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DaZombieKiller
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Commit project files
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‎Build/Module.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<Module>
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<Name>UnityPluginManager</Name>
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<DefaultStartupProject>PluginManager.Installer</DefaultStartupProject>
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<Packages>
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<Package Uri="https-nuget://www.nuget.org/api/v2/|Mono.Cecil" Folder="Dependencies/Mono.Cecil" GitRef="0.9.6.4" />
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</Packages>
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</Module>

‎Build/Projects/PluginManager.Installer.definition‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project Name="PluginManager.Installer" Path="Source/PluginManager.Installer" Type="Console">
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<References>
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<!-- GAC Assemblies -->
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<!-- NuGet -->
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<Reference Include="Mono.Cecil" />
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</References>
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<Files>
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<!-- C# Sources -->
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<Compile Include="Program.cs" />
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</Files>
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</Project>

‎Build/Projects/PluginManager.definition‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project Name="PluginManager" Path="Source/PluginManager" Type="Library">
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<References>
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<!-- GAC Assemblies -->
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<!-- Unity API -->
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<Reference Include="UnityEngine" />
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</References>
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<!-- The framework version must be v3.5 or lower,
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because that's the only one supported by all
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versions of Unity. -->
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<Properties>
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<FrameworkVersions>
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<Platform Name="Windows"><Version>v3.5</Version></Platform>
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<Platform Name="Linux"><Version>v3.5</Version></Platform>
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<Platform Name="MacOS"><Version>v3.5</Version></Platform>
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</FrameworkVersions>
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</Properties>
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<Files>
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<Compile Include="PluginManager.cs" />
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<Compile Include="Plugin/Attributes.cs" />
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<Compile Include="Plugin/Extensions/Extensions.cs" />
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</Files>
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</Project>

‎Build/Projects/UnityEngine.definition‎

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<?xml version="1.0" encoding="utf-8" ?>
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<ExternalProject Name="UnityEngine">
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<Binary
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Name="UnityEngine"
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Path="Managed/UnityEngine.dll"
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/>
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</ExternalProject>

‎Managed/.gitkeep‎

Whitespace-only changes.

‎Protobuild.exe‎

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‎Source/PluginManager.Installer/Program.cs‎

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using System;
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using System.IO;
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using System.Linq;
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using Mono.Cecil;
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using Mono.Cecil.Cil;
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namespace PluginManager.Installer
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{
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internal class Program
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{
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/// <summary>The program entry point.</summary>
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private static void Main()
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{
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string enginePath, managedPath;
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var resolver = new DefaultAssemblyResolver();
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var enginePaths = Directory.EnumerateFiles(
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"./", "UnityEngine.dll", SearchOption.AllDirectories).ToArray();
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if (enginePaths.Length < 1)
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throw new FileNotFoundException("UnityEngine.dll");
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else
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{
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// use the first instance of UnityEngine.dll found
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enginePath = enginePaths.First();
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managedPath = Path.GetDirectoryName(enginePath) ?? string.Empty;
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// add the Managed directory as a search path
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resolver.AddSearchDirectory(managedPath);
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// copy the plugin dlls to the managed path
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if (File.Exists("PluginManager.dll"))
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File.Copy("PluginManager.dll", Path.Combine(managedPath, "PluginManager.dll"), true);
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}
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// load the UnityEngine module
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var engine = ModuleDefinition.ReadModule(
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new MemoryStream(File.ReadAllBytes(enginePath)),
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new ReaderParameters { AssemblyResolver = resolver });
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var gameObject = engine.GetType("UnityEngine", "GameObject");
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// load the PluginManager module
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var plugin = ModuleDefinition.ReadModule(Path.Combine(managedPath, "PluginManager.dll"));
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var manager = plugin.GetType("PluginManager", "PluginManager");
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// has UnityEngine already been patched?
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if (gameObject.Methods.Any(m => m.Name == ".cctor"))
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{
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// remove the static constructor
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gameObject.Methods.Remove(
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gameObject.Methods.Single(m => m.Name == ".cctor"));
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// save changes
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engine.Write(enginePath);
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Console.WriteLine("Plugin manager uninstalled.");
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Console.WriteLine("Press any key to exit.");
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Console.ReadKey();
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return;
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}
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// create a static constructor
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var cctor = new MethodDefinition(".cctor",
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MethodAttributes.Private | MethodAttributes.Static |
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MethodAttributes.HideBySig | MethodAttributes.SpecialName |
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MethodAttributes.RTSpecialName | MethodAttributes.ReuseSlot, engine.TypeSystem.Void);
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var il = cctor.Body.GetILProcessor();
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cctor.Body.Instructions.Add(il.Create(OpCodes.Call,
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engine.Import(manager.Methods.Single(m => m.Name == "Initialize"))));
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cctor.Body.Instructions.Add(il.Create(OpCodes.Ret));
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// add the static constructor
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gameObject.Methods.Add(cctor);
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// save changes
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engine.Write(enginePath);
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Console.WriteLine("Plugin manager installed.");
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Console.WriteLine("Press any key to exit.");
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Console.ReadKey();
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}
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}
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}

‎Source/PluginManager/Plugin/Attributes.cs‎

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using System;
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namespace PluginManager.Plugin
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{
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/// <summary></summary>
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[AttributeUsage(AttributeTargets.Class)]
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public class OnGameInitAttribute : Attribute {}
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}

‎Source/PluginManager/Plugin/Extensions/Extensions.cs‎

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using System;
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using UnityEngine;
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namespace PluginManager.Plugin.Extensions
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{
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/// <summary></summary>
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public static class Extensions
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{
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/// <summary></summary>
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/// <param name="self"></param>
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/// <param name="component"></param>
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public static void RemoveComponent(this GameObject self, Type component)
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{
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UnityEngine.Object.Destroy(self.GetComponent(component));
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}
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/// <summary></summary>
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/// <param name="self"></param>
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/// <typeparam name="T"></typeparam>
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public static void RemoveComponent<T>(this GameObject self)
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{
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RemoveComponent(self, typeof(T));
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}
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}
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}

‎Source/PluginManager/PluginManager.cs‎

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using System;
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using System.IO;
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using System.Reflection;
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using System.Collections.Generic;
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using UnityEngine;
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using PluginManager.Plugin;
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namespace PluginManager
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{
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/// <summary></summary>
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public class PluginManager : MonoBehaviour
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{
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// Static fields
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// --------------------------------------------------------------------------------
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private static bool _initialized;
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private static GameObject _gameObject;
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private static List<Type> _types;
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// Static methods
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// --------------------------------------------------------------------------------
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/// <summary></summary>
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public static void Initialize()
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{
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if (_initialized) return;
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_gameObject = new GameObject("Plugin Manager");
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_gameObject.AddComponent<PluginManager>();
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DontDestroyOnLoad(_gameObject);
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_initialized = true;
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}
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// Methods
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// --------------------------------------------------------------------------------
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private void Awake()
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{
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// load all plugins
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LoadPlugins();
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}
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private static void LoadPlugins()
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{
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if (_types != null) _types.Clear();
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else _types = new List<Type>();
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if (Directory.Exists("./Plugins"))
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foreach (var path in Directory.GetFiles("./Plugins", "*.dll"))
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{
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try
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{
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// load plugin
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var module = Assembly.LoadFile(path);
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// search for behaviours
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foreach (var type in module.GetTypes())
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{
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if (type.IsSubclassOf(typeof(MonoBehaviour)) &&
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type.IsDefined(typeof(OnGameInitAttribute), false))
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{
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_types.Add(type);
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}
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}
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}
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catch (BadImageFormatException)
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{
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Debug.LogErrorFormat("Bad plugin: {0}", path);
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}
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}
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foreach (var t in _types)
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{
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if (_gameObject.GetComponent(t))
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Destroy(_gameObject.GetComponent(t));
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_gameObject.AddComponent(t);
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}
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}
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private void Update()
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{
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// reload plugins with end key
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if (Input.GetKeyDown(KeyCode.End))
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LoadPlugins();
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}
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}
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}

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