From 0d459e5e0881ea3924139622f5db6a9fc9c8533c Mon Sep 17 00:00:00 2001
From: Will Godbe <wigodbe@microsoft.com>
Date: Wed, 9 Sep 2020 09:42:16 -0700
Subject: [PATCH] Strip duplicate files from SharedFx input to Nuget Pack

---
 .../src/Microsoft.AspNetCore.App.Runtime.csproj          | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/Framework/App.Runtime/src/Microsoft.AspNetCore.App.Runtime.csproj b/src/Framework/App.Runtime/src/Microsoft.AspNetCore.App.Runtime.csproj
index f642976df34c..096f7df9da01 100644
--- a/src/Framework/App.Runtime/src/Microsoft.AspNetCore.App.Runtime.csproj
+++ b/src/Framework/App.Runtime/src/Microsoft.AspNetCore.App.Runtime.csproj
@@ -288,7 +288,14 @@ This package is an internal implementation of the .NET Core SDK and is not meant
       <!-- Crossgen symbols for Linux include a GUID in the file name which cannot be predicted. -->
       <BuiltProjectOutputGroupOutput Include="$(TargetDir)*.map" Condition="'$(CrossGenSymbolsType)' == 'PerfMap'" />
 
-      <NuGetPackInput Include="@(BuiltProjectOutputGroupOutput)" />
+      <!-- Strip duplicate Files by checking for distinct %(FileName)%(Extension) -->
+      <OutputFileNames Include="%(BuiltProjectOutputGroupOutput.FileName)%(BuiltProjectOutputGroupOutput.Extension)">
+        <ItemPath>%(BuiltProjectOutputGroupOutput.Identity)</ItemPath>
+      </OutputFileNames>
+
+      <DistinctOutputFileNames Include="@(OutputFileNames->Distinct())"></DistinctOutputFileNames>
+
+      <NuGetPackInput Include="%(DistinctOutputFileNames.ItemPath)" />
     </ItemGroup>
   </Target>