public async Task <List <string> > EnumerateAllModules(bool refresh = false) { AbortOnInvalidConfiguration(); if (_modules == null || refresh) { var stdLibPaths = new HashSet <string>(StringComparer.OrdinalIgnoreCase); stdLibPaths.Add(_factory.Configuration.LibraryPath); stdLibPaths.Add(Path.Combine(_factory.Configuration.PrefixPath, "DLLs")); stdLibPaths.Add(Path.GetDirectoryName(_factory.Configuration.InterpreterPath)); var results = await Task.Run(() => { List <PythonLibraryPath> paths; if (_factory.AssumeSimpleLibraryLayout) { paths = PythonTypeDatabase.GetDefaultDatabaseSearchPaths(_factory.Configuration.LibraryPath); } else { paths = PythonTypeDatabase.GetCachedDatabaseSearchPaths(_factory.DatabasePath); if (paths == null) { paths = PythonTypeDatabase.GetUncachedDatabaseSearchPathsAsync( _factory.Configuration.InterpreterPath ).WaitAndUnwrapExceptions(); try { PythonTypeDatabase.WriteDatabaseSearchPaths(_factory.DatabasePath, paths); } catch (Exception ex) { if (ex.IsCriticalException()) { throw; } } } } var groups = PythonTypeDatabase.GetDatabaseExpectedModules( _factory.Configuration.Version, paths ).ToList(); var stdLibModules = groups[0].Select(mp => mp.ModuleName).ToList(); var modules = groups.SelectMany().Select(mp => mp.ModuleName).ToList(); stdLibModules.Sort(); modules.Sort(); for (int i = stdLibModules.Count - 1; i > 0; --i) { if (stdLibModules[i - 1] == stdLibModules[i]) { stdLibModules.RemoveAt(i); } } for (int i = modules.Count - 1; i > 0; --i) { if (modules[i - 1] == modules[i]) { modules.RemoveAt(i); } } return(Tuple.Create(modules, stdLibModules)); }); _modules = results.Item1; _stdLibModules = results.Item2; } return(_modules); }