{ stdenv, bundlerEnv, ruby_2_7, callPackage

, pname ? "diaspora"
, version ? import ./version.nix
}:

stdenv.mkDerivation rec {
  inherit pname version;

  diasporaGems = bundlerEnv {
    name = "${pname}-gems-${version}";
    version = version;
    ruby = ruby_2_7;
    gemdir  = callPackage ./source.nix {};
    gemset = ./gemset.nix;
  };

  name = "diaspora";
  src = ./.;
  buildInputs = [diasporaGems ruby];
  installPhase = ''
    mkdir -p $out/{bin,share/diaspora}
    cp -r * $out/share/diaspora
    bin=$out/bin/diaspora
# we are using bundle exec to start in the bundled environment
    cat > $bin <<EOF
#!/bin/sh -e
exec ${diasporaGems}/bin/bundle exec ${ruby}/bin/ruby $out/share/diaspora/diaspora "\$@"
EOF
    chmod +x $bin
  '';
}