public AssemblyDependencyResolver(string componentAssemblyPath)
{
if (componentAssemblyPath == null)
{
throw new ArgumentNullException(nameof(componentAssemblyPath));
}
string?assemblyPathsList = null;
string?nativeSearchPathsList = null;
string?resourceSearchPathsList = null;
int returnCode = 0;
StringBuilder errorMessage = new StringBuilder();
try
{
// Setup error writer for this thread. This makes the hostpolicy redirect all error output
// to the writer specified. Have to store the previous writer to set it back once this is done.
corehost_error_writer_fn errorWriter = new corehost_error_writer_fn(message =>
{
errorMessage.AppendLine(message);
});
IntPtr errorWriterPtr = Marshal.GetFunctionPointerForDelegate(errorWriter);
IntPtr previousErrorWriterPtr = corehost_set_error_writer(errorWriterPtr);
try
{
// Call hostpolicy to do the actual work of finding .deps.json, parsing it and extracting
// information from it.
returnCode = corehost_resolve_component_dependencies(
componentAssemblyPath,
(assembly_paths, native_search_paths, resource_search_paths) =>
{
assemblyPathsList = assembly_paths;
nativeSearchPathsList = native_search_paths;
resourceSearchPathsList = resource_search_paths;
});
}
finally
{
// Reset the error write to the one used before
corehost_set_error_writer(previousErrorWriterPtr);
GC.KeepAlive(errorWriter);
}
}
catch (EntryPointNotFoundException entryPointNotFoundException)
{
throw new InvalidOperationException(SR.AssemblyDependencyResolver_FailedToLoadHostpolicy, entryPointNotFoundException);
}
catch (DllNotFoundException dllNotFoundException)
{
throw new InvalidOperationException(SR.AssemblyDependencyResolver_FailedToLoadHostpolicy, dllNotFoundException);
}
if (returnCode != 0)
{
// Something went wrong - report a failure
throw new InvalidOperationException(SR.Format(
SR.AssemblyDependencyResolver_FailedToResolveDependencies,
componentAssemblyPath,
returnCode,
errorMessage));
}
string[] assemblyPaths = SplitPathsList(assemblyPathsList);
// Assembly simple names are case insensitive per the runtime behavior
// (see SimpleNameToFileNameMapTraits for the TPA lookup hash).
_assemblyPaths = new Dictionary <string, string>(StringComparer.OrdinalIgnoreCase);
foreach (string assemblyPath in assemblyPaths)
{
_assemblyPaths.Add(Path.GetFileNameWithoutExtension(assemblyPath) !, assemblyPath); // TODO-NULLABLE: https://github.com/dotnet/roslyn/issues/26761
}
_nativeSearchPaths = SplitPathsList(nativeSearchPathsList);
_resourceSearchPaths = SplitPathsList(resourceSearchPathsList);
_assemblyDirectorySearchPaths = new string[1] {
Path.GetDirectoryName(componentAssemblyPath) !
}; // TODO-NULLABLE: https://github.com/dotnet/roslyn/issues/26761
}
internal static extern IntPtr corehost_set_error_writer(
corehost_error_writer_fn error_writer);
