Add support for NuGet components in containers (#1548)

Author: JamieMagee

src/Microsoft.ComponentDetection.Detectors/linux/Factories/DotnetComponentFactory.cs

@@ -0,0 +1,32 @@
+namespace Microsoft.ComponentDetection.Detectors.Linux.Factories;
+
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using Microsoft.ComponentDetection.Contracts.TypedComponent;
+using Microsoft.ComponentDetection.Detectors.Linux.Contracts;
+
+/// <summary>
+/// Factory for creating <see cref="NuGetComponent"/> instances from .NET package artifacts.
+/// </summary>
+public class DotnetComponentFactory : ArtifactComponentFactoryBase
+{
+    /// <inheritdoc/>
+    public override IEnumerable<string> SupportedArtifactTypes => ["dotnet"];
+
+    /// <inheritdoc/>
+    public override TypedComponent? CreateComponent([NotNull] ArtifactElement artifact, [NotNull] Distro distro)
+    {
+        if (string.IsNullOrWhiteSpace(artifact.Name) || string.IsNullOrWhiteSpace(artifact.Version))
+        {
+            return null;
+        }
+
+        var author = GetAuthorFromArtifact(artifact);
+        var authors = string.IsNullOrWhiteSpace(author) ? null : new[] { author };
+
+        return new NuGetComponent(
+            name: artifact.Name,
+            version: artifact.Version,
+            authors: authors);
+    }
+}

src/Microsoft.ComponentDetection.Detectors/linux/LinuxApplicationLayerDetector.cs

@@ -30,13 +30,14 @@ ILogger<LinuxApplicationLayerDetector> logger
             Enum.GetName(typeof(DetectorClass), DetectorClass.Linux),
             Enum.GetName(typeof(DetectorClass), DetectorClass.Npm),
             Enum.GetName(typeof(DetectorClass), DetectorClass.Pip),
+            Enum.GetName(typeof(DetectorClass), DetectorClass.NuGet),
         ];
 
     /// <inheritdoc/>
     public new IEnumerable<ComponentType> SupportedComponentTypes =>
-        [ComponentType.Linux, ComponentType.Npm, ComponentType.Pip];
+        [ComponentType.Linux, ComponentType.Npm, ComponentType.Pip, ComponentType.NuGet];
 
     /// <inheritdoc/>
     protected override ISet<ComponentType> GetEnabledComponentTypes() =>
-        new HashSet<ComponentType> { ComponentType.Linux, ComponentType.Npm, ComponentType.Pip };
+        new HashSet<ComponentType> { ComponentType.Linux, ComponentType.Npm, ComponentType.Pip, ComponentType.NuGet };
 }

src/Microsoft.ComponentDetection.Orchestrator/Extensions/ServiceCollectionExtensions.cs

@@ -105,6 +105,7 @@ public static IServiceCollection AddComponentDetection(this IServiceCollection s
         services.AddSingleton<IArtifactComponentFactory, LinuxComponentFactory>();
         services.AddSingleton<IArtifactComponentFactory, NpmComponentFactory>();
         services.AddSingleton<IArtifactComponentFactory, PipComponentFactory>();
+        services.AddSingleton<IArtifactComponentFactory, DotnetComponentFactory>();
         services.AddSingleton<IArtifactFilter, Mariner2ArtifactFilter>();
         services.AddSingleton<IComponentDetector, LinuxContainerDetector>();
         services.AddSingleton<IComponentDetector, LinuxApplicationLayerDetector>();