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