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illink.targets
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<Project>
<PropertyGroup>
<!-- Custom trimming logic should always use live ILLink, even when none of the
trimming-related SDK properties are set. -->
<_RequiresLiveILLink>true</_RequiresLiveILLink>
</PropertyGroup>
<PropertyGroup>
<IsTrimmable Condition="'$(IsTrimmable)' == ''">true</IsTrimmable>
<PrepareResourcesDependsOn>_EmbedILLinkXmls;$(PrepareResourcesDependsOn)</PrepareResourcesDependsOn>
<TargetsTriggeredByCompilation Condition="'$(DesignTimeBuild)' != 'true'">$(TargetsTriggeredByCompilation);ILLinkTrimAssembly</TargetsTriggeredByCompilation>
<ILLinkDirectory Condition="'$(ILLinkDirectory)' == ''">$(MSBuildProjectDirectory)\ILLink\</ILLinkDirectory>
<ILLinkTrimAssemblyPath>$(IntermediateOutputPath)$(TargetName)$(TargetExt)</ILLinkTrimAssemblyPath>
<ILLinkTrimAssemblySymbols>$(IntermediateOutputPath)$(TargetName).pdb</ILLinkTrimAssemblySymbols>
<ILLinkTrimInputPath>$(IntermediateOutputPath)PreTrim/</ILLinkTrimInputPath>
<ILLinkTrimInputAssembly>$(ILLinkTrimInputPath)$(TargetName)$(TargetExt)</ILLinkTrimInputAssembly>
<ILLinkTrimInputSymbols>$(ILLinkTrimInputPath)$(TargetName).pdb</ILLinkTrimInputSymbols>
<ILLinkTrimOutputPath>$(IntermediateOutputPath)</ILLinkTrimOutputPath>
<ILLinkDescriptorsXml Condition="'$(ILLinkDescriptorsXml)' == '' and Exists('$(ILLinkDirectory)ILLink.Descriptors.xml')">$(ILLinkDirectory)ILLink.Descriptors.xml</ILLinkDescriptorsXml>
<!-- ILLink.Descriptors.LibraryBuild.xml files are only used during building the library, not an app. They shouldn't be embedded into the assembly. -->
<ILLinkDescriptorsLibraryBuildXml Condition="'$(ILLinkDescriptorsLibraryBuildXml)' == '' and Exists('$(ILLinkDirectory)ILLink.Descriptors.LibraryBuild.xml')">$(ILLinkDirectory)ILLink.Descriptors.LibraryBuild.xml</ILLinkDescriptorsLibraryBuildXml>
<ILLinkDescriptorsXmlIntermediatePath>$(IntermediateOutputPath)ILLink.Descriptors.xml</ILLinkDescriptorsXmlIntermediatePath>
<ILLinkSubstitutionsXmlIntermediatePath>$(IntermediateOutputPath)ILLink.Substitutions.xml</ILLinkSubstitutionsXmlIntermediatePath>
<ILLinkLinkAttributesXmlIntermediatePath>$(IntermediateOutputPath)ILLink.LinkAttributes.xml</ILLinkLinkAttributesXmlIntermediatePath>
<ILLinkSuppressionsXmlPrefix>$(ILLinkDirectory)ILLink.Suppressions</ILLinkSuppressionsXmlPrefix>
<ILLinkSuppressionsXml>$(ILLinkSuppressionsXmlPrefix).xml</ILLinkSuppressionsXml>
<ILLinkSuppressionsConfigurationSpecificXml>$(ILLinkSuppressionsXmlPrefix).$(Configuration).xml</ILLinkSuppressionsConfigurationSpecificXml>
<!-- Only run the trim analyzer on libraries which have been annotated. -->
<EnableTrimAnalyzer Condition="'$(EnableTrimAnalyzer)' == '' And (Exists('$(ILLinkSuppressionsXml)') Or Exists('$(ILLinkSuppressionsConfigurationSpecificXml)'))">false</EnableTrimAnalyzer>
<!-- if building a PDB, tell illink to rewrite the symbols file -->
<ILLinkRewritePDBs Condition="'$(ILLinkRewritePDBs)' == '' and '$(DebugSymbols)' != 'false'">true</ILLinkRewritePDBs>
<ILLinkResourcesSubstitutionIntermediatePath>$(IntermediateOutputPath)ILLink.Resources.Substitutions.xml</ILLinkResourcesSubstitutionIntermediatePath>
<GenerateResourcesSubstitutions Condition="'$(GenerateResourcesSubstitutions)' == '' and '$(StringResourcesPath)' != ''">true</GenerateResourcesSubstitutions>
</PropertyGroup>
<ItemGroup>
<ILLinkSuppressionsLibraryBuildXml Include="$(ILLinkSuppressionsXmlPrefix).LibraryBuild.xml"
Condition="Exists('$(ILLinkSuppressionsXmlPrefix).LibraryBuild.xml')" />
<ILLinkSuppressionsXmls Include="$(ILLinkSuppressionsXml)"
Condition="Exists('$(ILLinkSuppressionsXml)')" />
<ILLinkSuppressionsXmls Include="$(ILLinkSuppressionsConfigurationSpecificXml)"
Condition="Exists('$(ILLinkSuppressionsConfigurationSpecificXml)')" />
<ILLinkSuppressionsXmls Include="@(ILLinkSuppressionsLibraryBuildXml)" />
<ILLinkSuppressionsXmls Update="@(ILLinkSuppressionsXmls)"
TargetPath="%(FileName).$(AssemblyName).xml" />
</ItemGroup>
<ItemGroup>
<ILLinkSubstitutionsXmls Include="$(ILLinkResourcesSubstitutionIntermediatePath)"
Condition="'$(GenerateResourcesSubstitutions)' == 'true'" />
<None Include="@(ILLinkSubstitutionsXmls)" />
<None Include="$(ILLinkDescriptorsLibraryBuildXml)"
Condition="'$(ILLinkDescriptorsLibraryBuildXml)' != ''" />
</ItemGroup>
<!-- Flow the IsTrimmable property down to consuming projects, in order for oob.proj
to exclude non trimmable assemblies. -->
<ItemDefinitionGroup>
<TargetPathWithTargetPlatformMoniker>
<IsTrimmable>$(IsTrimmable)</IsTrimmable>
</TargetPathWithTargetPlatformMoniker>
</ItemDefinitionGroup>
<!-- Flow the ILLinkSuppressionsXmls item list down to consuming projects, in order for sfx.proj and oob.proj to
receive the suppression files. -->
<Target Name="AnnotateTargetPathWithILLinkSuppressionsXmlsProp"
AfterTargets="GetTargetPathWithTargetPlatformMoniker">
<ItemGroup>
<TargetPathWithTargetPlatformMoniker ILLinkSuppressionsXmls="@(ILLinkSuppressionsXmls->Metadata('FullPath'))" />
</ItemGroup>
</Target>
<Target Name="_EmbedILLinkXmls"
DependsOnTargets="_CombineILLinkDescriptorsXmls;
_CombineILLinkSubstitutionsXmls;
_CombineILLinkLinkAttributesXmls">
<ItemGroup>
<EmbeddedResource Include="$(ILLinkDescriptorsXml)"
LogicalName="ILLink.Descriptors.xml"
Condition="'$(ILLinkDescriptorsXml)' != ''" />
<EmbeddedResource Include="$(ILLinkSubstitutionsXml)"
LogicalName="ILLink.Substitutions.xml"
Condition="'$(ILLinkSubstitutionsXml)' != ''" />
<EmbeddedResource Include="$(ILLinkLinkAttributesXml)"
LogicalName="ILLink.LinkAttributes.xml"
Condition="'$(ILLinkLinkAttributesXml)' != ''" />
</ItemGroup>
</Target>
<UsingTask TaskName="CombineLinkerXmlFiles"
AssemblyFile="$(ILLinkTasksAssembly)"
TaskFactory="TaskHostFactory"
Condition="'$(ILLinkTasksAssembly)' != ''" />
<Target Name="_CombineILLinkDescriptorsXmls"
Condition="'@(ILLinkDescriptorsXmls)' != ''"
Inputs="@(ILLinkDescriptorsXmls)"
Outputs="$(ILLinkDescriptorsXmlIntermediatePath)">
<PropertyGroup>
<ILLinkDescriptorsXml>$(ILLinkDescriptorsXmlIntermediatePath)</ILLinkDescriptorsXml>
</PropertyGroup>
<CombineLinkerXmlFiles LinkerXmlFiles="@(ILLinkDescriptorsXmls)"
CombinedLinkerXmlFile="$(ILLinkDescriptorsXml)" />
<ItemGroup>
<FileWrites Include="$(ILLinkDescriptorsXml)" />
</ItemGroup>
</Target>
<!-- If a library uses string resources, the following target generates a substitution xml that will be embedded on the
library so that if a consumer wants to run the linker they can specify a feature switch to strip out all resources
from the assembly. -->
<Target Name="GenerateResourcesSubstitutionFile"
Condition="'$(GenerateResourcesSubstitutions)' == 'true'"
Inputs="$(MSBuildProjectFullPath)"
Outputs="$(ILLinkResourcesSubstitutionIntermediatePath)">
<PropertyGroup>
<ILLinkResourcesSubstitutionTemplate>$(MSBuildThisFileDirectory)ILLink.Substitutions.Resources.template</ILLinkResourcesSubstitutionTemplate>
</PropertyGroup>
<WriteLinesToFile File="$(ILLinkResourcesSubstitutionIntermediatePath)"
Lines="$([System.IO.File]::ReadAllText('$(ILLinkResourcesSubstitutionTemplate)')
.Replace('{AssemblyName}', '$(AssemblyName)')
.Replace('{StringResourcesName}', '$(StringResourcesName)'))"
Overwrite="true" />
<ItemGroup>
<FileWrites Include="$(ILLinkResourcesSubstitutionIntermediatePath)" />
</ItemGroup>
</Target>
<Target Name="_CombineILLinkSubstitutionsXmls"
DependsOnTargets="GenerateResourcesSubstitutionFile"
Condition="'@(ILLinkSubstitutionsXmls)' != ''"
Inputs="@(ILLinkSubstitutionsXmls)"
Outputs="$(ILLinkSubstitutionsXmlIntermediatePath)">
<PropertyGroup>
<ILLinkSubstitutionsXml>$(ILLinkSubstitutionsXmlIntermediatePath)</ILLinkSubstitutionsXml>
</PropertyGroup>
<CombineLinkerXmlFiles LinkerXmlFiles="@(ILLinkSubstitutionsXmls)"
CombinedLinkerXmlFile="$(ILLinkSubstitutionsXml)" />
<ItemGroup>
<FileWrites Include="$(ILLinkSubstitutionsXml)" />
</ItemGroup>
</Target>
<Target Name="_CombineILLinkLinkAttributesXmls"
Condition="'@(ILLinkLinkAttributesXmls)' != ''"
Inputs="@(ILLinkLinkAttributesXmls)"
Outputs="$(ILLinkLinkAttributesXmlIntermediatePath)">
<PropertyGroup>
<ILLinkLinkAttributesXml>$(ILLinkLinkAttributesXmlIntermediatePath)</ILLinkLinkAttributesXml>
</PropertyGroup>
<CombineLinkerXmlFiles LinkerXmlFiles="@(ILLinkLinkAttributesXmls)"
CombinedLinkerXmlFile="$(ILLinkLinkAttributesXml)" />
<ItemGroup>
<FileWrites Include="$(ILLinkLinkAttributesXml)" />
</ItemGroup>
</Target>
<Target Name="PrepareForAssembliesTrim">
<!-- ILLink.Tasks arguments common to runs for both individual libraries and for the entire runtime pack -->
<PropertyGroup>
<!-- don't remove attributes after build, our tooling is not ready for that -->
<ILLinkArgs>$(ILLinkArgs) --ignore-link-attributes true</ILLinkArgs>
<!-- ignore unresolved references -->
<ILLinkArgs>$(ILLinkArgs) --skip-unresolved true</ILLinkArgs>
</PropertyGroup>
<!-- When running from Desktop MSBuild, DOTNET_HOST_PATH is not set.
In this case, explicitly specify the path to the dotnet host. -->
<PropertyGroup Condition="'$(DOTNET_HOST_PATH)' == ''">
<!-- This is defined when building in Visual Studio. -->
<_DotNetHostDirectory>$(NetCoreRoot)</_DotNetHostDirectory>
<_DotNetHostFileName>$([System.IO.Path]::GetFileName('$(DotNetTool)'))</_DotNetHostFileName>
</PropertyGroup>
</Target>
<!-- Examines the "input assembly" for IL that is unreachable from public API and trims that,
rewriting the assembly to an "output assembly" -->
<UsingTask TaskName="ILLink"
AssemblyFile="$(ILLinkTasksAssembly)"
TaskFactory="TaskHostFactory"
Condition="'$(ILLinkTasksAssembly)' != ''" />
<Target Name="ILLinkTrimAssembly"
Condition="'$(ILLinkTrimAssembly)' == 'true'"
DependsOnTargets="PrepareForAssembliesTrim">
<PropertyGroup>
<!-- default action for assemblies with IsTrimmable attribute -->
<ILLinkArgs>$(ILLinkArgs) --trim-mode skip</ILLinkArgs>
<!-- default action for assemblies without IsTrimmable attribute -->
<ILLinkArgs>$(ILLinkArgs) --action skip</ILLinkArgs>
<!-- trim the target assembly -->
<ILLinkArgs>$(ILLinkArgs) --action link $(TargetName)</ILLinkArgs>
<ILLinkArgs Condition="'$(ILLinkRewritePDBs)' == 'true' and Exists('$(ILLinkTrimAssemblySymbols)')">$(ILLinkArgs) -b true</ILLinkArgs>
<!-- pass the non-embedded descriptors xml file on the command line -->
<ILLinkArgs Condition="'$(ILLinkDescriptorsLibraryBuildXml)' != ''">$(ILLinkArgs) -x "$(ILLinkDescriptorsLibraryBuildXml)"</ILLinkArgs>
<ILLinkArgs Condition="'$(ILLinkSubstitutionsLibraryBuildXml)' != ''">$(ILLinkArgs) --substitutions "$(ILLinkSubstitutionsLibraryBuildXml)"</ILLinkArgs>
<ILLinkArgs Condition="'@(ILLinkSuppressionsLibraryBuildXml)' != ''">$(ILLinkArgs) --link-attributes "@(ILLinkSuppressionsLibraryBuildXml->'%(FullPath)', '" --link-attributes "')"</ILLinkArgs>
<!-- suppress warnings with the following codes:
IL2008: Could not find type A specified in resource B
IL2009: Could not find method A in type B specified in resource C
IL2121: Unnecessary UnconditionalSuppressMessage attribute
IL2025: Duplicate preserve of A in B
IL2035: Unresolved assembly A in DynamicDependencyAttribute on B
-->
<LinkerNoWarn>$(LinkerNoWarn);IL2008;IL2009;IL2121;IL2025;IL2035</LinkerNoWarn>
<ILLinkArgs>$(ILLinkArgs) --nowarn $(LinkerNoWarn)</ILLinkArgs>
<ILLinkArgs Condition="'$(ILLinkDisableIPConstProp)' == 'true'">$(ILLinkArgs) --disable-opt ipconstprop</ILLinkArgs>
</PropertyGroup>
<!-- Move the assembly into a subdirectory for ILLink -->
<Move SourceFiles="$(ILLinkTrimAssemblyPath)"
DestinationFolder="$(ILLinkTrimInputPath)">
<Output TaskParameter="MovedFiles" ItemName="FileWrites" />
</Move>
<!-- Move the PDB into a subdirectory for ILLink if we are rewriting PDBs -->
<Move SourceFiles="$(ILLinkTrimAssemblySymbols)"
DestinationFolder="$(ILLinkTrimInputPath)"
Condition="'$(ILLinkRewritePDBs)' == 'true' and Exists('$(ILLinkTrimAssemblySymbols)')">
<Output TaskParameter="MovedFiles" ItemName="FileWrites" />
</Move>
<ItemGroup>
<_DependencyDirectoriesTemp Include="@(ReferencePathWithRefAssemblies->'%(RootDir)%(Directory)')" />
<!-- Remove duplicate directories by batching over them -->
<!-- Add project references first to give precedence to project-specific files -->
<_DependencyDirectories Condition="'%(_DependencyDirectoriesTemp.ReferenceSourceTarget)'=='ProjectReference'" Include="%(_DependencyDirectoriesTemp.Identity)" />
<_DependencyDirectories Condition="'%(_DependencyDirectoriesTemp.ReferenceSourceTarget)'!='ProjectReference'" Include="%(_DependencyDirectoriesTemp.Identity)" />
<!-- Remove trailing slash to work around response file parsing behavior -->
<_DependencyDirectoriesSlash Include="@(_DependencyDirectories)">
<PathWithSlash>$([MSBuild]::EnsureTrailingSlash('%(Identity)'))</PathWithSlash>
</_DependencyDirectoriesSlash>
<_DependencyDirectoriesNoSlash Include="@(_DependencyDirectoriesSlash)">
<PathWithoutSlash>$([System.String]::new('%(PathWithSlash)').TrimEnd($([System.IO.Path]::DirectorySeparatorChar)))</PathWithoutSlash>
</_DependencyDirectoriesNoSlash>
<_DependencyDirectories Remove="@(_DependencyDirectories)" />
<_DependencyDirectories Include="%(_DependencyDirectoriesNoSlash.PathWithoutSlash)" />
<ILLinkTrimInputAssembly Include="$(ILLinkTrimInputPath)$(TargetName)$(TargetExt)">
<RootMode>library</RootMode>
</ILLinkTrimInputAssembly>
</ItemGroup>
<PropertyGroup>
<ILLinkArgs Condition="@(_DependencyDirectories->Count()) > 0">$(ILLinkArgs) -d @(_DependencyDirectories->'"%(Identity)"', ' -d ')</ILLinkArgs>
</PropertyGroup>
<ILLink AssemblyPaths=""
RootAssemblyNames="@(ILLinkTrimInputAssembly)"
OutputDirectory="$(ILLinkTrimOutputPath)"
ExtraArgs="$(ILLinkArgs)"
ToolExe="$(_DotNetHostFileName)"
ToolPath="$(_DotNetHostDirectory)" />
</Target>
<!-- ILLink reporting.
Only enabled when developer specifies a path to the AsmDiff tool with property AsmDiffCmd.
EG: AsmDiffCmd=d:\tools\asmdiff\asmdiff.exe
This is necessary until the AsmDiff tool is ported to .NET Core. -->
<Target Name="_CreateILLinkTrimAssemblyReports"
AfterTargets="ILLinkTrimAssembly"
Condition="'$(AsmDiffCmd)' != ''">
<PropertyGroup>
<AsmDiffArgs>$(AsmDiffArgs) $(ILLinkTrimInputAssembly)</AsmDiffArgs>
<AsmDiffArgs>$(AsmDiffArgs) $(ILLinkTrimAssemblyPath)</AsmDiffArgs>
<AsmDiffArgs>$(AsmDiffArgs) -includePrivateApis -includeInternalApis -alwaysDiffMembers -diffAttributes</AsmDiffArgs>
<AsmDiffReport>$(IntermediateOutputPath)$(TargetName).diff.html</AsmDiffReport>
<AsmDiffReportArgs>$(AsmDiffArgs) -out:$(AsmDiffReport)</AsmDiffReportArgs>
<AsmDiffReportArgs>$(AsmDiffReportArgs) -unchanged -changed -added -removed</AsmDiffReportArgs>
<AsmDiffList>$(IntermediateOutputPath)$(TargetName).diff.csv</AsmDiffList>
<AsmDiffListArgs>$(AsmDiffArgs) -out:$(AsmDiffList)</AsmDiffListArgs>
<AsmDiffListArgs>$(AsmDiffListArgs) -unchanged -changed -added -removed </AsmDiffListArgs>
<AsmDiffListArgs>$(AsmDiffListArgs) -diffWriter:CSV</AsmDiffListArgs>
</PropertyGroup>
<Exec Command="$(AsmDiffCmd) $(AsmDiffReportArgs)" />
<Message Text="Assembly trimming diff: $(AsmDiffReport)" />
<Exec Command="$(AsmDiffCmd) $(AsmDiffListArgs)" />
<Message Text="Assembly trimming report: $(AsmDiffList)" />
</Target>
</Project>