aspnetcore/eng/SourceBuild.props

<Project>

  <PropertyGroup>
    <GitHubRepositoryName>aspnetcore</GitHubRepositoryName>
    <SourceBuildManagedOnly>true</SourceBuildManagedOnly>
    <CloneSubmodulesToInnerSourceBuildRepo>false</CloneSubmodulesToInnerSourceBuildRepo>
  </PropertyGroup>

  <Target Name="PrepareGlobalJsonForSourceBuild"
          AfterTargets="PrepareInnerSourceBuildRepoRoot"
          BeforeTargets="RunInnerSourceBuildCommand">
    <Exec
      Command="./eng/scripts/prepare-sourcebuild-globaljson.sh"
      WorkingDirectory="$(InnerSourceBuildRepoRoot)" />
  </Target>

  <!--
    Init submodules - temporarary workaround for https://github.com/dotnet/sourcelink/pull/653
  -->
  <Target Name="InitSubmodules"
          DependsOnTargets="PrepareInnerSourceBuildRepoRoot"
          BeforeTargets="RunInnerSourceBuildCommand">

    <Exec
      Command="git submodule update --init --recursive"
      WorkingDirectory="$(InnerSourceBuildRepoRoot)"
      EnvironmentVariables="@(InnerBuildEnv)" />
  </Target>

  <!--
    Remove inner source .globalconfig file as both the inner and outer config files get loaded and cause a conflict.
    Leaving the inner will cause all conflicting settings to be ignored.
    https://docs.microsoft.com/en-us/dotnet/fundamentals/code-analysis/configuration-files#general-options
  -->
  <Target Name="RemoveInnerGlobalConfig"
          DependsOnTargets="PrepareInnerSourceBuildRepoRoot"
          BeforeTargets="RunInnerSourceBuildCommand">

    <Delete Files="$(InnerSourceBuildRepoRoot).globalconfig" />
  </Target>

  <!--
    Build RepoTasks - this is normally triggered via the build script but the inner ArPow source-build is run via msbuild
  -->
  <Target Name="BuildRepoTasks"
          Condition="'$(ArcadeInnerBuildFromSource)' == 'true'"
          BeforeTargets="Execute">

    <!-- If the alternative runtime location and key are present, pass those through -->
    <PropertyGroup>
      <_AdditionalRepoTaskBuildArgs />
      <_AdditionalRepoTaskBuildArgs Condition="'$(DotNetRuntimeSourceFeed)' != ''" >$(_AdditionalRepoTaskBuildArgs) --runtimesourcefeed $(DotNetRuntimeSourceFeed)</_AdditionalRepoTaskBuildArgs>
      <_AdditionalRepoTaskBuildArgs Condition="'$(DotNetRuntimeSourceFeedKey)' != ''" >$(_AdditionalRepoTaskBuildArgs) --runtimesourcefeedkey $(DotNetRuntimeSourceFeedKey)</_AdditionalRepoTaskBuildArgs>
    </PropertyGroup>

    <!-- Call the build.sh script to build the repo tasks. Set IgnoreStandardErrorWarningFormat
         to true. This avoids fatal errors, because in internal builds there are usually a few failed installation
         attempts as the install script walks through potential locations for a runtime.
         The overall build script will return a proper exit code, but we don't want to pick up the printed error messages. -->
    <Exec
      Command="./eng/build.sh --only-build-repo-tasks -bl $(_AdditionalRepoTaskBuildArgs)"
      IgnoreStandardErrorWarningFormat="true"
      WorkingDirectory="$(InnerSourceBuildRepoRoot)"
      EnvironmentVariables="@(InnerBuildEnv)" />
  </Target>

  <Target Name="CustomizeInnerBuildArgs"
          BeforeTargets="GetSourceBuildCommandConfiguration">

    <PropertyGroup>
      <InnerBuildArgs>$(InnerBuildArgs) /p:SourceBuildRuntimeIdentifier=$(TargetRuntimeIdentifier)</InnerBuildArgs>
    </PropertyGroup>
  </Target>

</Project>