private DependenciesChangesBuilder GetChanges(ITargetFramework targetFramework)
{
if (_changes == null)
{
_changes = new Dictionary <ITargetFramework, DependenciesChangesBuilder>();
}
if (_changes.TryGetValue(targetFramework, out DependenciesChangesBuilder builder))
{
return(builder);
}
return(_changes[targetFramework] = new DependenciesChangesBuilder());
}
protected override void Handle(
AggregateCrossTargetProjectContext currentAggregateContext,
ITargetFramework targetFrameworkToUpdate,
EventData e)
{
IProjectSubscriptionUpdate projectUpdate = e.Item1;
IProjectCatalogSnapshot catalogSnapshot = e.Item2;
// Broken design time builds sometimes cause updates with no project changes and sometimes
// cause updates with a project change that has no difference.
// We handle the former case here, and the latter case is handled in the CommandLineItemHandler.
if (projectUpdate.ProjectChanges.Count == 0)
{
return;
}
if (!projectUpdate.ProjectChanges.Any(x => x.Value.Difference.AnyChanges))
{
return;
}
// Create an object to track dependency changes.
var changesBuilder = new DependenciesChangesBuilder();
// Give each handler a chance to register dependency changes.
foreach (Lazy <IDependenciesRuleHandler, IOrderPrecedenceMetadataView> handler in _handlers)
{
handler.Value.Handle(projectUpdate.ProjectChanges, targetFrameworkToUpdate, changesBuilder);
}
IDependenciesChanges?changes = changesBuilder.TryBuildChanges();
if (changes != null)
{
// Notify subscribers of a change in dependency data
RaiseDependenciesChanged(targetFrameworkToUpdate, changes, currentAggregateContext, catalogSnapshot);
}
// Record all the rules that have occurred
_treeTelemetryService.ObserveTargetFrameworkRules(targetFrameworkToUpdate, projectUpdate.ProjectChanges.Keys);
}
public override string ToString() => DependenciesChangesBuilder.ToString(AddedNodes, RemovedNodes);
