Remove dependencies on non-live illink

eng/Analyzers.targets

@@ -13,8 +13,9 @@
   </PropertyGroup>
   <PropertyGroup Condition="'$(RunAnalyzers)' != 'false'">
     <EnableSingleFileAnalyzer Condition="
-      '$(EnableSingleFileAnalyzer)' == '' And
-      '$(TargetFrameworkIdentifier)' == '.NETCoreApp'">true</EnableSingleFileAnalyzer>
+      '$(EnableSingleFileAnalyzer)' == '' and
+      '$(TargetFrameworkIdentifier)' == '.NETCoreApp' and
+      '$(IsSourceProject)' == 'true'">true</EnableSingleFileAnalyzer>
   </PropertyGroup>
   <ItemGroup Condition="'$(RunAnalyzers)' != 'false'">
     <EditorConfigFiles Include="$(MSBuildThisFileDirectory)CodeAnalysis.src.globalconfig" />

eng/Version.Details.xml

@@ -314,10 +314,6 @@
       <Sha>736dabeca728ccf8b911d96d1b4c575b4d0db7d2</Sha>
       <SourceBuild RepoName="runtime" ManagedOnly="false" />
     </Dependency>
-    <Dependency Name="Microsoft.NET.ILLink.Tasks" Version="9.0.0-alpha.1.23470.17">
-      <Uri>https://github.com/dotnet/runtime</Uri>
-      <Sha>736dabeca728ccf8b911d96d1b4c575b4d0db7d2</Sha>
-    </Dependency>
     <Dependency Name="Microsoft.DotNet.ILCompiler" Version="9.0.0-alpha.1.23470.17">
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>736dabeca728ccf8b911d96d1b4c575b4d0db7d2</Sha>

eng/Versions.props

@@ -205,8 +205,6 @@
     <CompilerPlatformTestingVersion>1.1.2-beta1.23323.1</CompilerPlatformTestingVersion>
     <!-- Docs -->
     <MicrosoftPrivateIntellisenseVersion>8.0.0-preview-20230918.1</MicrosoftPrivateIntellisenseVersion>
-    <!-- ILLink -->
-    <MicrosoftNETILLinkTasksVersion>9.0.0-alpha.1.23470.17</MicrosoftNETILLinkTasksVersion>
     <!-- Mono Cecil -->
     <MicrosoftDotNetCecilVersion>0.11.4-alpha.23476.1</MicrosoftDotNetCecilVersion>
     <!-- ILCompiler -->

eng/illink.targets

@@ -1,37 +1,13 @@
 <Project>
 
   <PropertyGroup>
-    <_ILLinkTasksSourceDir>$(ToolsProjectRoot)illink\src\ILLink.Tasks\</_ILLinkTasksSourceDir>
-    <ILLinkAnalyzersPropsPath>$(ToolsProjectRoot)illink\src\ILLink.RoslynAnalyzer\build\Microsoft.NET.ILLink.Analyzers.props</ILLinkAnalyzersPropsPath>
+    <!-- Custom trimming logic should always use live ILLink, even when none of the
+         trimming-related SDK properties are set. -->
+    <_RequiresLiveILLink>true</_RequiresLiveILLink>
   </PropertyGroup>
 
-  <ItemGroup>
-    <!-- The assembly shouldn't be referenced, nor promoted to a package dependency, nor copied to the output directory. -->
-    <ProjectReference Include="$(_ILLinkTasksSourceDir)ILLink.Tasks.csproj"
-                      ReferenceOutputAssembly="false"
-                      PrivateAssets="all"
-                      Private="false"
-                      SetConfiguration="Configuration=$(ToolsConfiguration)">
-        <!-- Keep TFMs in sync with ILLink.Tasks.csproj -->
-        <SetTargetFramework Condition="'$(MSBuildRuntimeType)' == 'Core'">TargetFramework=$(NetCoreAppToolCurrent)</SetTargetFramework>
-        <SetTargetFramework Condition="'$(MSBuildRuntimeType)' != 'Core'">TargetFramework=$(NetFrameworkToolCurrent)</SetTargetFramework>
-    </ProjectReference>
-  </ItemGroup>
-
-  <Import Project="$(_ILLinkTasksSourceDir)build\Microsoft.NET.ILLink.Tasks.props" />
-
   <PropertyGroup>
     <IsTrimmable Condition="'$(IsTrimmable)' == ''">true</IsTrimmable>
-    <!-- Don't use SDK's trimming functionality.
-         Once we have an SDK with
-         https://github.com/dotnet/sdk/commit/bdce224bba472ccad4bade07b757ac5275040c0e
-         and
-         https://github.com/dotnet/sdk/commit/f051b536cc12190488231f3a889df44214c1bc2e,
-         we might be able to use built-in functionality instead of a packagereference.
-         -->
-    <_RequiresILLinkPack>false</_RequiresILLinkPack>
-    <ILLinkTasksAssembly Condition="'$(MSBuildRuntimeType)' == 'Core'">$(ToolsILLinkDir)$(NetCoreAppToolCurrent)\ILLink.Tasks.dll</ILLinkTasksAssembly>
-    <ILLinkTasksAssembly Condition="'$(MSBuildRuntimeType)' != 'Core'">$(ToolsILLinkDir)$(NetFrameworkToolCurrent)\ILLink.Tasks.dll</ILLinkTasksAssembly>
     <PrepareResourcesDependsOn>_EmbedILLinkXmls;$(PrepareResourcesDependsOn)</PrepareResourcesDependsOn>
     <TargetsTriggeredByCompilation Condition="'$(DesignTimeBuild)' != 'true'">$(TargetsTriggeredByCompilation);ILLinkTrimAssembly</TargetsTriggeredByCompilation>
 

eng/liveILLink.targets

@@ -0,0 +1,44 @@
+<Project>
+
+  <!-- NOTE: these targets should be a no-op, unless _RequiresLiveILLink, computed below, is true. -->
+
+  <PropertyGroup>
+    <!-- Keep these conditions in sync with _RequiresILLinkPack in
+         https://github.com/dotnet/sdk/blob/main/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Publish.targets -->
+    <_RequiresLiveILLink Condition="'$(_RequiresLiveILLink)' == '' And (
+        '$(PublishAot)' == 'true' Or
+        '$(IsAotCompatible)' == 'true' Or '$(EnableAotAnalyzer)' == 'true' Or
+        '$(PublishTrimmed)' == 'true' Or
+        '$(IsTrimmable)' == 'true' Or '$(EnableTrimAnalyzer)' == 'true' Or
+        '$(EnableSingleFileAnalyzer)' == 'true')">true</_RequiresLiveILLink>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(_RequiresLiveILLink)' == 'true'">
+    <_ILLinkTasksSourceDir>$(ToolsProjectRoot)illink\src\ILLink.Tasks\</_ILLinkTasksSourceDir>
+    <ILLinkAnalyzersPropsPath>$(ToolsProjectRoot)illink\src\ILLink.RoslynAnalyzer\build\Microsoft.NET.ILLink.Analyzers.props</ILLinkAnalyzersPropsPath>
+  </PropertyGroup>
+
+  <Import Project="$(_ILLinkTasksSourceDir)build\Microsoft.NET.ILLink.Tasks.props" Condition="'$(_RequiresLiveILLink)' == 'true'" />
+
+  <PropertyGroup Condition="'$(_RequiresLiveILLink)' == 'true'">
+    <!-- Don't use SDK's trimming functionality. -->
+    <_RequiresILLinkPack>false</_RequiresILLinkPack>
+    <!-- Keep in sync with SetTargetFramework metadata on the ProjectReference below. -->
+    <ILLinkTasksAssembly Condition="'$(MSBuildRuntimeType)' == 'Core'">$(ToolsILLinkDir)$(NetCoreAppToolCurrent)\ILLink.Tasks.dll</ILLinkTasksAssembly>
+    <ILLinkTasksAssembly Condition="'$(MSBuildRuntimeType)' != 'Core'">$(ToolsILLinkDir)$(NetFrameworkToolCurrent)\ILLink.Tasks.dll</ILLinkTasksAssembly>
+  </PropertyGroup>
+
+  <ItemGroup Condition="'$(_RequiresLiveILLink)' == 'true'">
+    <!-- The assembly shouldn't be referenced, nor promoted to a package dependency, nor copied to the output directory. -->
+    <ProjectReference Include="$(_ILLinkTasksSourceDir)ILLink.Tasks.csproj"
+                      ReferenceOutputAssembly="false"
+                      PrivateAssets="all"
+                      Private="false"
+                      SetConfiguration="Configuration=$(ToolsConfiguration)">
+        <!-- Keep TFMs in sync with ILLink.Tasks.csproj -->
+        <SetTargetFramework Condition="'$(MSBuildRuntimeType)' == 'Core'">TargetFramework=$(NetCoreAppToolCurrent)</SetTargetFramework>
+        <SetTargetFramework Condition="'$(MSBuildRuntimeType)' != 'Core'">TargetFramework=$(NetFrameworkToolCurrent)</SetTargetFramework>
+    </ProjectReference>
+  </ItemGroup>
+
+</Project>

eng/targetingpacks.targets

@@ -85,13 +85,6 @@
                       Condition="'$(UseLocalAppHostPack)' == 'true' and '@(KnownAppHostPack->AnyHaveMetadataValue('TargetFramework', '$(NetCoreAppCurrent)'))' != 'true'" />
   </ItemGroup>
 
-  <!-- Add known packs from the downlevel TFM until we are building with an SDK that supports the new TFM all-up. -->
-  <ItemGroup Condition="'$(NetCoreAppToolCurrent)' != '$(NetCoreAppCurrent)'">
-    <KnownILLinkPack Include="@(KnownILLinkPack->WithMetadataValue('Identity', 'Microsoft.NET.ILLink.Tasks')->WithMetadataValue('TargetFramework', '$(NetCoreAppToolCurrent)'))">
-      <TargetFramework>$(NetCoreAppCurrent)</TargetFramework>
-    </KnownILLinkPack>
-  </ItemGroup>
-
   <!-- Simple name references will be resolved from the targeting pack folders and should never be copied to the output. -->
   <ItemGroup>
     <Reference Update="@(Reference)">

eng/testing/linker/project.csproj.template

@@ -12,7 +12,10 @@
   <!-- This must be done after the usual nuget props imports, to override the implicitly referenced
        Microsoft.NET.ILLink.Tasks.props from the SDK. -->
   <Import Project="$(ToolsILLinkDir)$(NetCoreAppToolCurrent)/build/Microsoft.NET.ILLink.Tasks.props" />
+
   <PropertyGroup>
+    <!-- Don't use SDK's trimming functionality. -->
+    <_RequiresILLinkPack>false</_RequiresILLinkPack>
     <ILLinkTasksAssembly>$(ToolsILLinkDir)$(NetCoreAppToolCurrent)/ILLink.Tasks.dll</ILLinkTasksAssembly>
   </PropertyGroup>
 

eng/testing/tests.mobile.targets

@@ -165,5 +165,4 @@
           DependsOnTargets="InstallWorkloadUsingArtifacts"
           Condition="'$(InstallWorkloadForTesting)' == 'true'" />
 
-  <Import Project="$(RepositoryEngineeringDir)illink.targets" Condition="'$(EnableAggressiveTrimming)' == 'true' or '$(EnableSoftTrimming)' == 'true'" />
 </Project>

src/coreclr/Directory.Build.targets

@@ -1,4 +1,5 @@
 <Project>
+
   <Import Project="..\..\Directory.Build.targets" />
 
   <ItemGroup Condition="'$(UsingMicrosoftNoTargetsSdk)' != 'true'">
@@ -28,5 +29,6 @@
 
   <!-- Import targets here to have TargetPath and other macros defined. Limit to CoreLib. -->
   <Import Condition="'$(MSBuildProjectName)' == 'System.Private.CoreLib' or '$(IsNativeAotProject)' == 'true'" Project="$(RepositoryEngineeringDir)illink.targets" />
+  <Import Project="$(RepositoryEngineeringDir)liveILLink.targets" />
 
 </Project>

src/libraries/Directory.Build.targets

@@ -127,6 +127,7 @@
   <Import Project="$(RepositoryEngineeringDir)testing\coverage.targets" Condition="'$(EnableRunSettingsSupport)' == 'true' or '$(EnableCoverageSupport)' == 'true'" />
 
   <Import Project="$(RepositoryEngineeringDir)illink.targets" Condition="'$(IsSourceProject)' == 'true' or '$(ExplicitlyImportCustomILLinkTargets)' == 'true'" />
+  <Import Project="$(RepositoryEngineeringDir)liveILLink.targets" />
   <Import Project="$(RepositoryEngineeringDir)nativeSanitizers.targets" />
 
   <ItemGroup Condition="'$(UseTargetFrameworkPackage)' != 'false'">

src/libraries/sendtohelix-mobile.targets

@@ -58,8 +58,6 @@
       <_XHarnessAppleCustomCommand Condition="'$(NeedsiOSSDK)' == 'true'">
         source build-apple-app.sh
       </_XHarnessAppleCustomCommand>
-      <!-- Use ILLink.Tasks version matching the SDK used to build. See comment about _RequiresILLinkPack in eng/illink.targets -->
-      <ILLinkDir>$([MSBuild]::NormalizeDirectory('$(NuGetPackageRoot)', 'microsoft.net.illink.tasks', '$(BundledNETCoreAppPackageVersion)'))</ILLinkDir>
     </PropertyGroup>
 
     <ItemGroup Condition="'$(NeedsiOSSDK)' == 'true'">
@@ -79,7 +77,7 @@
                                                                                  Destination="build/BuildIntegration" />
       <HelixCorrelationPayload Include="$(CoreCLRAotSdkDir)"                     Condition="'$(RuntimeFlavor)' == 'coreclr'"
                                                                                  Destination="build/aotsdk" />
-      <HelixCorrelationPayload Include="$(ILLinkDir)"                            Destination="build/microsoft.net.illink.tasks" />
+      <HelixCorrelationPayload Include="$(ToolsILLinkDir)"                       Destination="build/microsoft.net.illink.tasks" />
     </ItemGroup>
 
     <ItemGroup Condition="'$(TargetsAppleMobile)' == 'true'">

src/mono/Directory.Build.targets

@@ -3,4 +3,6 @@
 
   <!-- Import targets here to have TargetPath and other macros defined. Limit to CoreLib. -->
   <Import Condition="'$(MSBuildProjectName)' == 'System.Private.CoreLib'" Project="$(RepositoryEngineeringDir)illink.targets" />
+  <Import Project="$(RepositoryEngineeringDir)liveILLink.targets" />
+
 </Project>

src/mono/msbuild/apple/build/AppleBuild.LocalBuild.props

@@ -65,8 +65,8 @@
     <IlcSdkPath>$([MSBuild]::NormalizeDirectory('$(BuildBaseDir)', 'aotsdk'))</IlcSdkPath>
     <IlcFrameworkPath>$(MicrosoftNetCoreAppRuntimePackLibDir)</IlcFrameworkPath>
     <IlcFrameworkNativePath>$(MicrosoftNetCoreAppRuntimePackNativeDir)</IlcFrameworkNativePath>
-    <ILLinkTargetsPath>$([MSBuild]::NormalizePath('$(BuildBaseDir)', 'microsoft.net.illink.tasks', 'build', 'Microsoft.NET.ILLink.targets'))</ILLinkTargetsPath>
-    <ILLinkTasksAssembly>$([MSBuild]::NormalizePath('$(BuildBaseDir)', 'microsoft.net.illink.tasks', 'tools', '$(_NetCoreAppToolCurrent)', 'ILLink.Tasks.dll'))</ILLinkTasksAssembly>
+    <ILLinkTargetsPath>$([MSBuild]::NormalizePath('$(BuildBaseDir)', 'microsoft.net.illink.tasks', '$(_NetCoreAppToolCurrent)', 'build', 'Microsoft.NET.ILLink.targets'))</ILLinkTargetsPath>
+    <ILLinkTasksAssembly>$([MSBuild]::NormalizePath('$(BuildBaseDir)', 'microsoft.net.illink.tasks', '$(_NetCoreAppToolCurrent)', 'ILLink.Tasks.dll'))</ILLinkTasksAssembly>
     <_MonoAotCrossCompilerPath>$([MSBuild]::NormalizePath($(MonoAotCrossDir), 'mono-aot-cross'))</_MonoAotCrossCompilerPath>
     <_MonoAotCrossCompilerPath Condition="$([MSBuild]::IsOSPlatform('WINDOWS'))">$(_MonoAotCrossCompilerPath).exe</_MonoAotCrossCompilerPath>
   </PropertyGroup>

src/tests/Directory.Build.props

@@ -2,8 +2,6 @@
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <LibrariesConfiguration>Release</LibrariesConfiguration>
-    <!-- NativeAot tests rely on presence of ILLink targets, but don't actually run ILLink. -->
-    <UsingToolMicrosoftNetILLinkTasks Condition="'$(UsingToolMicrosoftNetILLinkTasks)' == ''">true</UsingToolMicrosoftNetILLinkTasks>
     <InstallV8ForTests>false</InstallV8ForTests>
   </PropertyGroup>
 

src/tests/Directory.Build.targets

@@ -264,6 +264,7 @@
     <MSBuild Projects="@(ProjectReference)"
         Targets="CopyAllNativeProjectReferenceBinaries"
         Condition="'$(IsMergedTestRunnerAssembly)' == 'true'"
+        SkipNonexistentTargets="true"
         BuildInParallel="true" />
   </Target>
 
@@ -592,6 +593,7 @@
   <Import Project="$(RepositoryEngineeringDir)nativeSanitizers.targets" Condition="'$(TestBuildMode)' == 'nativeaot'" />
 
   <Import Project="$(CoreCLRBuildIntegrationDir)Microsoft.DotNet.ILCompiler.SingleEntry.targets" Condition="'$(TestBuildMode)' == 'nativeaot'" />
+  <Import Project="$(RepoRoot)eng/liveILLink.targets" />
 
   <ItemGroup Condition="'$(TestBuildMode)' == 'nativeaot'">
     <Content Include="@(SanitizerRuntimeToCopy->'$(CoreCLRArtifactsPath)/%(Identity)')" CopyToOutputDirectory="PreserveNewest" />

src/tools/illink/src/Directory.Build.props

@@ -3,5 +3,7 @@
 
   <PropertyGroup>
     <Nullable>enable</Nullable>
+    <!-- Disable analyzer to prevent a circular dependency due to ProjectReference to ILLink.Tasks. -->
+    <EnableSingleFileAnalyzer>false</EnableSingleFileAnalyzer>
   </PropertyGroup>
-</Project>
+</Project>

src/tools/illink/src/ILLink.Tasks/ILLink.Tasks.csproj

@@ -22,8 +22,6 @@
     <IncludeBuildOutput>false</IncludeBuildOutput>
     <IncludeMultiTargetRoslynComponentTargets>false</IncludeMultiTargetRoslynComponentTargets>
     <TargetsForTfmSpecificContentInPackage>$(TargetsForTfmSpecificContentInPackage);AddBuildOutputToToolsPackage</TargetsForTfmSpecificContentInPackage>
-    <!-- Disable analyzer to prevent a circular dependency due to PackageReference to the LKG Microsoft.NET.ILLink.Tasks. -->
-    <EnableSingleFileAnalyzer>false</EnableSingleFileAnalyzer>
   </PropertyGroup>
 
   <!-- Include the illink.runtimeconfig.pack.json file (which depends on the runtimeversion being built)