From 41d90e60afb8b0c453a3589aae7434924a9307d0 Mon Sep 17 00:00:00 2001
From: Aditya Patwardhan <adityap@microsoft.com>
Date: Fri, 3 Sep 2021 11:00:50 -0700
Subject: [PATCH] Avoid duplicate adds of dotnet-internal feed

---
 tools/UpdateDotnetRuntime.ps1 | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/UpdateDotnetRuntime.ps1 b/tools/UpdateDotnetRuntime.ps1
index 044fe993f..5126d1099 100644
--- a/tools/UpdateDotnetRuntime.ps1
+++ b/tools/UpdateDotnetRuntime.ps1
@@ -278,8 +278,15 @@ if ($dotnetUpdate.ShouldUpdate) {
         if ($feedname -eq 'dotnet-internal') {
             # This NuGet feed is for internal to Microsoft use only.
             $dotnetInternalFeed = $dotnetMetadataJson.internalfeed.url
-            $updatedNugetFile = $nugetFileContent -replace "</packageSources>", "  <add key=`"dotnet-internal`" value=`"$dotnetInternalFeed`" />`r`n  </packageSources>"
+
+            $updatedNugetFile = if ($nugetFileContent.Contains('dotnet-internal')) {
+                $nugetFileContent -replace ".<add key=`"dotnet-internal?.*', ' <add key=`"dotnet-internal`" value=`"$dotnetInternalFeed`" />`r`n  </packageSources>"
+            } else {
+                $nugetFileContent -replace "</packageSources>", "  <add key=`"dotnet-internal`" value=`"$dotnetInternalFeed`" />`r`n  </packageSources>"
+            }
+
             $updatedNugetFile | Out-File "$PSScriptRoot/../nuget.config" -Force
+
             Register-PackageSource -Name 'dotnet-internal' -Location $dotnetInternalFeed -ProviderName NuGet
             Write-Verbose -Message "Register new package source 'dotnet-internal'" -verbose
         }