private Task <IAssembly> LoadDependencyAsync(
AssemblyLoadContext assemblyLoadContext,
Dependency dependency,
CancellationToken cancellationToken)
{
return
(_assemblies.GetOrAdd(
dependency,
_ => new Lazy <Task <IAssembly> >(LoadDependencyAsyncInternal))
.Value);
// Cannot return ValueTask since possible to await multiple times.
async Task <IAssembly> LoadDependencyAsyncInternal()
{
var assemblyLoadResult =
(await
_assemblyLoaders
.ToAsyncEnumerable()
.SelectAwait(x => x.TryLoadAssemblyAsync(
assemblyLoadContext,
dependency,
cancellationToken))
.FirstOrDefaultAsync(x => x != null)
.ConfigureAwait(false))
?? throw new FlcException(
$"Could not find assembly {dependency.Name} {dependency.Version} in any location");
var subDependencies =
await
_dependencyAttributeReader
.ReadDependencies(assemblyLoadResult.Assembly)
.ToAsyncEnumerable()
.SelectAwait(x => new ValueTask <IAssembly>(
LoadDependencyAsync(assemblyLoadContext, x, cancellationToken)))
.ToImmutableArrayAsync()
.ConfigureAwait(false);
return(_assemblyFactory.FromMetadata(
assemblyLoadResult.Assembly,
assemblyLoadResult.Bytes,
subDependencies));
}
}
