private async Task Proceed(IBuildTask task, IList<ProjectItem> items)
{
if (!task.DependsOn.IsMatch(items))
return;
var querySets = task.DependsOn.Select(_project.GetItems(), items).ToList();
foreach (var querySet in querySets)
{
var sources = task.Proceed(querySet.GetItems());
if (sources == null)
throw new InvalidOperationException("The proceed method has to return a value.");
foreach (var source in sources)
{
ProjectItem existing;
if (_project.TryGetItemById(source.Identifier, out existing))
{
var defferred = existing as DefferedProjectItem;
defferred?.SetDirty(source.Content);
var inMemory = existing as InMemoryProjectItem;
inMemory?.SetContent((await CopyToStream(source)).GetBuffer());
_project.Touch(existing);
}
else
{
ProjectItem item2;
if (task.Options == BuildOptions.BuildInBackground)
{
item2 = await BuildInMemoryItem(source);
}
else
item2 = new DefferedProjectItem(source.Identifier, source.Content);
_project.AddItem(item2);
foreach (var linkedItem in querySet.GetItems())
_project.AddLink(linkedItem, new ProjectItemLinkDescriptionFromBuilder(task.Name, this, linkedItem), item2);
}
}
}
}
