public async Task <PEFile?> ResolveAsync(IAssemblyReference reference)
{
PEFile?module;
// 0) if we're inside a package, look for filename.dll in parent directories
if (providedAssemblyResolver != null)
{
module = await providedAssemblyResolver.ResolveAsync(reference).ConfigureAwait(false);
if (module != null)
{
return(module);
}
}
string tfm = await tfmTask.ConfigureAwait(false);
bool isWinRT = reference.IsWindowsRuntime;
string key = tfm + ";" + (isWinRT ? reference.Name : reference.FullName);
// 1) try to find exact match by tfm + full asm name in loaded assemblies
var lookup = LazyInit.VolatileRead(ref isWinRT ? ref asmLookupByShortName : ref asmLookupByFullName);
if (lookup == null)
{
lookup = await CreateLoadedAssemblyLookupAsync(shortNames : isWinRT).ConfigureAwait(false);
lookup = LazyInit.GetOrSet(ref isWinRT ? ref asmLookupByShortName : ref asmLookupByFullName, lookup);
}
if (lookup.TryGetValue(key, out module))
{
referenceLoadInfo.AddMessageOnce(reference.FullName, MessageKind.Info, "Success - Found in Assembly List");
return(module);
}
string?file = parent.GetUniversalResolver().FindAssemblyFile(reference);
if (file != null)
{
// Load assembly from disk
LoadedAssembly?asm;
if (loadOnDemand)
{
asm = assemblyList.OpenAssembly(file, isAutoLoaded: true);
}
else
{
asm = assemblyList.FindAssembly(file);
}
if (asm != null)
{
referenceLoadInfo.AddMessage(reference.ToString(), MessageKind.Info, "Success - Loading from: " + file);
return(await asm.GetPEFileOrNullAsync().ConfigureAwait(false));
}
return(null);
}
else
{
// Assembly not found; try to find a similar-enough already-loaded assembly
var candidates = new List <(LoadedAssembly assembly, Version version)>();
foreach (LoadedAssembly loaded in alreadyLoadedAssemblies)
{
module = await loaded.GetPEFileOrNullAsync().ConfigureAwait(false);
var reader = module?.Metadata;
if (reader == null || !reader.IsAssembly)
{
continue;
}
var asmDef = reader.GetAssemblyDefinition();
var asmDefName = reader.GetString(asmDef.Name);
if (reference.Name.Equals(asmDefName, StringComparison.OrdinalIgnoreCase))
{
candidates.Add((loaded, asmDef.Version));
}
}
if (candidates.Count == 0)
{
referenceLoadInfo.AddMessageOnce(reference.ToString(), MessageKind.Error, "Could not find reference: " + reference);
return(null);
}
candidates.SortBy(c => c.version);
var bestCandidate = candidates.FirstOrDefault(c => c.version >= reference.Version).assembly ?? candidates.Last().assembly;
referenceLoadInfo.AddMessageOnce(reference.ToString(), MessageKind.Info, "Success - Found in Assembly List with different TFM or version: " + bestCandidate.fileName);
return(await bestCandidate.GetPEFileOrNullAsync().ConfigureAwait(false));
}
}