chore: initialize standalone UPM package

Editor/PostProcessorAssemblyResolver.cs

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+#nullable enable
+
+using System.Collections.Generic;
+using System.IO;
+using System.Threading;
+using Mono.Cecil;
+using Unity.CompilationPipeline.Common.ILPostProcessing;
+
+namespace ShrinkShared.CodeGen
+{
+    internal sealed class PostProcessorAssemblyResolver : IAssemblyResolver
+    {
+        private readonly string[] _references;
+        private readonly Dictionary<string, AssemblyDefinition> _cache = new();
+        private AssemblyDefinition? _self;
+
+        public PostProcessorAssemblyResolver(ICompiledAssembly compiledAssembly)
+        {
+            _references = compiledAssembly.References;
+        }
+
+        public void AddAssemblyDefinitionBeingOperatedOn(AssemblyDefinition assemblyDefinition)
+        {
+            _self = assemblyDefinition;
+        }
+
+        public AssemblyDefinition? Resolve(AssemblyNameReference name)
+            => Resolve(name, new ReaderParameters(ReadingMode.Deferred));
+
+        public AssemblyDefinition? Resolve(AssemblyNameReference name, ReaderParameters parameters)
+        {
+            lock (_cache)
+            {
+                if (name.Name == _self?.Name.Name)
+                    return _self;
+
+                var path = FindPath(name);
+                if (path == null)
+                    return null;
+
+                var key = $"{path}{File.GetLastWriteTime(path)}";
+                if (_cache.TryGetValue(key, out var cached))
+                    return cached;
+
+                parameters.AssemblyResolver = this;
+                var assembly = AssemblyDefinition.ReadAssembly(ReadFileWithRetry(path), parameters);
+                _cache[key] = assembly;
+                return assembly;
+            }
+        }
+
+        private string? FindPath(AssemblyNameReference name)
+        {
+            foreach (var reference in _references)
+            {
+                if (Path.GetFileNameWithoutExtension(reference) == name.Name)
+                    return reference;
+            }
+
+            return null;
+        }
+
+        private static MemoryStream ReadFileWithRetry(string path, int retries = 5)
+        {
+            for (var i = 0; i < retries; i++)
+            {
+                try
+                {
+                    return new MemoryStream(File.ReadAllBytes(path));
+                }
+                catch (IOException) when (i < retries - 1)
+                {
+                    Thread.Sleep(100);
+                }
+            }
+
+            throw new IOException($"[ShrinkShared.CodeGen] 无法读取文件: {path}");
+        }
+
+        public void Dispose()
+        {
+        }
+    }
+}

Editor/PostProcessorAssemblyResolver.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: b750fb992bcdddc479a883b1b6bf5ef2
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Editor/PostProcessorReflectionImporter.cs

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+#nullable enable
+
+using System.Linq;
+using System.Reflection;
+using Mono.Cecil;
+
+namespace ShrinkShared.CodeGen
+{
+    internal sealed class PostProcessorReflectionImporter : DefaultReflectionImporter
+    {
+        private const string CoreLibName = "System.Private.CoreLib";
+        private readonly AssemblyNameReference? _corlib;
+
+        public PostProcessorReflectionImporter(ModuleDefinition module)
+            : base(module)
+        {
+            _corlib = module.AssemblyReferences.FirstOrDefault(reference => reference.Name is "mscorlib" or "netstandard");
+        }
+
+        public override AssemblyNameReference ImportReference(AssemblyName reference)
+        {
+            if (_corlib != null && reference.Name == CoreLibName)
+                return _corlib;
+
+            return base.ImportReference(reference);
+        }
+    }
+
+    internal sealed class PostProcessorReflectionImporterProvider : IReflectionImporterProvider
+    {
+        public IReflectionImporter GetReflectionImporter(ModuleDefinition module)
+            => new PostProcessorReflectionImporter(module);
+    }
+}

Editor/PostProcessorReflectionImporter.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 31170a0a3448b8f428b07fa251fe5d10
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Editor/ShrinkRegistryILPostProcessor.cs

@@ -0,0 +1,192 @@
+#nullable enable
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Mono.Cecil;
+using Mono.Cecil.Pdb;
+using Unity.CompilationPipeline.Common.Diagnostics;
+using Unity.CompilationPipeline.Common.ILPostProcessing;
+
+namespace ShrinkShared.CodeGen
+{
+    public sealed class ShrinkRegistryILPostProcessor : ILPostProcessor
+    {
+        public override ILPostProcessor GetInstance() => this;
+
+        public override bool WillProcess(ICompiledAssembly compiledAssembly)
+        {
+            // 注意：不能因为"引用了 ShrinkEventBus.Runtime"就处理该程序集。
+            // 一旦把 ShrinkApp.Core.Runtime 等核心程序集卷入 Cecil 读写，写回的 dll
+            // 会被 Unity 判定为 "references itself" 而整条依赖链拒绝加载。
+            // 只处理直接承载 Command/Network/App 注册表的程序集。
+            return compiledAssembly.References.Any(path =>
+                Path.GetFileNameWithoutExtension(path) is "ShrinkCommand.Runtime" or "ShrinkNetwork.Runtime"
+                    or "ShrinkApp.Core.Runtime");
+        }
+
+        public override ILPostProcessResult Process(ICompiledAssembly compiledAssembly)
+        {
+            var diagnostics = new List<DiagnosticMessage>();
+            if (!WillProcess(compiledAssembly))
+                return new ILPostProcessResult(compiledAssembly.InMemoryAssembly, diagnostics);
+
+            var assemblyDefinition = AssemblyDefinitionFor(compiledAssembly);
+            var module = assemblyDefinition.MainModule;
+
+            try
+            {
+                InjectShrinkCommandRegistry(module);
+                InjectShrinkNetworkRegistry(module);
+                InjectShrinkAppRegistry(module);
+            }
+            catch (Exception ex)
+            {
+                diagnostics.Add(new DiagnosticMessage
+                {
+                    DiagnosticType = DiagnosticType.Error,
+                    MessageData = $"[ShrinkShared.CodeGen] {ex.Message}"
+                });
+            }
+
+            return GetResult(assemblyDefinition, diagnostics);
+        }
+
+        private void InjectShrinkCommandRegistry(ModuleDefinition module)
+        {
+            var subscriberType = FindType(module, "ShrinkCommand.ShrinkCommandSubscriberAttribute", "ShrinkCommand.Runtime");
+            var commandAttributeType = FindType(module, "ShrinkCommand.ShrinkCommandAttribute", "ShrinkCommand.Runtime");
+            var registryCtor = FindTypeArrayConstructor(module,
+                "ShrinkCommand.ShrinkCommandStaticRegistryAttribute",
+                "ShrinkCommand.Runtime");
+
+            if (subscriberType == null || commandAttributeType == null || registryCtor == null)
+                return;
+
+            var subscriberTypes = module.Types
+                .Where(type => HasAttribute(type, subscriberType))
+                .Where(type => type.Methods.Any(method => method.IsStatic && HasAttribute(method, commandAttributeType)))
+                .Select(type => module.ImportReference(type))
+                .ToArray();
+
+            if (subscriberTypes.Length > 0)
+                AddAssemblyTypeArrayAttribute(module, registryCtor, subscriberTypes);
+        }
+
+        private void InjectShrinkNetworkRegistry(ModuleDefinition module)
+        {
+            var messageAttributeType = FindType(module, "ShrinkNetwork.ShrinkNetworkMessageAttribute", "ShrinkNetwork.Runtime");
+            var subscriberAttributeType = FindType(module, "ShrinkNetwork.ShrinkNetworkSubscriberAttribute", "ShrinkNetwork.Runtime");
+            var subscribeAttributeType = FindType(module, "ShrinkNetwork.ShrinkNetworkSubscribeAttribute", "ShrinkNetwork.Runtime");
+            var messageCtor = FindTypeArrayConstructor(module, "ShrinkNetwork.ShrinkNetworkMessageRegistryAttribute", "ShrinkNetwork.Runtime");
+            var subscriberCtor = FindTypeArrayConstructor(module, "ShrinkNetwork.ShrinkNetworkStaticSubscriberRegistryAttribute", "ShrinkNetwork.Runtime");
+
+            if (messageAttributeType != null && messageCtor != null)
+            {
+                var messageTypes = module.Types
+                    .Where(type => HasAttribute(type, messageAttributeType))
+                    .Select(type => module.ImportReference(type))
+                    .ToArray();
+                if (messageTypes.Length > 0)
+                    AddAssemblyTypeArrayAttribute(module, messageCtor, messageTypes);
+            }
+
+            if (subscriberAttributeType != null && subscribeAttributeType != null && subscriberCtor != null)
+            {
+                var subscriberTypes = module.Types
+                    .Where(type => HasAttribute(type, subscriberAttributeType))
+                    .Where(type => type.Methods.Any(method => method.IsStatic && HasAttribute(method, subscribeAttributeType)))
+                    .Select(type => module.ImportReference(type))
+                    .ToArray();
+                if (subscriberTypes.Length > 0)
+                    AddAssemblyTypeArrayAttribute(module, subscriberCtor, subscriberTypes);
+            }
+        }
+
+        private void InjectShrinkAppRegistry(ModuleDefinition module)
+        {
+            var installerAttributeType = FindType(module, "ShrinkApp.ShrinkAppModuleInstallerAttribute", "ShrinkApp.Core.Runtime");
+            var installerInterfaceType = FindType(module, "ShrinkApp.IShrinkAppModuleInstaller", "ShrinkApp.Core.Runtime");
+            var registryCtor = FindTypeArrayConstructor(module, "ShrinkApp.ShrinkAppInstallerRegistryAttribute", "ShrinkApp.Core.Runtime");
+
+            if (installerAttributeType == null || installerInterfaceType == null || registryCtor == null)
+                return;
+
+            var installerTypes = module.Types
+                .Where(type => !type.IsAbstract)
+                .Where(type => HasAttribute(type, installerAttributeType))
+                .Where(type => type.Interfaces.Any(item => item.InterfaceType.FullName == installerInterfaceType.FullName))
+                .Select(type => module.ImportReference(type))
+                .ToArray();
+
+            if (installerTypes.Length > 0)
+                AddAssemblyTypeArrayAttribute(module, registryCtor, installerTypes);
+        }
+
+        private static bool HasAttribute(ICustomAttributeProvider provider, TypeReference expectedAttributeType)
+        {
+            return provider.CustomAttributes.Any(attribute => attribute.AttributeType.FullName == expectedAttributeType.FullName);
+        }
+
+        private static void AddAssemblyTypeArrayAttribute(ModuleDefinition module, MethodReference ctor, TypeReference[] types)
+        {
+            var attribute = new CustomAttribute(ctor);
+            var typeTypeRef = module.ImportReference(typeof(Type));
+            attribute.ConstructorArguments.Add(new CustomAttributeArgument(
+                module.ImportReference(typeof(Type[])),
+                types.Select(type => new CustomAttributeArgument(typeTypeRef, type)).ToArray()));
+            module.Assembly.CustomAttributes.Add(attribute);
+        }
+
+        private static TypeReference? FindType(ModuleDefinition module, string fullName, string assemblyName)
+        {
+            var resolved = Type.GetType($"{fullName}, {assemblyName}", false);
+            return resolved == null ? null : module.ImportReference(resolved);
+        }
+
+        private static MethodReference? FindTypeArrayConstructor(ModuleDefinition module, string fullName, string assemblyName)
+        {
+            var typeRef = FindType(module, fullName, assemblyName);
+            var typeDef = typeRef?.Resolve();
+            var ctor = typeDef?.Methods.FirstOrDefault(method =>
+                method.IsConstructor &&
+                method.Parameters.Count == 1 &&
+                method.Parameters[0].ParameterType.IsArray &&
+                method.Parameters[0].ParameterType.GetElementType().FullName == module.ImportReference(typeof(Type)).FullName);
+            return ctor == null ? null : module.ImportReference(ctor);
+        }
+
+        private static AssemblyDefinition AssemblyDefinitionFor(ICompiledAssembly compiledAssembly)
+        {
+            var assemblyResolver = new PostProcessorAssemblyResolver(compiledAssembly);
+            var readerParameters = new ReaderParameters
+            {
+                SymbolStream = new MemoryStream(compiledAssembly.InMemoryAssembly.PdbData.ToArray()),
+                SymbolReaderProvider = new PdbReaderProvider(),
+                AssemblyResolver = assemblyResolver,
+                ReflectionImporterProvider = new PostProcessorReflectionImporterProvider(),
+                ReadingMode = ReadingMode.Immediate
+            };
+
+            var assemblyDefinition = AssemblyDefinition.ReadAssembly(
+                new MemoryStream(compiledAssembly.InMemoryAssembly.PeData.ToArray()),
+                readerParameters);
+            assemblyResolver.AddAssemblyDefinitionBeingOperatedOn(assemblyDefinition);
+            return assemblyDefinition;
+        }
+
+        private static ILPostProcessResult GetResult(AssemblyDefinition assemblyDefinition, List<DiagnosticMessage> diagnostics)
+        {
+            var pe = new MemoryStream();
+            var pdb = new MemoryStream();
+            assemblyDefinition.Write(pe, new WriterParameters
+            {
+                SymbolWriterProvider = new PdbWriterProvider(),
+                SymbolStream = pdb,
+                WriteSymbols = true
+            });
+            return new ILPostProcessResult(new InMemoryAssembly(pe.ToArray(), pdb.ToArray()), diagnostics);
+        }
+    }
+}

Editor/ShrinkRegistryILPostProcessor.cs.meta

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+guid: 0f07f372d8ceeed47aa4e5702fd1adef
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Editor/ShrinkShared.CodeGen.asmdef

@@ -0,0 +1,21 @@
+{
+  "name": "Unity.ShrinkShared.CodeGen",
+  "rootNamespace": "ShrinkShared.CodeGen",
+  "references": [],
+  "includePlatforms": [
+    "Editor"
+  ],
+  "excludePlatforms": [],
+  "allowUnsafeCode": true,
+  "overrideReferences": true,
+  "precompiledReferences": [
+    "Mono.Cecil.dll",
+    "Mono.Cecil.Mdb.dll",
+    "Mono.Cecil.Pdb.dll",
+    "Mono.Cecil.Rocks.dll"
+  ],
+  "autoReferenced": false,
+  "defineConstraints": [],
+  "versionDefines": [],
+  "noEngineReferences": false
+}

Editor/ShrinkShared.CodeGen.asmdef.meta

@@ -0,0 +1,7 @@
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+guid: 89b1954231cba2541ab97b45f6a407fe
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: