From dd2754c2c956578ec02788713a1ebf1510f1cb5a Mon Sep 17 00:00:00 2001
From: Javier Calvarro Nelson <jacalvar@microsoft.com>
Date: Thu, 15 Oct 2020 07:29:45 +0200
Subject: [PATCH] Fix up to date check (#26891)

Description
We had support for the UpToDateCheck in Visual Studio with CSS isolation but the target was not being run at design time. This change introduces a new target that runs at design time and makes sure the UpToDateCheckInput and UpToDateCheckBuilt ItemGroups are populated.

Customer Impact
When using CSS isolation from within Visual Studio, a change in a scoped CSS file is not picked up and the project is not rebuilt as a result.
Regression?
No. This feature was introduced in 5.0.

Risk
Low. The new target we added only runs as part of Visual Studio builds.

Fixes
#26843
---
 .../netstandard2.0/Microsoft.NET.Sdk.Razor.ScopedCss.targets | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.ScopedCss.targets b/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.ScopedCss.targets
index ee8d39a208..72eeec856d 100644
--- a/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.ScopedCss.targets
+++ b/src/Razor/Microsoft.NET.Sdk.Razor/src/build/netstandard2.0/Microsoft.NET.Sdk.Razor.ScopedCss.targets
@@ -171,6 +171,11 @@ Integration with static web assets:
 
 </Target>
 
+<Target
+    Name="_ResolveScopedCssOutputsDesignTime"
+    DependsOnTargets="_ResolveScopedCssOutputs"
+    BeforeTargets="CollectUpToDateCheckInputDesignTime;CollectUpToDateCheckBuiltDesignTime" />
+
 <!-- Transforms the original scoped CSS files into their scoped versions on their designated output paths -->
 <Target Name="_GenerateScopedCssFiles" Inputs="@(_ScopedCss)" Outputs="@(_ScopedCssOutputs)" DependsOnTargets="_ResolveScopedCssOutputs">