protected override void ExecuteCore()

in src/Tasks/Microsoft.NET.Build.Tasks/PreprocessPackageDependenciesDesignTime.cs [76:122]
33 lines of code
5 McCabe index (conditional complexity)

        protected override void ExecuteCore()
        {
            ImplicitPackageReferences = GetImplicitPackageReferences(DefaultImplicitPackages);
            
            PopulateTargets();

            PopulatePackages();

            PopulateAssemblies();
            PopulateExistingReferenceItems();

            InputDiagnosticMessages = InputDiagnosticMessages ?? Array.Empty<ITaskItem>();
            PopulateDiagnosticsMap();

            AddDependenciesToTheWorld(Packages, PackageDependencies);

            AddDependenciesToTheWorld(Assemblies, FileDependencies, (item) =>
            {
                // We keep analyzers and assemblies with CompileTimeAssembly metadata; skip everything else.

                ItemMetadata itemMetadata = null;                
                if (Assemblies.TryGetValue(item.ItemSpec, out itemMetadata) && 
                    itemMetadata.Type == DependencyType.AnalyzerAssembly)
                {
                    return false;
                }

                var fileGroup = item.GetMetadata(MetadataKeys.FileGroup);
                return string.IsNullOrEmpty(fileGroup) || !fileGroup.Equals(CompileTimeAssemblyMetadata);
            });

            AddDependenciesToTheWorld(Assemblies, ExistingReferenceItemDependencies);

            AddDependenciesToTheWorld(DiagnosticsMap, InputDiagnosticMessages);

            // prepare output collection: add corresponding metadata to ITaskItem based in item type
            DependenciesDesignTime = DependenciesWorld.Select(itemKvp =>
            {
                var newTaskItem = new TaskItem(itemKvp.Key);
                foreach(var metadataKvp in itemKvp.Value.ToDictionary())
                {
                    newTaskItem.SetMetadata(metadataKvp.Key, metadataKvp.Value);
                }

                return newTaskItem;
            }).ToArray();
        }