From 65accfd5c3f7c151453b3805235fb320f63e99a7 Mon Sep 17 00:00:00 2001
From: David Federman <dfederm@microsoft.com>
Date: Mon, 22 Jul 2024 08:54:56 -0700
Subject: [PATCH] MSBuildCache: Allow duplicate outputs under "obj\*\vcpkg\**"
 (#17597)

---
 Directory.Build.props | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Directory.Build.props b/Directory.Build.props
index 312ae503ed4..03de869805a 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -41,6 +41,11 @@
     -->
     <MSBuildCacheIdenticalDuplicateOutputPatterns>$(MSBuildCacheIdenticalDuplicateOutputPatterns);bin\**</MSBuildCacheIdenticalDuplicateOutputPatterns>
 
+    <!-- 
+      vcpkg is invoked for each and every vcxproj and each invocation uses the same base dir for logging, so allow these duplicate "outputs".
+    -->
+    <MSBuildCacheIdenticalDuplicateOutputPatterns>$(MSBuildCacheIdenticalDuplicateOutputPatterns);obj\*\vcpkg\**</MSBuildCacheIdenticalDuplicateOutputPatterns>
+
     <!-- version of MSBuildCache is not part of the cache key -->
     <PackagesConfigFile>$(MSBuildThisFileDirectory)\dep\nuget\packages.config</PackagesConfigFile>
     <MSBuildCacheIgnoredInputPatterns>$(MSBuildCacheIgnoredInputPatterns);$(PackagesConfigFile)</MSBuildCacheIgnoredInputPatterns>