Require package readmes for shipping packages

eng/packaging.targets

@@ -20,7 +20,12 @@
     <!-- Don't treat the TPM as an input to APICompat PackageValidation's reference assembly calculation. -->
     <ApiCompatIgnoreTargetPlatformMoniker Condition="'$(SuppressDependenciesWhenPacking)' == 'true'">true</ApiCompatIgnoreTargetPlatformMoniker>
     <PackageDesignerMarkerFile>$(MSBuildThisFileDirectory)useSharedDesignerContext.txt</PackageDesignerMarkerFile>
-    <PackageReadmeFile Condition="'$(PackageReadmeFile)' == '' and Exists('PACKAGE.md')">PACKAGE.md</PackageReadmeFile>
+
+    <!-- PackageReadmeFile specifies the package readme file name in the package. PackageReadmeFilePath points to the package readme file on disk. -->
+    <PackageReadmeFile Condition="'$(PackageReadmeFile)' == '' and '$(EnableDefaultPackageReadmeFile)' == 'true'">PACKAGE.md</PackageReadmeFile>
+    <PackageReadmeFilePath Condition="'$(PackageReadmeFilePath)' == '' and '$(EnableDefaultPackageReadmeFile)' == 'true'">PACKAGE.md</PackageReadmeFilePath>
+    <BeforePack>$(BeforePack);ValidatePackageReadmeExists</BeforePack>
+
     <!-- Non-shipping packages shouldn't incrementally serviced. -->
     <PackageUseIncrementalServicingVersion Condition="'$(IsShipping)' != 'true'">false</PackageUseIncrementalServicingVersion>
     <!-- Generate packages for rid specific projects or for allconfigurations during build. -->
@@ -83,9 +88,9 @@
                                   TargetFramework="$(NetFrameworkMinimum)" />
   </ItemGroup>
 
-  <!-- Add a package README file from. -->
-  <ItemGroup Condition="'$(PackageReadmeFile)' != ''">
-    <None Include="$(PackageReadmeFile)" Pack="true" PackagePath="\" />
+  <!-- Add a package README file -->
+  <ItemGroup Condition="'$(PackageReadmeFilePath)' != ''">
+    <None Include="$(PackageReadmeFilePath)" Pack="true" PackagePath="\" />
   </ItemGroup>
 
   <Choose>
@@ -312,4 +317,10 @@
     <Error Condition="'$(ServicingVersion)' == '0'" Text="ServicingVersion is set to 0 and it should be an increment of the patch version from the last released package." />
   </Target>
 
+  <Target Name="ValidatePackageReadmeExists"
+          Condition="'$(PackageReadmeFilePath)' != '' and
+                     !Exists('$(PackageReadmeFilePath)')">
+    <Error Text="$(PackageId) is a shipping package and is missing a required package README file. Add a 'PACKAGE.md' file into to the source project folder." />
+  </Target>
+
 </Project>

src/libraries/Directory.Build.targets

@@ -126,6 +126,9 @@
                                                 '$(IsTestProject)' != 'true' and
                                                 '$(IsTestSupportProject)' != 'true' and
                                                 '$(IsGeneratorProject)' != 'true'">true</SkipTargetingPackShimReferences>
+
+    <!-- Make libraries packages use and require a package readme file. -->
+    <EnableDefaultPackageReadmeFile Condition="'$(EnableDefaultPackageReadmeFile)' == '' and '$(IsShipping)' == 'true'">true</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <Import Project="$(RepositoryEngineeringDir)codeOptimization.targets" />

src/libraries/Microsoft.Bcl.Memory/src/Microsoft.Bcl.Memory.csproj

@@ -18,6 +18,8 @@
       System.Index
       System.Range
     </PackageDescription>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <!-- DesignTimeBuild requires all the TargetFramework Derived Properties to not be present in the first property group. -->

src/libraries/Microsoft.Extensions.DependencyInjection.Specification.Tests/src/Microsoft.Extensions.DependencyInjection.Specification.Tests.csproj

@@ -15,6 +15,8 @@
     <PackageDescription>Suite of xUnit.net tests to check for container compatibility with Microsoft.Extensions.DependencyInjection.</PackageDescription>
     <!-- this assembly doesn't need to be binplaced -->
     <EnableBinPlacing>false</EnableBinPlacing>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.Extensions.Diagnostics.Abstractions/src/Microsoft.Extensions.Diagnostics.Abstractions.csproj

@@ -17,6 +17,8 @@ Microsoft.Extensions.Diagnostics.Metrics.InstrumentRule
 Microsoft.Extensions.Diagnostics.Metrics.MeterScope
 Microsoft.Extensions.Diagnostics.Metrics.MetricsBuilderExtensions
 Microsoft.Extensions.Diagnostics.Metrics.MetricsOptions</PackageDescription>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.Extensions.Diagnostics/src/Microsoft.Extensions.Diagnostics.csproj

@@ -9,6 +9,8 @@
     <DisablePackageBaselineValidation>true</DisablePackageBaselineValidation>
     <IsPackable>true</IsPackable>
     <PackageDescription>This package includes the default implementation of IMeterFactory and additional extension methods to easily register it with the Dependency Injection framework.</PackageDescription>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.Extensions.FileProviders.Composite/src/Microsoft.Extensions.FileProviders.Composite.csproj

@@ -6,6 +6,8 @@
     <EnableDefaultItems>true</EnableDefaultItems>
     <IsPackable>true</IsPackable>
     <PackageDescription>Composite file and directory providers for Microsoft.Extensions.FileProviders.</PackageDescription>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.Extensions.Logging.Configuration/src/Microsoft.Extensions.Logging.Configuration.csproj

@@ -7,6 +7,8 @@
     <EnableConfigurationBindingGenerator>true</EnableConfigurationBindingGenerator>
     <IsPackable>true</IsPackable>
     <PackageDescription>Configuration support for Microsoft.Extensions.Logging.</PackageDescription>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.Extensions.Logging.EventLog/src/Microsoft.Extensions.Logging.EventLog.csproj

@@ -5,6 +5,8 @@
     <EnableDefaultItems>true</EnableDefaultItems>
     <IsPackable>true</IsPackable>
     <PackageDescription>Windows Event Log logger provider implementation for Microsoft.Extensions.Logging.</PackageDescription>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.Extensions.Logging.EventSource/src/Microsoft.Extensions.Logging.EventSource.csproj

@@ -6,6 +6,8 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IsPackable>true</IsPackable>
     <PackageDescription>EventSource/EventListener logger provider implementation for Microsoft.Extensions.Logging.</PackageDescription>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.NET.WebAssembly.Threading/src/Microsoft.NET.WebAssembly.Threading.proj

@@ -12,6 +12,8 @@
     <NoWarn>$(NoWarn);NU5128;NU5131;PKV004</NoWarn>
     <!-- Place assemblies in the nuget ref folder -->
     <BuildOutputTargetFolder>ref</BuildOutputTargetFolder>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>

src/libraries/Microsoft.XmlSerializer.Generator/src/Microsoft.XmlSerializer.Generator.csproj

@@ -1,4 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
     <AssemblyName>dotnet-Microsoft.XmlSerializer.Generator</AssemblyName>
@@ -16,6 +17,8 @@
     <!-- this assembly doesn't need to be binplaced -->
     <EnableBinPlacing>false</EnableBinPlacing>
     <IsTrimmable>false</IsTrimmable>
+    <!-- TODO: Add package README file: https://github.com/dotnet/runtime/issues/99358 -->
+    <EnableDefaultPackageReadmeFile>false</EnableDefaultPackageReadmeFile>
   </PropertyGroup>
 
   <ItemGroup>