Add back the nethost archive.

eng/Subsets.props

@@ -259,7 +259,7 @@
   <ItemGroup Condition="$(_subset.Contains('+mono.corelib+'))">
     <ProjectToBuild Include="$(MonoProjectRoot)System.Private.CoreLib\System.Private.CoreLib.csproj" Category="mono" />
   </ItemGroup>
-  
+
   <ItemGroup Condition="$(_subset.Contains('+mono.workloads+'))">
     <ProjectToBuild Include="$(WorkloadsProjectRoot)\workloads.csproj" Category="mono" />
   </ItemGroup>
@@ -330,6 +330,7 @@
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\sfx\installers\dotnet-host.proj" />
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\sfx\installers\dotnet-hostfxr.proj" />
         <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\sfx\installers\dotnet-runtime-deps\*.proj" />
+        <SharedFrameworkProjectToBuild Condition="'$(RuntimeFlavor)' == '$(PrimaryRuntimeFlavor)'" Include="$(InstallerProjectRoot)pkg\archives\dotnet-nethost.proj" />
         <SharedFrameworkProjectToBuild Condition="'$(MonoCrossAOTTargetOS)' != ''" Include="$(InstallerProjectRoot)pkg\sfx\Microsoft.NETCore.App\monocrossaot.sfxproj" Pack="true" />
       </ItemGroup>
       <ItemGroup>

src/installer/pkg/archives/Directory.Build.props

@@ -0,0 +1,7 @@
+<Project>
+  <PropertyGroup>
+    <EnsureRuntimeIdentifierSet>true</EnsureRuntimeIdentifierSet>
+  </PropertyGroup>
+
+  <Import Project="$([MSBuild]::GetPathOfFileAbove(Directory.Build.props, $(MSBuildThisFileDirectory)..))" />
+</Project>

src/installer/pkg/archives/dotnet-nethost.proj

@@ -0,0 +1,40 @@
+<Project Sdk="Microsoft.Build.NoTargets">
+  <PropertyGroup>
+	<!-- When KeepNativeSymbols is set, debug symbols are kept in the .so files. So when it is true, we don't need a symbols archive. -->
+    <CreateSymbolsArchive Condition="'$(KeepNativeSymbols)' != 'true'">true</CreateSymbolsArchive>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.DotNet.Build.Tasks.Archives" Version="$(MicrosoftDotNetBuildTasksArchivesVersion)" />
+  </ItemGroup>
+
+  <Target Name="PublishToDisk">
+    <Error Condition="'$(OutputPath)' == ''" Text="Publishing to disk requires the OutputPath to be set to the root of the path to write to." />
+
+    <ItemGroup>
+      <FilesToPublish Include="$(DotNetHostBinDir)\$(LibPrefix)nethost$(LibSuffix)"
+            Destination="$(OutputPath)$(LibPrefix)nethost$(LibSuffix)" />
+      <FilesToPublish Include="$(DotNetHostBinDir)\$(StaticLibPrefix)nethost$(StaticLibSuffix)"
+            Destination="$(OutputPath)$(StaticLibPrefix)nethost$(StaticLibSuffix)" />
+      <FilesToPublish Condition="'$(TargetsWindows)' == 'true'"
+            Include="$(DotNetHostBinDir)\nethost.lib"
+            Destination="$(OutputPath)$(LibPrefix)nethost.lib" />
+      <FilesToPublish Include="$(DotNetHostBinDir)\nethost.h"
+            Destination="$(OutputPath)$(LibPrefix)nethost.h" />
+    </ItemGroup>
+
+    <Copy SourceFiles="@(FilesToPublish)"
+          DestinationFiles="%(FilesToPublish.Destination)" />
+  </Target>
+
+  <Target Name="PublishSymbolsToDisk">
+    <Error Condition="'$(SymbolsOutputPath)' == ''" Text="Publishing to disk requires the SymbolsOutputPath to be set to the root of the path to write to." />
+
+    <Copy SourceFiles="$(DotNetHostBinDir)\PDB\$(LibPrefix)nethost$(SymbolsSuffix);$(DotNetHostBinDir)\PDB\$(StaticLibPrefix)nethost$(SymbolsSuffix)"
+          Condition="'$(TargetsWindows)' == 'true'"
+          DestinationFolder="$(SymbolsOutputPath)" />
+    <Copy SourceFiles="$(DotNetHostBinDir)\$(LibPrefix)nethost$(LibSuffix)$(SymbolsSuffix)"
+          Condition="'$(TargetsWindows)' != 'true'"
+          DestinationFolder="$(SymbolsOutputPath)" />
+  </Target>
+</Project>