nix: added release.nix

release.nix

@@ -0,0 +1,46 @@
+let
+  sources = import ./nix/sources.nix;
+in
+{ compiler ? "ghc883"
+, pkgs ? import sources.nixpkgs { }
+}:
+
+let
+  inherit (pkgs.lib.trivial) flip pipe;
+  inherit (pkgs.haskell.lib) appendPatch appendConfigureFlags;
+
+  haskellPackages = pkgs.haskell.packages.${compiler}.override {
+    overrides = hpNew: hpOld: {
+      hakyll =
+        pipe
+           hpOld.hakyll
+           [ (flip appendPatch ./hakyll.patch)
+             (flip appendConfigureFlags [ "-f" "watchServer" "-f" "previewServer" ])
+           ];
+
+      jfdic-web = hpNew.callCabal2nix "jfdic-web" ./. { };
+
+      niv = import sources.niv { };
+    };
+  };
+
+  project = haskellPackages.jfdic-web;
+in
+{
+  project = project;
+
+  shell = haskellPackages.shellFor {
+    packages = p: with p; [
+      project
+    ];
+    #buildInputs = with haskellPackages; [
+    #  ghcid
+    #  hlint       # or ormolu
+    #  niv
+    #  pkgs.cacert # needed for niv
+    #  pkgs.nix    # needed for niv
+    #  zlib
+    #];
+    withHoogle = true;
+  };
+}