Framework.props

<Project>
  <PropertyGroup>
    <Engines>WindowsDX;WindowsGL;UniversalGL;WindowsXNA</Engines>
    <Games>Ares;TS;YR</Games>
    <OutputPath>$(BaseOutputPath)bin\$(Configuration)\$(Game)\$(Engine)\</OutputPath>
    <IntermediateOutputPath>$(BaseIntermediateOutputPath)obj\$(Configuration)\$(Game)\$(Engine)\</IntermediateOutputPath>
  </PropertyGroup>

  <PropertyGroup>
    <DefineConstants Condition="'$(Configuration.Contains(Debug))'">$(DefineConstants);DEBUG</DefineConstants>

    <!-- Engines -->
    <DefineConstants Condition="'$(Engine)' == 'WindowsDX'">$(DefineConstants);DX;WINFORMS;ISWINDOWS</DefineConstants>
    <DefineConstants Condition="'$(Engine)' == 'WindowsGL'">$(DefineConstants);GL;WINFORMS;ISWINDOWS</DefineConstants>
    <DefineConstants Condition="'$(Engine)' == 'UniversalGL'">$(DefineConstants);GL</DefineConstants>
    <DefineConstants Condition="'$(Engine)' == 'UniversalGL' And $([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'windows'">$(DefineConstants);ISWINDOWS</DefineConstants>
    <DefineConstants Condition="'$(Engine)' == 'WindowsXNA'">$(DefineConstants);XNA;WINFORMS;ISWINDOWS</DefineConstants>

    <!-- Games-->
    <DefineConstants Condition="'$(Game)' == 'Ares'">$(DefineConstants);ARES</DefineConstants>
    <DefineConstants Condition="'$(Game)' == 'TS'">$(DefineConstants);TS</DefineConstants>
    <DefineConstants Condition="'$(Game)' == 'YR'">$(DefineConstants);YR</DefineConstants>
  </PropertyGroup>

  <Target Name="CheckEngineAndGame" BeforeTargets="CoreCompile">
    <Error Text="Engine is not set! Please retry with /p:Engine={Engine}. Supported Engines are $(Engines)." Condition=" '$(Engine)' == '' " />
    <Error Text="Engine '$(Engine)' is not supported. Supported Engines are $(Engines)." Condition=" '!$(Engines.Contains($(Engine)))' " />

    <Error Text="Game is not set! Please retry with /p:Game={Game}. Supported Games are $(Games)." Condition=" '$(Game)' == '' " />
    <Error Text="Game '$(Game)' is not supported. Supported Games are $(Games)." Condition=" '!$(Games.Contains($(Game)))' " />
  </Target>
</Project>