Retry on analyzer reference assembly failure (#889)

src/extensions/looseassembly/LooseAssembly.NuGet/LooseAssembly.NuGet.csproj

@@ -20,7 +20,7 @@
       <FullBlobPath>$(BlobBase)$(IndexName)</FullBlobPath>
     </PropertyGroup>
 
-    <DownloadFile SourceUrl="$(FullBlobPath)" DestinationFolder=".data">
+    <DownloadFile SourceUrl="$(FullBlobPath)" DestinationFolder=".data" Retries="3">
       <Output TaskParameter="DownloadedFile" ItemName="TheFile" />
     </DownloadFile>
 

tests/extensions/default/analyzers/Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers.Test/Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers.Test.csproj

@@ -48,6 +48,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic.CodeFix.Testing.XUnit">
       <Version>1.0.1-beta1.21265.1</Version>
     </PackageReference>
+    <PackageReference Include="Polly" Version="7.2.2" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\..\..\..\src\extensions\default\analyzers\Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers\Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers.csproj" />

tests/extensions/default/analyzers/Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers.Test/TestHelper.cs

@@ -15,6 +15,7 @@ using Microsoft.CodeAnalysis.Diagnostics;
 using Microsoft.CodeAnalysis.Testing;
 using Microsoft.DotNet.UpgradeAssistant.Extensions.Default.CodeFixes;
 using Microsoft.DotNet.UpgradeAssistant.Steps.Source;
+using Polly;
 using Xunit;
 
 namespace Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers.Test
@@ -82,7 +83,9 @@ namespace Microsoft.DotNet.UpgradeAssistant.Extensions.Default.Analyzers.Test
                 }
             }
 
-            var references = await GetReferenceAssemblies().ResolveAsync(language.ToLanguageName(), cancellationToken);
+            var references = await Policy.Handle<Exception>()
+                .RetryAsync(3)
+                .ExecuteAsync(cancellationToken => GetReferenceAssemblies().ResolveAsync(language.ToLanguageName(), cancellationToken), cancellationToken);
 
             project = project.WithMetadataReferences(references);