Gs/factor out colors use new classh

.gitignore

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+dist-newstyle/

default.nix

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+{ mkDerivation, base, ClasshSS, containers, data-default, filepath
+, lens, lib, reflex-classhss, reflex-dom-core, text
+}:
+mkDerivation {
+  pname = "templates";
+  version = "0.1.0.0";
+  src = ./.;
+  libraryHaskellDepends = [
+    base ClasshSS containers data-default filepath lens reflex-classhss
+    reflex-dom-core text
+  ];
+  description = "Ace templates library";
+  license = lib.licenses.bsd3;
+}

shell.nix

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+{ nixpkgs ? import <nixpkgs> {}, compiler ? "default", doBenchmark ? false }:
+
+let
+  inherit (nixpkgs) pkgs;
+  haskellPackages = if compiler == "default"
+                       then pkgs.haskellPackages
+                       else pkgs.haskell.packages.${compiler};
+
+  variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;
+
+  # Override haskellPackages to use local versions
+  haskellPackages' = haskellPackages.override {
+    overrides = self: super: {
+      ClasshSS = self.callCabal2nix "ClasshSS" ../ClasshSS-dev {};
+      reflex-classhss = self.callCabal2nix "reflex-classhss" ../reflex-classh {};
+    };
+  };
+
+  templates = import ./default.nix;
+  drv = variant (haskellPackages'.callPackage templates {});
+in
+pkgs.mkShell {
+  buildInputs = [ pkgs.cabal-install ];
+  inputsFrom = [ (if pkgs.lib.inNixShell then drv.env else drv) ];
+}