nixpkgs/pkgs/development/mobile/xcodeenv/simulate-app.nix

{stdenv, xcodewrapper}:
{ name, appName ? null, app
, device ? "iPhone", baseDir ? ""
, sdkVersion ? "7.0"
}:

let
  _appName = if appName == null then name else appName;
in
stdenv.mkDerivation {
  name = stdenv.lib.replaceChars [" "] [""] name;
  buildCommand = ''
    ensureDir $out/bin
    cat > $out/bin/run-test-simulator << "EOF"
    #! ${stdenv.shell} -e

    cd "${app}/${baseDir}/${_appName}.app"
    "$(readlink "${xcodewrapper}/bin/iPhone Simulator")" -SimulateApplication './${_appName}' -SimulateDevice '${device}' -currentSDKRoot "$(readlink "${xcodewrapper}/SDKs")/iPhoneSimulator${sdkVersion}.sdk"
    EOF
    chmod +x $out/bin/run-test-simulator
  '';
}