using System; using System.Collections.Generic; using System.IO; using System.Reflection; using IPA.Logging; using Mono.Cecil; namespace IPA.Loader { internal class CecilLibLoader : BaseAssemblyResolver { public override AssemblyDefinition Resolve(AssemblyNameReference name, ReaderParameters parameters) { LibLoader.SetupAssemblyFilenames(); var testFile = $"{name.Name}.{name.Version}.dll"; if (LibLoader.FilenameLocations.TryGetValue(testFile, out string path)) { if (File.Exists(path)) { return AssemblyDefinition.ReadAssembly(path, parameters); } } return base.Resolve(name, parameters); } } internal static class LibLoader { internal static string LibraryPath => Path.Combine(Environment.CurrentDirectory, "Libs"); internal static string NativeLibraryPath => Path.Combine(LibraryPath, "Native"); internal static Dictionary FilenameLocations; internal static void SetupAssemblyFilenames(bool force = false) { if (FilenameLocations == null || force) { FilenameLocations = new Dictionary(); foreach (var fn in TraverseTree(LibraryPath, s => s != NativeLibraryPath)) if (FilenameLocations.ContainsKey(fn.Name)) Log(Logger.Level.Critical, $"Multiple instances of {fn.Name} exist in Libs! Ignoring {fn.FullName}"); else FilenameLocations.Add(fn.Name, fn.FullName); } } public static Assembly AssemblyLibLoader(object source, ResolveEventArgs e) { var asmName = new AssemblyName(e.Name); return LoadLibrary(asmName); } internal static Assembly LoadLibrary(AssemblyName asmName) { Log(Logger.Level.Debug, $"Resolving library {asmName}"); SetupAssemblyFilenames(); var testFile = $"{asmName.Name}.{asmName.Version}.dll"; Log(Logger.Level.Debug, $"Looking for file {testFile}"); if (FilenameLocations.TryGetValue(testFile, out var path)) { Log(Logger.Level.Debug, $"Found file {testFile} as {path}"); if (File.Exists(path)) return Assembly.LoadFrom(path); Log(Logger.Level.Critical, $"but {path} no longer exists!"); } else if (FilenameLocations.TryGetValue(testFile = $"{asmName.Name}.dll", out path)) { Log(Logger.Level.Debug, $"Found file {testFile} as {path}"); if (File.Exists(path)) return Assembly.LoadFrom(path); Log(Logger.Level.Critical, $"but {path} no longer exists!"); } Log(Logger.Level.Critical, $"No library {asmName} found"); return null; } internal static void Log(Logger.Level lvl, string message) { // multiple proxy methods to delay loading of assemblies until it's done if (Logger.LogCreated) AssemblyLibLoaderCallLogger(lvl, message); else if (((byte)lvl & (byte)StandardLogger.PrintFilter) != 0) Console.WriteLine($"[{lvl}] {message}"); } private static void AssemblyLibLoaderCallLogger(Logger.Level lvl, string message) { Logger.libLoader.Log(lvl, message); } // https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/file-system/how-to-iterate-through-a-directory-tree private static IEnumerable TraverseTree(string root, Func dirValidator = null) { if (dirValidator == null) dirValidator = s => true; // Data structure to hold names of subfolders to be // examined for files. Stack dirs = new Stack(32); if (!Directory.Exists(root)) { throw new ArgumentException(); } dirs.Push(root); while (dirs.Count > 0) { string currentDir = dirs.Pop(); string[] subDirs; try { subDirs = Directory.GetDirectories(currentDir); } // An UnauthorizedAccessException exception will be thrown if we do not have // discovery permission on a folder or file. It may or may not be acceptable // to ignore the exception and continue enumerating the remaining files and // folders. It is also possible (but unlikely) that a DirectoryNotFound exception // will be raised. This will happen if currentDir has been deleted by // another application or thread after our call to Directory.Exists. The // choice of which exceptions to catch depends entirely on the specific task // you are intending to perform and also on how much you know with certainty // about the systems on which this code will run. catch (UnauthorizedAccessException) { //Console.WriteLine(e.Message); continue; } catch (DirectoryNotFoundException) { //Console.WriteLine(e.Message); continue; } string[] files; try { files = Directory.GetFiles(currentDir); } catch (UnauthorizedAccessException) { //Console.WriteLine(e.Message); continue; } catch (DirectoryNotFoundException) { //Console.WriteLine(e.Message); continue; } // Push the subdirectories onto the stack for traversal. // This could also be done before handing the files. foreach (string str in subDirs) if (dirValidator(str)) dirs.Push(str); // Perform the required action on each file here. // Modify this block to perform your required task. foreach (string file in files) { FileInfo nextValue; try { // Perform whatever action is required in your scenario. nextValue = new FileInfo(file); //Console.WriteLine("{0}: {1}, {2}", fi.Name, fi.Length, fi.CreationTime); } catch (FileNotFoundException) { // If file was deleted by a separate application // or thread since the call to TraverseTree() // then just continue. //Console.WriteLine(e.Message); continue; } yield return nextValue; } } } } }