Auto-linking for native modules (source-based)

change/react-native-windows-2020-05-28-13-42-40-autolink.json

@@ -0,0 +1,8 @@
+{
+  "type": "prerelease",
+  "comment": "Auto-linking for native modules (source-based)",
+  "packageName": "react-native-windows",
+  "email": "jthysell@microsoft.com",
+  "dependentChangeType": "patch",
+  "date": "2020-05-28T20:42:40.417Z"
+}

packages/E2ETest/windows/ReactUWPTestApp/App.xaml.cs

@@ -41,6 +41,8 @@ public App()
             InstanceSettings.UseDeveloperSupport = false;
 #endif
 
+            Microsoft.ReactNative.Managed.AutolinkedNativeModules.RegisterAutolinkedNativeModulePackages(PackageProviders); // Includes any autolinked modules
+
             PackageProviders.Add(new Microsoft.ReactNative.Managed.ReactPackageProvider());
             PackageProviders.Add(new ReflectionReactPackageProvider<App>());
             PackageProviders.Add(new TreeDumpLibrary.ReactPackageProvider());

packages/E2ETest/windows/ReactUWPTestApp/AutolinkedNativeModules.g.cs

@@ -0,0 +1,13 @@
+// AutolinkedNativeModules.g.cs contents generated by "react-native autolink-windows"
+
+using System.Collections.Generic;
+
+namespace Microsoft.ReactNative.Managed
+{
+    internal static class AutolinkedNativeModules
+    {
+        internal static void RegisterAutolinkedNativeModulePackages(IList<IReactPackageProvider> packageProviders)
+        { 
+        }
+    }
+}

packages/E2ETest/windows/ReactUWPTestApp/AutolinkedNativeModules.g.targets

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <!-- AutolinkedNativeModules.g.targets contents generated by "react-native autolink-windows" -->
+  <ItemGroup>
+  </ItemGroup>
+</Project>

packages/E2ETest/windows/ReactUWPTestApp/ReactUWPTestApp.csproj

@@ -1,10 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="16.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup Label="ReactNativeWindowsProps">
     <ReactNativeWindowsDir Condition="'$(ReactNativeWindowsDir)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), 'node_modules\react-native-windows\package.json'))\node_modules\react-native-windows\</ReactNativeWindowsDir>
   </PropertyGroup>
-  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CSharpApp.props"/>
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
@@ -125,6 +124,7 @@
     <Compile Include="App.xaml.cs">
       <DependentUpon>App.xaml</DependentUpon>
     </Compile>
+    <Compile Include="AutolinkedNativeModules.g.cs" />
     <Compile Include="MainPage.xaml.cs">
       <DependentUpon>MainPage.xaml</DependentUpon>
     </Compile>
@@ -159,9 +159,6 @@
     <PackageReference Include="Microsoft.NETCore.UniversalWindowsPlatform">
       <Version>6.2.9</Version>
     </PackageReference>
-    <PackageReference Include="Microsoft.UI.Xaml">
-      <Version>2.3.191129002</Version>
-    </PackageReference>
     <PackageReference Include="XamlTreeDump">
       <Version>1.0.3</Version>
     </PackageReference>
@@ -182,5 +179,17 @@
   <PropertyGroup>
     <BundleEntryFile>dist/app/index.js</BundleEntryFile>
   </PropertyGroup>
-  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CSharpApp.targets"/>
+  <ImportGroup Label="ReactNativeWindowsPropertySheets">
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props')" />
+  </ImportGroup>
+  <ImportGroup Label="ReactNativeWindowsTargets">
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureReactNativeWindowsTargets" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references targets in your node_modules\react-native-windows folder. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props'))" />
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets'))" />
+  </Target>
 </Project>

packages/microsoft-reactnative-sampleapps/react-native.config.js

@@ -1,3 +1,16 @@
+// Change the below to true for autolink to target SampleAppCS instead of SampleAppCPP.
+// Then run `npx react-native autolink-windows` to actually run the autolink.
+const targetCS = false;
+
 module.exports = {
   reactNativePath: '../../vnext',
+  project: {
+    windows: {
+      sourceDir: 'windows',
+      solutionFile: 'SampleApps.sln',
+      project: {
+        projectFile: targetCS ? 'SampleAppCS\\SampleAppCS.csproj' : 'SampleAppCPP\\SampleAppCPP.vcxproj',
+      },
+    },
+  },
 };

packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/App.cpp

@@ -2,7 +2,10 @@
 // Licensed under the MIT License.
 
 #include "pch.h"
+
 #include "App.h"
+
+#include "AutolinkedNativeModules.g.h"
 #include <CppWinRTIncludes.h>
 #include <ReactPackageProvider.h>
 #include <ReactPropertyBag.h>
@@ -42,6 +45,8 @@ App::App() noexcept {
   ReactPropertyBag::Set(InstanceSettings().Properties(), ReactPropertyId<int>{L"Prop1"}, 42);
   ReactPropertyBag::Set(InstanceSettings().Properties(), ReactPropertyId<hstring>{L"Prop2"}, L"Hello World!");
 
+  RegisterAutolinkedNativeModulePackages(PackageProviders()); // Includes any autolinked modules
+
   PackageProviders().Append(make<ReactPackageProvider>()); // Includes all modules in this project
   PackageProviders().Append(winrt::SampleLibraryCpp::ReactPackageProvider());
   PackageProviders().Append(winrt::SampleLibraryCS::ReactPackageProvider());

packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/AutolinkedNativeModules.g.cpp

@@ -0,0 +1,13 @@
+// AutolinkedNativeModules.g.cpp contents generated by "react-native autolink-windows"
+// clang-format off
+#include "pch.h"
+#include "AutolinkedNativeModules.g.h"
+
+namespace winrt::Microsoft::ReactNative
+{
+
+void RegisterAutolinkedNativeModulePackages(winrt::Windows::Foundation::Collections::IVector<winrt::Microsoft::ReactNative::IReactPackageProvider> const& packageProviders)
+{ 
+}
+
+}

packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/AutolinkedNativeModules.g.h

@@ -0,0 +1,10 @@
+// AutolinkedNativeModules.g.h contents generated by "react-native autolink-windows"
+#pragma once
+
+// clang-format off
+namespace winrt::Microsoft::ReactNative
+{
+
+void RegisterAutolinkedNativeModulePackages(winrt::Windows::Foundation::Collections::IVector<winrt::Microsoft::ReactNative::IReactPackageProvider> const& packageProviders);
+
+}

packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/AutolinkedNativeModules.g.targets

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <!-- AutolinkedNativeModules.g.targets contents generated by "react-native autolink-windows" -->
+  <ItemGroup>
+  </ItemGroup>
+</Project>

packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/SampleAppCpp.vcxproj

@@ -42,7 +42,7 @@
   <!-- End Custom .NET Native targets -->
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="..\packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.props" Condition="Exists('..\packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.props')" />
-  <PropertyGroup>
+  <PropertyGroup Label="ReactNativeWindowsProps">
     <ReactNativeWindowsDir Condition="'$(ReactNativeWindowsDir)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), 'node_modules\react-native-windows\package.json'))\node_modules\react-native-windows\</ReactNativeWindowsDir>
   </PropertyGroup>
   <ItemGroup Label="ProjectConfigurations">
@@ -102,7 +102,7 @@
     <Import Project="PropertySheet.props" />
   </ImportGroup>
   <ImportGroup Label="ReactNativeWindowsPropertySheets">
-    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CppApp.props"/>
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.props" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.props')" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <ItemDefinitionGroup>
@@ -139,6 +139,7 @@
       <SubType>Code</SubType>
     </ClInclude>
     <ClInclude Include="ReactPackageProvider.h" />
+    <ClInclude Include="AutolinkedNativeModules.g.h" />
     <ClInclude Include="pch.h" />
     <ClInclude Include="App.h">
       <DependentUpon>App.xaml</DependentUpon>
@@ -170,6 +171,7 @@
       <SubType>Code</SubType>
     </ClCompile>
     <ClCompile Include="ReactPackageProvider.cpp" />
+    <ClCompile Include="AutolinkedNativeModules.g.cpp" />
     <ClCompile Include="pch.cpp">
       <PrecompiledHeader>Create</PrecompiledHeader>
     </ClCompile>
@@ -193,9 +195,6 @@
       <DeploymentContent>false</DeploymentContent>
     </Text>
   </ItemGroup>
-  <ItemGroup>
-    <Natvis Include="$(ReactNativeWindowsDir)\Folly\Folly.natvis" />
-  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\SampleLibraryCpp\SampleLibraryCpp.vcxproj">
       <Project>{47eec7f3-40d3-49ba-82c1-eaf103b54215}</Project>
@@ -210,11 +209,20 @@
     </Page>
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ReactNativeWindowsTargets">
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.targets" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureReactNativeWindowsTargets" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references targets in your node_modules\react-native-windows folder. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.props')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.props'))" />
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppApp.targets'))" />
+  </Target>
   <ImportGroup Label="ExtensionTargets">
     <Import Project="..\packages\Microsoft.UI.Xaml.2.3.191129002\build\native\Microsoft.UI.Xaml.targets" Condition="Exists('..\packages\Microsoft.UI.Xaml.2.3.191129002\build\native\Microsoft.UI.Xaml.targets')" />
     <Import Project="..\packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.targets" Condition="Exists('..\packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.targets')" />
   </ImportGroup>
-  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CppApp.targets"/>
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>
       <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>

packages/microsoft-reactnative-sampleapps/windows/SampleAppCPP/SampleAppCpp.vcxproj.filters

@@ -11,12 +11,14 @@
     <ClCompile Include="App.cpp" />
     <ClCompile Include="$(GeneratedFilesDir)module.g.cpp" />
     <ClCompile Include="ReactPackageProvider.cpp" />
+    <ClCompile Include="AutolinkedNativeModules.g.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="pch.h" />
     <ClInclude Include="App.h" />
     <ClInclude Include="DebugConsole.h" />
     <ClInclude Include="ReactPackageProvider.h" />
+    <ClInclude Include="AutolinkedNativeModules.g.h" />
   </ItemGroup>
   <ItemGroup>
     <Image Include="Assets\Wide310x150Logo.scale-200.png">

packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/App.xaml.cs

@@ -42,7 +42,9 @@ public App()
             InstanceSettings.Properties.Set(ReactPropertyBagHelper.GetName(null, "Prop1"), 43);
             InstanceSettings.Properties.Set(ReactPropertyBagHelper.GetName(null, "Prop2"), "Hello RNW!");
 
-            PackageProviders.Add(new ReactPackageProvider()); // Includes any modules in this project
+            Microsoft.ReactNative.Managed.AutolinkedNativeModules.RegisterAutolinkedNativeModulePackages(PackageProviders); // Includes any autolinked modules
+
+            PackageProviders.Add(new Microsoft.ReactNative.Managed.ReactPackageProvider());
             PackageProviders.Add(new ReflectionReactPackageProvider<App>());
             PackageProviders.Add(new SampleLibraryCS.ReactPackageProvider());
             PackageProviders.Add(new SampleLibraryCpp.ReactPackageProvider());

packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/AutolinkedNativeModules.g.cs

@@ -0,0 +1,13 @@
+// AutolinkedNativeModules.g.cs contents generated by "react-native autolink-windows"
+
+using System.Collections.Generic;
+
+namespace Microsoft.ReactNative.Managed
+{
+    internal static class AutolinkedNativeModules
+    {
+        internal static void RegisterAutolinkedNativeModulePackages(IList<IReactPackageProvider> packageProviders)
+        { 
+        }
+    }
+}

packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/AutolinkedNativeModules.g.targets

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <!-- AutolinkedNativeModules.g.targets contents generated by "react-native autolink-windows" -->
+  <ItemGroup>
+  </ItemGroup>
+</Project>

packages/microsoft-reactnative-sampleapps/windows/SampleAppCS/SampleAppCS.csproj

@@ -1,10 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="16.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup Label="ReactNativeWindowsProps">
     <ReactNativeWindowsDir Condition="'$(ReactNativeWindowsDir)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), 'node_modules\react-native-windows\package.json'))\node_modules\react-native-windows\</ReactNativeWindowsDir>
   </PropertyGroup>
-  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CSharpApp.props"/>
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
     <Platform Condition=" '$(Platform)' == '' ">x86</Platform>
@@ -125,6 +124,7 @@
     <Compile Include="App.xaml.cs">
       <DependentUpon>App.xaml</DependentUpon>
     </Compile>
+    <Compile Include="AutolinkedNativeModules.g.cs" />
     <Compile Include="DebugConsole.cs" />
     <Compile Include="MainPage.xaml.cs">
       <DependentUpon>MainPage.xaml</DependentUpon>
@@ -177,5 +177,17 @@
     <VisualStudioVersion>16.0</VisualStudioVersion>
   </PropertyGroup>
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\WindowsXaml\v$(VisualStudioVersion)\Microsoft.Windows.UI.Xaml.CSharp.targets" />
-  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CSharpApp.targets"/>
-</Project>
+  <ImportGroup Label="ReactNativeWindowsPropertySheets">
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props')" />
+  </ImportGroup>
+  <ImportGroup Label="ReactNativeWindowsTargets">
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureReactNativeWindowsTargets" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references targets in your node_modules\react-native-windows folder. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.props'))" />
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CSharpApp.targets'))" />
+  </Target>
+</Project>

packages/microsoft-reactnative-sampleapps/windows/SampleLibraryCPP/SampleLibraryCPP.vcxproj

@@ -17,7 +17,7 @@
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="$(SolutionDir)packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.props" Condition="Exists('$(SolutionDir)packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.props')" />
-  <PropertyGroup>
+  <PropertyGroup Label="ReactNativeWindowsProps">
     <ReactNativeWindowsDir Condition="'$(ReactNativeWindowsDir)' == ''">$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), 'node_modules\react-native-windows\package.json'))\node_modules\react-native-windows\</ReactNativeWindowsDir>
   </PropertyGroup>
   <ItemGroup Label="ProjectConfigurations">
@@ -78,7 +78,7 @@
     <Import Project="PropertySheet.props" />
   </ImportGroup>
   <ImportGroup Label="ReactNativeWindowsPropertySheets">
-    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CppLib.props"/>
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.props" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.props')" />
   </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup />
@@ -159,7 +159,16 @@
     </Page>
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <Import Project="$(ReactNativeWindowsDir)\PropertySheets\external\Microsoft.ReactNative.Uwp.CppLib.targets"/>
+  <ImportGroup Label="ReactNativeWindowsTargets">
+    <Import Project="$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.targets" Condition="Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureReactNativeWindowsTargets" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references targets in your node_modules\react-native-windows folder. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.props')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.props'))" />
+    <Error Condition="!Exists('$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.targets')" Text="$([System.String]::Format('$(ErrorText)', '$(ReactNativeWindowsDir)\PropertySheets\External\Microsoft.ReactNative.Uwp.CppLib.targets'))" />
+  </Target>
   <ImportGroup Label="ExtensionTargets">
     <Import Project="$(SolutionDir)packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.targets" Condition="Exists('$(SolutionDir)packages\Microsoft.Windows.CppWinRT.2.0.200615.7\build\native\Microsoft.Windows.CppWinRT.targets')" />
   </ImportGroup>