default.nix

{ stdenv, bundlerEnv, ruby, v8, pkgs, which, python }:
let
  gems = bundlerEnv {
    name = "feedbin-env";
    inherit ruby;
    gemdir = ./.;

    gemConfig = pkgs.defaultGemConfig // {
      libv8 = attrs: {
        buildFlags = [ "--with-system-v8=true" "--with-v8-dir=${v8}" ];
        buildInputs = [ v8 python which ];
        dontBuild = false;
        postPatch = ''
          substituteInPlace ext/libv8/extconf.rb \
            --replace "location = Libv8::Location::Vendor.new" \
                      "location = Libv8::Location::System.new"
        '';
      };
    };
  };
in stdenv.mkDerivation {
  name = "feedbin";
  src = ./.;
  buildInputs = [ gems ruby ];
  installPhase = ''
    mkdir -p $out/{bin,share/feedbin}
    cp -r * $out/share/feedbin
    bin=$out/bin/feedbin
    cat > $bin <<EOF
    #!/bin/sh -e
    exec ${gems}/bin/bundle exec foreman start
    EOF
    chmod +x $bin
  '';
}