From 93137ea040472f4042dd186427699ad249e7251b Mon Sep 17 00:00:00 2001
From: David McFarland <corngood@gmail.com>
Date: Sun, 22 Sep 2024 16:41:07 -0300
Subject: [PATCH] UpdateNuGetConfigPackageSourcesMappings: don't add empty
 mappings

---
 .../UpdateNuGetConfigPackageSourcesMappings.cs              | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/eng/tools/tasks/Microsoft.DotNet.UnifiedBuild.Tasks/UpdateNuGetConfigPackageSourcesMappings.cs b/eng/tools/tasks/Microsoft.DotNet.UnifiedBuild.Tasks/UpdateNuGetConfigPackageSourcesMappings.cs
index 3b188c1801..9b7050ef46 100644
--- a/eng/tools/tasks/Microsoft.DotNet.UnifiedBuild.Tasks/UpdateNuGetConfigPackageSourcesMappings.cs
+++ b/eng/tools/tasks/Microsoft.DotNet.UnifiedBuild.Tasks/UpdateNuGetConfigPackageSourcesMappings.cs
@@ -115,7 +115,11 @@ namespace Microsoft.DotNet.UnifiedBuild.Tasks
                 // Skip sources with zero package patterns
                 if (allSourcesPackages[packageSource]?.Count > 0)
                 {
-                    pkgSrcMappingClearElement.AddAfterSelf(GetPackageMappingsElementForSource(packageSource));
+                    var pkgSrc = GetPackageMappingsElementForSource(packageSource);
+                    if (pkgSrc.Elements().Any())
+                    {
+                        pkgSrcMappingClearElement.AddAfterSelf(pkgSrc);
+                    }
                 }
             }
 
-- 
2.46.0