Task 3

CoDepend/Application/UpdateGraphUseCase.cs

@@ -17,12 +17,14 @@ public sealed class UpdateGraphUseCase(
     IReadOnlyList<IDependencyParser> parsers,
     RendererBase renderer,
     ISnapshotManager snapshotManager,
+    IRepository? repository = null,
     bool diff = false
     )
 {
     public async Task RunAsync(CancellationToken ct = default)
     {
-        var snapshotGraph = await snapshotManager.GetLastSavedDependencyGraphAsync(snapshotOptions, ct);
+        var snapshotGraph = repository?.GetSnapshot();
+        snapshotGraph ??= await snapshotManager.GetLastSavedDependencyGraphAsync(snapshotOptions, ct);
         var projectChanges = await ChangeDetector.GetProjectChangesAsync(parserOptions, snapshotGraph, ct);
         var graph = await new DependencyGraphBuilder(parsers, baseOptions).GetGraphAsync(projectChanges, snapshotGraph, ct);
 

CoDepend/Domain/Interfaces/IRepository.cs

@@ -0,0 +1,9 @@
+using CoDepend.Domain.Models;
+
+namespace CoDepend.Domain.Interfaces;
+
+public interface IRepository
+{
+    ProjectDependencyGraph? GetSnapshot();
+    void SetSnapshot(ProjectDependencyGraph snapshot);
+}

CoDepend/Infra/Repository.cs

@@ -0,0 +1,18 @@
+using CoDepend.Domain.Interfaces;
+using CoDepend.Domain.Models;
+
+namespace CoDepend.Infra
+{
+    public class Repository : IRepository
+    {
+        public ProjectDependencyGraph? GetSnapshot()
+        {
+            return null;
+        }
+
+        public void SetSnapshot(ProjectDependencyGraph snapshot)
+        {
+            // FIXME: does nothing for now
+        }
+    }
+}

CoDepend/Program.cs

@@ -41,7 +41,7 @@ public static async Task<string> CLI(string configPath, string format = "puml",
             var parsers = DependencyParserFactory.SelectDependencyParser(parserOptions);
             var renderer = RendererFactory.SelectRenderer(renderOptions);
 
-            var useCase = new UpdateGraphUseCase(baseOptions, parserOptions, renderOptions, snapshotOptions, parsers, renderer, snapshotManager, diff);
+            var useCase = new UpdateGraphUseCase(baseOptions, parserOptions, renderOptions, snapshotOptions, parsers, renderer, snapshotManager, diff: diff);
             await useCase.RunAsync();
 
             Console.WriteLine($"Success! Diagrams available in: {renderOptions.SaveLocation}");