private void ProcessExtensionReference(ExtensionLoadingContext context,
ExtensionProbeEntry activatedExtension,
string referenceName,
IList <DependencyReferenceDescriptor> activatedReferences)
{
// If the reference is an extension has been processed already, use the same loader as
// that extension, since a given extension should be loaded with a unique loader for the
// whole application
var bestExtensionReference = context.ProcessedExtensions.ContainsKey(referenceName) ?
context.ProcessedExtensions[referenceName] :
null;
// Activated the extension reference
if (bestExtensionReference != null)
{
activatedReferences.Add(new DependencyReferenceDescriptor
{
LoaderName = bestExtensionReference.Loader.Name,
Name = referenceName,
VirtualPath = bestExtensionReference.VirtualPath
});
return;
}
// Skip references from "~/bin"
if (_buildManager.HasReferencedAssembly(referenceName))
{
return;
}
// Binary references
var references = context.ReferencesByName.ContainsKey(referenceName) ?
context.ReferencesByName[referenceName] :
Enumerable.Empty <ExtensionReferenceProbeEntry>();
var bestBinaryReference = references
.Where(entry => !string.IsNullOrEmpty(entry.VirtualPath))
.Select(entry => new { Entry = entry, LastWriteTimeUtc = _virtualPathProvider.GetFileLastWriteTimeUtc(entry.VirtualPath) })
.OrderBy(e => e.LastWriteTimeUtc)
.ThenBy(e => e.Entry.Name)
.FirstOrDefault();
// Activate the binary ref
if (bestBinaryReference != null)
{
if (!context.ProcessedReferences.ContainsKey(bestBinaryReference.Entry.Name))
{
context.ProcessedReferences.Add(bestBinaryReference.Entry.Name, bestBinaryReference.Entry);
bestBinaryReference.Entry.Loader.ReferenceActivated(context, bestBinaryReference.Entry);
}
activatedReferences.Add(new DependencyReferenceDescriptor
{
LoaderName = bestBinaryReference.Entry.Loader.Name,
Name = bestBinaryReference.Entry.Name,
VirtualPath = bestBinaryReference.Entry.VirtualPath
});
return;
}
}
private void ProcessContextCommands(ExtensionLoadingContext ctx)
{
Logger.Information("Executing list of operations needed for loading extensions...");
foreach (var action in ctx.DeleteActions)
{
action();
}
foreach (var action in ctx.CopyActions)
{
action();
}
}
private string GetExtensionHash(ExtensionLoadingContext context, DependencyDescriptor dependencyDescriptor)
{
var hash = new Hash();
hash.AddStringInvariant(dependencyDescriptor.Name);
foreach (var virtualpathDependency in context.ProcessedExtensions[dependencyDescriptor.Name].VirtualPathDependencies)
{
hash.AddDateTime(GetVirtualPathModificationTimeUtc(context.VirtualPathModficationDates, virtualpathDependency));
}
foreach (var reference in dependencyDescriptor.References)
{
hash.AddStringInvariant(reference.Name);
hash.AddString(reference.LoaderName);
hash.AddDateTime(GetVirtualPathModificationTimeUtc(context.VirtualPathModficationDates, reference.VirtualPath));
}
return(hash.Value);
}
private IEnumerable <DependencyReferenceDescriptor> ProcessExtensionReferences(ExtensionLoadingContext context, ExtensionProbeEntry activatedExtension)
{
if (activatedExtension == null)
{
return(Enumerable.Empty <DependencyReferenceDescriptor>());
}
var referenceNames = (context.ReferencesByModule.ContainsKey(activatedExtension.Descriptor.Id) ?
context.ReferencesByModule[activatedExtension.Descriptor.Id] :
Enumerable.Empty <ExtensionReferenceProbeEntry>())
.Select(r => r.Name)
.Distinct(StringComparer.OrdinalIgnoreCase);
var referencesDecriptors = new List <DependencyReferenceDescriptor>();
foreach (var referenceName in referenceNames)
{
ProcessExtensionReference(context, activatedExtension, referenceName, referencesDecriptors);
}
return(referencesDecriptors);
}
private void ProcessExtension(ExtensionLoadingContext context, ExtensionDescriptor extension)
{
var extensionProbes = context.AvailableExtensionsProbes.ContainsKey(extension.Id) ?
context.AvailableExtensionsProbes[extension.Id] :
Enumerable.Empty <ExtensionProbeEntry>();
// materializes the list
extensionProbes = extensionProbes.ToArray();
if (Logger.IsEnabled(LogLevel.Debug))
{
Logger.Debug("Loaders for extension \"{0}\": ", extension.Id);
foreach (var probe in extensionProbes)
{
Logger.Debug(" Loader: {0}", probe.Loader.Name);
Logger.Debug(" VirtualPath: {0}", probe.VirtualPath);
Logger.Debug(" VirtualPathDependencies: {0}", string.Join(", ", probe.VirtualPathDependencies));
}
}
var moduleReferences =
context.AvailableExtensions
.Where(e =>
context.ReferencesByModule.ContainsKey(extension.Id) &&
context.ReferencesByModule[extension.Id].Any(r => StringComparer.OrdinalIgnoreCase.Equals(e.Id, r.Name)))
.ToList();
var processedModuleReferences =
moduleReferences
.Where(e => context.ProcessedExtensions.ContainsKey(e.Id))
.Select(e => context.ProcessedExtensions[e.Id])
.ToList();
var activatedExtension = extensionProbes.FirstOrDefault(
e => e.Loader.IsCompatibleWithModuleReferences(extension, processedModuleReferences)
);
var previousDependency = context.PreviousDependencies.FirstOrDefault(
d => StringComparer.OrdinalIgnoreCase.Equals(d.Name, extension.Id)
);
if (activatedExtension == null)
{
Logger.Warning("No loader found for extension \"{0}\"!", extension.Id);
}
var references = ProcessExtensionReferences(context, activatedExtension);
foreach (var loader in _loaders)
{
if (activatedExtension != null && activatedExtension.Loader.Name == loader.Name)
{
Logger.Information("Activating extension \"{0}\" with loader \"{1}\"", activatedExtension.Descriptor.Id, loader.Name);
loader.ExtensionActivated(context, extension);
}
else if (previousDependency != null && previousDependency.LoaderName == loader.Name)
{
Logger.Information("Deactivating extension \"{0}\" from loader \"{1}\"", previousDependency.Name, loader.Name);
loader.ExtensionDeactivated(context, extension);
}
}
if (activatedExtension != null)
{
context.NewDependencies.Add(new DependencyDescriptor
{
Name = extension.Id,
LoaderName = activatedExtension.Loader.Name,
VirtualPath = activatedExtension.VirtualPath,
References = references
});
}
// Keep track of which loader we use for every extension
// This will be needed for processing references from other dependent extensions
context.ProcessedExtensions.Add(extension.Id, activatedExtension);
}