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370 lines
13 KiB
370 lines
13 KiB
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Threading.Tasks;
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using IPA.Config;
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using IPA.Logging;
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using IPA.Utilities;
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using Mono.Cecil;
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using Newtonsoft.Json;
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using Version = SemVer.Version;
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namespace IPA.Loader
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{
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/// <summary>
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/// A type to manage the loading of plugins.
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/// </summary>
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public class PluginLoader
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{
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internal static Task LoadTask() => Task.Run(() =>
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{
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LoadMetadata();
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Resolve();
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ComputeLoadOrder();
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});
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/// <summary>
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/// A class which describes
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/// </summary>
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public class PluginMetadata
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{
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/// <summary>
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/// The assembly the plugin was loaded from.
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/// </summary>
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public Assembly Assembly { get; internal set; }
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/// <summary>
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/// The TypeDefinition for the main type of the plugin.
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/// </summary>
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public TypeDefinition PluginType { get; internal set; }
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/// <summary>
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/// The human readable name of the plugin.
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/// </summary>
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public string Name { get; internal set; }
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/// <summary>
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/// The ModSaber ID of the plugin, or null if it doesn't have one.
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/// </summary>
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public string Id { get; internal set; }
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/// <summary>
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/// The version of the plugin.
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/// </summary>
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public Version Version { get; internal set; }
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/// <summary>
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/// The file the plugin was loaded from.
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/// </summary>
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public FileInfo File { get; internal set; }
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// ReSharper disable once UnusedAutoPropertyAccessor.Global
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/// <summary>
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/// The features this plugin requests.
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/// </summary>
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public string[] Features { get; internal set; }
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private PluginManifest manifest;
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internal PluginManifest Manifest
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{
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get => manifest;
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set
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{
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manifest = value;
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Name = value.Name;
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Version = value.Version;
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Id = value.Id;
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Features = value.Features;
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}
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}
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/// <inheritdoc />
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public override string ToString() => $"{Name}({Id}@{Version})({PluginType?.FullName}) from '{LoneFunctions.GetRelativePath(File?.FullName, BeatSaber.InstallPath)}'";
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}
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/// <summary>
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/// A container object for all the data relating to a plugin.
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/// </summary>
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public class PluginInfo
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{
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internal IBeatSaberPlugin Plugin { get; set; }
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/// <summary>
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/// Metadata for the plugin.
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/// </summary>
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public PluginMetadata Metadata { get; internal set; } = new PluginMetadata();
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}
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internal static List<PluginMetadata> PluginsMetadata = new List<PluginMetadata>();
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internal static void LoadMetadata()
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{
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string[] plugins = Directory.GetFiles(BeatSaber.PluginsPath, "*.dll");
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try
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{
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var selfMeta = new PluginMetadata
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{
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Assembly = Assembly.GetExecutingAssembly(),
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File = new FileInfo(Path.Combine(BeatSaber.InstallPath, "IPA.exe")),
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PluginType = null
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};
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string manifest;
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using (var manifestReader =
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new StreamReader(
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selfMeta.Assembly.GetManifestResourceStream(typeof(PluginLoader), "manifest.json") ??
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throw new InvalidOperationException()))
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manifest = manifestReader.ReadToEnd();
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selfMeta.Manifest = JsonConvert.DeserializeObject<PluginManifest>(manifest);
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PluginsMetadata.Add(selfMeta);
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}
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catch (Exception e)
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{
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Logger.loader.Critical("Error loading own manifest");
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Logger.loader.Critical(e);
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}
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foreach (var plugin in plugins)
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{
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try
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{
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var metadata = new PluginMetadata
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{
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File = new FileInfo(Path.Combine(BeatSaber.PluginsPath, plugin))
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};
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var pluginModule = AssemblyDefinition.ReadAssembly(plugin, new ReaderParameters
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{
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ReadingMode = ReadingMode.Immediate,
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ReadWrite = false
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}).MainModule;
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var iBeatSaberPlugin = pluginModule.ImportReference(typeof(IBeatSaberPlugin));
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foreach (var type in pluginModule.Types)
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{
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foreach (var inter in type.Interfaces)
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{
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var ifType = inter.InterfaceType;
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if (iBeatSaberPlugin.FullName == ifType.FullName)
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{
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metadata.PluginType = type;
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break;
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}
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}
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if (metadata.PluginType != null) break;
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}
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if (metadata.PluginType == null)
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{
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Logger.loader.Warn($"Could not find plugin type for {Path.GetFileName(plugin)}");
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continue;
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}
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foreach (var resource in pluginModule.Resources)
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{
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if (!(resource is EmbeddedResource embedded) ||
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embedded.Name != $"{metadata.PluginType.Namespace}.manifest.json") continue;
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string manifest;
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using (var manifestReader = new StreamReader(embedded.GetResourceStream()))
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manifest = manifestReader.ReadToEnd();
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metadata.Manifest = JsonConvert.DeserializeObject<PluginManifest>(manifest);
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break;
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}
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PluginsMetadata.Add(metadata);
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}
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catch (Exception e)
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{
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Logger.loader.Error($"Could not load data for plugin {Path.GetFileName(plugin)}");
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Logger.loader.Error(e);
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}
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}
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}
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internal static void Resolve()
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{ // resolves duplicates and conflicts, etc
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PluginsMetadata.Sort((a, b) => a.Version.CompareTo(b.Version));
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var ids = new HashSet<string>();
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var ignore = new HashSet<PluginMetadata>();
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var resolved = new List<PluginMetadata>(PluginsMetadata.Count);
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foreach (var meta in PluginsMetadata)
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{
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if (meta.Id != null)
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{
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if (ids.Contains(meta.Id))
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{
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Logger.loader.Warn($"Found duplicates of {meta.Id}, using newest");
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ignore.Add(meta);
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continue; // because of sorted order, hightest order will always be the first one
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}
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bool processedLater = false;
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foreach (var meta2 in PluginsMetadata)
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{
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if (ignore.Contains(meta2)) continue;
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if (meta == meta2)
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{
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processedLater = true;
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continue;
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}
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if (!meta2.Manifest.Conflicts.ContainsKey(meta.Id)) continue;
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var range = meta2.Manifest.Conflicts[meta.Id];
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if (!range.IsSatisfied(meta.Version)) continue;
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Logger.loader.Warn($"{meta.Id}@{meta.Version} conflicts with {meta2.Name}");
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if (processedLater)
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{
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Logger.loader.Warn($"Ignoring {meta2.Name}");
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ignore.Add(meta2);
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}
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else
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{
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Logger.loader.Warn($"Ignoring {meta.Name}");
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ignore.Add(meta);
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break;
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}
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}
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}
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if (ignore.Contains(meta)) continue;
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if (meta.Id != null) ids.Add(meta.Id);
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resolved.Add(meta);
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}
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PluginsMetadata = resolved;
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}
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internal static void ComputeLoadOrder()
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{
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PluginsMetadata.Sort((a, b) =>
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{
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if (a.Id == b.Id) return 0;
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if (a.Id != null)
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{
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if (b.Manifest.Dependencies.ContainsKey(a.Id) || b.Manifest.LoadAfter.Contains(a.Id)) return -1;
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if (b.Manifest.LoadBefore.Contains(a.Id)) return 1;
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}
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if (b.Id != null)
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{
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if (a.Manifest.Dependencies.ContainsKey(b.Id) || a.Manifest.LoadAfter.Contains(b.Id)) return 1;
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if (a.Manifest.LoadBefore.Contains(b.Id)) return -1;
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}
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return 0;
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});
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var metadata = new List<PluginMetadata>();
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var pluginsToLoad = new Dictionary<string, Version>();
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foreach (var meta in PluginsMetadata)
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{
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bool load = true;
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foreach (var dep in meta.Manifest.Dependencies)
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{
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if (pluginsToLoad.ContainsKey(dep.Key) && dep.Value.IsSatisfied(pluginsToLoad[dep.Key])) continue;
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load = false;
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Logger.loader.Warn($"{meta.Name} is missing dependency {dep.Key}@{dep.Value}");
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}
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if (load)
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{
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metadata.Add(meta);
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if (meta.Id != null)
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pluginsToLoad.Add(meta.Id, meta.Version);
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}
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}
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PluginsMetadata = metadata;
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}
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internal static List<PluginInfo> LoadPlugins()
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{
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var list = PluginsMetadata.Select(LoadPlugin).Where(p => p != null).ToList();
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return list;
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}
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internal static PluginInfo LoadPlugin(PluginMetadata meta)
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{
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if (meta.PluginType == null)
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return new PluginInfo()
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{
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Metadata = meta,
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Plugin = null
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};
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var info = new PluginInfo();
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try
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{
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Logger.loader.Debug(meta.File.FullName);
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meta.Assembly = Assembly.LoadFrom(meta.File.FullName);
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var type = meta.Assembly.GetType(meta.PluginType.FullName);
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var instance = (IBeatSaberPlugin)Activator.CreateInstance(type);
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info.Metadata = meta;
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info.Plugin = instance;
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{
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var init = type.GetMethod("Init", BindingFlags.Instance | BindingFlags.Public);
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if (init != null)
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{
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var initArgs = new List<object>();
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var initParams = init.GetParameters();
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Logger modLogger = null;
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IModPrefs modPrefs = null;
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IConfigProvider cfgProvider = null;
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foreach (var param in initParams)
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{
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var paramType = param.ParameterType;
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if (paramType.IsAssignableFrom(typeof(Logger)))
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{
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if (modLogger == null) modLogger = new StandardLogger(meta.Name);
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initArgs.Add(modLogger);
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}
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else if (paramType.IsAssignableFrom(typeof(IModPrefs)))
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{
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if (modPrefs == null) modPrefs = new ModPrefs(instance);
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initArgs.Add(modPrefs);
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}
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else if (paramType.IsAssignableFrom(typeof(IConfigProvider)))
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{
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if (cfgProvider == null)
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{
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cfgProvider = Config.Config.GetProviderFor(Path.Combine("UserData", $"{meta.Name}"), param);
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}
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initArgs.Add(cfgProvider);
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}
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else
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initArgs.Add(paramType.GetDefault());
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}
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init.Invoke(instance, initArgs.ToArray());
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}
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}
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}
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catch (AmbiguousMatchException)
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{
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Logger.loader.Error($"Only one Init allowed per plugin (ambiguous match in {meta.Name})");
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return null;
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}
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catch (Exception e)
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{
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Logger.loader.Error($"Could not init plugin {meta.Name}: {e}");
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return null;
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}
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return info;
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}
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}
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}
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