Microsoft.NET.ConflictResolution.targets

<!--
***********************************************************************************************
Microsoft.NET.ConflictResolution.targets

WARNING:  DO NOT MODIFY this file unless you are knowledgeable about MSBuild and have
          created a backup copy.  Incorrect changes to this file will make it
          impossible to load or build your projects from the command-line or the IDE.

Copyright (c) .NET Foundation. All rights reserved. 
***********************************************************************************************
-->

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <PropertyGroup>
    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
  </PropertyGroup>

  <Import Project="Microsoft.NET.DefaultPackageConflictOverrides.targets" />

  <UsingTask TaskName="ResolvePackageFileConflicts" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />
  <Target Name="_HandlePackageFileConflicts" DependsOnTargets="_ComputeLockFileCopyLocal;GetReferenceAssemblyPaths">
    
    <ItemGroup>
      <!-- We need to find all the files that will be loaded from deps for conflict resolution.
          To do this, we look at the files that would be copied local when CopyLocalLockFileAssemblies is true.
          However, if CopyLocalLockFileAssemblies is true, then we don't add these items, as they
          will always be included in ReferenceCopyLocalPaths.
          -->
      <_LockFileAssemblies Include="@(AllCopyLocalItems->WithMetadataValue('Type', 'assembly'))"
                           Condition="'$(CopyLocalLockFileAssemblies)' != 'true'"
                           />

      
      <!-- Also include RuntimeTarget items, which aren't included in AllCopyLocalItems, but need to be considered
           for conflict resolution.  Set DestinationSubPath for these items so that conflict resolution will consider
           that path (for example "runtimes/win/lib/netstandard1.3/System.Diagnostics.TraceSource.dll" when looking
           for conflicts). -->
      <_RuntimeTargetItems Include="@(_ActiveTFMFileDependencies->WithMetadataValue('FileGroup', 'RuntimeTarget'))" />
    </ItemGroup>
    
    <JoinItems Left="@(_RuntimeTargetItems)" Right="@(FileDefinitions)" RightMetadata="*">
      <Output TaskParameter="JoinResult" ItemName="_RuntimeTargetPublishItems" />
    </JoinItems>
    
    <ItemGroup>
      <_RuntimeTargetPublishItems Update="@(_RuntimeTargetPublishItems)"
                                  DestinationSubPath="%(Path)" />

      <_LockFileAssemblies Include="@(_RuntimeTargetPublishItems->WithMetadataValue('Type', 'assembly')->'%(ResolvedPath)')">
        <Private>false</Private>
        <NuGetIsFrameworkReference>false</NuGetIsFrameworkReference>
        <NuGetSourceType>Package</NuGetSourceType>
        <NuGetPackageId>%(PackageName)</NuGetPackageId>
        <NuGetPackageVersion>%(PackageVersion)</NuGetPackageVersion>
      </_LockFileAssemblies>
    </ItemGroup>

    <ResolvePackageFileConflicts References="@(Reference)"
                                 ReferenceCopyLocalPaths="@(ReferenceCopyLocalPaths)"
                                 OtherRuntimeItems="@(_LockFileAssemblies)"
                                 PlatformManifests="@(PackageConflictPlatformManifests)"
                                 TargetFrameworkDirectories="$(TargetFrameworkDirectory)"
                                 PackageOverrides="@(PackageConflictOverrides)"
                                 PreferredPackages="$(PackageConflictPreferredPackages)">
      <Output TaskParameter="ReferencesWithoutConflicts" ItemName="_ReferencesWithoutConflicts" />
      <Output TaskParameter="ReferenceCopyLocalPathsWithoutConflicts" ItemName="_ReferenceCopyLocalPathsWithoutConflicts" />
      <Output TaskParameter="Conflicts" ItemName="_ConflictPackageFiles" />
    </ResolvePackageFileConflicts>

    <!-- Replace Reference / ReferenceCopyLocalPaths with the filtered lists.
         We must remove all and include rather than just remove since removal is based
         only on ItemSpec and duplicate ItemSpecs may exist with different metadata 
         (eg: HintPath) -->
    <ItemGroup>
      <Reference Remove="@(Reference)" />
      <Reference Include="@(_ReferencesWithoutConflicts)" />
      <ReferenceCopyLocalPaths Remove="@(ReferenceCopyLocalPaths)" />
      <ReferenceCopyLocalPaths Include="@(_ReferenceCopyLocalPathsWithoutConflicts)" />
    </ItemGroup>
  </Target>

  <Target Name="_HandlePublishFileConflicts" AfterTargets="RunResolvePublishAssemblies"
          DependsOnTargets="GetReferenceAssemblyPaths">
    <ResolvePackageFileConflicts ReferenceCopyLocalPaths="@(ResolvedAssembliesToPublish)"
                                PlatformManifests="@(PackageConflictPlatformManifests)"
                                TargetFrameworkDirectories="$(TargetFrameworkDirectory)"
                                PreferredPackages="$(PackageConflictPreferredPackages)">
      <Output TaskParameter="ReferenceCopyLocalPathsWithoutConflicts" ItemName="_ResolvedAssembliesToPublishWithoutConflicts" />
      <Output TaskParameter="Conflicts" ItemName="_PublishConflictPackageFiles" />
    </ResolvePackageFileConflicts>
    <ItemGroup>
      <ResolvedAssembliesToPublish Remove="@(ResolvedAssembliesToPublish)" />
      <ResolvedAssembliesToPublish Include="@(_ResolvedAssembliesToPublishWithoutConflicts)" />
    </ItemGroup>
  </Target>
</Project>