Microsoft.NET.Sdk.FrameworkReferenceResolution.targets

<!--
***********************************************************************************************
Microsoft.NET.Sdk.FrameworkReferenceResolution.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>
  <PropertyGroup>
    <ResolveAssemblyReferencesDependsOn>
      $(ResolveAssemblyReferencesDependsOn);
      ResolveTargetingPackAssets;
    </ResolveAssemblyReferencesDependsOn>
  </PropertyGroup>

  <UsingTask TaskName="CreateWindowsSdkKnownFrameworkReferences" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />
  <UsingTask TaskName="CheckForDuplicateFrameworkReferences" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />
  <UsingTask TaskName="ProcessFrameworkReferences" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />
  <UsingTask TaskName="ResolveAppHosts" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />

  <Target Name="AddWindowsSdkKnownFrameworkReferences"
          Condition="'$(TargetFrameworkIdentifier)' == '.NETCoreApp' And '$(TargetPlatformIdentifier)' == 'Windows'">

    <!-- Remove Windows SDK KnownFrameworkReference items from BundledVersions.props (they will eventually be removed, but that is in a different repo so
         we can't do the change atomically -->
    <ItemGroup>
      <KnownFrameworkReference Remove="Microsoft.Windows.SDK.NET.Ref" />
    </ItemGroup>
    
    <!-- Generate KnownFrameworkReference items for the Windows SDK pack -->
    <CreateWindowsSdkKnownFrameworkReferences
      UseWindowsSDKPreview="$(UseWindowsSDKPreview)"
      WindowsSdkPackageVersion="$(WindowsSdkPackageVersion)"
      TargetFrameworkIdentifier="$(TargetFrameworkIdentifier)"
      TargetFrameworkVersion="$(_TargetFrameworkVersionWithoutV)"
      TargetPlatformIdentifier="$(TargetPlatformIdentifier)"
      TargetPlatformVersion="$(TargetPlatformVersion)"
      WindowsSdkSupportedTargetPlatformVersions="@(WindowsSdkSupportedTargetPlatformVersion)">

      <Output TaskParameter="KnownFrameworkReferences" ItemName="KnownFrameworkReference" />
      
    </CreateWindowsSdkKnownFrameworkReferences>
  </Target>

  <!--
    ============================================================
                                        ProcessFrameworkReferences

    Matches FrameworkReference items with KnownFrameworkReference items to determine the corresponding
    targeting pack and if necessary the runtime pack.  If the packs aren't available in the NetCoreTargetingPackRoot
    folder, then generate PackageDownload items in order to download the packs during restore.

    Also resolves app host packs in a similar fashion, and checks for duplicate FrameworkReference items.
    ============================================================
    -->

  <Target Name="ProcessFrameworkReferences" BeforeTargets="_CheckForInvalidConfigurationAndPlatform;CollectPackageReferences;CollectPackageDownloads"
          DependsOnTargets="AddWindowsSdkKnownFrameworkReferences"
          Condition="'@(FrameworkReference)' != ''">

    <CheckForDuplicateFrameworkReferences
        FrameworkReferences="@(FrameworkReference)"
        MoreInformationLink="https://aka.ms/sdkimplicitrefs">
      <Output TaskParameter="ItemsToRemove" ItemName="_FrameworkReferenceToRemove" />
      <Output TaskParameter="ItemsToAdd" ItemName="_FrameworkReferenceToAdd" />
    </CheckForDuplicateFrameworkReferences>

    <ItemGroup>
      <FrameworkReference Remove="@(_FrameworkReferenceToRemove)" />
      <FrameworkReference Include="@(_FrameworkReferenceToAdd)" />
    </ItemGroup>

    <PropertyGroup>
      <EnableTargetingPackDownload Condition="'$(EnableTargetingPackDownload)' == ''">true</EnableTargetingPackDownload>
      <EnableRuntimePackDownload Condition="'$(EnableRuntimePackDownload)' == ''">true</EnableRuntimePackDownload>
    </PropertyGroup>

    <PropertyGroup>
      <_NuGetRestoreSupported Condition="('$(Language)' == 'C++' and '$(_EnablePackageReferencesInVCProjects)' != 'true')">false</_NuGetRestoreSupported>
    </PropertyGroup>

    <ItemGroup>
      <_PackAsToolShimRuntimeIdentifiers Condition="@(_PackAsToolShimRuntimeIdentifiers) ==''" Include="$(PackAsToolShimRuntimeIdentifiers)"/>
    </ItemGroup>

    <ProcessFrameworkReferences FrameworkReferences="@(FrameworkReference)"
                                KnownFrameworkReferences="@(KnownFrameworkReference)"
                                KnownRuntimePacks="@(KnownRuntimePack)"
                                TargetFrameworkIdentifier="$(TargetFrameworkIdentifier)"
                                TargetFrameworkVersion="$(_TargetFrameworkVersionWithoutV)"
                                TargetPlatformIdentifier="$(TargetPlatformIdentifier)"
                                TargetPlatformVersion="$(TargetPlatformVersion)"
                                TargetingPackRoot="$(NetCoreTargetingPackRoot)"
                                RuntimeGraphPath="$(BundledRuntimeIdentifierGraphFile)"
                                SelfContained="$(SelfContained)"
                                ReadyToRunEnabled="$(PublishReadyToRun)"
                                ReadyToRunUseCrossgen2="$(PublishReadyToRunUseCrossgen2)"
                                RuntimeIdentifier="$(RuntimeIdentifier)"
                                RuntimeIdentifiers="$(RuntimeIdentifiers)"
                                RuntimeFrameworkVersion="$(RuntimeFrameworkVersion)"
                                TargetLatestRuntimePatch="$(TargetLatestRuntimePatch)"
                                TargetLatestRuntimePatchIsDefault="$(_TargetLatestRuntimePatchIsDefault)"
                                EnableTargetingPackDownload="$(EnableTargetingPackDownload)"
                                EnableRuntimePackDownload="$(EnableRuntimePackDownload)"
                                KnownCrossgen2Packs="@(KnownCrossgen2Pack)"
                                NETCoreSdkRuntimeIdentifier="$(NETCoreSdkRuntimeIdentifier)"
                                NetCoreRoot="$(NetCoreRoot)"
                                NETCoreSdkVersion="$(NETCoreSdkVersion)">

      <Output TaskParameter="PackagesToDownload" ItemName="_PackageToDownload" />
      <Output TaskParameter="RuntimeFrameworks" ItemName="RuntimeFramework" />
      <Output TaskParameter="TargetingPacks" ItemName="TargetingPack" />
      <Output TaskParameter="RuntimePacks" ItemName="RuntimePack" />
      <Output TaskParameter="Crossgen2Packs" ItemName="Crossgen2Pack" />
      <Output TaskParameter="UnavailableRuntimePacks" ItemName="UnavailableRuntimePack" />

    </ProcessFrameworkReferences>

    <PropertyGroup Condition="'$(AppHostRuntimeIdentifier)' == '' And
                              ('$(UseAppHost)' == 'true' Or '$(EnableComHosting)' == 'true' Or '$(UseIJWHost)' == 'true')">
      <AppHostRuntimeIdentifier>$(RuntimeIdentifier)</AppHostRuntimeIdentifier>
      <AppHostRuntimeIdentifier Condition="'$(AppHostRuntimeIdentifier)' == ''">$(DefaultAppHostRuntimeIdentifier)</AppHostRuntimeIdentifier>
    </PropertyGroup>

    <ResolveAppHosts TargetFrameworkIdentifier="$(TargetFrameworkIdentifier)"
                     TargetFrameworkVersion="$(_TargetFrameworkVersionWithoutV)"
                     TargetingPackRoot="$(NetCoreTargetingPackRoot)"
                     AppHostRuntimeIdentifier="$(AppHostRuntimeIdentifier)"
                     OtherRuntimeIdentifiers="$(RuntimeIdentifiers)"
                     RuntimeFrameworkVersion="$(RuntimeFrameworkVersion)"
                     PackAsToolShimRuntimeIdentifiers="@(_PackAsToolShimRuntimeIdentifiers)"
                     DotNetAppHostExecutableNameWithoutExtension="$(_DotNetAppHostExecutableNameWithoutExtension)"
                     DotNetSingleFileHostExecutableNameWithoutExtension="$(_DotNetSingleFileHostExecutableNameWithoutExtension)"
                     DotNetComHostLibraryNameWithoutExtension="$(_DotNetComHostLibraryNameWithoutExtension)"
                     DotNetIjwHostLibraryNameWithoutExtension="$(_DotNetIjwHostLibraryNameWithoutExtension)"
                     RuntimeGraphPath="$(BundledRuntimeIdentifierGraphFile)"
                     KnownAppHostPacks="@(KnownAppHostPack)"
                     NuGetRestoreSupported="$(_NuGetRestoreSupported)"
                     NetCoreTargetingPackRoot="$(NetCoreTargetingPackRoot)">

      <Output TaskParameter="PackagesToDownload" ItemName="_PackageToDownload" />
      <Output TaskParameter="AppHost" ItemName="AppHostPack" />
      <Output TaskParameter="SingleFileHost" ItemName="SingleFileHostPack" />
      <Output TaskParameter="ComHost" ItemName="ComHostPack" />
      <Output TaskParameter="IjwHost" ItemName="IjwHostPack" />
      <Output TaskParameter="PackAsToolShimAppHostPacks" ItemName="PackAsToolShimAppHostPack" />

    </ResolveAppHosts>

    <PropertyGroup Condition="'$(UsePackageDownload)' == ''">
      <UsePackageDownload Condition="'$(MSBuildRuntimeType)' == 'Core'">true</UsePackageDownload>
      <UsePackageDownload Condition="'$(PackageDownloadSupported)' == 'true'">true</UsePackageDownload>
      <UsePackageDownload Condition="'$(UsePackageDownload)' == ''">false</UsePackageDownload>
    </PropertyGroup>

    <ItemGroup Condition="'$(UsePackageDownload)' == 'true'">
      <PackageDownload Include="@(_PackageToDownload)">
        <Version>[%(_PackageToDownload.Version)]</Version>
      </PackageDownload>
    </ItemGroup>

    <ItemGroup Condition="'$(UsePackageDownload)' != 'true'">
      <PackageReference Include="@(_PackageToDownload)"
                        IsImplicitlyDefined="true"
                        PrivateAssets="all"
                        ExcludeAssets="all" />
    </ItemGroup>
  </Target>

  <!--
    ============================================================
                                        AddTransitiveFrameworkReferences

    Adds FrameworkReference items for shared frameworks which weren't directly referenced,
    but were referenced transitively via a project or package reference.  NuGet writes these
    to the assets file, and the ResolvePackageAssets target adds them to the TransitiveFrameworkReference
    item.  Here, we add them to FrameworkReference if they aren't already referenced.
    We add a transitive attribute to the FrameworkReferences so NuGet can filter them out from CollectFrameworkReferences.
    ============================================================
    -->
  <Target Name="AddTransitiveFrameworkReferences" AfterTargets="ResolvePackageAssets"
          Condition="'@(TransitiveFrameworkReference)' != ''" >

    <ItemGroup>
      <FrameworkReference Include="@(TransitiveFrameworkReference)" Exclude="@(FrameworkReference)"
                          IsTransitiveFrameworkReference="true" />
    </ItemGroup>

  </Target>

  <UsingTask TaskName="ResolveFrameworkReferences" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />

  <!--
    ============================================================
                                        ResolveFrameworkReferences

    Resolves paths to various FrameworkReference-related items (targeting packs, runtime packs,
    app host packs).  Some of these may already have had the path set if they were in the
    NetCoreTargetingPackRoot folder.  Others which were downloaded as NuGet packages will
    need to have the path set here.
    ============================================================
    -->
  <Target Name="ResolveFrameworkReferences" DependsOnTargets="ProcessFrameworkReferences;ResolvePackageAssets"
          Condition="'@(FrameworkReference)' != ''"
          Returns="@(ResolvedFrameworkReference)">

    <GetPackageDirectory
      Items="@(TargetingPack)"
      PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="ResolvedTargetingPack" />

    </GetPackageDirectory>

    <ItemGroup>
      <ResolvedTargetingPack Condition="'%(ResolvedTargetingPack.Path)' == '' and '%(ResolvedTargetingPack.PackageDirectory)' != ''">
        <Path>%(ResolvedTargetingPack.PackageDirectory)</Path>
      </ResolvedTargetingPack>
    </ItemGroup>

    <GetPackageDirectory
      Items="@(AppHostPack)"
      PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="ResolvedAppHostPack" />

    </GetPackageDirectory>

    <GetPackageDirectory
      Items="@(SingleFileHostPack)"
      PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="ResolvedSingleFileHostPack" />

    </GetPackageDirectory>

    <GetPackageDirectory
      Items="@(Crossgen2Pack)"
      PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="ResolvedCrossgen2Pack" />

    </GetPackageDirectory>

    <GetPackageDirectory
      Items="@(PackAsToolShimAppHostPack)"
      PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="_ApphostsForShimRuntimeIdentifiersGetPackageDirectory" />

    </GetPackageDirectory>

    <GetPackageDirectory
      Items="@(ComHostPack)"
      PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="ResolvedComHostPack" />

    </GetPackageDirectory>

    <GetPackageDirectory
     Items="@(IjwHostPack)"
     PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="ResolvedIjwHostPack" />
    </GetPackageDirectory>

    <ItemGroup>
      <_ApphostsForShimRuntimeIdentifiers Include="%(_ApphostsForShimRuntimeIdentifiersGetPackageDirectory.PackageDirectory)\%(_ApphostsForShimRuntimeIdentifiersGetPackageDirectory.PathInPackage)" >
        <RuntimeIdentifier>%(_ApphostsForShimRuntimeIdentifiersGetPackageDirectory.RuntimeIdentifier)</RuntimeIdentifier>
      </_ApphostsForShimRuntimeIdentifiers>
    </ItemGroup>

    <ItemGroup>
      <ResolvedAppHostPack Condition="'%(ResolvedAppHostPack.Path)' == '' and '%(ResolvedAppHostPack.PackageDirectory)' != ''">
        <Path>%(ResolvedAppHostPack.PackageDirectory)\%(ResolvedAppHostPack.PathInPackage)</Path>
      </ResolvedAppHostPack>
    </ItemGroup>

    <PropertyGroup Condition="'@(ResolvedAppHostPack)' != '' And '$(AppHostSourcePath)' == ''">
      <AppHostSourcePath>@(ResolvedAppHostPack->'%(Path)')</AppHostSourcePath>
    </PropertyGroup>

    <ItemGroup>
      <ResolvedSingleFileHostPack Condition="'%(ResolvedSingleFileHostPack.Path)' == '' and '%(ResolvedSingleFileHostPack.PackageDirectory)' != ''">
        <Path>%(ResolvedSingleFileHostPack.PackageDirectory)\%(ResolvedSingleFileHostPack.PathInPackage)</Path>
      </ResolvedSingleFileHostPack>
    </ItemGroup>

    <PropertyGroup Condition="'@(ResolvedSingleFileHostPack)' != '' And '$(SingleFileHostSourcePath)' == ''">
      <SingleFileHostSourcePath>@(ResolvedSingleFileHostPack->'%(Path)')</SingleFileHostSourcePath>
    </PropertyGroup>

    <ItemGroup>
      <ResolvedComHostPack Condition="'%(ResolvedComHostPack.Path)' == '' and '%(ResolvedComHostPack.PackageDirectory)' != ''">
        <Path>%(ResolvedComHostPack.PackageDirectory)\%(ResolvedComHostPack.PathInPackage)</Path>
      </ResolvedComHostPack>
    </ItemGroup>

    <PropertyGroup Condition="'@(ResolvedComHostPack)' != '' And '$(ComHostSourcePath)' == ''">
      <ComHostSourcePath>@(ResolvedComHostPack->'%(Path)')</ComHostSourcePath>
    </PropertyGroup>

    <ItemGroup>
      <ResolvedIjwHostPack Condition="'%(ResolvedIjwHostPack.Path)' == '' and '%(ResolvedIjwHostPack.PackageDirectory)' != ''">
        <Path>%(ResolvedIjwHostPack.PackageDirectory)\%(ResolvedIjwHostPack.PathInPackage)</Path>
      </ResolvedIjwHostPack>
    </ItemGroup>

    <PropertyGroup Condition="'@(ResolvedIjwHostPack)' != '' And '$(IjwHostSourcePath)' == ''">
      <IjwHostSourcePath>@(ResolvedIjwHostPack->'%(Path)')</IjwHostSourcePath>
    </PropertyGroup>

    <GetPackageDirectory
      Items="@(RuntimePack)"
      PackageFolders="@(AssetsFilePackageFolder)">

      <Output TaskParameter="Output" ItemName="ResolvedRuntimePack" />

    </GetPackageDirectory>

    <ResolveFrameworkReferences
      FrameworkReferences="@(FrameworkReference)"
      ResolvedTargetingPacks="@(ResolvedTargetingPack)"
      ResolvedRuntimePacks="@(ResolvedRuntimePack)">

      <Output TaskParameter="ResolvedFrameworkReferences" ItemName="ResolvedFrameworkReference" />

    </ResolveFrameworkReferences>

  </Target>

  <UsingTask TaskName="GetPackageDirectory" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />
  <UsingTask TaskName="ResolveTargetingPackAssets" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />

  <!--
    ============================================================
                                        ResolveTargetingPackAssets

    Resolve assets (primarily references) from targeting packs.
    ============================================================
    -->
  <Target Name="ResolveTargetingPackAssets" DependsOnTargets="ResolveFrameworkReferences"
          Condition="'@(FrameworkReference)' != ''">

    <!-- For design-time builds, don't generate an error if a targeting pack isn't available (ie because it hasn't been restored yet) -->
    <PropertyGroup Condition="'$(GenerateErrorForMissingTargetingPacks)' == ''">
      <GenerateErrorForMissingTargetingPacks>true</GenerateErrorForMissingTargetingPacks>
      <GenerateErrorForMissingTargetingPacks Condition="'$(DesignTimeBuild)' == 'true'">false</GenerateErrorForMissingTargetingPacks>
    </PropertyGroup>

    <ResolveTargetingPackAssets FrameworkReferences="@(FrameworkReference)"
                                ProjectLanguage="$(Language)"
                                ResolvedTargetingPacks="@(ResolvedTargetingPack)"
                                RuntimeFrameworks="@(RuntimeFramework)"
                                GenerateErrorForMissingTargetingPacks="$(GenerateErrorForMissingTargetingPacks)"
                                NuGetRestoreSupported="$(_NuGetRestoreSupported)"
                                NetCoreTargetingPackRoot="$(NetCoreTargetingPackRoot)">
      <Output TaskParameter="ReferencesToAdd" ItemName="Reference" />
      <Output TaskParameter="AnalyzersToAdd" ItemName="Analyzer" />
      <Output TaskParameter="PlatformManifests" ItemName="PlatformManifestsFromTargetingPacks" />
      <Output TaskParameter="PackageConflictPreferredPackages" PropertyName="PackageConflictPreferredPackages" />
      <Output TaskParameter="PackageConflictOverrides" ItemName="PackageConflictOverrides" />
      <Output TaskParameter="UsedRuntimeFrameworks" ItemName="_UsedRuntimeFramework" />

    </ResolveTargetingPackAssets>

    <ItemGroup Condition="'$(RuntimeIdentifier)' == '' or '$(SelfContained)' != 'true'">
      <PackageConflictPlatformManifests Include="@(PlatformManifestsFromTargetingPacks)" />
    </ItemGroup>

    <ItemGroup>
      <RuntimeFramework Remove="@(RuntimeFramework)" />
      <RuntimeFramework Include="@(_UsedRuntimeFramework)" />
    </ItemGroup>
  </Target>

  <UsingTask TaskName="ResolveRuntimePackAssets" AssemblyFile="$(MicrosoftNETBuildTasksAssembly)" />

  <!--
    ============================================================
                                        IncludeTargetingPackReference

    Add package reference for required targeting pack if necessary
    ============================================================
    -->
  <Target Name="IncludeTargetingPackReference" BeforeTargets="_CheckForInvalidConfigurationAndPlatform;CollectPackageReferences;CheckForImplicitPackageReferenceOverrides"
          Condition="'$(TargetFrameworkMoniker)' != '' and '$(TargetFrameworkIdentifier)' == '.NETFramework' and '$(AutomaticallyUseReferenceAssemblyPackages)' == 'true'">
    <GetReferenceAssemblyPaths
        TargetFrameworkMoniker="$(TargetFrameworkMoniker)"
        RootPath="$(TargetFrameworkRootPath)"
        TargetFrameworkFallbackSearchPaths="$(TargetFrameworkFallbackSearchPaths)"
        BypassFrameworkInstallChecks="true"
        SuppressNotFoundError="true">
      <Output TaskParameter="FullFrameworkReferenceAssemblyPaths" PropertyName="_FullFrameworkReferenceAssemblyPaths"/>
    </GetReferenceAssemblyPaths>


    <ItemGroup>
      <_ExistingReferenceAssembliesPackageReference Include="@(PackageReference)" Condition="'%(PackageReference.Identity)' == 'Microsoft.NETFramework.ReferenceAssemblies'"/>

      <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="$(MicrosoftNETFrameworkReferenceAssembliesLatestPackageVersion)" IsImplicitlyDefined="true" PrivateAssets="All"
                        Condition="'$(_FullFrameworkReferenceAssemblyPaths)' == '' and '@(_ExistingReferenceAssembliesPackageReference)' == ''"/>
    </ItemGroup>
  </Target>

  <!--
    ============================================================
                                        ResolveRuntimePackAssets

    Resolve assets from runtime packs.
    ============================================================
    -->
  <Target Name="ResolveRuntimePackAssets" DependsOnTargets="ResolveFrameworkReferences"
          Condition="'@(RuntimePack)' != ''">

    <ResolveRuntimePackAssets FrameworkReferences="@(FrameworkReference)"
                              ResolvedRuntimePacks="@(ResolvedRuntimePack)"
                              UnavailableRuntimePacks="@(UnavailableRuntimePack)"
                              SatelliteResourceLanguages="$(SatelliteResourceLanguages)"
                              DesignTimeBuild="$(DesignTimeBuild)">
      <Output TaskParameter="RuntimePackAssets" ItemName="RuntimePackAsset" />
    </ResolveRuntimePackAssets>

    <ItemGroup>
      <ReferenceCopyLocalPaths Include="@(RuntimePackAsset)"
                               Condition="'$(CopyLocalLockFileAssemblies)' == 'true' and ('$(SelfContained)' == 'true' or '%(RuntimePackAsset.RuntimePackAlwaysCopyLocal)' == 'true') and '%(RuntimePackAsset.AssetType)' != 'pgodata'" />
    </ItemGroup>


  </Target>

  <!--
    Adds metadata so the SDK will generate the UserSecretsIdAttribute.

    This is associated with ASP.NET Core, but may be used in projects that don't use the Web SDK (especially test projects).
    So it is in the base .NET SDK.  (It used to be in the Microsoft.AspNetCore.App package, but now that that's a targeting
    pack we don't support importing build logic from it directly).

    If GeneratedUserSecretsAttributeFile is set, that means Microsoft.Extensions.Configuration.UserSecrets 2.1
    or earlier was referenced as a package. This didn't use the AssemblyAttribute item group, so we cannot
    avoid duplicate AssemblyAttribute items without skipping this target altogether..
  -->
  <Target Name="_GetUserSecretsAssemblyAttribute"
          BeforeTargets="GetAssemblyAttributes"
          Condition=" '$(UserSecretsId)' != '' AND '$(GenerateUserSecretsAttribute)' != 'false' AND '$(GeneratedUserSecretsAttributeFile)' == '' ">

    <!--
      If the Microsoft.Extensions.Configuration.UserSecrets package 2.2 or higher is referenced directly,
      it will also add an AssemblyAttribute item. Since this attribute only allows one per assembly, do not
      duplicate the item.

      Also don't add the attribute if there is neither a Microsoft.AspNetCore.App FrameworkReference nor a
      Microsoft.Extensions.Configuration.UserSecrets PackageReference, in order to preserve 2.x SDK behavior
      where projects would successfully build if they define the UserSecretsId property but don't reference
      the corresponding API.

    -->
     <ItemGroup Condition=" @(AssemblyAttribute->WithMetadataValue('Identity', 'Microsoft.Extensions.Configuration.UserSecrets.UserSecretsIdAttribute')->Count()) == 0 And
                            (@(FrameworkReference->WithMetadataValue('Identity', 'Microsoft.AspNetCore.App')->Count()) != 0 Or
                            @(PackageReference->WithMetadataValue('Identity', 'Microsoft.Extensions.Configuration.UserSecrets')->Count()) != 0)">
      <AssemblyAttribute Include="Microsoft.Extensions.Configuration.UserSecrets.UserSecretsIdAttribute">
        <_Parameter1>$(UserSecretsId.Trim())</_Parameter1>
      </AssemblyAttribute>
    </ItemGroup>
  </Target>

</Project>