add frontend (boilerplate)

default.nix

@@ -2,22 +2,40 @@
 , sources ? import ./nix/sources.nix
 }:
 let
-  haskellPackages = pkgs.haskellPackages.override {
+  haskellPackages = pkgs.haskell.packages.ghc98.override {
     overrides = self: super: {
-      acms = self.callCabal2nix "acms" ./. { };
       astore = self.callCabal2nix "astore" sources.json2sql { };
       autotypes = self.callCabal2nix "autotypes" ./autotypes { };
-      json2sql = self.callCabal2nix "json2sql" sources.json2sql { };
+      backend = self.callCabal2nix "backend" ./backend { };
+      frontend = self.callCabal2nix "frontend" ./frontend { };
+      websockets = pkgs.haskell.lib.doJailbreak super.websockets;
+    };
+  };
+
+  jsHaskellPackages = pkgs.pkgsCross.ghcjs.haskell.packages.ghc98.override {
+    overrides = self: super: {
+      frontend = self.callCabal2nix "frontend" ./frontend { };
     };
   };
 in
 rec {
-  inherit (haskellPackages) acms;
+  inherit (haskellPackages) backend;
+  inherit (jsHaskellPackages) frontend;
   shell = haskellPackages.shellFor {
-    packages = _: [ acms haskellPackages.autotypes ];
+    packages = _: [
+      haskellPackages.autotypes
+      haskellPackages.backend
+      haskellPackages.frontend
+    ];
     buildInputs = [
       haskellPackages.cabal-install
       haskellPackages.ormolu
+      (pkgs.writeScriptBin "reload" ''
+        set -efu
+        ${haskellPackages.ghcid.bin}/bin/ghcid -c \
+          '${haskellPackages.cabal-install}/bin/cabal new-repl' \
+          -T ':run Main.main'
+      '')
     ];
     withHoogle = true;
     withHaddock = true;