Hacking

On backend

nix-shell -A shells.ghc --run 'cabal new-repl lib:rhyolite-backend'

On frontend

cd frontend
nix-shell .. -A shells.ghc --arg frontend true --run 'cabal new-repl'

Using Rhyolite with Obelisk

Within an already initialized Obelisk project,add to the project's default.nix :

1. fetch rhyolite from GitHub
2. override the packages set and include variables to individual packages of rhyolite
3. In order to use rhyolite-backend you will need to cabal override the following packages:
   1. gargoyle
   2. websockets
   3. websockets-snap

Here is a working example:

{ system ? builtins.currentSystem
, iosSdkVersion ? "10.2"
, enableProfiling ? false
}:
let
  obelisk = import .obelisk/impl { inherit system; };
in
obelisk.project ./. ({ pkgs, ... }:
  let
    rhyolite-src = pkgs.fetchFromGitHub {
      owner = "obsidiansystems";
      repo = "rhyolite";
      rev = "c8456661a6d6fa30efbef7c50394353c13c65e53";
      sha256 = "0s8wmkq2ivr2wj6srp4qx4388ffrqfhhgxyfw42im8vfjyfp83ld";
    };
    gargoyle-src = pkgs.fetchFromGitHub {
      owner = "obsidiansystems";
      repo = "gargoyle";
      rev = "80dfffb22aa399a08559db4191d6d9da8569386d";
      sha256 = "17hhfm20k1d3p1alxgs7dm3nayivr362w3al38mz9v6rab3ywzjc";
     };

    groundhog-src = pkgs.fetchFromGitHub {
      owner = "obsidiansystems";
      repo = "groundhog";
      rev = "c2f18be45e3233f6268c8468eb0732dd6b2e8009";
      sha256 = "1r9i78bsnm6idbvp87gjklnr10g7c83nsbnrffkyrn1wmd7zzqdn";
    };
  in {
    packages = {
      rhyolite-backend-snap = rhyolite-src + /backend-snap;
      rhyolite-common = rhyolite-src + /common;
      rhyolite-frontend = rhyolite-src + /frontend;
      rhyolite-datastructures = rhyolite-src + /datastructures;
      rhyolite-aeson-orphans = rhyolite-src + /aeson-orphans;
      groundhog = groundhog-src + /groundhog;
      groundhog-postgresql = groundhog-src + /groundhog-postgresql;
      groundhog-th = groundhog-src + /groundhog-th;
    };
  overrides = self: super: {
    gargoyle = (self.callCabal2nix "gargoyle" (gargoyle-src + /gargoyle) {});
    gargoyle-postgresql-nix = pkgs.haskell.lib.addBuildTools
    	(self.callCabal2nix "gargoyle-postgresql-nix" (gargoyle-src + /gargoyle-postgresql-nix) {})
      [ pkgs.postgresql ];
    gargoyle-postgresql = (self.callCabal2nix "gargoyle-postgresql" (gargoyle-src + /gargoyle-postgresql) {});

    websockets-obsidian = self.callCabal2nix "websockets-obsidian" (pkgs.fetchFromGitHub {
        owner = "obsidiansystems";
        repo = "websockets";
        rev = "62954d82401a9a2304a14a49973bd8c33db6a8f2";
        sha256 = "1cglrx6pbl5mdgfcsds5w2y1s4i9j375b3xim33jydr5g6c9ss4z";
    }) {};

    websockets-snap = self.callCabal2nix "websockets-snap" (pkgs.fetchFromGitHub {
      owner = "obsidiansystems";
      repo = "websockets-snap";
      rev = "0587aaeab9f9005d45b221c8ccc08b42dde9f900";
      sha256 = "0s07f9sdn98h88kxkv8jr455a559c43c8ybdyvbv5c94ipbz7pjj";
    }) { websockets = self.websockets-obsidian; };

    rhyolite-backend = self.callCabal2nix "rhyolite-backend" (rhyolite-src + /backend) { websockets = self.websockets-obsidian; };

    github = self.callCabal2nix "github" (pkgs.fetchFromGitHub {
       owner="phadej";
       repo="github";
       rev="d1599c6eea1163eb97113e59f72081b88002b534";
       sha256="0a8ndisqmfsf7gaw320ls0ffvk926q8pmcfihd31v25k9qm2i4bi";
    }) {};
  };
    android.applicationId = "systems.obsidian.obelisk.examples.minimal";
    android.displayName = "Obelisk Minimal Example";
    ios.bundleIdentifier = "systems.obsidian.obelisk.examples.minimal";
    ios.bundleName = "Obelisk Minimal Example";
  })