frontend.nix

{ pkgs ? import <nixpkgs> {} }: with pkgs;
stdenv.mkDerivation {
 name = "frontend";

 src = ../.;

 buildInputs = [ elmPackages.elm nodejs nodePackages.yarn  ];

 HOME=".";

 patchPhase = ''
   cd frontend
   if [ ! -d "node_modules" ]; then
      yarn
   fi
   patchShebangs node_modules/webpack
 '';

 buildPhase = ''
   if [ -d "dist" ]; then
      rm ./dist -r
   fi
   node node_modules/webpack/bin/webpack.js
 '';

 installPhase = ''
   mkdir $out
   cp -r dist/* $out/
 '';
}