feature: first

NuGet/PackageSourceMapping.cs

@@ -0,0 +1,17 @@
+using System.Collections.Immutable;
+
+namespace NuGet;
+
+public class PackageSourceMapping(ImmutableArray<PackageSource> sources)
+{
+    private readonly ImmutableArray<(string pattern, Task<NuGetClient> client)> _clients = [
+        ..sources.Select(b =>
+            (b.Pattern,
+                NuGetClient.CreateFromIndexUrlAsync(b.Url)))
+    ];
+
+    public Task<NuGetClient> GetClientAsync(string packageId) =>
+        _clients.FirstOrDefault(b => packageId.StartsWith(b.pattern)).client;
+}
+
+public record PackageSource(string Pattern, string Url);