Move src/SourceBuild/tarball/* up one folder (#15166)

src/SourceBuild/content/repo-projects/fsharp.proj

@@ -0,0 +1,41 @@
+<Project>
+  <Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk" />
+
+  <PropertyGroup>
+    <BuildCommandArgs>$(StandardSourceBuildArgs)</BuildCommandArgs>
+    <BuildCommandArgs>$(BuildCommandArgs) /p:TreatWarningsAsErrors=false</BuildCommandArgs>
+    <!--
+      dotnet/fsharp has a custom eng/build.sh script that handles its own sourcebuild arg
+      differently from the ArcadeBuildFromSource MSBuild arg. Including both args is fine, but the
+      custom sourcebuild arg is the one that's required. This avoids running bootstrapping twice.
+    -->
+    <BuildCommandArgs>$(BuildCommandArgs) --sourcebuild</BuildCommandArgs>
+    <BuildCommand>$(StandardSourceBuildCommand) $(BuildCommandArgs)</BuildCommand>
+
+    <OutputPlacementRepoApiImplemented>false</OutputPlacementRepoApiImplemented>
+    <GlobalJsonFile>$(ProjectDirectory)global.json</GlobalJsonFile>
+    <NuGetConfigFile>$(ProjectDirectory)NuGet.config</NuGetConfigFile>
+    <LogVerbosityOptOut>true</LogVerbosityOptOut>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <RepositoryReference Include="arcade" />
+    <RepositoryReference Include="msbuild" /> 
+    <RepositoryReference Include="source-build-externals" />
+    <RepositoryReference Include="xliff-tasks" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <UseSourceBuiltSdkOverride Include="@(ArcadeSdkOverride)" />
+    <EnvironmentVariables Include="CheckEolTargetFramework=false" />
+  </ItemGroup>
+
+  <Target Name="SetArcadeSdkDir"
+          BeforeTargets="Build">
+    <ItemGroup>
+      <EnvironmentVariables Include="ArcadeSdkDir=$(SourceBuiltSdksDir)%(UseSourceBuiltSdkOverride.Identity)/" />
+    </ItemGroup>
+  </Target>
+
+  <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
+</Project>