Directory.Build.targets

<Project>
	<PropertyGroup>
		<_TransformRoot Condition="'$(_TransformRoot)'==''">$([System.IO.Path]::GetFullPath('$(MSBuildThisFileDirectory)'))</_TransformRoot>
		<_TransformOutputBase Condition="'$(_TransformOutputBase)'=='' and '$(dir-outputBase)'!=''">$(dir-outputBase)</_TransformOutputBase>
		<_TransformOutputBase Condition="'$(_TransformOutputBase)'==''">$([System.IO.Path]::Combine('$(_TransformRoot)','Output','$(Configuration)'))\</_TransformOutputBase>
		<_InstallerBuildProj>$([System.IO.Path]::Combine('$(_TransformRoot)','Build','InstallerBuild.proj'))</_InstallerBuildProj>
	</PropertyGroup>

	<!--
		EnsureTransformsForManagedBuilds — guarantee XSL transform DLLs are up-to-date
		before any managed project resolves assembly references.

		We always invoke BuildWindowsXslAssemblies and let MSBuild's native
		Inputs/Outputs incremental system decide whether recompilation is needed.
		Previously this target gated on !Exists(), which meant a stale DLL (older
		than source .xsl files) was never recompiled.
	-->
	<Target Name="EnsureTransformsForManagedBuilds"
		BeforeTargets="ResolveAssemblyReferences"
		Condition="!$([System.String]::IsNullOrEmpty('$(_TransformRoot)')) and '$(BuildingTransforms)'!='true' and '$(DesignTimeBuild)'!='true' and '$(OS)'=='Windows_NT' and $([System.IO.Path]::GetFullPath('$(MSBuildProjectFullPath)'))!='$(_InstallerBuildProj)'">

		<MSBuild
			Projects="$(_InstallerBuildProj)"
			Targets="BuildWindowsXslAssemblies"
			Properties="Configuration=$(Configuration);Platform=$(Platform);BuildingTransforms=true;dir-outputBase=$(_TransformOutputBase)"
			Condition="Exists('$(_InstallerBuildProj)')" />
	</Target>
</Project>