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using IPA.Loader.Features;
using IPA.Logging;
using IPA.Utilities;
using Mono.Cecil;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Version = SemVer.Version;
namespace IPA.Loader
{
/// <summary>
/// A type to manage the loading of plugins.
/// </summary>
public class PluginLoader
{
internal static Task LoadTask() => Task.Run(() =>
{
LoadMetadata();
Resolve();
FilterDisabled();
ComputeLoadOrder();
});
/// <summary>
/// A class which describes a loaded plugin.
/// </summary>
public class PluginMetadata
{
/// <summary>
/// The assembly the plugin was loaded from.
/// </summary>
public Assembly Assembly { get; internal set; }
/// <summary>
/// The TypeDefinition for the main type of the plugin.
/// </summary>
public TypeDefinition PluginType { get; internal set; }
/// <summary>
/// The human readable name of the plugin.
/// </summary>
public string Name { get; internal set; }
/// <summary>
/// The BeatMods ID of the plugin, or null if it doesn't have one.
/// </summary>
public string Id { get; internal set; }
/// <summary>
/// The version of the plugin.
/// </summary>
public Version Version { get; internal set; }
/// <summary>
/// The file the plugin was loaded from.
/// </summary>
public FileInfo File { get; internal set; }
// ReSharper disable once UnusedAutoPropertyAccessor.Global
/// <summary>
/// The features this plugin requests.
/// </summary>
public IReadOnlyList<Feature> Features => InternalFeatures;
internal readonly List<Feature> InternalFeatures = new List<Feature>();
internal bool IsSelf;
internal bool IsBare;
private PluginManifest manifest;
internal HashSet<PluginMetadata> Dependencies { get; } = new HashSet<PluginMetadata>();
internal PluginManifest Manifest
{
get => manifest;
set
{
manifest = value;
Name = value.Name;
Version = value.Version;
Id = value.Id;
}
}
/// <inheritdoc />
public override string ToString() => $"{Name}({Id}@{Version})({PluginType?.FullName}) from '{Utils.GetRelativePath(File?.FullName, BeatSaber.InstallPath)}'";
}
/// <summary>
/// A container object for all the data relating to a plugin.
/// </summary>
public class PluginInfo
{
internal IBeatSaberPlugin Plugin { get; set; }
/// <summary>
/// Metadata for the plugin.
/// </summary>
public PluginMetadata Metadata { get; internal set; } = new PluginMetadata();
}
internal static List<PluginMetadata> PluginsMetadata = new List<PluginMetadata>();
private static readonly Regex embeddedTextDescriptionPattern = new Regex(@"#!\[(.+)\]", RegexOptions.Compiled | RegexOptions.Singleline);
internal static void LoadMetadata()
{
string[] plugins = Directory.GetFiles(BeatSaber.PluginsPath, "*.dll");
try
{
var selfMeta = new PluginMetadata
{
Assembly = Assembly.GetExecutingAssembly(),
File = new FileInfo(Path.Combine(BeatSaber.InstallPath, "IPA.exe")),
PluginType = null,
IsSelf = true
};
string manifest;
using (var manifestReader =
new StreamReader(
selfMeta.Assembly.GetManifestResourceStream(typeof(PluginLoader), "manifest.json") ??
throw new InvalidOperationException()))
manifest = manifestReader.ReadToEnd();
selfMeta.Manifest = JsonConvert.DeserializeObject<PluginManifest>(manifest);
PluginsMetadata.Add(selfMeta);
}
catch (Exception e)
{
Logger.loader.Critical("Error loading own manifest");
Logger.loader.Critical(e);
}
foreach (var plugin in plugins)
{
try
{
var metadata = new PluginMetadata
{
File = new FileInfo(Path.Combine(BeatSaber.PluginsPath, plugin)),
IsSelf = false
};
var pluginModule = AssemblyDefinition.ReadAssembly(plugin, new ReaderParameters
{
ReadingMode = ReadingMode.Immediate,
ReadWrite = false,
AssemblyResolver = new CecilLibLoader()
}).MainModule;
var iBeatSaberPlugin = pluginModule.ImportReference(typeof(IBeatSaberPlugin));
foreach (var type in pluginModule.Types)
{
foreach (var inter in type.Interfaces)
{
var ifType = inter.InterfaceType;
if (iBeatSaberPlugin.FullName == ifType.FullName)
{
metadata.PluginType = type;
break;
}
}
if (metadata.PluginType != null) break;
}
if (metadata.PluginType == null)
{
Logger.loader.Notice(
#if DIRE_LOADER_WARNINGS
$"Could not find plugin type for {Path.GetFileName(plugin)}"
#else
$"New plugin type not present in {Path.GetFileName(plugin)}; maybe an old plugin?"
#endif
);
continue;
}
foreach (var resource in pluginModule.Resources)
{
if (!(resource is EmbeddedResource embedded) ||
embedded.Name != $"{metadata.PluginType.Namespace}.manifest.json") continue;
string manifest;
using (var manifestReader = new StreamReader(embedded.GetResourceStream()))
manifest = manifestReader.ReadToEnd();
metadata.Manifest = JsonConvert.DeserializeObject<PluginManifest>(manifest);
break;
}
if (metadata.Manifest == null)
{
Logger.loader.Error("Could not find manifest.json in namespace " +
$"{metadata.PluginType.Namespace} for {Path.GetFileName(plugin)}");
continue;
}
Logger.loader.Debug($"Adding info for {Path.GetFileName(plugin)}");
PluginsMetadata.Add(metadata);
}
catch (Exception e)
{
Logger.loader.Error($"Could not load data for plugin {Path.GetFileName(plugin)}");
Logger.loader.Error(e);
}
foreach (var meta in PluginsMetadata)
{ // process description include
var lines = meta.Manifest.Description.Split('\n');
var m = embeddedTextDescriptionPattern.Match(lines[0]);
if (m.Success)
{
if (meta.IsBare)
{
Logger.loader.Warn($"Bare manifest cannot specify description file");
meta.Manifest.Description = string.Join("\n", lines.Skip(1)); // ignore first line
continue;
}
var name = m.Groups[1].Value;
string description;
if (!meta.IsSelf)
{
var resc = meta.PluginType.Module.Resources.Select(r => r as EmbeddedResource)
.Where(r => r != null)
.FirstOrDefault(r => r.Name == name);
if (resc == null)
{
Logger.loader.Warn($"Could not find description file for plugin {meta.Name} ({name}); ignoring include");
meta.Manifest.Description = string.Join("\n", lines.Skip(1)); // ignore first line
continue;
}
using (var reader = new StreamReader(resc.GetResourceStream()))
description = reader.ReadToEnd();
}
else
{
using (var descriptionReader =
new StreamReader(
meta.Assembly.GetManifestResourceStream(name) ??
throw new InvalidOperationException()))
description = descriptionReader.ReadToEnd();
}
meta.Manifest.Description = description;
}
}
}
IEnumerable<string> bareManifests = Directory.GetFiles(BeatSaber.PluginsPath, "*.json");
bareManifests = bareManifests.Concat(Directory.GetFiles(BeatSaber.PluginsPath, "*.manifest"));
foreach (var manifest in bareManifests)
{
try
{
var metadata = new PluginMetadata
{
File = new FileInfo(Path.Combine(BeatSaber.PluginsPath, manifest)),
IsSelf = false,
IsBare = true,
};
metadata.Manifest = JsonConvert.DeserializeObject<PluginManifest>(File.ReadAllText(manifest));
Logger.loader.Debug($"Adding info for bare manifest {Path.GetFileName(manifest)}");
PluginsMetadata.Add(metadata);
}
catch (Exception e)
{
Logger.loader.Error($"Could not load data for bare manifest {Path.GetFileName(manifest)}");
Logger.loader.Error(e);
}
}
}
// keep track of these for the updater; it should still be able to update mods not loaded
// TODO: add ignore reason
internal static HashSet<PluginMetadata> ignoredPlugins = new HashSet<PluginMetadata>();
internal static void Resolve()
{ // resolves duplicates and conflicts, etc
PluginsMetadata.Sort((a, b) => b.Version.CompareTo(a.Version));
var ids = new HashSet<string>();
var ignore = new HashSet<PluginMetadata>();
var resolved = new List<PluginMetadata>(PluginsMetadata.Count);
foreach (var meta in PluginsMetadata)
{
if (meta.Id != null)
{
if (ids.Contains(meta.Id))
{
Logger.loader.Warn($"Found duplicates of {meta.Id}, using newest");
ignore.Add(meta);
ignoredPlugins.Add(meta);
continue; // because of sorted order, hightest order will always be the first one
}
bool processedLater = false;
foreach (var meta2 in PluginsMetadata)
{
if (ignore.Contains(meta2)) continue;
if (meta == meta2)
{
processedLater = true;
continue;
}
if (!meta2.Manifest.Conflicts.ContainsKey(meta.Id)) continue;
var range = meta2.Manifest.Conflicts[meta.Id];
if (!range.IsSatisfied(meta.Version)) continue;
Logger.loader.Warn($"{meta.Id}@{meta.Version} conflicts with {meta2.Name}");
if (processedLater)
{
Logger.loader.Warn($"Ignoring {meta2.Name}");
ignore.Add(meta2);
}
else
{
Logger.loader.Warn($"Ignoring {meta.Name}");
ignore.Add(meta);
break;
}
}
}
if (ignore.Contains(meta))
{
ignoredPlugins.Add(meta);
continue;
}
if (meta.Id != null)
ids.Add(meta.Id);
resolved.Add(meta);
}
PluginsMetadata = resolved;
}
private static void FilterDisabled()
{ // TODO: move disabled to a seperate list from ignored
var enabled = new List<PluginMetadata>(PluginsMetadata.Count);
var disabled = DisabledConfig.Ref.Value.DisabledModIds;
foreach (var meta in PluginsMetadata)
{
if (disabled.Contains(meta.Id ?? meta.Name))
ignoredPlugins.Add(meta);
else
enabled.Add(meta);
}
PluginsMetadata = enabled;
}
internal static void ComputeLoadOrder()
{
#if DEBUG
Logger.loader.Debug(string.Join(", ", PluginsMetadata.Select(p => p.ToString())));
#endif
bool InsertInto(HashSet<PluginMetadata> root, PluginMetadata meta, bool isRoot = false)
{ // this is slow, and hella recursive
bool inserted = false;
foreach (var sr in root)
{
inserted = inserted || InsertInto(sr.Dependencies, meta);
if (meta.Id != null)
if (sr.Manifest.Dependencies.ContainsKey(meta.Id) || sr.Manifest.LoadAfter.Contains(meta.Id))
inserted = inserted || sr.Dependencies.Add(meta);
if (sr.Id != null)
if (meta.Manifest.LoadBefore.Contains(sr.Id))
inserted = inserted || sr.Dependencies.Add(meta);
}
if (isRoot)
{
foreach (var sr in root)
{
InsertInto(meta.Dependencies, sr);
if (sr.Id != null)
if (meta.Manifest.Dependencies.ContainsKey(sr.Id) || meta.Manifest.LoadAfter.Contains(sr.Id))
meta.Dependencies.Add(sr);
if (meta.Id != null)
if (sr.Manifest.LoadBefore.Contains(meta.Id))
meta.Dependencies.Add(sr);
}
root.Add(meta);
}
return inserted;
}
var pluginTree = new HashSet<PluginMetadata>();
foreach (var meta in PluginsMetadata)
InsertInto(pluginTree, meta, true);
void DeTree(List<PluginMetadata> into, HashSet<PluginMetadata> tree)
{
foreach (var st in tree)
if (!into.Contains(st))
{
DeTree(into, st.Dependencies);
into.Add(st);
}
}
var deTreed = new List<PluginMetadata>();
DeTree(deTreed, pluginTree);
#if DEBUG
Logger.loader.Debug(string.Join(", ", deTreed.Select(p => p.ToString())));
#endif
var metadata = new List<PluginMetadata>();
var pluginsToLoad = new Dictionary<string, Version>();
foreach (var meta in deTreed)
{
bool load = true;
foreach (var dep in meta.Manifest.Dependencies)
{
#if DEBUG
Logger.loader.Debug($"Looking for dependency {dep.Key} with version range {dep.Value.Intersect(new SemVer.Range("*.*.*"))}");
#endif
if (pluginsToLoad.ContainsKey(dep.Key) && dep.Value.IsSatisfied(pluginsToLoad[dep.Key]))
continue;
load = false;
Logger.loader.Warn($"{meta.Name} is missing dependency {dep.Key}@{dep.Value}");
}
if (load)
{
metadata.Add(meta);
if (meta.Id != null)
pluginsToLoad.Add(meta.Id, meta.Version);
}
else
ignoredPlugins.Add(meta);
}
PluginsMetadata = metadata;
}
internal static void InitFeatures()
{
var parsedFeatures = PluginsMetadata.Select(m =>
Tuple.Create(m,
m.Manifest.Features.Select(f =>
Tuple.Create(f, Ref.Create<Feature.FeatureParse?>(null))
).ToList()
)
).ToList();
while (DefineFeature.NewFeature)
{
DefineFeature.NewFeature = false;
foreach (var plugin in parsedFeatures)
for (var i = 0; i < plugin.Item2.Count; i++)
{
var feature = plugin.Item2[i];
var success = Feature.TryParseFeature(feature.Item1, plugin.Item1, out var featureObj,
out var exception, out var valid, out var parsed, feature.Item2.Value);
if (!success && !valid && featureObj == null && exception == null) // no feature of type found
feature.Item2.Value = parsed;
else if (success)
{
if (valid && featureObj.StoreOnPlugin)
plugin.Item1.InternalFeatures.Add(featureObj);
else if (!valid)
Logger.features.Warn(
$"Feature not valid on {plugin.Item1.Name}: {featureObj.InvalidMessage}");
plugin.Item2.RemoveAt(i--);
}
else
{
Logger.features.Error($"Error parsing feature definition on {plugin.Item1.Name}");
Logger.features.Error(exception);
plugin.Item2.RemoveAt(i--);
}
}
foreach (var plugin in PluginsMetadata)
foreach (var feature in plugin.Features)
feature.Evaluate();
}
foreach (var plugin in parsedFeatures)
{
if (plugin.Item2.Count <= 0) continue;
Logger.features.Warn($"On plugin {plugin.Item1.Name}:");
foreach (var feature in plugin.Item2)
Logger.features.Warn($" Feature not found with name {feature.Item1}");
}
}
internal static void ReleaseAll()
{
ignoredPlugins = new HashSet<PluginMetadata>();
PluginsMetadata = new List<PluginMetadata>();
Feature.Reset();
GC.Collect();
}
internal static void Load(PluginMetadata meta)
{
if (meta.Assembly == null && meta.PluginType != null)
meta.Assembly = Assembly.LoadFrom(meta.File.FullName);
}
internal static PluginInfo InitPlugin(PluginMetadata meta)
{
if (meta.PluginType == null)
return new PluginInfo()
{
Metadata = meta,
Plugin = null
};
var info = new PluginInfo();
if (meta.Manifest.GameVersion != BeatSaber.GameVersion)
Logger.loader.Warn($"Mod {meta.Name} developed for game version {meta.Manifest.GameVersion}, so it may not work properly.");
try
{
Load(meta);
Feature denyingFeature = null;
if (!meta.Features.All(f => (denyingFeature = f).BeforeLoad(meta)))
{
Logger.loader.Warn(
$"Feature {denyingFeature?.GetType()} denied plugin {meta.Name} from loading! {denyingFeature?.InvalidMessage}");
ignoredPlugins.Add(meta);
return null;
}
var type = meta.Assembly.GetType(meta.PluginType.FullName);
var instance = (IBeatSaberPlugin)Activator.CreateInstance(type);
info.Metadata = meta;
info.Plugin = instance;
var init = type.GetMethod("Init", BindingFlags.Instance | BindingFlags.Public);
if (init != null)
{
denyingFeature = null;
if (!meta.Features.All(f => (denyingFeature = f).BeforeInit(info)))
{
Logger.loader.Warn(
$"Feature {denyingFeature?.GetType()} denied plugin {meta.Name} from initializing! {denyingFeature?.InvalidMessage}");
ignoredPlugins.Add(meta);
return null;
}
PluginInitInjector.Inject(init, info);
}
foreach (var feature in meta.Features)
try
{
feature.AfterInit(info);
}
catch (Exception e)
{
Logger.loader.Critical($"Feature errored in {nameof(Feature.AfterInit)}: {e}");
}
}
catch (AmbiguousMatchException)
{
Logger.loader.Error($"Only one Init allowed per plugin (ambiguous match in {meta.Name})");
// not adding to ignoredPlugins here because this should only happen in a development context
// if someone fucks this up on release thats on them
return null;
}
catch (Exception e)
{
Logger.loader.Error($"Could not init plugin {meta.Name}: {e}");
ignoredPlugins.Add(meta);
return null;
}
return info;
}
internal static List<PluginInfo> LoadPlugins()
{
InitFeatures();
return PluginsMetadata.Select(InitPlugin).Where(p => p != null).ToList();
}
}
}