/// <summary>
/// Scans an assembly for exported namespaces, adding them to the
/// mapping of valid namespaces. Note that for a given namespace
/// a.b.c.d, each of a, a.b, a.b.c and a.b.c.d are considered to
/// be valid namespaces (to better match Python import semantics).
/// </summary>
internal static void ScanAssembly(Assembly assembly)
{
if (assembly.GetCustomAttribute <PyExportAttribute>()?.Export == false)
{
return;
}
// A couple of things we want to do here: first, we want to
// gather a list of all of the namespaces contributed to by
// the assembly.
foreach (Type t in GetTypes(assembly))
{
string ns = t.Namespace ?? "";
if (!namespaces.ContainsKey(ns))
{
string[] names = ns.Split('.');
var s = "";
for (var n = 0; n < names.Length; n++)
{
s = n == 0 ? names[0] : s + "." + names[n];
if (namespaces.TryAdd(s, new ConcurrentDictionary <Assembly, string>()))
{
ImportHook.AddNamespace(s);
}
}
}
if (ns != null)
{
namespaces[ns].TryAdd(assembly, string.Empty);
}
if (ns != null && t.IsGenericTypeDefinition)
{
GenericUtil.Register(t);
}
}
}
public static Assembly AddReference(string name)
{
AssemblyManager.UpdatePath();
var origNs = AssemblyManager.GetNamespaces();
Assembly assembly = null;
assembly = AssemblyManager.FindLoadedAssembly(name);
if (assembly == null)
{
assembly = AssemblyManager.LoadAssemblyPath(name);
}
if (assembly == null)
{
assembly = AssemblyManager.LoadAssembly(name);
}
if (assembly == null)
{
assembly = AssemblyManager.LoadAssemblyFullPath(name);
}
if (assembly == null)
{
throw new FileNotFoundException($"Unable to find assembly '{name}'.");
}
// Classes that are not in a namespace needs an extra nudge to be found.
ImportHook.UpdateCLRModuleDict();
// A bit heavyhanded, but we can't use the AssemblyManager's AssemblyLoadHandler
// method because it may be called from other threads, leading to deadlocks
// if it is called while Python code is executing.
var currNs = AssemblyManager.GetNamespaces().Except(origNs);
foreach (var ns in currNs)
{
ImportHook.AddNamespace(ns);
}
return(assembly);
}