Enable CredentialProvider

Author: trackman-dem

Dockerfile

@@ -17,6 +17,12 @@ RUN dotnet publish src -a $TARGETARCH -c Release -o /app/src/out
 FROM mcr.microsoft.com/dotnet/aspnet:7.0
 WORKDIR /app
 COPY --from=build /app/src/out .
-RUN mkdir /root/.nuget
+
+# Install Azure Artifacts Credential Provider for MSI authentication
+RUN apt-get update && apt-get install -y wget unzip curl && \
+wget -qO- https://aka.ms/install-artifacts-credprovider.sh | bash && \
+apt-get clean && rm -rf /var/lib/apt/lists/*
+
+RUN mkdir -p /root/.nuget/NuGet
 COPY ./NuGet.Config /root/.nuget/NuGet/NuGet.Config
 ENTRYPOINT ["dotnet", "UnityNuGet.Server.dll"]

src/UnityNuGet/RegistryCache.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
@@ -14,6 +14,7 @@
 using Newtonsoft.Json;
 using NuGet.Common;
 using NuGet.Configuration;
+using NuGet.Credentials;
 using NuGet.Frameworks;
 using NuGet.PackageManagement;
 using NuGet.Packaging;
@@ -56,6 +57,9 @@ public RegistryCache(RegistryCache registryCache) : this(registryCache._rootPers
         public RegistryCache(string rootPersistentFolder, Uri rootHttpUri, string unityScope, string minimumUnityVersion,
             string packageNameNuGetPostFix, RegistryTargetFramework[] targetFrameworks, ILogger logger)
         {
+            // Initialize credential service ONCE at app startup
+            DefaultCredentialServiceUtility.SetupDefaultCredentialService(logger, nonInteractive: true);
+
             _rootPersistentFolder = rootPersistentFolder ?? throw new ArgumentNullException(nameof(rootPersistentFolder));
             _rootHttpUri = rootHttpUri ?? throw new ArgumentNullException(nameof(rootHttpUri));
             _unityScope = unityScope ?? throw new ArgumentNullException(nameof(unityScope));