmobar, but with more GUI";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})

pkgs/top-level/haskell-packages.nix

@@ -2769,6 +2769,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
     QuickCheck = self.QuickCheck2;
   };
 
+  taffybar = callPackage ../applications/misc/taffybar {};
+
   yi = callPackage ../applications/editors/yi/yi.nix {};
 
   yiContrib = callPackage ../applications/editors/yi/yi-contrib.nix {};