295 lines
15 KiB
Plaintext
295 lines
15 KiB
Plaintext
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<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup>
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<LinkTaskDllPath Condition=" '$(LinkTaskDllPath)' == '' ">$(MSBuildThisFileDirectory)../tools/$(TargetFramework)/ILLink.Tasks.dll</LinkTaskDllPath>
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</PropertyGroup>
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<PropertyGroup>
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<!-- LinkDuringPublish allows the linker to be disabled by passing
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a property on the command-line. (/p:LinkDuringPublish=false)
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-->
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<LinkDuringPublish Condition=" '$(LinkDuringPublish)' == '' ">true</LinkDuringPublish>
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<LinkDuringPublish Condition=" '$(LinkDuringPublish)' != 'true' ">false</LinkDuringPublish>
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<ShowLinkerSizeComparison Condition=" '$(ShowLinkerSizeComparison)' == '' ">false</ShowLinkerSizeComparison>
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</PropertyGroup>
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<ItemGroup>
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<!-- LinkerRootDescriptors (the ItemGroup) is set to contain
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LinkerRootDescriptors (the Property), which allows adding
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linker roots on the command-line
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(/p:LinkerRootDescriptors=path/to/a.xml;path/to/b.xml;). These
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are relative paths from the project to the xml file.
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LinkerRootDescriptors (the ItemGroup) can also be set in the
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project file, and these will be included in addition to those
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specified on the command-line. -->
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<LinkerRootDescriptors Include="$(LinkerRootDescriptors)" />
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</ItemGroup>
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<!-- By default, the linker will generate roots for the intermediate
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assembly that root everything in the assembly. -->
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<PropertyGroup>
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<_IntermediateRootDescriptorName Condition=" '$(_IntermediateRootDescriptorName)' == '' ">IntermediateAssemblyRoots.xml</_IntermediateRootDescriptorName>
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<_IntermediateRootDescriptorPath Condition=" '$(_IntermediateRootDescriptorPath)' == '' ">$(IntermediateOutputPath)$(_IntermediateRootDescriptorName)</_IntermediateRootDescriptorPath>
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</PropertyGroup>
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<!-- The linker will place linked assemblies into an intermediate
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directory, and hook into the rest of the publish pipeline to
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publish the linked assemblies instead of those given as input
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to the linker. -->
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<PropertyGroup>
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<IntermediateLinkDirName Condition=" '$(IntermediateLinkDirName)' == '' ">linked</IntermediateLinkDirName>
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<IntermediateLinkDir Condition=" '$(IntermediateLinkDir)' == '' ">$(IntermediateOutputPath)$(IntermediateLinkDirName)</IntermediateLinkDir>
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</PropertyGroup>
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<!-- Used to enable incremental build for the link target. -->
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<PropertyGroup>
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<_LinkSemaphore>$(IntermediateOutputPath)Link.semaphore</_LinkSemaphore>
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<_LinkDepsSemaphore>$(IntermediateOutputPath)LinkDeps.semaphore</_LinkDepsSemaphore>
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</PropertyGroup>
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<!--
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This target runs the linker during the publish pipeline. The
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publish pipeline has a target called ComputeFilesToPublish,
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which computes the ItemGroup ResolvedFileToPublish. To extend
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this target, we insert a target before
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ComputeFilesToPublish. Our target rewrites the relevant inputs
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(@(IntermediateAssembly) and
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@(ResolvedAssembliesToPublish)). This lets ComputeFilesToPublish
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be ignorant of the linker, but changes the meaning of
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IntermediateAssembly and ResolvedAssembliesToPublish.
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-->
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<!-- DependsOnTargets here doesn't include the targets that compute
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ResolvedAssembliesToPublish or IntermediateAssembly, because
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ComputeFilesToPublish already depends on
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these. BeforeTargets="ComputeFilesToPublish" ensures that
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ComputeLinkedFilesToPublish will run before
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ComputeFilesToPublish, but after all of its dependencies. -->
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<Target Name="ComputeLinkedFilesToPublish"
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BeforeTargets="ComputeFilesToPublish"
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DependsOnTargets="_ComputeLinkedAssemblies"
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Condition=" '$(LinkDuringPublish)' == 'true' ">
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<!-- Rewrite ResolvedAssembliesToPublish, which is an input to
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ComputeFilesToPublish. -->
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<ItemGroup>
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<ResolvedAssembliesToPublish Remove="@(_ManagedResolvedAssembliesToPublish)" />
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<ResolvedAssembliesToPublish Include="@(_LinkedResolvedAssemblies)" />
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</ItemGroup>
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<!-- Rewrite IntermediateAssembly, which is an input to
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ComputeFilesToPublish. -->
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<ItemGroup>
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<IntermediateAssembly Remove="@(IntermediateAssembly)" />
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<IntermediateAssembly Include="@(_LinkedIntermediateAssembly)" />
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</ItemGroup>
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</Target>
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<!-- Print out a size comparison report for the linked
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assemblies. This is disabled by default, but can be turned on
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by setting $(ShowLinkerSizeComparison) to true. This runs after
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the top-level link target, ComputeLinkedFilesToPublish, so it
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is output even during incremental builds. -->
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<UsingTask TaskName="CompareAssemblySizes" AssemblyFile="$(LinkTaskDllPath)" />
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<Target Name="_CompareLinkedAssemblySizes"
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AfterTargets="ComputeLinkedFilesToPublish"
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DependsOnTargets="_ComputeManagedAssembliesToLink;_ComputeLinkedAssemblies"
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Condition=" '$(LinkDuringPublish)' == 'true' And '$(ShowLinkerSizeComparison)' == 'true' ">
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<CompareAssemblySizes UnlinkedAssemblies="@(_ManagedAssembliesToLink)"
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LinkedAssemblies="@(_LinkedIntermediateAssembly);@(_LinkedResolvedAssemblies)" />
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</Target>
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<!-- Computes _LinkedResolvedAssemblies and
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_LinkedIntermediateAssembly. _LinkedResolvedAssemblies needs to
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keep metadata from _ManagedResolvedAssembliesToPublish, since
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this is used by ComputeFilesToPublish. -->
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<Target Name="_ComputeLinkedAssemblies"
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DependsOnTargets="_ComputeManagedResolvedAssembliesToPublish;ILLink">
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<ItemGroup>
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<__LinkedResolvedAssemblies Include="@(_ManagedResolvedAssembliesToPublish->'$(IntermediateLinkDir)/%(Filename)%(Extension)')" />
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<_LinkedResolvedAssemblies Include="@(__LinkedResolvedAssemblies)" Condition="Exists('%(Identity)')" />
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</ItemGroup>
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<ItemGroup>
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<__LinkedIntermediateAssembly Include="@(IntermediateAssembly->'$(IntermediateLinkDir)/%(Filename)%(Extension)')" />
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<_LinkedIntermediateAssembly Include="@(__LinkedIntermediateAssembly)" Condition="Exists('%(Identity)')" />
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</ItemGroup>
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</Target>
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<!-- This calls the linker. Inputs are the managed assemblies to
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link, and root specifications. The semaphore enables msbuild to
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skip linking during an incremental build, when the semaphore is
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up to date with respect to _ManagedAssembliesToLink. -->
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<UsingTask TaskName="ILLink" AssemblyFile="$(LinkTaskDllPath)" />
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<Target Name="ILLink"
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DependsOnTargets="_ComputeManagedAssembliesToLink;_ComputeLinkerRootAssemblies;_ComputeLinkerRootDescriptors"
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Inputs="@(_ManagedAssembliesToLink);@(LinkerRootDescriptors);$(MSBuildAllProjects)"
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Outputs="$(_LinkSemaphore)">
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<!-- These extra arguments have been hard-coded for now, as this
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is what we want to use when linking a self-contained app. In
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the future we will want to generate these depending on the
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scenario in which the linker is invoked. -->
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<PropertyGroup>
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<ExtraLinkerArgs Condition=" '$(ExtraLinkerArgs)' == '' ">-t -c link -l none</ExtraLinkerArgs>
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</PropertyGroup>
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<ILLink AssemblyPaths="@(_ManagedAssembliesToLink)"
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RootAssemblyNames="@(LinkerRootAssemblies)"
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RootDescriptorFiles="@(LinkerRootDescriptors)"
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OutputDirectory="$(IntermediateLinkDir)"
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ExtraArgs="$(ExtraLinkerArgs)" />
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<Touch Files="$(_LinkSemaphore)" AlwaysCreate="true">
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<Output TaskParameter="TouchedFiles" ItemName="FileWrites" />
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</Touch>
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</Target>
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<!-- Computes the managed assemblies that are input to the
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linker. Includes managed assemblies from
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ResolvedAssembliesToPublish, and IntermediateAssembly. -->
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<Target Name="_ComputeManagedAssembliesToLink"
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DependsOnTargets="_ComputeManagedResolvedAssembliesToPublish">
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<ItemGroup>
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<_ManagedAssembliesToLink Include="@(IntermediateAssembly)" />
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<_ManagedAssembliesToLink Include="@(_ManagedResolvedAssembliesToPublish)" />
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</ItemGroup>
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</Target>
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<!-- Computes the managed subset of
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ResolvedAssembliesToPublish. This needs to preserve metadata,
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because it is later used to compute the linked assemblies with
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metadata that gets used by the rest of the publish
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pipeline. This needs to run even during incremental build,
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because we use the list of managed assemblies to filter the
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publish output. -->
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<UsingTask TaskName="ComputeManagedAssemblies" AssemblyFile="$(LinkTaskDllPath)" />
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<Target Name="_ComputeManagedResolvedAssembliesToPublish">
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<!-- TODO: Is there a better way to get the managed assemblies
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from ResolvedAssembliesToPublish? We may be able to check for
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AssetType="runtime" on managed assemblies - would that give
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the same set of assemblies? -->
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<ComputeManagedAssemblies Assemblies="@(ResolvedAssembliesToPublish)">
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<Output TaskParameter="ManagedAssemblies" ItemName="_ManagedResolvedAssembliesToPublish" />
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</ComputeManagedAssemblies>
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<!-- For now, hard-code System.Private.CoreLib.ni, the only .ni
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file we've been encountering. This is a special case matching
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how we compute the linker roots by default - we always root
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System.Private.CoreLib, so we want to keep it in the publish
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output and the generated deps.json file. Excluding it from
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_ManagedResolvedAssembliesToPublish will prevent it from
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getting filtered out of the publish output later.
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In the future we may want to detect ngen assemblies and
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filter them more robustly. -->
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<!-- TODO: Which .ni files do we expect to be in
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ResolvedAssembliesToPublish? -->
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<ItemGroup>
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<_ManagedResolvedAssembliesToPublish Remove="@(_ManagedResolvedAssembliesToPublish->WithMetadataValue('Filename', 'System.Private.CoreLib.ni'))" />
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</ItemGroup>
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</Target>
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<!-- Compute the assemblies the linker should mark as roots. By
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default, these are passed as "-a", but this is an
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implementation detail of the link task and should not be relied
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upon in general. In the future we may add other inputs to the
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link task to control how these are rooted.
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-->
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<!-- We may want to add an additional mode in which we root only the
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assembly we have built, rooting all entry points visible from
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the outside of the assembly. We need to discuss whether this
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even makes sense during publish, since typically libraries get
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packaged via "dotnet pack", and the pack task takes input from
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build, not from publish. Thus linking the library itself should
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be part of the build step or pack step, OR pack could be made
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to work on the publish output. -->
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<Target Name="_ComputeLinkerRootAssemblies"
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DependsOnTargets="_ComputeManagedResolvedAssembliesToPublish;_ComputePlatformLibraries">
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<!-- By default, roots are everything minus the framework
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assemblies (except for System.Private.CoreLib, which we
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always root for now). This doesn't include the intermediate
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assembly, because we root it separately using an xml file,
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which lets us explicitly root everything. -->
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<ItemGroup>
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<LinkerRootAssemblies Include="@(_ManagedResolvedAssembliesToPublish->'%(Filename)')" />
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<LinkerRootAssemblies Remove="@(PlatformLibraries->'%(Filename)')" />
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<LinkerRootAssemblies Include="System.Private.CoreLib" />
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</ItemGroup>
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</Target>
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<!-- Platform libraries are the managed runtime assets needed by the
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"platform", currently Microsoft.NETCore.App. -->
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<UsingTask TaskName="GetRuntimeLibraries" AssemblyFile="$(LinkTaskDllPath)" />
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<Target Name="_ComputePlatformLibraries">
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<GetRuntimeLibraries AssetsFilePath="$(ProjectAssetsFile)"
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TargetFramework="$(TargetFrameworkMoniker)"
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RuntimeIdentifier="$(RuntimeIdentifier)"
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PackageNames="$(MicrosoftNETPlatformLibrary)">
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<Output TaskParameter="RuntimeLibraries" ItemName="PlatformLibraries" />
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</GetRuntimeLibraries>
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</Target>
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<!-- This target prepares the LinkerRootDescriptors itemgroup for
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input to the link task. In addition to including user-specified
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LinkerRootDescriptors in the ItemGroup statically above, we
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dynamically include the generated descriptor files for the
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intermediate assembly. -->
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<Target Name="_ComputeLinkerRootDescriptors"
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DependsOnTargets="_GenerateIntermediateRootDescriptor">
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<ItemGroup>
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<LinkerRootDescriptors Include="$(_IntermediateRootDescriptorPath)" />
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</ItemGroup>
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</Target>
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<!-- Generates the xml root descriptor file that completely roots
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the intermediate assembly. -->
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<UsingTask TaskName="CreateRootDescriptorFile" AssemblyFile="$(LinkTaskDllPath)" />
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<Target Name="_GenerateIntermediateRootDescriptor"
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Inputs="@(IntermediateAssembly)"
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Outputs="$(_IntermediateRootDescriptorPath)">
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<CreateRootDescriptorFile AssemblyNames="@(IntermediateAssembly->'%(Filename)')"
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RootDescriptorFilePath="$(_IntermediateRootDescriptorPath)" />
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</Target>
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<!-- This target needs to remove from the publish deps file those
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assemblies that were excluded from the publish output by the
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linker. Currently it does so by rewriting the publish
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dependency file (as opposed to generating one without the
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excluded assemblies in the first place).
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TODO: update this to pass FilesToSkip to
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GeneratePublishDependencyFile once
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https://github.com/dotnet/sdk/pull/1052 is merged.
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-->
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<UsingTask TaskName="DepsJsonLinker" AssemblyFile="$(LinkTaskDllPath)" />
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<Target Name="_GenerateLinkedPublishDependencyFile"
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DependsOnTargets="_ComputeManagedAssembliesToLink;_ComputeLinkedAssemblies"
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AfterTargets="GeneratePublishDependencyFile"
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Condition=" '$(LinkDuringPublish)' == 'true' "
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Inputs="@(_ManagedResolvedAssembliesToPublish);@(_LinkedResolvedAssemblies);$(PublishDepsFilePath)"
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Outputs="$(_LinkDepsSemaphore)">
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<!-- DepsJsonLinker expects inputs in the form of filename.dll. -->
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<!-- We pass _ManagedResolvedAssembliesToPublish, which doesn't
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contain any .ni files. This correctly prevents stripping of
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the .ni files (which we want to continue publishing at the
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moment). -->
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<!-- This doesn't filter any assemblies from IntermediateAssembly,
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which should currently always be rooted by default. -->
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<DepsJsonLinker InputDepsFilePath="$(PublishDepsFilePath)"
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OutputDepsFilePath="$(PublishDepsFilePath)"
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ManagedPublishAssemblies="@(_ManagedResolvedAssembliesToPublish->'%(Filename)%(Extension)')"
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KeptAssemblies="@(_LinkedResolvedAssemblies->'%(Filename)%(Extension)')" />
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<Touch Files="$(_LinkDepsSemaphore)" AlwaysCreate="true">
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<Output TaskParameter="TouchedFiles" ItemName="FileWrites" />
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</Touch>
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</Target>
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</Project>
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