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[main] Avoid ApplyOptimizations if up to date #77944

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Apr 1, 2025
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[main] Avoid ApplyOptimizations if up to date #77944

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22 changes: 22 additions & 0 deletions eng/targets/Imports.targets
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Original file line number Diff line number Diff line change
Expand Up @@ -401,4 +401,26 @@
<Target Name="Workaround_CopyResolvedFilesToPublishPreserveNewest" BeforeTargets="_CopyResolvedFilesToPublishPreserveNewest" DependsOnTargets="GenerateManifests" />

<Import Project="DoNotGenerateSatelliteAssemblies_Workaround.targets" Condition="'$(GenerateSatelliteAssemblies)' == 'false'" />

<!--
This target uses Inputs/Outputs so when it is skipped because they are up to date, ApplyOptimizations is skipped.
This is a workaround for https://github.com/dotnet/roslyn/issues/77941.
-->
<Target Name="_DisableApplyOptimizations"
BeforeTargets="_InitializeAssemblyOptimizationWithTargetAssembly">
<PropertyGroup>
<EnableNgenOptimization>false</EnableNgenOptimization>
</PropertyGroup>
</Target>
<Target Name="_DetermineIfApplyOptimizationsShouldBeDisabled"
AfterTargets="_DisableApplyOptimizations"
Inputs="$(MSBuildAllProjects);@(IntermediateAssembly)"
Outputs="@(IntermediateAssembly);$(PostCompileBinaryModificationSentinelFile)">
<CallTarget Targets="_EnableApplyOptimizations" />
</Target>
<Target Name="_EnableApplyOptimizations">
<PropertyGroup>
<EnableNgenOptimization>true</EnableNgenOptimization>
</PropertyGroup>
</Target>
</Project>